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

January weather forecast and climate
Chelsea, MA

Ocean temperature

In January, the average ocean temperature in Chelsea, Massachusetts, is 41.4°F (5.2°C).
Note: Swimming in 41.4°F (5.2°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

In January, the average length of the day is 9.5h.

What is the ocean temperature in January in Chelsea?

In Chelsea, Massachusetts, in January, the average water temperature is 41.4°F (5.2°C). Swimming in 41.4°F (5.2°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

How many hours of daylight does Chelsea have in January?

In Chelsea, the average length of the day in January is 9.5h.
Average sea temperature in January - Chelsea, MA
  • Average sea temperature in January: 41.3°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 January - Chelsea, MA
  • Average daylight in January: 9.5h

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