Cycling in the heat: 10 tips for summer riding without the struggle

The thermometer climbs, the asphalt shimmers in the distance, and your water bottle is already lukewarm before you've even left the car park. Riding a bike in extreme heat doesn't have to be a nightmare, but it needs to be prepared the day before — not the moment the first bead of sweat stings your eyes. At GravelUp, we ride all year round, and we've learned the hard way what separates a ride that turns into an ordeal from a great day on the bike that just happens to be hotter.

Here are our 10 tips, tested on the trails before being written down ⬇️

1. Read the day before you live it

Managing the heat doesn't start when you're already hot: it starts the night before, on your weather app.

• Decode the forecast like a pro: the "feels like" temperature (which factors in humidity and solar radiation) often matters more than the actual temperature. A humid 28°C (82°F) can be tougher than a dry, breezy 34°C (93°F).

• Set your schedule around the sun: head out between 6 and 7am, before the air turns into a furnace. If the ride runs long, plan a genuine break between noon and 4pm, when solar radiation peaks.

• Adapt your route: favour wooded sections, deep valleys and higher elevations, and scout water points (fountains, cafés, shops) on your GPX track ahead of time. Our guide on how to read a GPX track can help you spot these details before you set off.

2. Pre-hydrate: hydration starts before the first pedal stroke

Too often, people only think about summer cycling hydration during the ride itself. That's a mistake: a body that starts out even slightly dehydrated copes with heat far worse.

• Drink 300 to 500 ml of water in the hour before departure, in small sips.

• A slightly salty breakfast helps your body hold onto that water rather than flushing it out immediately.

• Check your urine colour the evening before and again the morning of your ride: pale, almost clear yellow is the sign you're starting well hydrated.

3. Drink smart during the ride (not just water)

Drinking matters — but so does what, when, and how much. On a long hot ride, plain water alone can actually become a trap.

• Watch out for hyponatremia: drinking large amounts of plain water without sodium dilutes your blood and can cause serious symptoms. It's the mirror-image problem of the sugar crash — too much water instead of too much sugar — but just as dangerous, as we explain in our article on the "pure sugar" nutrition mistake: in both cases, it's balance that's missing, not good intentions.

• The summer electrolyte rule: on any ride over 2 hours in the heat, add an electrolyte tablet or powder to one of your bottles. Our full breakdown of mineral and carbohydrate intake is covered in our dedicated article on cycling nutrition.

• Drink before you're thirsty, every 15 to 20 minutes, in small amounts rather than occasional big gulps.

• Think local and smart : cool spring water from a village fountain, salted tomato juice... these naturally mineral-rich drinks are excellent alternatives to sports drinks when you're touring across France.

4. Recognize the warning signs of heatstroke

Preventing heatstroke means actively listening to your body — especially when the excitement of the ride masks rising fatigue.

• Very dark urine despite seemingly good hydration: a sign of dehydration.

• Headaches, mild dizziness, unusual cramps: these are early warning signs, not details to shrug off.

• Chills in the middle of the heat, or sweating that suddenly stops: this is a more serious sign that should push you to stop immediately, find shade, and cool down without delay.

5. Bet on the right fabrics: your outfit is a performance variable

What you wear isn't just an aesthetic detail — it's a real lever for thermal comfort. Choosing the right summer gravel clothing genuinely changes the game on a multi-hour ride.

• Technical fabrics vs. cotton: cotton absorbs sweat and holds it against your skin, which cools you at first… then irritates and weighs you down over time. A technical jersey wicks moisture away and dries fast, even when soaked.

• Helmet ventilation: with a well-ventilated model, the comfort difference on climbs in the heat is immediately noticeable.

• For a full breakdown of which layers to pick by season, check out our guide on what to wear for gravel riding.

6. Don't forget the overlooked spots for sun protection

Almost everyone thinks of sunscreen for their face. On the hands and forearms resting on the handlebars all day? Much less so.

• Reapply sunscreen to the back of your hands and forearms every two hours: these are the most continuously exposed areas, and often the great forgotten spots for late-season sunburn.

