TEMPERATURES could rise to 30C as early as next week, the Met Office said.
Brits are set to bask in 20Cs in the coming days, after a "brief, less settled, interlude" on Friday and Saturday.
And some areas could see temperatures hit 30C though overnight it will be cooler, the forecaster said.
A Met Office spokesperson said: “After a brief, less settled, interlude on Friday and Saturday, fine conditions will return by Sunday and into next week. For much of the UK this will be accompanied by a boost in temperatures with many places reaching the mid-20°Cs by the middle of next week.
"Some central and southern areas are likely to see temperatures approaching the values needed for heatwave conditions. Heatwave conditions need to remain in situ for three consecutive days, and by the middle of next week it is possible that some parts of the UK could be reaching heatwave thresholds.
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“However, whether or not everyone experiences heatwave thresholds, the majority of the UK will experience the finest conditions and highest temperatures so far this year.”
As temperatures soar, the Met Office also shared guidance from the RNLI on how to stay safe on beaches.
Samantha Hughes, National Water Safety Partner at the RNLI said: “The forecasted warm weather will mean we’ll see more visitors at the coast and we always want people to enjoy themselves safely.
“Entering the water during warm weather can increase the risk of cold water shock due to the sudden changes in skin temperatures. Enter the water gradually and avoid jumping or diving straight in to reduce your risk of cold-water shock.
“If you’re planning on heading to the beach, we highly recommend you visit one that is lifeguarded and you swim between the red and yellow flags. This is the safest area and is most closely monitored by lifeguards.
“If you get into trouble in the water, Float to Live. Tilt your head back with ears submerged and try to relax and control your breathing. Use your hands to help you stay afloat and then call for help or swim to safety if you can.
“In an emergency at the coast, call 999 or 112 and ask for the Coastguard or ask for the fire service if you are near inland waters.”
Brits already enjoyed a taste of much welcomed summer at Royal Ascot this week.
Glamourous guests donned vibrant dresses and fascinators while some looked suave in sophisticated suits.
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Others revelled in the warmth last night to celebrate the summer solstice on beaches across the UK.
And, sun lovers are sure to hit parks and coastal resorts.
