Thundery showers have been forecast to hit Glastonbury the day before the festival starts.
The weather forecast for Pilton for the rest of this week looks mostly promising, with sunny and dry conditions aside from a couple of hours of heavy rain later today (June 20).
But forecasters say there's a chance of heavy and thundery rain during the build-up to this year's festival.
BBC weather predicts light rain and a gentle breeze on Monday (June 24) followed by an entire day of thundery showers on Tuesday (June 25) - the day before the festival starts.
The Met Office also says there's a chance of thundery rain on the weekend before Glastonbury kicks off.
"For Saturday and the start of Sunday it will be sunny and warm. It will turn unsettled later on Sunday and Monday, with some heavy, possibly thundery, rain," the forecast says.
In its long-range forecast however, the weather agency adds the rain may give way to more festival-friendly weather.
"As we approach the end of June there may be more in the way of dry and settled weather, with temperatures mostly near normal," it says.
