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:
21°C
69.8°F
°C °F

Condition: Partly Cloudy

Pressure: 1,008 hPa

Feel like: 23 °C

Temperature: 21°C

Cloud: 60%

Humidity: 72%

Wind: W - 7 km/h

Visibility: 14.16 km

Weather forecast

Tue
04 Aug
17°C / 24°C
Drizzle
Wed
05 Aug
14°C / 22°C
Overcast
Thu
06 Aug
12°C / 20°C
Overcast
Fri
07 Aug
13°C / 22°C
Overcast
Sat
08 Aug
14°C / 21°C
Overcast
Hourly forecast today:
23:00 PM
16° / 21°
16° / 21°
Partly Cloudy
72% 14 km/h
00:00 AM
16° / 21°
16° / 21°
Clear Sky
75% 11 km/h
01:00 AM
17° / 20°
17° / 20°
Clear Sky
82% 14 km/h
02:00 AM
18° / 19°
18° / 19°
Clear Sky
90% 15 km/h
03:00 AM
18° / 19°
18° / 19°
Clear Sky
90% 18 km/h
04:00 AM
17° / 19°
17° / 19°
Clear Sky
88% 15 km/h
05:00 AM
17° / 19°
17° / 19°
Overcast
88% 19 km/h
06:00 AM
18° / 20°
18° / 20°
Overcast
88% 26 km/h
07:00 AM
18° / 20°
18° / 20°
Overcast
84% 32 km/h
08:00 AM
18° / 21°
18° / 21°
Overcast
84% 29 km/h
09:00 AM
18° / 21°
18° / 21°
Overcast
85% 30 km/h

30 Day Averages and Extremes

  • Average high 22.57°C
  • Average low 14.6°C
  • Hottest day 30°C (02 August 2026)
  • Coldest day 0°C (16 August 2026)
  • Average humidity 57.0%
  • Days with precipitation 15 days
  • Highest precipitation 19 mm (15 August 2026)

Yesterday's Data

  • Max: 30°C
  • Min: 18°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 20ºC to 23ºC (68.0ºF to 73.4ºF), you might consider wearing:
- Cotton or linen fabrics
- T-shirt or short-sleeve blouse
- Sun hat or cap
- Sunglasses

Temperature

Early
10°C / 18°C
Morning
13°C / 24°C
Afternoon
12°C / 29°C
Evening
13°C / 24°C

Air quality

Good

Satisfactory air quality, minimal pollution, low risk

  • CO2 446
  • CO 168
  • NH3 2
  • NO2 32
  • O3 67
  • PM10 20
  • PM25 12
  • SO2 1
  • CH4 1,465

Sunrise / Sunset

04:36
19:45