How to Keep Your Tent Cool in Summer

A tent gets hot for one reason: it works like a greenhouse. Sunlight passes through the fabric, warms everything inside, and the heat cannot get back out fast enough. By 8am on a clear summer morning a tent in direct sun can be 10 to 15°C hotter than the air outside, which is why you wake up cooking. The fix is not a gadget, it is where you pitch and how much air you let move through.

Get four things right and the tent stays liveable: shade, ventilation, a light-coloured flysheet, and being out of it before it heats up. This is part of our guide to camping in British weather, season by season, and it sits alongside the campsite listings on Camping Sites in Britain.

This page is about keeping the tent itself cool. For keeping yourself and the whole trip bearable in a proper heatwave, drinking, sleeping, staying in the shade, read our companion guide to staying cool in a heatwave.

Why a tent turns into an oven

It is the greenhouse effect, and it is worst in direct morning sun. Short-wave sunlight passes straight through the flysheet and inner, hits the groundsheet, your kit and the tent walls, and turns into heat. That heat radiates back as longer wavelengths the fabric does not let through as easily, so it builds up inside faster than it escapes. Add still air and no shade and the temperature climbs quickly.

Morning is the danger window. The sun is low and strikes the side of the tent full-on, and the fabric has cooled overnight so the contrast is sharp. A tent that felt fine at dawn can be unbearable by 8am. Direct sun on the flysheet is the single biggest factor, which is why almost everything below is about keeping the sun off the tent or moving air through it.

Pitch for shade, and think about the morning

The best cooling trick is free: pitch where the sun will not hit the tent early. Shade beats every fan, tarp and vent going, because it stops the heat before it starts.

• Under trees is ideal where the site allows it. Dappled shade keeps the flysheet cool through the day and the ground under a canopy stays cooler too. Check for dead branches overhead first.
• On the west side of a hedge, wall, building or bank you get morning shade, which is what matters most. The obstacle blocks the low early sun, and by the time the sun swings round in the afternoon you are usually up and about anyway.
• Orient the door to the breeze. Point the main door and the largest mesh panel into the prevailing wind so air is pushed through the tent rather than around it. On most British sites that means facing roughly south-west, but read the flags, trees and other tents on the day.

Avoid pitching in the open middle of a field in full sun if you have any choice. Choosing the pitch well is half the battle, and our guide to choosing the best location for your tent goes further on ground, slope and shelter.

Open everything and move air through

A tent cools when air flows through it, so open every vent, door and mesh panel you have. Trapped air is the enemy; a through-draught carries heat away and stops the stuffy, airless feeling that makes a warm tent feel worse than it is.

Open vents at both a high and a low point so warm air can rise and escape at the top while cooler air is drawn in low down. Unzip the flysheet doors back to the mesh so bugs stay out and air still moves. Where the design allows, roll up or peg out the lower edges of the flysheet to lift it off the ground and let air scoop underneath and up through the tent. Two opposite doors open at once gives you proper cross-ventilation, which is far better than one.

Flysheet colour matters more than you would think

A light-coloured or reflective flysheet stays noticeably cooler than a dark one. Pale fabric reflects sunlight away; dark fabric absorbs it and radiates that heat straight into the tent. If you are buying a tent to use in summer, a cream, silver, light grey or pale green flysheet will beat a dark blue or black one on a hot day, every time.

If you already own a dark tent, you cannot repaint it, so put something reflective between it and the sun instead. That is where a tarp comes in.

Rig a reflective tarp or sunshade above the tent

Pitching a tarp or reflective sunshade a foot or so above the flysheet breaks the sun before it ever reaches the tent, and it is the most effective add-on there is. The gap is the point: the tarp takes the heat, air flows through the space between, and the flysheet underneath sits in shade.

A silver-backed or aluminised sunshade reflects the most heat, but any light tarp pitched high and taut helps. Use trekking poles, nearby trees or the car to hold it well clear of the tent rather than resting on it, and angle it to cover the side facing the morning sun. On an exposed pitch this alone can knock the inside temperature down by several degrees.

Take the inner down in the day

On a scorching day, drop the sleeping inner and leave just the flysheet standing. The inner is where you sleep, and it does not need to bake in the sun all afternoon soaking up heat. With only the flysheet up you get shade over your pitch without a sealed hot box sitting in the middle of it, and the inner stays cooler for bedtime. Re-clip it in the evening once the sun is off the tent.

A 12V fan earns its place on hook-up

If you have an electric hook-up, a small 12V or mains fan makes a real difference. It will not chill the air, but moving air feels cooler on the skin and, more importantly, it keeps a draught going through the tent when the evening turns still and the natural breeze drops. Set it low, pointing across the sleeping area or out of a vent to push warm air out, and it will help you drop off on a muggy night. Plenty of sites across the UK offer hook-up pitches; you can filter for them in the campsite listings.

Get up before the tent heats up

The simplest tactic of all: be out of the tent before the sun gets to work on it. Once the tent is in direct morning sun there is very little you can do to keep it cool, so the answer is not to be lying in it. Get up early, roll the doors back to air the tent while you make breakfast, and spend the hot part of the morning outside in the shade or down at the beach. An early start on a hot day is a pleasure anyway, and the light is better.

The good news is that a tent cools fast once the sun comes off it. As the evening shade arrives the fabric loses its heat quickly, and a tent that was an oven at midday is usually comfortable again well before bedtime. The heat is a daytime problem, not a night-time one, so you rarely have to sleep in it.

Frequently asked questions

Why does my tent get so hot in the morning?

The greenhouse effect. Sunlight passes through the fabric and heats everything inside faster than the heat can escape. Low morning sun strikes the side of the tent full-on, so a tent that felt fine at dawn can be baking by 8am if it is pitched in the open.

What colour tent stays coolest in summer?

A light or reflective one. Cream, silver, light grey and pale green flysheets reflect sunlight and stay cooler, while dark blue and black fabric absorbs heat and radiates it inside. If you camp mainly in summer, choose a pale flysheet.

Does a tarp over a tent actually keep it cooler?

Yes, and it is the best add-on there is. A tarp or reflective sunshade pitched a foot above the flysheet takes the sun before it reaches the tent, and air flowing through the gap keeps the flysheet in shade. It can drop the inside by several degrees.

How do I get air moving through my tent?

Open vents high and low, unzip both doors to the mesh for cross-ventilation, and roll up the flysheet edges where the design allows so air scoops underneath. A through-draught carries heat away far better than a single open door.

Is a battery or 12V fan worth taking camping?

On an electric hook-up, yes. A fan will not cool the air but moving air feels cooler and keeps a draught going once the evening breeze drops. Point it across the sleeping area or out of a vent to push warm air out.

Does a tent cool down at night?

Quickly, once the sun is off it. Tent fabric loses heat fast in the evening shade, so a tent that was unbearable at midday is usually comfortable again well before bedtime. Tent heat is a daytime problem, not a night-time one.

The short version

Pitch in shade or on the west side of something so the tent gets morning shade, open every vent and door to move air through, and put a light flysheet or a reflective tarp between the sun and the tent. Then get up early and be out of it before it heats up.

Heat is only half of British summer camping. For the wet half see camping in wet weather, for cold nights see how to stay warm at night, and find your next pitch in the campsite listings.