How to Hike Safely in the Heat: Summer Trail Tips

Summer hiking is glorious - long days, warm temperatures, and stunning scenery. But heat brings its own set of risks that every hiker needs to understand. From heat exhaustion to sunburn at altitude, here's how to stay safe and comfortable on the trail when temperatures rise.

Start Early, Finish Early

The golden rule of summer hiking is to be on the trail by 7–8 AM and off the exposed ridges before midday. Temperatures peak between 11 AM and 3 PM, and UV radiation is strongest at altitude. An alpine start also means you'll beat the crowds on popular routes like Snowdon and Scafell Pike.

Hydration: More Than You Think

In warm weather, you'll need significantly more water than usual. Aim for at least 500ml–1 litre per hour of hiking in hot conditions. Signs of dehydration include dark urine, headache, dizziness, and fatigue. Carry a hydration bladder for hands-free drinking and consider electrolyte tablets for longer days to replace salts lost through sweat.

Sun Protection at Altitude

UV radiation increases by around 10% for every 1,000m of altitude gained. Even on overcast days, you can burn on exposed ridges. Apply SPF 50 sunscreen to all exposed skin, wear UV-protective sunglasses, and use a wide-brimmed hat or buff to protect your neck and face.

Dress for the Heat

Lightweight, moisture-wicking clothing is essential in summer. Avoid dark colours that absorb heat and opt for light-coloured, breathable fabrics. A long-sleeved sun shirt can actually keep you cooler than a t-shirt by blocking UV while allowing airflow. Don't forget your feet - breathable, moisture-wicking hiking socks from Stride Outdoors will keep your feet cool and blister-free on long summer days.

Recognise Heat Exhaustion

Heat exhaustion occurs when your body overheats and can no longer cool itself effectively. Symptoms include heavy sweating, pale and clammy skin, weakness, nausea, and a rapid pulse. If you or someone in your group shows these signs, stop immediately, move to shade, remove excess clothing, and drink cool water. If symptoms don't improve within 30 minutes, call 999.

Heat Stroke: A Medical Emergency

Heat stroke is more serious and requires immediate emergency response. Signs include hot, dry skin (sweating stops), confusion, loss of consciousness, and a very high body temperature. Call 999 immediately and cool the person down as quickly as possible using any available means.

Plan for Afternoon Thunderstorms

Summer afternoons in the UK mountains can bring sudden thunderstorms, particularly in the Lake District, Snowdonia, and the Scottish Highlands. If you see cumulonimbus clouds building, descend from exposed ridges immediately. Never shelter under isolated trees or in cave entrances during lightning.

Adjust Your Pace

Heat significantly increases the effort required for hiking. Slow your pace by 20–30% compared to cooler conditions, take more frequent breaks in the shade, and listen to your body. There's no shame in turning back if conditions become dangerous.

Summer Kit Checklist

• 2–3 litres of water minimum
• Electrolyte tablets
• SPF 50 sunscreen
• UV sunglasses
• Wide-brimmed hat or buff
• Lightweight, breathable clothing
• Moisture-wicking hiking socks
• Emergency foil blanket
• Fully charged phone

Stay safe, stay hydrated, and enjoy the best of the British summer on the trail. Find everything you need for summer hiking at Stride Outdoors.