Roslyn Harbor
New York, USA
Long-term weather forecast
Long-term weather forecast

January weather forecast and climate
Roslyn Harbor, NY

Ocean temperature

In Roslyn Harbor, New York, in Enero, the average water temperature is 42.4°F (5.8°C).
Note: Swimming in 42.4°F (5.8°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.


In Roslyn Harbor, the average length of the day in Enero is 9.6h.

What is the ocean temperature in Enero in Roslyn Harbor?

In Enero, the average ocean temperature in Roslyn Harbor is 42.4°F (5.8°C). Swimming in 42.4°F (5.8°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 Roslyn Harbor have in Enero?

In Enero, the average length of the day in Roslyn Harbor is 9.6h.
Average sea temperature in January - Roslyn Harbor, NY
  • Average sea temperature in January: 42.4°F

The best month for swimming (with the highest average sea temperature) is August (74.1°F).
The coldest month (with the lowest average sea temperature) is February (39.9°F).

Average daylight in January - Roslyn Harbor, NY
  • Average daylight in January: 9.6h

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