Bay
Portsmouth Harbour
England · United Kingdom · English Channel
50.8167, -1.1167 · Gosport, 3 km
- 18°Sea · August
- 23°High · July
- 6.9 hSunshine · June
Your month at the beach
Portsmouth Harbour in January
- 7°CAir, daytime high2°C at night
- 9°CSea temperature
- 1.8 hSunshine a day
- 14 daysRainy days in the month79 mm in total
- 22 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
Portsmouth Harbour in February
- 8°CAir, daytime high2°C at night
- 8°CSea temperature
- 2.7 hSunshine a day
- 11 daysRainy days in the month61 mm in total
- 21 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
Portsmouth Harbour in March
- 10°CAir, daytime high3°C at night
- 8°CSea temperature
- 4.1 hSunshine a day
- 11 daysRainy days in the month57 mm in total
- 20 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
Portsmouth Harbour in April
- 13°CAir, daytime high5°C at night
- 9°CSea temperature
- 5.8 hSunshine a day
- 11 daysRainy days in the month48 mm in total
- 17 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
Portsmouth Harbour in May
- 17°CAir, daytime high8°C at night
- 11°CSea temperature
- 6.4 hSunshine a day
- 11 daysRainy days in the month54 mm in total
- 17 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
Portsmouth Harbour in June
- 20°CAir, daytime high11°C at night
- 14°CSea temperature
- 6.9 hSunshine a day
- 11 daysRainy days in the month56 mm in total
- 16 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
Portsmouth Harbour in July
- 23°CAir, daytime high13°C at night
- 16°CSea temperature
- 6.7 hSunshine a day
- 12 daysRainy days in the month58 mm in total
- 17 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
Portsmouth Harbour in August
- 22°CAir, daytime high13°C at night
- 18°CSea temperature
- 5.7 hSunshine a day
- 12 daysRainy days in the month64 mm in total
- 17 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
Portsmouth Harbour in September
- 20°CAir, daytime high10°C at night
- 17°CSea temperature
- 5.2 hSunshine a day
- 11 daysRainy days in the month46 mm in total
- 18 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
Portsmouth Harbour in October
- 15°CAir, daytime high8°C at night
- 16°CSea temperature
- 3.2 hSunshine a day
- 14 daysRainy days in the month86 mm in total
- 20 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
Portsmouth Harbour in November
- 11°CAir, daytime high5°C at night
- 13°CSea temperature
- 2.0 hSunshine a day
- 15 daysRainy days in the month87 mm in total
- 20 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
Portsmouth Harbour in December
- 8°CAir, daytime high3°C at night
- 11°CSea temperature
- 1.6 hSunshine a day
- 14 daysRainy days in the month85 mm in total
- 21 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
The beach itself
- 68Places to stay within 5 kmHotels, guest houses, apartments and campsites · OpenStreetMap Places to stay near Portsmouth Harbour ↗
- 22 kmAirport: Southampton Airport (SOU)In a straight line; by road it is further Car hire at Southampton Airport (SOU) ↗
No reliable information yet on: bathing water quality, wheelchair access, lifeguards.
Some links above are affiliate links: if you book through them we may earn a commission, at no extra cost to you. It never changes what the data on this page says.
January from 2020 to 2025
In January 2025 the sea averaged 8.8 °C — about the same as the 1991–2020 average.
1991–2020 average: 8.9 °C
1991–2020 average: 7.4 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
February from 2020 to 2025
In February 2025 the sea averaged 7.8 °C — about the same as the 1991–2020 average.
1991–2020 average: 8.0 °C
1991–2020 average: 7.6 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
March from 2020 to 2025
In March 2025 the sea averaged 8.1 °C — about the same as the 1991–2020 average.
1991–2020 average: 7.9 °C
1991–2020 average: 9.9 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
April from 2020 to 2025
In April 2025 the sea averaged 10.3 °C — 1.1 °C above the 1991–2020 average.
1991–2020 average: 9.2 °C
1991–2020 average: 13.3 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
May from 2020 to 2025
In May 2025 the sea averaged 12.9 °C — 1.5 °C above the 1991–2020 average.
1991–2020 average: 11.4 °C
1991–2020 average: 16.7 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
June from 2020 to 2025
In June 2025 the sea averaged 16.0 °C — 1.9 °C above the 1991–2020 average.
