Portsmouth, United Kingdom Weather

  1. Portsmouth, United Kingdom Weather
  2. Current conditions
  3. Weather forecast
  4. Averages and extremes
  5. Yesterday's Data
  6. Temperature and possibility of rain in Portsmouth over the next 12 hours
  7. Temperature and possibility of rain in Portsmouth in the coming days
  8. Rainfall in Portsmouth in the coming days
  9. Portsmouth Weather Summary
  10. Weather averages by month
  11. Portsmouth's weather
  12. Frequently asked questions
  13. Comments
Portsmouth, Weather
(Photo by Viktor Forgacs on Unsplash)

Current conditions

Updated:
11°C
51.8°F
°C °F

Condition: Overcast

Pressure: 1,003 hPa

Feel like: 8 °C

Temperature: 11°C

Cloud: 100%

Humidity: 86%

Wind: WSW - 14 km/h

Visibility: 21.84 km

Weather forecast

Sun
12 Apr
4°C / 13°C
Overcast
Mon
13 Apr
4°C / 14°C
Overcast
Tue
14 Apr
7°C / 12°C
Overcast
Wed
15 Apr
5°C / 14°C
Overcast
Thu
16 Apr
7°C / 14°C
Overcast
Hourly forecast today:
06:00 AM
8° / 11°
8° / 11°
Overcast
86% 27 km/h
07:00 AM
9° / 11°
9° / 11°
Overcast
88% 26 km/h
08:00 AM
9° / 11°
9° / 11°
Overcast
89% 29 km/h
09:00 AM
7° / 10°
7° / 10°
Overcast
84% 33 km/h
10:00 AM
8° / 10°
8° / 10°
Overcast
84% 36 km/h
11:00 AM
6° / 10°
6° / 10°
Partly Cloudy
76% 38 km/h
12:00 PM
4° / 10°
4° / 10°
Partly Cloudy
67% 41 km/h
13:00 PM
2° / 10°
2° / 10°
Partly Cloudy
57% 47 km/h
14:00 PM
0° / 10°
0° / 10°
Overcast
46% 54 km/h
15:00 PM
-2° / 10°
-2° / 10°
Overcast
39% 59 km/h
16:00 PM
-2° / 10°
-2° / 10°
Overcast
40% 57 km/h

30 Day Averages and Extremes

  • Average high 13.67°C
  • Average low 6.83°C
  • Hottest day 21°C (07 April 2026)
  • Coldest day 2°C (25 March 2026)
  • Average humidity 71.03%
  • Days with precipitation 23 days
  • Highest precipitation 33 mm (12 April 2026)

Yesterday's Data

  • Max: 11°C
  • Min: 8°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

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 cool weather in Portsmouth, with temperatures between 8ºC to 11ºC (46.4ºF to 51.8ºF), you should consider wearing:
- Light jacket or cardigan
- Comfortable pants or jeans
- Long-sleeve top or shirt
- Cotton socks

Temperature

Early
6°C / 11°C
Morning
7°C / 10°C
Afternoon
-2°C / 10°C
Evening
3°C / 9°C

Air quality

Good

Satisfactory air quality, minimal pollution, low risk

  • CO2 446
  • CO 153
  • NH3 2
  • NO2 10
  • O3 73
  • PM10 15
  • PM25 9
  • SO2 0
  • CH4 1,417

Sunrise / Sunset

05:15
18:54