Portsmouth weather is set for a mild and bright Thursday, with sunny intervals and a high of 14°C, before rain moves in on Friday afternoon, according to the latest Met Office forecast updated at 10:38am on 5 March 2026.
Today’s Conditions
Temperatures this afternoon will reach 14°C, though the south-easterly breeze — gusting up to 16mph — will make it feel closer to 11°C. There is a 20% chance of rain at around 1pm, but conditions are expected to remain largely dry. Humidity will be elevated, reaching a daily high of 91%, while UV levels are low and visibility is very good at up to 27km. Air pollution levels are classed as moderate — suitable for normal outdoor activities. Sunrise was at 6:41am, with sunset due at 5:52pm.
Friday Brings Rain
Residents should prepare for a noticeably wetter Friday. Rain chances climb sharply through the morning, reaching 70–80% by the afternoon and into the evening. Temperatures will peak at 13°C, with overnight lows of 9°C, and winds will remain gentle at around 6–7mph throughout the day.
Weekend Outlook
Saturday will be largely cloudy but dry, with the possibility of bright spells breaking through in the late afternoon. Temperatures will again reach 14°C, with lows of 7°C overnight. Sunday is expected to be the mildest day of the forecast period, with a high of 15°C and a chance of sunshine developing later in the day. Rain chances remain very low across the weekend.
Into Next Week
Monday will bring variable cloud and sunny spells, with highs of 13°C and a slight chance of showers developing in the afternoon. Conditions are expected to turn windier by Wednesday, with gusts potentially reaching 24mph and a 30% chance of rain through the morning. Temperatures will hold steady at around 12°C, with overnight lows of 9°C.
