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:
17°C
62.6°F
°C °F

Condition: Clear Sky

Pressure: 1,014 hPa

Feel like: 17 °C

Temperature: 17°C

Cloud: 0%

Humidity: 88%

Wind: W - 12 km/h

Visibility: 14.94 km

Weather forecast

Sat
20 Jun
16°C / 29°C
Slight Thunderstorm
Sun
21 Jun
21°C / 30°C
Slight Thunderstorm
Mon
22 Jun
20°C / 33°C
Slight Thunderstorm
Tue
23 Jun
21°C / 31°C
Clear Sky
Wed
24 Jun
19°C / 25°C
Clear Sky
Hourly forecast today:
21:00 PM
15° / 17°
15° / 17°
Clear Sky
88% 24 km/h
22:00 PM
15° / 16°
15° / 16°
Clear Sky
91% 24 km/h
23:00 PM
15° / 16°
15° / 16°
Clear Sky
92% 20 km/h
00:00 AM
15° / 16°
15° / 16°
Overcast
92% 25 km/h
01:00 AM
15° / 16°
15° / 16°
Partly Cloudy
92% 23 km/h
02:00 AM
15° / 16°
15° / 16°
Overcast
91% 24 km/h
03:00 AM
15° / 16°
15° / 16°
Overcast
91% 20 km/h
04:00 AM
15° / 16°
15° / 16°
Overcast
92% 19 km/h
05:00 AM
15° / 16°
15° / 16°
Overcast
95% 18 km/h
06:00 AM
16° / 16°
16° / 16°
Overcast
97% 21 km/h
07:00 AM
16° / 17°
16° / 17°
Overcast
93% 19 km/h

30 Day Averages and Extremes

  • Average high 20.5°C
  • Average low 14.13°C
  • Hottest day 33°C (22 June 2026)
  • Coldest day 0°C (02 July 2026)
  • Average humidity 65.97%
  • Days with precipitation 16 days
  • Highest precipitation 66 mm (05 June 2026)

Yesterday's Data

  • Max: 22°C
  • Min: 15°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:
- Cotton or linen fabrics
- Light, breathable socks
- Sunscreen (if spending time outdoors)
- Sun hat or cap

Temperature

Early
14°C / 15°C
Morning
15°C / 19°C
Afternoon
15°C / 21°C
Evening
15°C / 17°C

Air quality

Good

Satisfactory air quality, minimal pollution, low risk

  • CO2 446
  • CO 101
  • NH3 0
  • NO2 13
  • O3 44
  • PM10 6
  • PM25 4
  • SO2 1
  • CH4 1,354

Sunrise / Sunset

03:51
20:21