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Second heatwave expected as temperatures set to soar

Cecilia Daly
BBC News NI weather presenter
BBC WEATHER WATCHER HELEN M Crowds of people on the beach with windbreakers, tents and towels on the sand. The sky is blue with white fluffy clouds and the sea can be seen in the background as waves crash against the shore.BBC WEATHER WATCHER HELEN M
Portrush is a popular location for people to enjoy the sun

Northern Ireland is expecting a second heatwave, less than three weeks since the heatwave criteria was met for the first time this year.

Temperatures will continue to rise with increased humidity, strong sunshine (high UV levels) and high pollen levels.

The criteria for a heatwave in Northern Ireland are for somewhere to reach a temperature of 25C or more for three consecutive days.

The latest data from the Met Office forecasts temperatures to reach 25C or 26C by Friday and to rise further over the weekend.

MET OFFICE A weather graphic showing a map of the United Kingdom. There are a list of different temperatures matched against shades of pink and red. Northern Ireland and most of the rest of the UK are shaded light pink - which corresponds to 25C. Parts of the south east of England are shaded in dark red which corresponds to temperatures of 28C. The background of the graphic is a blue sky with fluffy clouds.MET OFFICE
Temperatures are expected to 25C or 26C by Friday and rise further over the weekend

Weather forecast for 12 July parades

The peak of the heat may be on Saturday when many people will be taking part in and watching the Twelfth of July parades.

The warmest Twelfth on record was in Belfast in 1983 when the thermometer hit 30.8C.

This was Northern Ireland's highest ever temperature recorded - tied with 1976 - before it was broken in July 2021 at 31.3C.

The second hottest Twelfth of July was at Thomastown, County Fermanagh, in 2013 with a top temperature of 29.1C.

BBC WEATHER WATCHER IAN A long-haired tan and brown German Shepherd type dog is standing in the sea with its pink tongue hanging out as it cools down. The beach has pebbles and stones on it and there are mountains in the background. BBC WEATHER WATCHER IAN
This dog was enjoying a cold water dip at Cultra in North Down during the last heatwave

Temperatures over the weekend are expected to reach 27C or 28C which would certainly challenge the number three spot.

The third warmest Twelfth of July was at Movanagher fish farm near Kilrea, County Londonderry, when the mercury hit 24.7C in 1999.

Many of the beaches will enjoy some very warm sunshine over the weekend though there is the risk of some sea mist patches especially in coastal areas of Down and Antrim, which should hopefully burn off quickly.

Next week, temperatures are expected to gradually drop as fresher air moves in from the Atlantic.

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