1991–2020 average: 14.1 °C
1991–2020 average: 20.1 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
July from 2020 to 2025
In July 2025 the sea averaged 18.7 °C — 2.3 °C above the 1991–2020 average.
1991–2020 average: 16.4 °C
1991–2020 average: 22.6 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
August from 2020 to 2025
In August 2025 the sea averaged 19.0 °C — 1.2 °C above the 1991–2020 average.
1991–2020 average: 17.8 °C
1991–2020 average: 22.2 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
September from 2020 to 2025
In September 2025 the sea averaged 17.7 °C — 0.3 °C above the 1991–2020 average.
1991–2020 average: 17.4 °C
1991–2020 average: 19.7 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
October from 2020 to 2025
In October 2025 the sea averaged 15.8 °C — about the same as the 1991–2020 average.
1991–2020 average: 15.6 °C
1991–2020 average: 15.3 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
November from 2020 to 2025
In November 2025 the sea averaged 13.0 °C — about the same as the 1991–2020 average.
1991–2020 average: 13.1 °C
1991–2020 average: 10.8 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
December from 2020 to 2025
In December 2025 the sea averaged 10.7 °C — about the same as the 1991–2020 average.
1991–2020 average: 10.6 °C
1991–2020 average: 8.0 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
When to go
1991–2020 averagesThe year at a glance
- Jan9°2 h79 mm
- Feb8°3 h61 mm
- Mar8°4 h57 mm
- Apr9°6 h48 mm
- May11°6 h54 mm
- Jun14°7 h56 mm
- Jul16°7 h58 mm
- Aug18°6 h64 mm
- Sep17°5 h46 mm
- Oct16°3 h86 mm
- Nov13°2 h87 mm
- Dec11°2 h85 mm
Each card is a month. The colour is the sea temperature, on the same scale as the map; in bold, the two best months for each.
Sea temperature
1991–2020 averagesClimate through the year
1991–2020 averagesRain
Sunshine
Sunshine hours are estimated from measured solar radiation, not observed directly.
Month by month
1991–2020 averagesEvery month at Portsmouth Harbour: air, sea, rain and sunshine. Averages for 1991–2020.
| Month | High°C | Low°C | Sea°C | Rainmm | Rainy daysdays | Sunshineh/day | Windkm/h |
|---|---|---|---|---|---|---|---|
| January | 7 | 2 | 9 | 79 | 14 | 1.8 | 22 |
| February | 8 | 2 | 8 | 61 | 11 | 2.7 | 21 |
| March | 10 | 3 | 8 | 57 | 11 | 4.1 | 20 |
| April | 13 | 5 | 9 | 48 | 11 | 5.8 | 17 |
| May | 17 | 8 | 11 | 54 | 11 | 6.4 | 17 |
| June | 20 | 11 | 14 | 56 | 11 | 6.9 | 16 |
| July | 23 | 13 | 16 | 58 | 12 | 6.7 | 17 |
| Augustwarmest sea | 22 | 13 | 18 | 64 | 12 | 5.7 | 17 |
| September | 20 | 10 | 17 | 46 | 11 | 5.2 | 18 |
| October | 15 | 8 | 16 | 86 | 14 | 3.2 | 20 |
| November | 11 | 5 | 13 | 87 | 15 | 2.0 | 20 |
| December | 8 | 3 | 11 | 85 | 14 | 1.6 | 21 |
Swipe sideways to see the other columns.
Photos
Photos shared by their authors on Wikimedia Commons, with its colours adjusted.
Plan your trip
Some links above are affiliate links: if you book through them we may earn a commission, at no extra cost to you. It never changes what the data on this page says.
About these numbers
Averages are for 1991–2020; the recent years (2020–2025) are what actually happened. Neither is today's weather.
The nearest sea measurement point is 21 km away, so this figure is less precise here.
| What | Where it comes from | Nearest measurement |
|---|---|---|
| Air, rain and sunshine | NASA POWER | 22 km away |
| Sea temperature | NOAA OISST v2.1, 1991–2020 | 21 km away |
| 2020–2025, month by month | NASA POWER · NOAA OISST v2.1 | 22 km away |
| Lifeguards and places to stay | OpenStreetMap | within 1–5 km |
| Nearest airport | OurAirports | straight-line distance |
| Image at the top | Sentinel-2 cloudless (EOX) | at this spot |
More about this place: Wikipedia See every data source →