Running in warm weather can feel brilliant. The lighter evenings, dry paths and sunshine make it much easier to get outside. But once the temperature rises, even an easy run can quickly feel much harder than expected.
Heat and humidity place extra stress on the body. Your heart rate can rise, your sweat rate increases and your usual pace may feel more difficult than normal. That does not mean you need to stop running through summer, but it does mean your approach needs to change.
Here are 10 practical tips to help you run more comfortably, stay safer and get the most from your summer training.
Quick summer running checklist
- Run early in the morning or later in the evening where possible.
- Wear lightweight, breathable and moisture-wicking clothing.
- Hydrate before, during and after your run.
- Use electrolytes for longer, hotter or sweatier sessions.
- Slow your pace and focus on effort rather than speed.
- Choose shaded routes, parks, trails or coastal paths.
- Stop if you feel dizzy, faint, confused or unusually unwell.
1. Wear lighter, breathable running kit
What you wear can make a big difference in the heat. Choose lightweight, breathable running clothing that helps move sweat away from the skin and allows heat to escape.
Short-sleeve tops, vests and running shorts are usually better options than heavier layers. Light colours can also be more comfortable in direct sun, as darker fabrics tend to absorb more heat.
It is also worth thinking beyond the main outfit. A lightweight running cap or hat can help protect your head and face, while a good pair of running sunglasses can reduce glare and make bright conditions more comfortable.
Do not forget sunscreen. Apply it before you run, especially if you are heading out during the day or running for longer than usual.
2. Hydrate before you start
Hydration should begin before you leave the house, not once you already feel thirsty. If you are heading out in warm conditions, make sure you have been drinking regularly throughout the day.
For longer runs, harder sessions or particularly hot days, water alone may not be enough. When you sweat, you lose both fluid and electrolytes, including sodium. Replacing these can help support hydration and reduce the risk of feeling washed out during or after your run.
Products such as electrolyte tablets, hydration powders and wider sports nutrition can be useful when training in warmer weather.
3. Carry fluids on longer or hotter runs
If you are running for more than 45 to 60 minutes in warm conditions, consider carrying fluid with you. This is especially important if your route has limited access to shops, water fountains or safe places to stop.
A handheld bottle, waist belt or hydration pack can make summer running much more manageable. You can browse our range of running water bottles and hydration options if you need a better way to carry fluids while training.
For longer sessions, you may also want to combine fluid with energy gels or other nutrition, particularly if you are training for a half marathon, marathon or endurance event.
4. Slow down and run by effort
Your normal pace will often feel harder in the heat. That is not a lack of fitness; it is a normal response to warmer conditions.
Instead of trying to force your usual pace, focus on effort. An easy run should still feel easy, even if that means running slower than normal. On very warm days, you may need to reduce your pace, shorten the run or add walking breaks.
This is especially important during intervals, tempo runs or long runs. Heat can raise your heart rate and increase fatigue, so chasing a pace target in hot conditions can quickly turn a sensible session into an unnecessarily hard one.
5. Run at cooler times of day
Timing matters. The middle of the day is usually the worst time to run during hot weather, especially when the sun is high and shade is limited.
Where possible, aim to run early in the morning or later in the evening. Morning runs are often the coolest option, while evening runs can be more manageable once the sun has dropped.
If you can only run during the day, reduce the intensity, keep the route short and choose shaded areas wherever possible.
6. Choose your route carefully
Roads, pavements and built-up areas can feel much hotter in summer because hard surfaces absorb and radiate heat. If you have the option, choose routes with shade, grass, trees or access to water.
Parks, woodland paths, coastal routes and easy trails can all feel more comfortable than exposed roads. Trail routes may also naturally encourage you to run a little slower, which can be helpful in hot conditions.
If you are moving more of your summer running off-road, make sure your footwear is suitable. Road shoes can be fine on dry, compact paths, but for uneven ground, loose surfaces or wet trails, dedicated trail running shoes will usually offer better grip and protection.
7. Use heart rate as a guide
Heat often causes your heart rate to rise at a pace that would normally feel comfortable. This is why heart rate can be a useful tool during summer training.
If you use a GPS watch or heart rate monitor, pay attention to how your body is responding rather than focusing only on speed. If your heart rate is unusually high for an easy run, slow down, take a short walk break or adjust the route.
You can view our range of running watches, GPS and heart rate monitors if you want a more structured way to monitor effort in warm weather.
