Weather radar Portsmouth
Real-time precipitation radar · England · United Kingdom
Portsmouth climate table – average temperature, precipitation & sunshine hours
The climate table for Portsmouth shows long-term monthly averages (2000–2023): average high and average low temperature in °C, monthly precipitation (mm), rainy days and sunshine hours per month. Data source: ERA5 reanalysis (ECMWF) via the WDTEC Climate Archive.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 8.2° | 9.6° | 11.1° | 13.3° | 16.8° | 20.6° | 21.8° | 21.6° | 19.5° | 16.2° | 12° | 10° |
| Avg low (°C) | 3.8° | 5.4° | 6° | 6.6° | 10.1° | 13.3° | 15.1° | 15° | 13.4° | 11.5° | 7.6° | 6.3° |
| Precipitation (mm) | 72 | 56 | 54 | 40 | 49 | 63 | 54 | 43 | 87 | 101 | 87 | 74 |
| Rainy days | 12 | 11 | 12 | 9 | 13 | 9 | 11 | 8 | 12 | 14 | 13 | 11 |
| Sunshine hours | 121 | 136 | 225 | 313 | 354 | 369 | 366 | 330 | 263 | 200 | 140 | 95 |
| Humidity | 84% | 84% | 80% | 73% | 75% | 72% | 74% | 75% | 79% | 84% | 84% | 85% |
Best time to visit Portsmouth
The best time to visit Portsmouth is typically August. In this month the average high is 21.6°C, precipitation is 43 mm and sunshine duration is 330 hours. The annual average high is 15.1°C, total annual precipitation is 780 mm (135 rainy days/year) and annual sunshine is 2912 hours.
Frequently asked questions about the weather in Portsmouth
How up to date is the weather radar for Portsmouth?
The weather radar for Portsmouth is updated every 5 minutes with new radar data from the OPERA composite radar. A 2-hour forecast animation is also available. Rainfall probability, wind gusts and UV index are available up to 14 days in advance.
What weather data is available for Portsmouth?
Besides the rain radar, RadarWeather provides for Portsmouth: rainfall probability, thunderstorm warning (CAPE index), wind gusts, UV index, air pressure, humidity, dew point, sunshine hours, snow line and a 14-day forecast based on ICON-D2, ECMWF IFS and GFS.
When are thunderstorms expected in Portsmouth?
The thunderstorm potential for Portsmouth is calculated from the CAPE index and lightning potential. Active storm cells and severe weather warnings are visible on the radar map in real time. Thunderstorm warnings are issued automatically as soon as storm cells are detected near Portsmouth.
What is the climate like in Portsmouth?
Portsmouth has an annual average high of 15.1°C. The warmest month is July (avg high 21.8°C), the coldest January (avg low 3.8°C). The wettest month is October with 101 mm, the driest April with 40 mm. Total annual precipitation is 780 mm (135 rainy days). Annual sunshine is 2912 hours.
Weather radar near Portsmouth
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