Saint Helier weather in May
Temperature, sea and sunshine in May: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in May
Fair
Best time to visit: June – September
What is the weather like in Saint Helier in May?
In May, Saint Helier is cool: daytime highs average 14 °C, and nights cool down to about 11 °C. The sea averages 12.3 °C – swimming is only for the hardy. The sun shines for around 7 hours a day. Rain is frequent, with about 11 rainy days and 52 mm in total. All in all, May is a so-so month for a holiday in Saint Helier.
May compared
How the weather changes from April to June. Tap a month to open it.
More details for May
- Daylight
- 15 h 16 min05:26 – 20:43
- UV index
- 7 · highclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 25 km/haverage daily peakAll months
- Cloud cover
- 63 %on averageAll months
- Hot days
- 0 days30 °C or more
- Time zone
- UTC+1Europe/Jersey
How the score comes together
- Temperatureweight 50 %58 %
- Sunshineweight 20 %73 %
- Few rainy daysweight 30 %52 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in May
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
- Rain jacket or umbrella
Saint Helier in May: quick answers
Is Saint Helier hot in May?
No. In May, Saint Helier is cool: daytime highs average 14 °C and nights drop to about 11 °C.
Can you swim in Saint Helier in May?
Only if you don't mind cold water: in May the sea averages just 12.3 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Saint Helier in May?
Rain is frequent, with about 11 rainy days and 52 mm in total.
Saint Helier month by month
The whole year in Saint HelierAll destinations: JerseyWhere to go in MaySea temperature in May
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