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

October weather forecast and climate
Port Jefferson, NY

Ocean temperature

In Port Jefferson, New York, the average seawater temperature in Octubre is 63.7°F (17.6°C).
Note: For most, swimming in 63.7°F (17.6°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

Daylight

The average length of the day in Octubre is 11.1h.

What is the ocean temperature in Octubre in Port Jefferson?

In Port Jefferson, the average seawater temperature in Octubre is 63.7°F (17.6°C). Swimming in 63.7°F (17.6°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

How many hours of daylight does Port Jefferson have in Octubre?

In Octubre, the average length of the day in Port Jefferson, New York, is 11.1h.
Average sea temperature in October - Port Jefferson, NY
  • Average sea temperature in October: 63.7°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 October - Port Jefferson, NY
  • Average daylight in October: 11.1h

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