A WEATHER forecaster has warned festival-goers to bring sun hats and wellies - with sun AND thunderstorms on the cards.

James Carter, 29, has warned the weather for Glastonbury Festival is likely to be very mixed - and attendees of the famous event should prepare accordingly.

James, from Worle, Weston-super-Mare, has done online courses so he can make his own weather forecasts.

He studies a variety of mapping systems for pressure patterns, temperature and wind speeds and interprets the data to form a forecast.

He said the event - taking place from 26 to 30 July - at Worthy Farm, just outside the village of Pilton in Somerset, is likely to see some hot weather for the first few days.

But late on Friday or early Saturday, he said the weather will turn - going from high-twenties sun and tropical showers to low-twenties and rain.

Weather forecaster James.Weather forecaster James. (Image: SWNS)

James said: "It's not looking to be really cold or particularly severe winds, but cooler and breezier towards the end of the weekend.

"The biggest issue will be the rain - make sure you have your coat as well as your shorts!"

James said the weather will be "unsettled" over the course of the festival - with a warm and humid start, and the potential for tropical storms.

It will turn cool half way through the festival due to a north-westerly wind, which will bring a cooler breeze and more rain.

Read more: Five tips for Glastonbury Festival first-timers

He warned after the cooler weather comes, the downpours could be particularly "heavy" across the West - including on the thousands of festival-goers at Worthy Farm.

But the cooler breezes towards the end of the weekend may come as a "relief" from the humid start to the festival, he said.

James added: "I'd say pack everything - shorts, suncream and umbrella - so you're prepared!"