Chelsea
Massachusetts, USA
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Chelsea, MA

Ocean temperature

In Chelsea, Massachusetts, the average seawater temperature in May is 49.1°F (9.5°C).
Note: Swimming in 49.1°F (9.5°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

The average length of the day in May is 14.6h.

What is the water temperature in May in Chelsea?

In May, the average ocean temperature is 49.1°F (9.5°C). Swimming in 49.1°F (9.5°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

What is the average length of the day in May in Chelsea?

In May, the average length of the day in Chelsea is 14.6h.
Average sea temperature in May - Chelsea, MA
  • Average sea temperature in May: 49.2°F

The best month for swimming (with the highest average sea temperature) is August (67.9°F).
The coldest month (with the lowest average sea temperature) is February (38.1°F).

Average daylight in May - Chelsea, MA
  • Average daylight in May: 14.6h

The month with the longest days is June (Average daylight: 15.2h).
The month with shortest days is December (Average daylight: 9.1h).