• UV sleeves, an accessory that seems counterintuitive in extreme heat, are actually remarkably effective: they block UV rays while still letting air circulate — unlike a thick layer of cream.

7. Invest in the cold: a handlebar cooler or insulated bottle

A small luxury that changes a big part of the ride: an insulated bottle or handlebar cooler keeps your drink cold for hours instead of turning it into warm tea after the first climb. On long gravel tours, this small detail often makes the difference between "I drink regularly" and "I keep putting off drinking because it's disgusting

8. Chamois cream: your anti-friction ally in summer

Heat, sweat, and accumulated salt multiply friction on the saddle. A good chamois cream, applied before every long ride, significantly reduces the irritation that appears faster once your skin stays damp for hours on end.

• Apply generously to contact areas before you set off, and reapply if the ride exceeds 3-4 hours or if you've stopped to cool down (water rinses away part of the protection).

• Combined with quality bib shorts and a saddle suited to your anatomy, this is one of the best comfort investments you can make for summer. We break down the full anti-pain strategy in our article on

  how to take care of your rear-end on a multiday bike trip, and more broadly in our guide to riding gravel in total comfort.

9. Slow down: lowering your intensity isn't weakness

In extreme heat, your body is already working hard to regulate its temperature — your heart pumps more blood to the skin to dissipate heat, on top of the usual muscular effort. The result: at the same intensity, your heart rate climbs faster, and your perceived effort is higher than on a mild day.

• Accept lowering your intensity by 10 to 15% compared to a normal ride. This isn't giving up — it's adapting your strategy to the day's weather.

• The midday break between noon and 4pm isn't surrender — it's what cyclists across southern Europe have always done. Make it a pleasure rather than a constraint: shade on a terrace, a short nap, and pick the ride back up in the late afternoon when the light turns golden again.

10. After the ride: recover from the heat, not just the ride

Thermal fatigue adds to muscular fatigue, and recovery needs to account for both if you want to feel good the next day.

• Actively bring your core temperature back down: a cool shower (not ice-cold, to avoid thermal shock), shade, a fan. The goal is a gradual decrease, not a sudden shock.

• Your evening meal should stay light and mineral-rich rather than heavy and fatty, to help your body replace the salts lost during the day.

• Sleep matters double in summer: a room that's too hot compromises recovery quality, even after a great ride. Our detailed tips for optimizing this key phase are in our article on how to recover well after a bike ride.

Our summer territories: riding where it's (a little) less hot

Certain mountain ranges naturally offer cooler conditions in midsummer, thanks to altitude, forests, and windy coastlines. If a heatwave has put you off the idea of riding in the lowlands in July, here are a few of our playgrounds that are especially well suited:

• The Vosges: dense forests, moderate altitude, and shaded woodland along much of the routes.

• The Morvan: a cooler climate, forest tracks, and lakes for a refreshing break.

• The Swiss Alps: altitude naturally brings the temperature down, even in peak summer.

• Brittany: the Atlantic wind and milder coastal temperatures completely change the game.

• The Basque country: mountainous terrain and proximity to the ocean for cooler rides.

• The Pyrenees: high mountains and cool nights, the winning combo for making the most of summer.

• Norway: a mild, temperate climate, plus endless summer days in the middle of stunning landscapes.

Find all our summer destinations on our calendar page.

FAQ: cycling in extreme heat

At what temperature should you avoid riding altogether?
Above a "feels like" temperature of 33-35°C (91-95°F), especially with high humidity, it's safer to shift your ride to early morning or late afternoon rather than riding during the hottest hours.

Should you change your tire pressure in summer?
Heat slightly increases pressure inside your tires. In extreme heat, you can adjust your usual pressure by 0.1 to 0.2 bar, as explained in our article on summer gravel tires for dry terrain.

How long before departure should you start hydrating?
Ideally, increase your water intake starting the evening before, and top up with 300 to 500 ml in the hour before you leave.

Want to put these tips into practice, on terrain that's a world away from the tarmac furnace? Discover our gravel trips in regions designed for riding well, even in summer.