Temperatures could reach a sizzling 30°C over the Bank Holiday weekend before the remnants of Hurricane Erin bring wind, rain and big waves to the coast.
Warm and sunny spells are expected over the weekend, hitting a peak on Monday, before Erin brings more unsettled weather, the Met Office said.
The Royal National Lifeboat Institution (RNLI) is urging people to go to a lifeguarded beach where possible and beware of rough seas.
Craig Snell, Met Office meteorologist, said: “It’s looking fairly fair, it’s going to turn increasingly warm, the warmest day is going to be Monday.
“Each day there will be more sunshine developing.”
Saturday will be a mix of cloud and sunshine, with some showers breaking out in Northern Ireland, western parts of Scotland and north-west England, the forecaster