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

August weather forecast and climate
Port Jefferson, NY

Average sea temperature in August - Port Jefferson, NY
  • Average sea temperature in August: 74°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 August - Port Jefferson, NY
  • Average daylight in August: 13.8h

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