Residents in Portsmouth can expect a week of mild and settled weather, though a noticeable temperature drop is expected by the middle of the week. According to the Met Office, the city will experience a mix of sunny intervals and cloud cover through 10 May 2026.
Monday 4 May is set to be the warmest day of the week, with temperatures reaching 19°C. However, a cooler northerly breeze will arrive on Tuesday night, causing temperatures to dip to 15°C by Wednesday 6 May. During this cooler period, residents should be aware that the Met Office warns that patchy overnight rural grass frost is possible on Wednesday morning, with night-time temperatures potentially falling to 6°C.
Conditions are expected to improve towards the end of the week. Temperatures will climb back to between 17°C and 18°C from Friday 8 May through the weekend. While the week remains generally mild, wind gusts will strengthen midweek, reaching 21-22 mph on Tuesday and Wednesday, and increasing up to 24 mph by Saturday 9 May.
Those planning outdoor activities will benefit from low pollen and low air pollution levels throughout the week. Residents may want to keep a light jacket handy for the midweek period when temperatures are at their lowest.
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