Home
Weather London
WeatherRadar
RainfallRadar
TemperatureRadar
WindRadar
LightningRadar
Weather News
Editor's Pick
Discover the app
Weather widget
Contact us
Apps
Career
Home / Editor's Pick /

Summer solstice: Longest day of the year is here

07:00
21 June 2025

Summer solstice
Longest day of the year is here

summer solstice© Shutterstock

Today we mark the summer solstice, the longest day of the year, signalling the start of astronomical summer.

A solstice occurs when one of Earth’s pole reaches its maximum tilt towards the Sun. For those of us in the Northern Hemisphere, it will be the longest of the year, but for those in the Southern Hemisphere, it’s the opposite.

On the summer solstice, the sun travels its longest path after rising, reaching its northernmost point. The precise time of the summer solstice on June 21st is at 03:42 am.

The summer solstice is over 9 hours longer in daylight length than the winter solstice! Make sure you make the most of the additional daylight!

Hottest solstice ever?

In the midst of a heatwave, temperatures are expected to reach up to 33°C. The hottest solstice on record was in 2017 with a high of 34.5°C.

The sun is also at its strongest on the solstice, which means you need to take extra precaution in the sun, especially as the UV Index is forecast to reach high levels across some parts of England and Wales.

Check out the UV Index hereread more

While meteorological summer began on June 1st, and will last until August 31st, astronomical summer relies on the tilt of the Earth and its rotational axis, which will end on September 22nd, when the autumn equinox then occurs.

Ryan Hathaway
More on the topic
Split map of Ireland showing widespread rain in blue on the left and strong winds in orange on the right, with warning icons for heavy rain and gusty conditions up to 45 mph.
Thursday, 9 April 2026

Wet and windy for Ireland

Weather warnings as fresh low arrives
A green, rolling landscape after rain. Alongside it, a weather map showing a low-pressure system. Indications of further rainfall.
Wednesday, 8 April 2026

New low approaching

Morocco bursting to life after rain
Split UK map showing warm orange temperatures up to 26 degrees on the left transitioning to cooler green tones around 3 to 5 degrees on the right, with an arrow indicating change.
Wednesday, 8 April 2026

A quick shift

High of the year to a cooler spell
All weather news
This might also interest you
Weather map of the UK and Ireland showing scattered showers with cloudy patches across much of the region, especially around western and northern areas. Sunshine symbols appear over London, Cardiff, and parts of southern England, while temperatures range from 17°C to 18°C in most places. Areas of heavier rain are visible over the Atlantic to the west.
Friday, 29 August 2025

Breakfast brief

Unsettled conditions into the weekend
Weather graphic showing rain and wind fields over the Canary Islands and a central warning symbol.
Friday, 12 December 2025

Storm and rain

Turbulent weather in the Canary Islands
Outline of Santa Claus with a yellow and white hat, "Ho-Ho-Ho" next to the outline above a Christmas tree.
Thursday, 25 December 2025

Merry Christmas!

Wishes from Weather & Radar
All articles
Weather & Radar

Weather & Radar is also available on

Google Play StoreApp Store

Company

Contact us Privacy Policy Legal info Accessibility statement

Services

Uploader

Socials

facebooktwittertikToklinkList