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:
20°C
68.0°F
°C °F

Condition: Partly Cloudy

Pressure: 1,023 hPa

Feel like: 17 °C

Temperature: 20°C

Cloud: 62%

Humidity: 38%

Wind: WNW - 14 km/h

Visibility: 34.88 km

Weather forecast

Fri
07 Aug
14°C / 23°C
Partly Cloudy
Sat
08 Aug
16°C / 26°C
Drizzle
Sun
09 Aug
17°C / 29°C
Overcast
Mon
10 Aug
17°C / 26°C
Overcast
Tue
11 Aug
18°C / 26°C
Mainly Clear
Hourly forecast today:
11:00 AM
5° / 20°
5° / 20°
Partly Cloudy
38% 31 km/h
12:00 PM
5° / 21°
5° / 21°
Partly Cloudy
35% 30 km/h
13:00 PM
5° / 21°
5° / 21°
Overcast
34% 30 km/h
14:00 PM
5° / 21°
5° / 21°
Overcast
35% 30 km/h
15:00 PM
6° / 21°
6° / 21°
Partly Cloudy
36% 29 km/h
16:00 PM
6° / 21°
6° / 21°
Partly Cloudy
37% 28 km/h
17:00 PM
6° / 21°
6° / 21°
Overcast
37% 24 km/h
18:00 PM
6° / 21°
6° / 21°
Partly Cloudy
38% 22 km/h
19:00 PM
7° / 20°
7° / 20°
Clear Sky
42% 20 km/h
20:00 PM
8° / 19°
8° / 19°
Clear Sky
48% 13 km/h
21:00 PM
8° / 18°
8° / 18°
Clear Sky
51% 13 km/h

30 Day Averages and Extremes

  • Average high 23.1°C
  • Average low 15.33°C
  • Hottest day 29°C (09 August 2026)
  • Coldest day 0°C (19 August 2026)
  • Average humidity 56.0%
  • Days with precipitation 10 days
  • Highest precipitation 21 mm (04 August 2026)

Yesterday's Data

  • Max: 21°C
  • Min: 13°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 warm weather in Portsmouth, with temperatures between 19ºC to 22ºC (66.2ºF to 71.6ºF), you might consider wearing:
- T-shirt or short-sleeve blouse
- Shorts or lightweight trousers
- Sunglasses
- Cotton or linen fabrics

Temperature

Early
10°C / 14°C
Morning
7°C / 18°C
Afternoon
6°C / 21°C
Evening
8°C / 18°C

Air quality

Good

Satisfactory air quality, minimal pollution, low risk

  • CO2 434
  • CO 130
  • NH3 1
  • NO2 2
  • O3 77
  • PM10 6
  • PM25 3
  • SO2 0
  • CH4 1,365

Sunrise / Sunset

04:40
19:40