Portsmouth Weather Forecast, Hampshire PO2 8

Today 12 Jul London and South East England

After a very mild night, any early cloud will soon clear to give widely sunny conditions across the region. Another hot day although developing onshore breezes will give cooler temperatures near coasts. Maximum Temperature 31C.

Tonight 12 Jul London and South East England

Remaining fine throughout Saturday evening with skies staying largely clear. Some coastal low cloud and fog may push inland to affect parts of Kent and Essex overnight. Very mild. Minimum Temperature 17C.

Sun 13 Jul London and South East England

Sunny spells Sunday, though cloudier than of late. Whilst still hot or very warm, temperatures will be notably cooler across the east of the region with the fresh onshore breeze. Maximum Temperature 30C.

Mon 14 Jul London and South East England

Generally trending cooler, breezier, and more unsettled. Bands of showery rain moving northeast Monday, perhaps heavy at times. Variable cloud Tuesday and Wednesday with showers or longer spells of rain.

Tue 15 Jul London and South East England

Generally trending cooler, breezier, and more unsettled. Bands of showery rain moving northeast Monday, perhaps heavy at times. Variable cloud Tuesday and Wednesday with showers or longer spells of rain.

Wed 16 Jul London and South East England

Generally trending cooler, breezier, and more unsettled. Bands of showery rain moving northeast Monday, perhaps heavy at times. Variable cloud Tuesday and Wednesday with showers or longer spells of rain.

Thu 17 Jul London and South East England

Changeable weather conditions are expected across the UK during this forecast period. Periods of fine and dry weather are expected at times. These settled spells could persist for several days at a time and are likely to be accompanied by plenty of sunshine. Interspersed with this will be cloudier, more unsettled intervals which will bring some showers or longer spells of persistent rainfall. Some of the rainfall is likely to be heavy in places, with a risk thunderstorms at times as well. Temperatures are expected to be above normal for the majority of the UK throughout this period. Some hot conditions are likely to develop at times, particularly in southern and eastern areas of the UK.

Fri 18 Jul London and South East England

Changeable weather conditions are expected across the UK during this forecast period. Periods of fine and dry weather are expected at times. These settled spells could persist for several days at a time and are likely to be accompanied by plenty of sunshine. Interspersed with this will be cloudier, more unsettled intervals which will bring some showers or longer spells of persistent rainfall. Some of the rainfall is likely to be heavy in places, with a risk thunderstorms at times as well. Temperatures are expected to be above normal for the majority of the UK throughout this period. Some hot conditions are likely to develop at times, particularly in southern and eastern areas of the UK.

Portsmouth Weather Forecast

Today 12 Jul London and South East England

Tonight 12 Jul London and South East England

Sun 13 Jul London and South East England

Mon 14 Jul London and South East England

Tue 15 Jul London and South East England

Wed 16 Jul London and South East England

Thu 17 Jul London and South East England

Fri 18 Jul London and South East England

Temperature Forecast Met Office

Temperature Real-Time

Dean Hill (Wiltshire) Radar

National Satellite

National Synoptic

Portsmouth Temperature Statistics

July Temperature

Thorney Island (11km)

Lowest 4 January, 2025

Average 2025

Highest 1 July, 2025

Lowest 8 June, 2025

Average June

Highest 21 June, 2025

Lowest 3 July, 2025

Average July

Highest 1 July, 2025

Climate (2020–Present)

Thorney Island (11km)

Average Low 2020–2025

Average 2020–2025

Average High 2020–2025