You can play tennis safely in hot weather by hydrating before, during, and after play, wearing lightweight and light-coloured clothing, scheduling sessions early in the morning or late in the evening, taking full advantage of changeover breaks to cool down, and knowing the warning signs of heat-related illness. According to the USTA, when air temperature rises above 95 degrees Fahrenheit, a player can make up to 60 more mistakes per hour due to the effects of heat on physical and mental performance. The National Federation of State High School Associations (NFHS) reports that losing just 1 to 2 percent of body weight through sweat can negatively affect athletic performance, and losses of 3 percent or more significantly increase the risk of heat illness. For players and parents in North York, where summer temperatures regularly climb into the high twenties and thirties Celsius, knowing how to manage the heat is essential for safe and enjoyable tennis all season long.
How Do Tennis Players Play in Extreme Heat?
Tennis players play in extreme heat by pre-cooling their bodies before matches, drinking fluids at every changeover, wearing moisture-wicking clothing, using ice towels during breaks, and adjusting their style of play to conserve energy. At the professional level, players have access to medical staff, ice baths, and cooling rooms, but the same core principles apply to recreational and junior players at every level.
According to research published in PubMed Central by Bergeron et al., competitive tennis in the heat can prompt substantial sweat losses and extensive body water and electrolyte deficits, along with thermal strain that considerably challenges a player’s physiology, perception of effort, and on-court performance. The study found that body core temperature during match play typically peaks around 38.9 degrees Celsius (102 degrees Fahrenheit) on hard courts, which is below the dangerous threshold of 40 degrees but still high enough to impair decision-making and reaction time.
Former world number one Andy Murray, who trained in Spain as a teenager, has said that scheduling training to avoid the hottest part of the day was one of the most important adjustments he learned for playing in the heat. He also noted that hard courts reflect heat and feel noticeably warmer than grass courts, making surface choice a factor in heat management when possible.
For families in the Bayview Village and Willowdale areas who play during North York’s hottest summer weeks, adopting these same habits makes a real difference. Players who learn proper hydration strategies during tennis matches reduce their risk of heat-related problems and perform better on court even in challenging conditions.
Is 90 Degrees Too Hot to Play Tennis?
No, 90 degrees Fahrenheit (32 degrees Celsius) is not automatically too hot to play tennis, but it does require extra precautions for hydration, cooling, and rest. Most recreational players can safely play at 90 degrees if they are properly hydrated, wearing appropriate clothing, and taking breaks in the shade during changeovers.
The real danger is not temperature alone but the combination of heat and humidity. According to the ATP Tour’s new extreme heat rule effective from 2026, play is modified when the Wet Bulb Globe Temperature (WBGT) reaches 30.1 degrees Celsius (about 86 degrees Fahrenheit). The WBGT factors in temperature, humidity, wind speed, and sun angle, which gives a more accurate picture of heat stress than air temperature alone. When the WBGT exceeds 32.2 degrees Celsius (about 90 degrees Fahrenheit), professional matches are halted entirely.
According to the Gatorade Sports Science Institute, heat stroke is possible at any combination of ambient temperature above 80 degrees Fahrenheit (26.7 degrees Celsius) and relative humidity above 40 percent for athletes who are not heat-acclimatized. North York summers can easily reach these thresholds, especially during the July and August weeks when humidity along the Don Valley Parkway corridor and near the East Don River Valley can be very high.
The safest approach for players at courts near Sheppard Avenue East or Bayview Avenue is to check both the temperature and the humidity before heading out, and to adjust the duration and intensity of play accordingly. Parents sending children to outdoor programs should verify that coaches follow heat safety protocols. Programs like the junior summer tennis camp at BVTC build hydration and cooling breaks into every session.
What Is the Heat Rule in Tennis?
The heat rule in tennis is a set of regulations that allows for cooling breaks and suspension of play when on-court temperatures reach dangerous levels. The ATP Tour introduced a new heat rule effective from the 2026 season that uses the Wet Bulb Globe Temperature (WBGT) to trigger two levels of intervention.
According to the ATP, when the WBGT reaches 30.1 degrees Celsius or higher during the first two sets of a best-of-three singles match, either player can request a 10-minute cooling break after the second set. During this break, players can hydrate, change clothing, shower, use cooling measures, and receive coaching, all under the supervision of ATP medical staff. If the WBGT exceeds 32.2 degrees Celsius, the match is suspended entirely until conditions improve.