8. Take breaks before you need them
Walking breaks are not a failure, especially in the heat. They are a sensible way to control effort, lower your heart rate and keep the session manageable.
If conditions are warm or humid, plan short breaks into the run from the start rather than waiting until you feel exhausted. For example, you could run for 10 minutes and walk for 1 minute, or take a short break whenever you reach a shaded area.
This approach can be especially useful for newer runners, long runs, social runs and anyone returning to training after time away.
9. Prevent chafing and blisters
Sweat increases friction, which means chafing and blisters can become more common in summer. Areas such as the underarms, inner thighs, sports bra line, waistband and nipples are particularly prone to irritation.
Using an anti-chafe product such as BodyGlide before your run can help reduce friction. Moisture-wicking clothing and well-fitted kit can also make a big difference.
Your socks matter too. Hot, sweaty feet are more likely to rub, especially if your shoes are too tight, too loose or already worn out. A good pair of technical running socks can help manage moisture and reduce friction inside the shoe.
If you are regularly getting blisters, it may also be worth reviewing your footwear. Your feet can swell slightly in the heat, so shoes that are already tight may become uncomfortable on longer summer runs. If you are unsure whether your shoes fit correctly, our gait analysis and running shoe fitting service can help you find a more suitable option.
10. Know when to stop
The most important summer running tip is knowing when to call it a day. Heat-related illness can become serious, so do not try to push through warning signs.
Stop running, move into shade and seek help if you experience:
- Dizziness or feeling faint
- Confusion or disorientation
- Nausea or vomiting
- Chills or goosebumps despite being hot
- Unusual weakness or loss of coordination
- A headache that worsens during the run
- Cramping that does not ease
Carry a phone, let someone know your route if you are running alone, and do not be afraid to cut a run short. Missing one session is always better than putting yourself at risk.
Common hot weather running problems
Heat exhaustion
Heat exhaustion can happen when the body struggles to cool itself properly. Symptoms may include heavy sweating, weakness, dizziness, headache, nausea and feeling unusually tired.
If this happens, stop exercising, move to a cooler place, sip fluids and cool the body with shade, wet towels or cold packs. If symptoms do not improve or become severe, seek medical advice.
Cramp
Cramp can be linked to fatigue, dehydration, electrolyte loss or simply pushing too hard in difficult conditions. Slowing down, drinking appropriately and using electrolytes during longer hot-weather sessions may help reduce the risk.
Chafing
Chafing is common in summer because sweat and repeated movement increase friction. Apply anti-chafe balm before running and choose smooth, breathable, well-fitted clothing.
Blisters
Blisters are often caused by friction, moisture or poor fit. Avoid cotton socks, choose technical running socks and make sure your shoes have enough room, especially on longer runs when your feet may swell.
Sunburn
Sunburn can make running uncomfortable and increases long-term skin damage risk. Use sunscreen, cover exposed skin where possible and avoid running during the strongest sun if you can.
Are there benefits to running in the heat?
Running in warmer weather can help your body gradually adapt to heat, but it needs to be done carefully. Over time, your body may become more efficient at sweating and regulating temperature, which can make warm-weather running feel more manageable.
However, heat adaptation should be gradual. Start with shorter, easier runs and build up slowly. Do not try to prove fitness by forcing hard sessions in hot conditions.
What to wear and carry for summer running
A good summer running setup does not need to be complicated. The aim is to stay cool, comfortable and prepared.
- Lightweight running clothing
- Running cap or lightweight hat
- Running sunglasses
- Bottle or hydration carrier
- Electrolyte tablets
- Sports nutrition for longer runs
- Anti-chafe balm
- Technical running socks
- A fully charged phone
Final thoughts
Summer running can be enjoyable, but it needs a sensible approach. The key is to respect the conditions. Slow down, hydrate properly, wear the right kit and choose routes that help you stay cool.
If you are preparing for a summer race, increasing your mileage or struggling with comfort in the heat, small changes can make a big difference. Better clothing, hydration, socks, anti-chafe products and correctly fitted footwear can all help your training feel more manageable.
You can browse our summer running essentials online, including running clothing, hydration bottles, sports nutrition, running socks and anti-chafe products.
If your shoes are causing discomfort, rubbing or blisters, you can also book a gait analysis with our specialist team and make sure your footwear is right for your running.
