Portsmouth, United Kingdom Weather
- Portsmouth, United Kingdom Weather
- Current conditions
- Weather forecast
- Averages and extremes
- Yesterday's Data
- Temperature and possibility of rain in Portsmouth over the next 12 hours
- Temperature and possibility of rain in Portsmouth in the coming days
- Rainfall in Portsmouth in the coming days
- Portsmouth Weather Summary
- Weather averages by month
- Portsmouth's weather
- Frequently asked questions
- Comments
Current conditions
Updated:
Clear Sky
21°C
°C
°F
Condition: Clear Sky
Pressure: 1,029 hPa
Feel like: 21 °C
Temperature: 21°C
Cloud: 9%
Humidity: 57%
Wind: S - 7 km/h
Visibility: 26.66 km
Wed
23 Sep
11°C / 17°C
Overcast
Thu
24 Sep
15°C / 20°C
Overcast
Fri
25 Sep
13°C / 19°C
Overcast
Sat
26 Sep
15°C / 20°C
Overcast
Sun
27 Sep
14°C / 19°C
Drizzle
Hourly forecast today:
12:00 PM
12° / 21°
12° / 21°
Clear Sky
57%
18 km/h
13:00 PM
12° / 22°
12° / 22°
Clear Sky
54%
18 km/h
14:00 PM
12° / 22°
12° / 22°
Partly Cloudy
54%
18 km/h
15:00 PM
11° / 22°
11° / 22°
Partly Cloudy
52%
17 km/h
16:00 PM
11° / 21°
11° / 21°
Mainly Clear
52%
17 km/h
17:00 PM
12° / 21°
12° / 21°
Partly Cloudy
57%
16 km/h
18:00 PM
12° / 20°
12° / 20°
Clear Sky
61%
14 km/h
19:00 PM
12° / 19°
12° / 19°
Clear Sky
64%
15 km/h
20:00 PM
13° / 19°
13° / 19°
Partly Cloudy
68%
12 km/h
21:00 PM
13° / 18°
13° / 18°
Mainly Clear
74%
10 km/h
22:00 PM
14° / 18°
14° / 18°
Mainly Clear
80%
11 km/h
30 Day Averages and Extremes
- Average high 18.17°C
- Average low 12.73°C
- Hottest day 22°C (14 September 2026)
- Coldest day 0°C (05 October 2026)
- Average humidity 69.93%
- Days with precipitation 21 days
- Highest precipitation 63 mm (07 September 2026)
Yesterday's Data
- Max: 22°C
- Min: 14°C
- Total Precipitation: 0 mm
Temperature and possibility of rain in Portsmouth over the next 12 hours
Temperature and possibility of rain in Portsmouth in the coming days
Rainfall in Portsmouth in the coming days
Portsmouth Climate Summary
Portsmouth features a Marine west coast, warm summer (Köppen classification: Cfb), with an average annual temperature of 11.99ºC (53.58ºF), which is about 1.24% higher than the national average for United Kingdom. Annually, the city experiences approximately 81.04 millimeters (3.19 inches) of rainfall, spread across 148.63 rainy days, accounting for 40.72% of the year.
| Longitude | 50.8197675 |
| Latitude | -1.0879769 |
| Yearly high temperature | 13.5ºC (56.3ºF) |
| Yearly low temperature | 9.07ºC (48.33ºF) |
| Hottest month | July 19.55ºC (67.19ºF) |
| Coldest month | January 4.66ºC (40.39ºF) |
| Yearly precip | 81.04mm (3.19in) |
| Days with rainfall | 148.63 days (40.72%) |
| Driest month | April (80.01%) |
| Wettest month | October (80.96%) |
Weather averages by month
| Month | High / Low (°C) | Rain |
|---|---|---|
| January | 7.94° / 4.66° | 13.91 days |
| February | 7.89° / 4.49° | 12.18 days |
| March | 9.76° / 5.29° | 10.27 days |
| April | 12.19° / 6.77° | 9.82 days |
| May | 14.55° / 9.19° | 11.27 days |
| June | 17.27° / 11.9° | 11.45 days |
| July | 19.55° / 14.04° | 13.0 days |
| August | 19.41° / 14.44° | 12.73 days |
| September | 17.98° / 13.16° | 10.18 days |
| October | 14.99° / 11.07° | 14.27 days |
| November | 11.29° / 7.97° | 15.73 days |
| December | 9.13° / 5.89° | 13.82 days |
Portsmouth's weather
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Frequently asked questions
1. What is the hottest month in Portsmouth?
July has the highest average monthly temperature (daily mean of 19.55ºC) and January are the coolest (daily mean of 4.66ºC).
2. What should I wear in Portsmouth today?
For today's warm weather in Portsmouth, with temperatures between 19ºC to 22ºC (66.2ºF to 71.6ºF), you might consider wearing:
- Shorts or lightweight trousers
- Comfortable sandals or sneakers
- Sunglasses
- Sunscreen (if spending time outdoors)
Temperature
Early
13°C / 15°C
Morning
15°C / 18°C
Afternoon
11°C / 22°C
Evening
13°C / 18°C
Air quality
Moderate
Acceptable air quality, some pollutants present, minor health concerns for sensitive individuals
- CO2 438
- CO 194
- NH3 1
- NO2 15
- O3 52
- PM10 15
- PM25 9
- SO2 1
- CH4 1,416
Sunrise / Sunset
05:51
18:00