The WTA has had a similar heat rule in place since 1992, making it one of the longest-standing player safety measures in professional tennis. Grand Slam tournaments set their own heat policies. The Australian Open uses a Heat Stress Scale with five levels, where Level 4 triggers 10-minute breaks and Level 5 halts play on all outdoor courts. The US Open, French Open, and Wimbledon use WBGT-based guidelines as well.
The push for the ATP rule came after brutal conditions at the 2024 Shanghai Masters, where defending champion Jannik Sinner withdrew due to severe leg cramps and Novak Djokovic vomited during a match. Djokovic told reporters it was “brutal when you have over 80 percent humidity day after day.” An Associated Press analysis in 2023 also showed that average high temperatures at Grand Slam tournaments have steadily gotten higher in recent decades due to climate change.
Do They Cancel Tennis if It Is Too Hot?
Yes, professional tennis matches are cancelled or suspended if the heat reaches dangerous levels, as measured by the Wet Bulb Globe Temperature. Under the new ATP rule effective from 2026, play is suspended entirely when the WBGT exceeds 32.2 degrees Celsius (approximately 90 degrees Fahrenheit). The ITF uses a colour-coded Heat Stress Scale at the Olympics, where Level 5 triggers a full halt of play on all outdoor courts.
At the recreational and junior level, cancellation decisions are typically made by tournament directors, club managers, or camp coaches based on local conditions. There is no universal temperature threshold that applies to all recreational play, but many youth sports organizations recommend pausing outdoor activity when the heat index exceeds 104 degrees Fahrenheit (40 degrees Celsius) or when the WBGT exceeds 32 degrees.
For parents in North York whose children play at courts near Finch Avenue East, Leslie Street, or the parks along Don Mills Road, the most important thing is to communicate with coaches about heat policies before the season starts. Ask what temperature triggers modified play, how frequently water breaks are scheduled, and what the plan is if a child shows signs of heat illness. Coaches at injury prevention-focused programs at BVTC follow structured heat safety protocols during all outdoor summer sessions.
How to Not Overheat in Tennis
To not overheat in tennis, you need to manage three things: hydration, body temperature, and exertion level. Addressing all three before, during, and after play gives your body the best chance of staying cool and performing well even in high temperatures.
Hydrate Before You Step on Court
According to the USTA, players should begin hydrating five to six days before competition in hot weather, not just the morning of the match. On match day, drink 12 to 16 ounces of water to start, followed by another 12 to 16 ounces between 60 and 90 minutes before play. Ten minutes before stepping on court, have another 8 ounces of water or a sports drink.
Research from Ohio University confirms that athletes can sweat 1 to 2 litres per hour in the heat but often drink less than what they lose. The USTA notes that for every 1 percent of body weight lost during play, core body temperature can rise by 0.5 degrees Fahrenheit, and the heart must work 3 to 7 beats per minute harder at the same workload. Starting well-hydrated gives your body a larger buffer before these effects begin. Players who pair proper hydration with smart pre-match nutrition perform significantly better in the heat.
Drink at Every Changeover
During play, drink 4 to 8 ounces of fluid at every changeover if you are a light to moderate sweater, and 8 to 16 ounces if you are a heavy sweater. Alternate between water and an electrolyte drink to replace the sodium, potassium, and other minerals lost through sweat. According to ASICS, cold drinks are absorbed by the body faster and are more refreshing, so bringing a cooler with ice to the court is a smart move during summer matches near Bayview Village Park or Cummer Park.
Do not wait until you feel thirsty to drink. According to Sports Cardiology BC, the body can already be at 2 percent dehydration by the time thirst is felt, and at that point, both physical and mental performance have already declined. A 2 percent loss of body weight from sweat causes noticeable decreases in reaction time, endurance, and decision-making, according to research published in Human Kinetics. For tennis, where split-second reactions and shot selection determine the outcome of every point, even mild dehydration is a serious competitive disadvantage.
Cool Your Body Between Points and During Breaks
Use changeovers to sit in the shade, apply ice towels to your neck, wrists, and forehead, and drink cold fluids. According to a study on WTA players published in PubMed Central, a 10-minute cooling break between sets reduced core body temperature by 0.25 degrees Celsius. While that may sound small, it is enough to meaningfully delay the onset of heat-related fatigue.
Before the match, spending time in an air-conditioned space helps lower your baseline core temperature. The USTA recommends using an ice vest, ice blanket, or ice towels for 15 minutes about an hour before play, followed by a 5-minute cold shower 30 to 40 minutes before stepping on court. For maximum benefit, consuming 8 to 20 ounces of a cold slushy slowly 30 minutes before the match combines internal and external cooling.
Wear the Right Clothing
Lightweight, loose-fitting, light-coloured clothing made from moisture-wicking fabric is essential for hot weather tennis. Light colours reflect sunlight while dark colours absorb it, which can make a meaningful difference in how hot your body gets over the course of a match. Wear a hat or visor to protect your head and face, and apply broad-spectrum sunscreen with SPF 30 or higher to all exposed skin.
Andy Murray noted during a heatwave that he played in an outfit partly made from merino wool at Wimbledon because natural fibres can be surprisingly effective at wicking sweat and keeping the body cool. For most recreational players in the York Mills and Lansing areas, standard performance tennis apparel from any major sports brand will do the job as long as it is light in colour and breathable.
Adjust Your Game Plan
Playing in the heat is not the time to grind out long baseline rallies. Shorter points conserve energy and reduce the amount of time your body spends under maximum exertion. Consider bringing your game closer to the net to finish points faster. Use more slice shots, which require less physical effort than heavy topspin, and take the first opportunity to attack short balls rather than extending rallies.
Coaches at adult group tennis lessons at BVTC teach players to modify their tactics for hot conditions, including using the serve plus one pattern to win points quickly and conserving energy for the moments that matter most in each set.
How to Play Tennis in Extreme Heat
Playing tennis in extreme heat requires heat acclimatization, aggressive hydration, strategic scheduling, and the discipline to stop if your body shows warning signs of distress. Extreme heat is generally defined as a heat index above 100 degrees Fahrenheit (38 degrees Celsius) or a WBGT above 30 degrees Celsius.
According to the Gatorade Sports Science Institute, heat acclimatization takes one to two weeks of graduated exposure to hot conditions. During this period, the body adapts by sweating sooner, sweating in greater volume over a wider area of the body, and retaining more water and sodium. Blood volume increases, which allows the heart to pump more blood at a lower heart rate. Athletes who go through this acclimatization process perform significantly better and are at far lower risk of heat illness than those who jump straight into intense activity in the heat.
For players in North York who play primarily indoors during the winter and spring, the transition to outdoor summer play near Steeles Avenue, Edwards Gardens, or Sunnybrook Park requires a deliberate ramp-up period. Start with shorter, lower-intensity sessions during the first week of outdoor play and gradually increase duration and effort over the following 10 to 14 days. This is especially important for junior players whose bodies are still developing their thermoregulation systems. Parents should learn what to expect during junior tennis development to support safe training in all conditions.
At What Temperature Are Sports Cancelled?
There is no single universal temperature at which all sports are cancelled, but most governing bodies use the Wet Bulb Globe Temperature (WBGT) to guide their decisions. In professional tennis, the ATP suspends play when the WBGT exceeds 32.2 degrees Celsius (approximately 90 degrees Fahrenheit). The ITF suspends Olympic tennis at Level 5 on their Heat Stress Scale. Many youth sports organizations in North America follow NFHS guidelines that recommend stopping outdoor activity when the WBGT exceeds 32.2 degrees Celsius.
The California Interscholastic Federation, one of the most referenced youth sports safety authorities, states that heat-related illness in student athletes can be prevented if coaches and athletes are properly educated about heat safety and if activity is modified based on environmental conditions. Their guidelines emphasize gradual acclimatization, adequate hydration, and regular monitoring of conditions throughout the day.
For recreational tennis in the Newtonbrook and Henry Farm neighbourhoods, a practical rule of thumb is to check the weather forecast and the humidex or heat index before heading to the court. If the combined heat index exceeds 40 degrees Celsius (104 degrees Fahrenheit), it is safer to move the session indoors, play later in the evening, or reschedule. The health benefits of tennis are best enjoyed when players stay safe and listen to their bodies.
What Are the 5 R’s of Recovery After Playing Tennis in the Heat?
