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:
14°C
57.2°F
°C °F

Condition: Clear Sky

Pressure: 1,029 hPa

Feel like: 15 °C

Temperature: 14°C

Cloud: 0%

Humidity: 93%

Wind: ENE - 4 km/h

Visibility: 8.6 km

Weather forecast

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:
04:00 AM
13° / 14°
13° / 14°
Clear Sky
93% 8 km/h
05:00 AM
13° / 14°
13° / 14°
Clear Sky
95% 5 km/h
06:00 AM
13° / 14°
13° / 14°
Clear Sky
96% 6 km/h
07:00 AM
13° / 15°
13° / 15°
Clear Sky
93% 6 km/h
08:00 AM
14° / 16°
14° / 16°
Clear Sky
88% 5 km/h
09:00 AM
15° / 18°
15° / 18°
Mainly Clear
84% 6 km/h
10:00 AM
15° / 19°
15° / 19°
Partly Cloudy
76% 9 km/h
11:00 AM
14° / 20°
14° / 20°
Partly Cloudy
70% 12 km/h
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

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

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
- Sunscreen (if spending time outdoors)
- Sunglasses
- Sun hat or cap

Temperature

Early
13°C / 15°C
Morning
15°C / 18°C
Afternoon
11°C / 22°C
Evening
13°C / 18°C

Air quality

Good

Satisfactory air quality, minimal pollution, low risk

  • CO2 466
  • CO 201
  • NH3 1
  • NO2 26
  • O3 17
  • PM10 22
  • PM25 16
  • SO2 3
  • CH4 1,463

Sunrise / Sunset

05:51
18:00