Port Jefferson
New York, USA
Long-term weather forecast
Long-term weather forecast

November weather forecast and climate
Port Jefferson, NY

Ocean temperature

In Port Jefferson, New York, in Noviembre, the average water temperature is 55.6°F (13.1°C).
Note: Swimming in 55.6°F (13.1°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 Noviembre is 9.9h.

How cold is the water in Noviembre in Port Jefferson?

In Port Jefferson, New York, in Noviembre, the average water temperature is 55.6°F (13.1°C). Swimming in 55.6°F (13.1°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.

What is the average length of the day in Noviembre in Port Jefferson?

In Port Jefferson, New York, the average length of the day in Noviembre is 9.9h.
Average sea temperature in November - Port Jefferson, NY
  • Average sea temperature in November: 55.5°F

The best month for swimming (with the highest average sea temperature) is August (74°F).
The coldest month (with the lowest average sea temperature) is February (39.7°F).

Average daylight in November - Port Jefferson, NY
  • Average daylight in November: 9.9h

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