Southampton weather in March
Temperature, sea and sunshine in March: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in March
Poor
Best time to visit: May – September
What is the weather like in Southampton in March?
In March, Southampton is cool: daytime highs average 10 °C, and nights cool down to about 4 °C. The sea averages 8.1 °C – swimming is only for the hardy. Expect around 4 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 57 mm in total. All in all, March is not an ideal month for a holiday in Southampton.
March compared
How the weather changes from February to April. Tap a month to open it.
| FebruaryFeb | MarchMar | AprilApr | |
|---|---|---|---|
| Score | 17 | 31 | 54 |
| Day | 8° | 10° | 13° |
| Night | 4° | 4° | 6° |
| Sea | 8° | 8° | 9° |
| Sun | 3 h | 4 h | 7 h |
| Rain days | 11 | 11 | 10 |
More details for March
- Daylight
- 11 h 47 min06:22 – 18:09
- UV index
- 3 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 27 km/haverage daily peakAll months
- Cloud cover
- 67 %on averageAll months
- Hot days
- 0 days30 °C or more
- Time zone
- UTC+0Europe/London
How the score comes together
- Temperatureweight 50 %22 %
- Sunshineweight 20 %22 %
- Few rainy daysweight 30 %51 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in March
- A jumper for the evenings
- Rain jacket or umbrella
Southampton in March: quick answers
Is Southampton hot in March?
No. In March, Southampton is cool: daytime highs average 10 °C and nights drop to about 4 °C.
Can you swim in Southampton in March?
Only if you don't mind cold water: in March the sea averages just 8.1 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Southampton in March?
Rain is frequent, with about 11 rainy days and 57 mm in total.
Southampton month by month
The whole year in SouthamptonAll destinations: United KingdomWhere to go in MarchSea temperature in March
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences