How hot is too hot for kids to play sport?
The short answer
There's no single temperature where kids' sport becomes unsafe. Heat risk depends on temperature, humidity, sun, wind and the sport itself, which is why Sports Medicine Australia uses a combined risk rating rather than one cut-off (Sports Medicine Australia, 2021). The bigger risk with kids is that they don't notice the warning signs or stop to cool down, so adults need to build in the breaks (Sports Medicine Australia).
Key takeaways
- Sports Medicine Australia's Sports Heat Tool rates heat stress as Low, Moderate, High or Extreme, and recommends delaying or cancelling play at Extreme (Sports Medicine Australia).
- The tool is built mainly for adult community sport, so SMA advises erring on the side of caution for junior sport (Sports Medicine Australia).
- Kids absorbed in play are unlikely to stop for water or shade on their own (Sydney Children's Hospitals Network, 2026).
- Heatstroke is a medical emergency: a temperature above 40°C, hot dry skin and confusion mean calling Triple Zero (000) (Sydney Children's Hospitals Network, 2026).
- Kids need sun protection whenever the UV Index is 3 or more, and can burn in as little as 10 minutes (Royal Children's Hospital Melbourne, 2025).
Why isn't there one "too hot" temperature?
Because 32°C on a dry, breezy morning is very different from 32°C on a sticky, still afternoon. Sports Medicine Australia's Extreme Heat Policy, developed with University of Sydney researchers, weighs temperature, humidity, sun, wind, how much heat a sport makes the body produce and what players wear (Sports Medicine Australia, 2021).
Its free Sports Heat Tool turns that into a rating of Low, Moderate, High or Extreme, with hourly and 7-day forecasts and suggested actions (Sports Medicine Australia). At Extreme, the advice is to delay or cancel play (Sports Medicine Australia). A University of Sydney project is working on specific recommendations for children and young people (Sports Medicine Australia, 2021), so for now, treat a High rating as a reason to scale back for kids.
Are kids more at risk in the heat than adults?
Mostly it's about behaviour, and the youngest kids need the most care. SMA says the evidence suggests children aged about 10 to 16 are not at greater physical risk of heat illness than adults, but they may not recognise warning signs, slow down or seek cooling (Sports Medicine Australia).
The Sydney Children's Hospitals Network adds that children don't regulate heat as well as adults and are often too absorbed in play to stop for water or shade, so adults need to prompt breaks (Sydney Children's Hospitals Network, 2026). Risk is highest when kids are outdoors for long periods in hot, humid conditions (Sydney Children's Hospitals Network, 2026).
What are the warning signs of heat illness?
Heat exhaustion (the early stage, when the body is struggling to cool itself) shows up as heavy sweating, pale and clammy skin, tiredness, dizziness, headache, cramps or nausea (Sydney Children's Hospitals Network, 2026). Move your child into shade, loosen clothing, cool them with water or ice packs on the neck, armpits and groin, and give cool water (Sydney Children's Hospitals Network, 2026).
Heatstroke (when the body's cooling system fails) is an emergency. Signs include a temperature above 40°C, red, hot, dry skin, confusion, slurred speech or collapse (Sydney Children's Hospitals Network, 2026). Call Triple Zero (000) and start cooling straight away (Sydney Children's Hospitals Network, 2026).
How do I keep my child safe at hot-weather sport?
Plan around the heat and the sun, not just the thermometer:
- Drink before, during and after. SMA recommends staying hydrated throughout, with frequent rest breaks in the shade (Sports Medicine Australia).
- Dress light. Lightweight, breathable clothing helps sweat do its job (Sports Medicine Australia).
- Check the UV, not just the temperature. Use sun protection whenever the UV Index is 3 or more: clothing, SPF50+ sunscreen reapplied every two hours, a broad-brimmed hat, shade and sunglasses (Royal Children's Hospital Melbourne, 2025).
- Touch-test equipment. Metal, plastic, rubber surfaces and artificial grass can burn little hands and feet (NSW Department of Education, 2025).
- Ask the coach about their plan. Good providers already check heat ratings and schedule drink breaks.
A simple plan for a hot Saturday
Hot days don't have to be couch days. Shift the timing and the setting, and kids can still move:
| Time | Idea | Free or paid |
|---|---|---|
| Early morning | Beach walk, rock pools or the playground before the heat builds | Free |
| Mid-morning | An indoor class, like gymnastics, climbing, dance or swimming | Paid |
| Middle of the day | Rest, lunch and quiet play inside | Free |
| Late afternoon | A shady park, library session or local community event | Free |
| If it's still hot | Skip the outdoor training and swap in a drop-in indoor session | Paid |
Where jumpIN fits
Summer plans change with the forecast, and paying for a whole term doesn't. With jumpIN you can book a single indoor class when the heat rating climbs, or stick with a term when the weather plays nice. Every provider shows their safety checks and qualifications before you book, so you know who's looking after your kids on a hot day. And our free activities section helps you find shady playgrounds, markets and community events nearby. Plan your next hot weekend at jumpinclasses.com.
FAQ
Should kids' sport be cancelled on hot days? Play should be delayed or cancelled when the Sports Heat Tool rates the risk as Extreme, and junior sport should err on the side of caution (Sports Medicine Australia).
What's the difference between heat exhaustion and heatstroke? Heat exhaustion brings heavy sweating, pale clammy skin and dizziness; heatstroke brings a temperature above 40°C, hot dry skin and confusion, and needs Triple Zero (000) (Sydney Children's Hospitals Network, 2026).
When do kids need sunscreen? Whenever the UV Index is 3 or more, using SPF50+ applied 20 minutes before going out and reapplied every two hours (Royal Children's Hospital Melbourne, 2025).
Sources
- Sports Medicine Australia, Hot weather (policies and guidelines, including the Sports Heat Tool) (accessed 27 October 2026).
- Sports Medicine Australia, SMA unveils new extreme heat policy (23 February 2021).
- Sydney Children's Hospitals Network, Heat exhaustion and heatstroke (last updated 11 May 2026).
- Royal Children's Hospital Melbourne, Sun safety fact sheet (reviewed December 2025).
- NSW Department of Education, Keeping babies and young children safe in summer (updated 30 September 2025).
Written by the jumpIN team, parents on the Northern Beaches.