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.
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.
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 |
|---|---|---|---|---|---|---|
| Mon 22:00 | Overcast | 19° | 0% | 0 mm | SW 7 | 14 |
| Mon 23:00 | Overcast | 19° | 0% | 0 mm | WSW 7 | 12 |
| Tue 00:00 | Overcast | 19° | 0% | 0 mm | WSW 6 | 12 |
| Tue 01:00 | Overcast | 19° | 0% | 0 mm | SW 5 | 11 |
| Tue 02:00 | Overcast | 19° | 0% | 0 mm | SW 7 | 13 |
| Tue 03:00 | Overcast | 19° | 0% | 0 mm | SSW 8 | 15 |
| Tue 04:00 | Overcast | 19° | 0% | 0 mm | SW 8 | 15 |
| Tue 05:00 | Mainly clear | 18° | 0% | 0 mm | SW 7 | 14 |
| Tue 06:00 | Overcast | 18° | 0% | 0 mm | SW 8 | 15 |
| Tue 07:00 | Overcast | 18° | 0% | 0 mm | WSW 8 | 15 |
| Tue 08:00 | Overcast | 18° | 0% | 0 mm | WSW 8 | 15 |
| Tue 09:00 | Overcast | 18° | 0% | 0 mm | WSW 8 | 14 |
| Tue 10:00 | Overcast | 19° | 0% | 0 mm | WSW 10 | 18 |
| Tue 11:00 | Overcast | 19° | 2% | 0 mm | WSW 10 | 19 |
| Tue 12:00 | Overcast | 19° | 12% | 0 mm | WSW 12 | 22 |
| Tue 13:00 | Light drizzle | 18° | 26% | 0.1 mm | NW 11 | 22 |
| Tue 14:00 | Light drizzle | 18° | 33% | 0.2 mm | WNW 10 | 19 |
| Tue 15:00 | Partly cloudy | 20° | 27% | 0 mm | WNW 9 | 17 |
| Tue 16:00 | Partly cloudy | 21° | 15% | 0 mm | W 11 | 22 |
| Tue 17:00 | Mainly clear | 21° | 6% | 0 mm | WNW 12 | 24 |
| Tue 18:00 | Mainly clear | 21° | 5% | 0 mm | WNW 10 | 20 |
| Tue 19:00 | Clear | 19° | 7% | 0 mm | WNW 13 | 24 |
| Tue 20:00 | Clear | 18° | 8% | 0 mm | WNW 11 | 22 |
| Tue 21:00 | Clear | 17° | 6% | 0 mm | WNW 12 | 22 |
Seven-day forecast
| Day | Weather | High | Low | Rain | Chance | Wind max | Sunrise | Sunset |
|---|---|---|---|---|---|---|---|---|
| Mon 14 Sep | Overcast | 20° | 19° | 0 mm | 2% | WSW 11 | 07:37 | 20:20 |
| Tue 15 Sep | Light drizzle | 21° | 15° | 0.3 mm | 33% | W 13 | 07:39 | 20:18 |
| Wed 16 Sep | Overcast | 19° | 13° | 0 mm | 20% | WNW 10 | 07:41 | 20:16 |
| Thu 17 Sep | Light drizzle | 19° | 14° | 0.9 mm | 78% | W 13 | 07:42 | 20:13 |
| Fri 18 Sep | Light drizzle | 18° | 11° | 1 mm | 20% | WSW 15 | 07:44 | 20:11 |
| Sat 19 Sep | Light drizzle | 21° | 16° | 0.2 mm | 25% | WSW 13 | 07:45 | 20:09 |
| Sun 20 Sep | Overcast | 20° | 15° | 0 mm | 10% | WNW 9 | 07:47 | 20:07 |
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.