Port Jefferson Harbor entrance Marine Forecast
New York · 40.972°, -73.092° · National Weather Service
Next 24 hours
7-Day Marine Outlook
Wind, temperature, and conditions for Port Jefferson Harbor entrance.
About the marine forecast for Port Jefferson Harbor entrance
This is the National Weather Service forecast for Port Jefferson Harbor entrance (New York), covering wind, wave height, temperature, and conditions over the coming week. Wind and seas are what make or break a day on the water, so start there. Remember that gusts, not the average, are what knock you around, and that wind blowing against the tide stacks the seas up steeper than the numbers suggest. Wave height here is the significant wave height, so some individual waves come through taller.
Planning a trip out of Port Jefferson Harbor entrance? Pair this with the Port Jefferson Harbor entrance tide chart so you've got the water and the weather in one look.
Frequently asked
What is the wind forecast for Port Jefferson Harbor entrance today?+
Today at Port Jefferson Harbor entrance, expect wind from the SW at 14 mph, with chance showers and thunderstorms. See the hourly breakdown above for how it changes through the day.
Where does this Port Jefferson Harbor entrance marine forecast come from?+
It's the official National Weather Service point forecast for Port Jefferson Harbor entrance's coordinates, covering wind, temperature, and conditions for the next 7 days. It's the same data marine forecasts are built on.
Is it a good day to go boating at Port Jefferson Harbor entrance?+
Check the wind first — it's what makes or breaks a day on the water — then the conditions and any advisories. Match the forecast to your boat and experience, tell someone your plan, and always leave yourself a way back.
See the wind on your chart
Pathr paints live wind, waves, and radar right on the Port Jefferson Harbor entrance chart, and routes you around the shallows. Free to try for two months on iOS.