Greenport
New York, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Greenport, NY

Ocean temperature

In Greenport, New York, the average seawater temperature in December is 48.9°F (9.4°C).
Note: Swimming in 48.9°F (9.4°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

With an average of 9.3h of daylight, December has the shortest days of the year in Greenport.

How cold is the water in December in Greenport?

In Greenport, the average seawater temperature in December is 48.9°F (9.4°C). At temperatures below 50°F (10°C), 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 55.4°F (13°C) is not comfortable.

What is the month with the shortest days in Greenport?

The month with the shortest days in Greenport, New York, is December, with an average of 9.3h of daylight.

What is the average length of the day in December in Greenport?

In December, the average length of the day in Greenport, New York, is 9.3h.
Average sea temperature in December - Greenport, NY
  • Average sea temperature in December: 48.9°F

The best month for swimming (with the highest average sea temperature) is August (72.1°F).
The coldest month (with the lowest average sea temperature) is February (38.8°F).

Average daylight in December - Greenport, NY
  • Average daylight in December: 9.3h

The month with the longest days is June (Average daylight: 15.1h).
The month with shortest days is December (Average daylight: 9.3h).