The short answer: dress in layers you can add and remove, carry a waterproof and a warm layer with you even on a hot day, drink water constantly, and insulate from the ground at night. British festival weather routinely swings 20 degrees between mid-afternoon and 4am, and almost everyone underestimates the second half of that.
The defining feature of a UK festival isn't rain – it's variability. You can genuinely need sun cream and a fleece on the same day, and people who pack for only one scenario have a much harder weekend.
The layering system
Forget individual outfits and think in three layers you can mix through the day:
- Base: a t-shirt or thin long-sleeve. Synthetic or merino dries far faster than cotton, which matters more than it sounds.
- Mid: a hoodie or fleece. This is the layer that saves your evening.
- Shell: a proper waterproof with a hood, packed small and carried always.
The mistake is leaving the mid and shell layers in the tent on a sunny morning. You will be half a mile away when the temperature drops at 9pm. Carry them.
When it's hot
UK festivals now regularly see 28–32°C, and a field with no shade at midday is genuinely dangerous for anyone drinking and dancing.
- Water, constantly. Refill at every free point you pass. Aim for a bottle every couple of hours, more if you're drinking alcohol.
- Add salt. Water alone isn't enough if you're sweating heavily. Salty snacks or an electrolyte tablet make a real difference.
- Sun cream factor 30+, reapplied. Once in the morning is not enough for a twelve-hour day. Ears, neck, feet in sandals and the parting in your hair are where people burn.
- A hat and sunglasses.
- Find shade in the middle of the day. A tent in direct sun is hotter than outside it, so shade means a tree, a marquee or a covered stage, not your own tent.
- Wet a bandana or a cap and put it back on. It's the cheapest air conditioning there is.
- Pace the drinking. Alcohol in heat dehydrates fast and heat exhaustion sneaks up on people.
Know the warning signs of heat exhaustion: headache, dizziness, feeling sick, cramps, clammy skin, confusion. Get into shade, drink water, cool down, and go to the medical tent if it doesn't improve within half an hour.
When it's cold
Clear nights are the cold ones. A cloudless day at 26°C can be followed by 7°C at 4am, and cold at night is what ruins more festivals than rain does.
- Insulate from the ground. A roll mat matters more than a thicker sleeping bag.
- Hat, dry socks, dry base layer to sleep in.
- Eat before bed.
- A hot drink from a flask or a food stall on the walk back.
- Don't sleep in damp clothes, however tired you are.
- Take a blanket. Cheap, warm, doubles as something to sit on during the day.
When it rains
- A poncho over a waterproof jacket keeps your bag and legs dry too, and packs down to nothing. Umbrellas are banned in most arenas.
- Wellies plus thick socks and an insole. Wellies alone will give you blisters within a day.
- Dry bags or freezer bags for phone, charger, cash and one dry outfit.
- Waterproof trousers are unglamorous and transform a wet day.
- Get inside a tented stage and see something you hadn't planned to. Rain is when festivals are at their most sociable.
Mud management
Once the ground goes, walking takes twice the energy and everything you own gets coated. Keep boots in the porch, keep one outfit permanently dry and sealed, and don't fight it – a festival in mud is a rite of passage and there is nothing to be done except own a good pair of wellies.
A weather-proof kit list
- Waterproof jacket with a hood
- Poncho
- Fleece or hoodie
- Wellies and thick socks × 4
- Sun cream factor 30+, hat, sunglasses
- Beanie for the evening
- Refillable water bottle
- Electrolyte tablets
- Blanket
- Dry bags or freezer bags
- Roll mat
Check the forecast — but don't trust it too far
Look at the forecast the week before to get a general sense, then again the night before you travel. Beyond three days, UK forecasts for a specific rural site are indicative at best. Pack for both outcomes regardless of what it says, because the cost of being wrong in one direction is a warm weekend carrying a fleece you didn't need, and in the other direction is a miserable one.
Frequently asked questions
How cold does it actually get at a UK festival at night?
Commonly 6–10°C in mid-summer, and lower on clear nights or at altitude. Plan for single figures.
Do I really need wellies if the forecast is dry?
Take them. Ground that has had rain the previous week is still soft, and a single overnight downpour changes everything.
Is sun cream allowed in the arena?
Yes, though aerosols are restricted at some events. Take a non-glass bottle.
What's the best way to dry wet clothes?
You mostly can't. Hang them in the porch or on a guy line in the sun, and rely on having a sealed dry set in reserve.
