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: Overcast

Pressure: 1,019 hPa

Feel like: 20 °C

Temperature: 20°C

Cloud: 100%

Humidity: 87%

Wind: E - 21 km/h

Visibility: 37.24 km

Weather forecast

Wed
24 Jun
22°C / 35°C
Slight Thunderstorm
Thu
25 Jun
21°C / 29°C
Drizzle
Fri
26 Jun
19°C / 25°C
Moderate Drizzle
Sat
27 Jun
17°C / 21°C
Moderate Drizzle
Sun
28 Jun
15°C / 22°C
Partly Cloudy
Hourly forecast today:
03:00 AM
18° / 20°
18° / 20°
Overcast
87% 42 km/h
04:00 AM
18° / 21°
18° / 21°
Overcast
83% 34 km/h
05:00 AM
17° / 20°
17° / 20°
Overcast
83% 26 km/h
06:00 AM
17° / 21°
17° / 21°
Overcast
78% 22 km/h
07:00 AM
17° / 22°
17° / 22°
Clear Sky
71% 20 km/h
08:00 AM
17° / 24°
17° / 24°
Clear Sky
67% 17 km/h
09:00 AM
16° / 25°
16° / 25°
Clear Sky
56% 17 km/h
10:00 AM
15° / 26°
15° / 26°
Clear Sky
52% 16 km/h
11:00 AM
15° / 28°
15° / 28°
Clear Sky
47% 15 km/h
12:00 PM
16° / 29°
16° / 29°
Clear Sky
45% 18 km/h
13:00 PM
16° / 30°
16° / 30°
Clear Sky
43% 14 km/h

30 Day Averages and Extremes

  • Average high 21.63°C
  • Average low 14.83°C
  • Hottest day 35°C (24 June 2026)
  • Coldest day 0°C (06 July 2026)
  • Average humidity 64.13%
  • Days with precipitation 18 days
  • Highest precipitation 39 mm (08 June 2026)

Yesterday's Data

  • Max: 30°C
  • Min: 20°C
  • Total Precipitation: 1 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 very hot weather in Portsmouth, with the high temperatures above 31ºC (87.8ºF), consider wearing:
- Sleeveless tops or vests
- High SPF sunscreen for outdoor activities
- Light, natural fabrics (like cotton or linen)
- Ultra-thin, breathable socks

Temperature

Early
18°C / 20°C
Morning
16°C / 25°C
Afternoon
16°C / 30°C
Evening
16°C / 24°C

Air quality

Good

Satisfactory air quality, minimal pollution, low risk

  • CO2 444
  • CO 141
  • NH3 2
  • NO2 8
  • O3 85
  • PM10 18
  • PM25 10
  • SO2 1
  • CH4 1,414

Sunrise / Sunset

03:52
20:22