Portsmouth News
Mon 14 Sep 19°C overcast

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.

19°COvercast

Feels like 20°C. Today 19° to 20°. Wind SW 7 mph, gusting 14 mph (force 3, gentle breeze). Humidity 89%, pressure 1021 mb. Sunrise 07:37, sunset 20:20, UV max 2.

Updated 21:02, 14 September 2026.

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

Next 24 hours

TimeWeatherTempRain chanceRainWindGusts
Mon 22:00Overcast19°0%0 mmSW 714
Mon 23:00Overcast19°0%0 mmWSW 712
Tue 00:00Overcast19°0%0 mmWSW 612
Tue 01:00Overcast19°0%0 mmSW 511
Tue 02:00Overcast19°0%0 mmSW 713
Tue 03:00Overcast19°0%0 mmSSW 815
Tue 04:00Overcast19°0%0 mmSW 815
Tue 05:00Mainly clear18°0%0 mmSW 714
Tue 06:00Overcast18°0%0 mmSW 815
Tue 07:00Overcast18°0%0 mmWSW 815
Tue 08:00Overcast18°0%0 mmWSW 815
Tue 09:00Overcast18°0%0 mmWSW 814
Tue 10:00Overcast19°0%0 mmWSW 1018
Tue 11:00Overcast19°2%0 mmWSW 1019
Tue 12:00Overcast19°12%0 mmWSW 1222
Tue 13:00Light drizzle18°26%0.1 mmNW 1122
Tue 14:00Light drizzle18°33%0.2 mmWNW 1019
Tue 15:00Partly cloudy20°27%0 mmWNW 917
Tue 16:00Partly cloudy21°15%0 mmW 1122
Tue 17:00Mainly clear21°6%0 mmWNW 1224
Tue 18:00Mainly clear21°5%0 mmWNW 1020
Tue 19:00Clear19°7%0 mmWNW 1324
Tue 20:00Clear18°8%0 mmWNW 1122
Tue 21:00Clear17°6%0 mmWNW 1222

Seven-day forecast

DayWeatherHighLowRainChanceWind maxSunriseSunset
Mon 14 SepOvercast20°19°0 mm2%WSW 1107:3720:20
Tue 15 SepLight drizzle21°15°0.3 mm33%W 1307:3920:18
Wed 16 SepOvercast19°13°0 mm20%WNW 1007:4120:16
Thu 17 SepLight drizzle19°14°0.9 mm78%W 1307:4220:13
Fri 18 SepLight drizzle18°11°1 mm20%WSW 1507:4420:11
Sat 19 SepLight drizzle21°16°0.2 mm25%WSW 1307:4520:09
Sun 20 SepOvercast20°15°0 mm10%WNW 907:4720:07

Sea conditions

Solent off Southsea: sea temperature 19.1°C, waves 0.28 m from the SW, period 3 s.

Air quality and pollen

Air quality Fair (European AQI 25). PM2.5 3.4, PM10 7.6, NO₂ 13.8, ozone 42 µg/m³. Pollen: grass low, birch low.

This month so far

September so far in Portsmouth (13 days): 28.6 mm of rain on 3 wet days, average high 20.9°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.