The 5 R’s of recovery after playing tennis in the heat are Rehydrate, Refuel, Repair, Rest, and Repeat. Following this framework after every hot-weather session helps your body bounce back faster and prepares you for the next day on court.
Rehydrate means replacing all fluids lost through sweat. According to the USTA, players should drink 16 to 24 ounces of water for every pound of body weight lost during the session. Weighing yourself before and after play gives you an exact number to target. Refuel means eating carbohydrate-rich foods within 30 minutes of finishing play to restore glycogen in the muscles. Low-fat chocolate milk is one of the most effective recovery drinks because it provides the ideal ratio of carbohydrates to protein along with fluids and electrolytes.
Repair means consuming 15 to 25 grams of protein within two hours of play to support muscle recovery. Rest means giving your body adequate sleep and downtime, which is especially important after heat exposure because the body continues to regulate its core temperature for hours after intense activity. Repeat means doing all of this consistently after every session, not just on the hottest days. Players enrolled in multi-day sessions of BVTC summer programs and camps who follow the 5 R’s between days arrive at the courts each morning feeling better and performing at a higher level.
For families heading home after practice along Yonge Street or through the neighbourhoods near North York Centre Station, having a recovery snack packed in the car makes a measurable difference. A container of yogurt, a peanut butter sandwich on whole wheat bread, or a bottle of chocolate milk provides everything a young player needs to start the recovery process right away.
Warning Signs of Heat-Related Illness on the Tennis Court
Every tennis player, parent, and coach should be able to recognize the warning signs of heat illness. Heat-related problems progress through stages, from mild to life-threatening, and catching the early signs prevents the situation from getting worse.
Heat cramps are the first warning sign. Painful muscle cramps in the legs, arms, or abdomen during or after play indicate that the body is losing too much water and electrolytes through sweat. The treatment is to stop playing, move to a cool area, drink fluids with electrolytes, and gently stretch the affected muscles.
Heat exhaustion is more serious. Symptoms include heavy sweating, weakness, cold or clammy skin, nausea, dizziness, headache, and a fast but weak pulse. According to the NFHS, a player experiencing heat exhaustion should stop all activity immediately, move to an air-conditioned or shaded area, apply cold towels, and drink fluids. The player should not return to play until all symptoms have completely resolved, which may take at least 24 hours.
Heat stroke is a medical emergency. Symptoms include a body temperature above 40 degrees Celsius (104 degrees Fahrenheit), hot and dry skin with no sweating, confusion, rapid and strong pulse, and loss of consciousness. According to Sadler Sports, heat stroke can result in permanent disability or death if left untreated. If you suspect heat stroke in any player at courts near Sheppard-Yonge Station, Earl Bales Park, or anywhere else, call emergency services immediately and begin cooling the person with ice and cold water while waiting for help to arrive.
Hot Weather Tennis Safety Comparison
The table below compares hydration, cooling, and play modification strategies for different temperature ranges based on published sports medicine guidelines.
| Temperature Range | Risk Level | Hydration Strategy | Play Modifications |
|---|---|---|---|
| Below 26°C (79°F) | Low | Normal hydration, drink at changeovers | No modifications needed |
| 26-30°C (79-86°F) | Moderate | Pre-hydrate 24 hrs ahead, electrolytes during play | Light clothing, shade breaks, avoid midday play |
| 30-32°C WBGT (86-90°F) | High | Aggressive hydration, cold fluids, slushy pre-match | 10-min cooling breaks (ATP/WTA rule), ice towels, shorter sessions |
| Above 32°C WBGT (90°F+) | Extreme | Continuous fluid replacement, medical supervision | Professional play suspended, recreational play should stop or move indoors |
Sources: ATP Tour (2026 Heat Rule), USTA, NFHS, Gatorade Sports Science Institute, PubMed Central (Bergeron et al.), Sadler Sports Risk Management
Frequently Asked Questions
How Much Water Should I Drink Before Playing Tennis in the Heat?
You should drink 12 to 16 ounces of water to start on match day, followed by another 12 to 16 ounces between 60 and 90 minutes before play, and then 8 ounces 10 minutes before stepping on court. According to the USTA, starting hydration five to six days before competition in hot weather is ideal for optimal performance. Players at courts near Bayview Village Shopping Centre or Elkhorn Drive should carry a large insulated water bottle to every session and pre-chill their drinks for faster absorption.
