Ibiza reached only 23C on Sunday, and Mallorca 25C.
Temperatures on Saturday reached 27.6C in Heathrow in west London, making it the hottest day of the year at that point, and way above the 19C-20C average for June.
But the Weybourne high exceeded it, and the prolonged sun sent people flocking to parks and beaches in the south.
And things will turn even more unappealing in the coming hours, as unseasonably windy weather hits Northern Ireland and western Scotland, forecasters say.
“There could even be some gales on the coasts and over the hills,” said Emma Smith, of the Met Office.
The weather is expected to be unsettled and cool most of the coming week – until more a more summery feel returns the following week.
On Monday winds are likely to be disruptive, with gusts of up to 35mph, Ms Smith warned.
The Met Office predicts the coming days will remain unsettled with both sunny spells and showers that could be heavy and thundery in places. Longer spells of rain and stronger winds are possible at times.
Ms Smith said nights would be colder with a few parts even having frosts. Temperatures were likely to be around 20C on Wednesday and 21 to 22C on Thursday, although thundery showers could return then.
Even into next weekend it will be cool and unsettled but high pressure out to the west the following week could bring warmer weather, according to BBC forecaster Nick Miller.
The Met Office says: “During the third week of June it is likely that generally drier and mostly settled conditions will have become established across the UK.”
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