Weather forecast in Port Jefferson

This data display current weather and forecast for the coming days in Port Jefferson. In addition to temperature, wind, humidity and pressure, we include data on the probability of precipitation so you can have all the information about your destination before your trip.

Port Jefferson current temperature and weather

September 20, 2025

Night
64.2°F Feels like: 64.2°F	Clear
	Wind: 15.9 mph (25.6 Km/h) NE Pressure: 30.14 inHg (1021 hPa) Humidity: 62%	Precip. prob.: 0% Visibility: 6 mi (10 km) UV index: 0
Morning
62.2°F Feels like: 62.2°F	Partly Cloudy
	Wind: 15.9 mph (25.6 Km/h) NE Pressure: 30.25 inHg (1024 hPa) Humidity: 67%	Precip. prob.: 0% Visibility: 6 mi (10 km) UV index: 1.3
Day
69.3°F Feels like: 69.3°F	Sunny
	Wind: 10.7 mph (17.3 Km/h) E Pressure: 30.27 inHg (1025 hPa) Humidity: 57%	Precip. prob.: 0% Visibility: 6 mi (10 km) UV index: 4
Evening
63.9°F Feels like: 63.9°F	Clear
	Wind: 11.6 mph (18.7 Km/h) SE Pressure: 30.32 inHg (1027 hPa) Humidity: 66%	Precip. prob.: 0% Visibility: 6 mi (10 km) UV index: 0

Marine weather forecast Port Jefferson

The graphs show wave heights and directions, as well as wind speed and direction in Port Jefferson for the coming days. Click on the sea state chart for more details

In order for you to be able to estimate what the weather is like in Port Jefferson throughout the year, we provide monthly data for the last few years. Select the month you are interested in.

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Our report for Port Jefferson is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.