Portsmouth weather in November
In November, Portsmouth has daytime highs averaging 11 °C, nights around 6.5 °C, with 12 wet days, and a sea temperature of 13 °C. Figures are 1991–2020 climate normals.
- 11.0°C Average high
- 6.5°C Average low
- 12days Wet days
- 81mm Rainfall
- 13.1°C Sea temperature
- 9.0h Daylight
Daily temperatures through November
How November develops
Averages for the first, middle and last part of the month, from daily 1991–2020 normals. Chance of rain is the share of years in which that calendar day recorded more than 1 mm.
| Days | Avg high | Avg low | Chance of rain |
|---|---|---|---|
| 1–10 November | 12.3 °C | 7.6 °C | 40 % |
| 11–20 November | 10.8 °C | 6.3 °C | 38 % |
| 21–30 November | 9.9 °C | 5.7 °C | 41 % |
- Average highs fall from 12.3 °C early in November to 9.9 °C by the end of it.
What to expect
| Measure | Typical November | Share of the month |
|---|---|---|
| Days above 25 °C | 0 of 30 | 0 % |
| Days above 30 °C | 0 of 30 | 0 % |
| Days below 0 °C | 0.8 of 30 | 3 % |
| Days with more than 1 mm rain | 12 of 30 | 40 % |
Conditions in November
| Measure | Average |
|---|---|
| Mean temperature | 8.8 °C |
| Record high (1991–2020) | 17 °C |
| Record low (1991–2020) | -2.7 °C |
| Relative humidity | 85 % |
| Wind speed | 27 km/h |
| Cloud cover | 70 % |
November compared with the months around it
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| January | 8.0 °C | 69 mm | 72 % |
| September | 18.3 °C | 54 mm | 62 % |
| October | 14.7 °C | 78 mm | 67 % |
| November | 11.0 °C | 81 mm | 70 % |
| December | 8.5 °C | 77 mm | 71 % |
See all twelve months for Portsmouth
- November is the 8th warmest month here.
- It is the 12th driest month of the year.
- It ranks 10th for least cloud cover.
- Days last about 9.0 hours from sunrise to sunset.
- It rains on 12 of 30 days — 40 % of the month.
- Nights are about 4.5 °C cooler than the middle of the day.
- The hottest November day on record since 1991 reached 17 °C, 6.2 °C above the usual daytime high.
- Beach score: 7 / 100 — see how this is calculated.
QuestionsNovember in Portsmouth, answered
How warm is Portsmouth in November?
Daily highs average 11 °C and nights fall to about 6.5 °C, a spread of 4.5 °C between afternoon and dawn. That makes November the 8th warmest month of the year here.
Does it rain much in Portsmouth in November?
November averages 81 mm of rain, spread over about 12 of the 30 days — 40 % of the month. Cloud cover averages 70 % of the sky.
Is the sea warm enough to swim in November?
The sea averages 13 °C off Portsmouth in November. Most people find water below 20 °C bracing and above 25 °C comfortable for a long swim; this figure is a monthly surface average, so a sheltered bay on a still afternoon can be warmer.
How long are the days in November?
Portsmouth averages 9.0 hours between sunrise and sunset in November. Day length is computed from latitude and date, so it is exact rather than modelled — but it says nothing about how much of that time is sunny.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: daylight hours, beach and comfort scores, monthly rankings, threshold day counts, chance of a wet day by date, ten-day averages within the month. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.