Can Children Play Tennis When It Is Very Hot Outside?
Yes, children can play tennis in warm weather, but they need more frequent water breaks, shorter session lengths, and closer supervision than adults. Children’s bodies are less efficient at regulating temperature, and they are more susceptible to heat illness. According to the NFHS, losing 1 to 2 percent of body weight through sweat negatively impacts performance at any age. Parents in the Don Valley Village and Pleasant View areas should confirm that summer programs include shaded rest areas and mandatory hydration breaks every 15 to 20 minutes.
What Time of Day Is Safest to Play Tennis in Summer?
The safest time to play tennis in summer is before 10 a.m. or after 6 p.m. According to the Southern California Tennis Association Foundation, the midday sun between 10 a.m. and 2 p.m. is the most intense and dangerous. For players near Lawrence Avenue East or Wilson Avenue, early morning sessions offer the best combination of cooler temperatures, lower humidity, and reduced UV exposure.
Are Hard Courts Hotter Than Clay or Grass Courts?
Yes, hard courts are generally hotter than clay or grass courts because the surface absorbs and reflects heat back toward the player. Andy Murray has confirmed that hard courts feel noticeably warmer than grass in the same air temperature. A research review published in PubMed Central recorded peak body core temperatures of 38.9 degrees Celsius on hard courts during professional match play. Players who have access to different court surfaces near North York General Hospital or Bayview Arena should consider choosing grass or clay courts during the hottest days of summer when possible.
Should I Use Electrolyte Drinks or Just Water During Hot Weather Tennis?
You should use a combination of both water and electrolyte drinks during hot weather tennis. Water is the primary hydration source, but electrolyte drinks help replace the sodium, potassium, and other minerals lost through sweat. According to the SCTA Foundation, a good ratio is one sip of electrolyte drink for every two sips of water. This balance prevents both dehydration and the excessive sodium depletion that can cause muscle cramps during long matches in the heat.
How Long Does It Take to Get Used to Playing Tennis in the Heat?
It takes approximately one to two weeks of gradual exposure to get used to playing tennis in the heat. According to the Gatorade Sports Science Institute, heat acclimatization causes the body to sweat sooner, sweat in greater volume, retain more water and sodium, and increase blood volume. Players near Edithvale Park or Cummer Park Community Centre who transition from indoor winter play to outdoor summer sessions should spend the first week at reduced intensity, gradually building up to full match play over 10 to 14 days.
What Should I Do if a Fellow Player Shows Signs of Heat Stroke?
If a fellow player shows signs of heat stroke, including confusion, hot and dry skin, rapid pulse, or loss of consciousness, call 911 immediately. While waiting for emergency services, move the person to the coolest available area, remove excess clothing, and apply ice packs or cold water to the neck, armpits, and groin to lower body temperature as quickly as possible. According to the NFHS and Sadler Sports, heat stroke can cause permanent disability or death if not treated immediately. Do not wait for symptoms to improve on their own. Quick action at courts near Mel Lastman Square or BVTC summer camp sessions can save a life.
Final Thoughts
Playing tennis in the heat is safe when you respect your body’s limits and prepare properly. Hydrate aggressively, wear the right clothing, schedule play during cooler hours, acclimatize gradually, and never ignore the warning signs of heat illness. The data is clear: a 2 percent loss of body weight from dehydration measurably impairs both physical and mental performance, and ignoring heat symptoms can lead to life-threatening consequences. Every player, parent, and coach has a responsibility to put safety first, especially during the hottest weeks of the North York summer.
Families across the area, from Banbury-Don Mills and Parkwoods-Donalda to Concord Park Place and Westminster-Branson, count on safe, well-organized tennis programming to keep their children active and healthy through the summer months. The coaching team at Bayview Village Tennis Camp has been running summer programs for over 40 years with OTA-certified coaches who prioritize player safety alongside skill development. With small group ratios, structured hydration schedules, and heat-aware session planning, BVTC provides a safe environment for every player to improve their game even during the warmest weeks of the year.
Book your child’s spot today by calling (905) 889-7293 or visiting the contact page. Spring, summer, and fall programs are available for juniors of all ages and skill levels, along with adult group lessons and private coaching for players who want personalized instruction year-round.
