Portsmouth News

Portsmouth weather today

Current conditions, the next 24 hours, the week ahead, wind on the Solent, tide times for Portsmouth Harbour and any Environment Agency flood alerts, refreshed every 30 minutes.

15°CPartly cloudy

Feels like 14°C. Today 12° to 18°. Wind W 5 mph, gusting 8 mph (force 2, light breeze). Humidity 75%, pressure 1017 mb. Sunrise 07:44, sunset 20:11, UV max 3.

Updated 09:31, 18 September 2026.

No Environment Agency flood alerts or warnings are in force within 15 km of Portsmouth.

Next 24 hours

TimeWeatherTempRain chanceRainWindGusts
Fri 10:00Partly cloudy14°0%0 mmW 48
Fri 11:00Overcast16°0%0 mmWSW 510
Fri 12:00Overcast17°0%0 mmWSW 918
Fri 13:00Overcast18°0%0 mmWSW 1223
Fri 14:00Overcast18°0%0 mmWSW 1326
Fri 15:00Partly cloudy18°0%0 mmWSW 1528
Fri 16:00Partly cloudy18°0%0 mmWSW 1732
Fri 17:00Overcast18°0%0 mmWSW 1732
Fri 18:00Overcast18°0%0 mmWSW 1732
Fri 19:00Overcast18°0%0 mmWSW 1630
Fri 20:00Light drizzle17°0%0.1 mmWSW 1529
Fri 21:00Overcast17°3%0 mmWSW 1426
Fri 22:00Clear17°8%0 mmWSW 1325
Fri 23:00Overcast18°10%0 mmWSW 1426
Sat 00:00Overcast18°8%0 mmWSW 1325
Sat 01:00Overcast18°3%0 mmWSW 1426
Sat 02:00Overcast18°0%0 mmWSW 1426
Sat 03:00Overcast18°0%0 mmWSW 1427
Sat 04:00Overcast18°0%0 mmWSW 1426
Sat 05:00Overcast18°0%0 mmWSW 1326
Sat 06:00Overcast18°1%0 mmWSW 1325
Sat 07:00Overcast18°2%0 mmWSW 1427
Sat 08:00Overcast18°4%0 mmWSW 1427
Sat 09:00Partly cloudy18°7%0 mmWSW 1426

Seven-day forecast

DayWeatherHighLowRainChanceWind maxSunriseSunset
Fri 18 SepLight drizzle18°12°0.1 mm10%WSW 1707:4420:11
Sat 19 SepLight drizzle20°18°0.1 mm12%WSW 1907:4520:09
Sun 20 SepOvercast18°14°0 mm10%WNW 1107:4720:07
Mon 21 SepPartly cloudy21°10°0 mm0%WNW 507:4820:05
Tue 22 SepPartly cloudy21°13°0 mm0%WSW 307:5020:02
Wed 23 SepOvercast19°14°0 mm4%NNW 1407:5120:00
Thu 24 SepOvercast18°12°0 mm0%SSE 1207:5319:58

Sea conditions

Solent off Southsea: sea temperature 18.9°C, waves 0.28 m from the SW, period 3 s.

Air quality and pollen

Air quality Fair (European AQI 25). PM2.5 7.3, PM10 17.5, NO₂ 10.9, ozone 54 µg/m³. Pollen: grass low, birch low.

This month so far

September so far in Portsmouth (17 days): 31.2 mm of rain on 4 wet days, average high 20.8°C. Warmest day 23°C on 6 Sep, coldest night 12°C on 10 Sep.

Portsmouth weather forecasts, local conditions and travel warnings. Get accurate weather updates for Hampshire's south coast city.

Data: Open-Meteo (forecast, air quality, marine), Environment Agency (flood alerts), UK Hydrographic Office (tides). Forecasts are model output; in severe weather follow Met Office warnings.