Portsmouth faces a mixed week ahead with sunny spells and scattered showers, temperatures reaching 24°C by Thursday. Breezy conditions expected today with much cooler weather arriving Tuesday before more settled conditions return midweek.
Today’s Forecast
Temperature: High 23°C, Low 15°C
Sunrise: 05:08 | Sunset: 21:12
Portsmouth will experience changeable conditions with bright sunny intervals mixed with occasional light showers. Winds from the west-southwest will be noticeable, particularly along the seafront, with gusts reaching up to 37mph during the afternoon.
The morning starts pleasantly at 20°C, warming to a peak of 22°C by mid-afternoon. Very low chance of precipitation throughout most of the day, staying below 10%. UV levels will be moderate to high, reaching level 7 during peak hours.
High pollen levels are forecast, whilst pollution remains low. The next low tide at Old Portsmouth Beach occurs at 07:43.
Tonight
Expect a clear start to the evening with plenty of sunshine remaining. Temperatures will drop steadily from 21°C at sunset to around 17°C by midnight. Fresh westerly winds will continue, though easing slightly as the night progresses.
Tuesday’s Outlook
A dramatic change arrives with much cooler conditions. Morning sunshine will quickly give way to thickening cloud cover. Rain is likely to develop through the late morning, becoming more persistent during the afternoon with the possibility of heavy downpours and thunder.
Temperature: High 21°C, Low 15°C
Winds will strengthen considerably, with gusts potentially reaching 44mph. The unsettled weather marks a significant shift from today’s pleasant conditions.
Extended Forecast
Wednesday 16 July: High 23°C, Low 17°C
Predominantly dry with cloudy skies. Some brighter spells possible during morning hours, with light winds returning.
Thursday 17 July: High 24°C, Low 16°C
Starting cloudy with patches of light rain clearing to brighter, drier conditions during the afternoon. The warmest day of the week.
Friday 18 July: High 24°C, Low 16°C
Another pleasant day with variable cloud and sunny periods. However, heavy rain is expected to move in overnight.
Weekend: High 23°C both days, Low 15-16°C
Saturday and Sunday will see a return to unsettled conditions with increased chances of rain and showers, though still maintaining reasonable temperatures for the time of year.
Showers Clear for Sunny Afternoon
Portsmouth’s coastal location means sea breezes will be particularly noticeable today, moderating temperatures along the waterfront. Sailors and water sports enthusiasts should be aware of strengthening winds Tuesday afternoon.
The week ahead represents typical changeable British summer weather, with Portsmouth residents advised to keep both sunglasses and umbrellas handy.
