Portsmouth weather forecasts, local conditions and travel warnings. Get accurate weather updates for Hampshire's south coast city.
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.
No Environment Agency flood alerts or warnings are in force within 15 km of Portsmouth.
Next 24 hours
| Time | Weather | Temp | Rain chance | Rain | Wind | Gusts |
|---|---|---|---|---|---|---|
| Fri 10:00 | Partly cloudy | 14° | 0% | 0 mm | W 4 | 8 |
| Fri 11:00 | Overcast | 16° | 0% | 0 mm | WSW 5 | 10 |
| Fri 12:00 | Overcast | 17° | 0% | 0 mm | WSW 9 | 18 |
| Fri 13:00 | Overcast | 18° | 0% | 0 mm | WSW 12 | 23 |
| Fri 14:00 | Overcast | 18° | 0% | 0 mm | WSW 13 | 26 |
| Fri 15:00 | Partly cloudy | 18° | 0% | 0 mm | WSW 15 | 28 |
| Fri 16:00 | Partly cloudy | 18° | 0% | 0 mm | WSW 17 | 32 |
| Fri 17:00 | Overcast | 18° | 0% | 0 mm | WSW 17 | 32 |
| Fri 18:00 | Overcast | 18° | 0% | 0 mm | WSW 17 | 32 |
| Fri 19:00 | Overcast | 18° | 0% | 0 mm | WSW 16 | 30 |
| Fri 20:00 | Light drizzle | 17° | 0% | 0.1 mm | WSW 15 | 29 |
| Fri 21:00 | Overcast | 17° | 3% | 0 mm | WSW 14 | 26 |
| Fri 22:00 | Clear | 17° | 8% | 0 mm | WSW 13 | 25 |
| Fri 23:00 | Overcast | 18° | 10% | 0 mm | WSW 14 | 26 |
| Sat 00:00 | Overcast | 18° | 8% | 0 mm | WSW 13 | 25 |
| Sat 01:00 | Overcast | 18° | 3% | 0 mm | WSW 14 | 26 |
| Sat 02:00 | Overcast | 18° | 0% | 0 mm | WSW 14 | 26 |
| Sat 03:00 | Overcast | 18° | 0% | 0 mm | WSW 14 | 27 |
| Sat 04:00 | Overcast | 18° | 0% | 0 mm | WSW 14 | 26 |
| Sat 05:00 | Overcast | 18° | 0% | 0 mm | WSW 13 | 26 |
| Sat 06:00 | Overcast | 18° | 1% | 0 mm | WSW 13 | 25 |
| Sat 07:00 | Overcast | 18° | 2% | 0 mm | WSW 14 | 27 |
| Sat 08:00 | Overcast | 18° | 4% | 0 mm | WSW 14 | 27 |
| Sat 09:00 | Partly cloudy | 18° | 7% | 0 mm | WSW 14 | 26 |
Seven-day forecast
| Day | Weather | High | Low | Rain | Chance | Wind max | Sunrise | Sunset |
|---|---|---|---|---|---|---|---|---|
| Fri 18 Sep | Light drizzle | 18° | 12° | 0.1 mm | 10% | WSW 17 | 07:44 | 20:11 |
| Sat 19 Sep | Light drizzle | 20° | 18° | 0.1 mm | 12% | WSW 19 | 07:45 | 20:09 |
| Sun 20 Sep | Overcast | 18° | 14° | 0 mm | 10% | WNW 11 | 07:47 | 20:07 |
| Mon 21 Sep | Partly cloudy | 21° | 10° | 0 mm | 0% | WNW 5 | 07:48 | 20:05 |
| Tue 22 Sep | Partly cloudy | 21° | 13° | 0 mm | 0% | WSW 3 | 07:50 | 20:02 |
| Wed 23 Sep | Overcast | 19° | 14° | 0 mm | 4% | NNW 14 | 07:51 | 20:00 |
| Thu 24 Sep | Overcast | 18° | 12° | 0 mm | 0% | SSE 12 | 07:53 | 19:58 |
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.