United Kingdom
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Chepstow, United Kingdom

Sea temperature

In Chepstow, United Kingdom, in May, the average water temperature is 11.2°C (52.2°F).
Note: Swimming in 11.2°C (52.2°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.


In May, the average length of the day in Chepstow is 15.7h.

How cold is the water in May in Chepstow?

In May, the average sea temperature in Chepstow is 11.2°C (52.2°F). At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 13°C (55.4°F) is not comfortable.

How many hours of daylight does Chepstow have in May?

The average length of the day in May is 15.7h.
Average sea temperature in May - Chepstow, United Kingdom
  • Average sea temperature in May: 11.2°C

The best month for swimming (with the highest average sea temperature) is August (16.6°C).
The coldest month (with the lowest average sea temperature) is March (8.3°C).

Average daylight in May - Chepstow, United Kingdom
  • Average daylight in May: 15.7h

The month with the longest days is June (Average daylight: 16.6h).
The month with shortest days is December (Average daylight: 7.9h).