What is today's weather forecast for Port Jefferson, NY?

Today's forecast for Port Jefferson shows a low of 36 degrees Fahrenheit. Mostly cloudy, with a low around 36.

What is the 7-day weather forecast for Port Jefferson, NY?

The 7-day forecast for Port Jefferson shows highs from 41 to 59 degrees and lows from 36 to 48 degrees Fahrenheit. Expect precipitation on 4 days with chances of 20% or higher.

Will it rain in Port Jefferson, NY this week?

Yes, rain is possible in Port Jefferson this week. Precipitation chances: Tuesday (100% chance), Wednesday (60% chance), Sunday (40% chance), Monday (40% chance).

How accurate is the Port Jefferson weather forecast?

WeatherForYou provides highly accurate Port Jefferson forecasts using National Weather Service data and current conditions from the nearest available weather stations, often miles closer than regional airports, for the most precise local forecasts.

Port Jefferson, NY Weather Forecast and Current Conditions

Current Conditions From Nearby Local Station

Switch to Metric Units

42°F
Feels Like 42°F

Humidity 68% Dew Point 32°F Wind ESE 1 MPH Gusts 2 Barometer 30.01 in.

Report from a personal weather station 0.6 mi. ESE of central Port Jefferson
at 11:38 PM Mon, Nov 24, 2025

Point Forecast at a Glance

MonNov 24

TueNov 25

50%

WedNov 26

60%

ThuNov 27

FriNov 28

SatNov 29

SunNov 30

7-Day Temperature Trend

Week Ahead Summary

Variable high temperatures through the week, ranging from 41°F to 59°F. Some rain possible with at least 3 days showing precipitation chances of 20% or higher.

Climate Context

Temperatures are expected to be near normal for this time of year, with highs around 49°F and lows around 33°F.

This Date in Weather History

1982 - Hurricane Iwa lashed the Hawaiian Islands of Niihau, Kauai, and Oahu with high winds and surf. Winds gusting to 120 mph caused extensive shoreline damage. Damage totalled 150 million dollars on Kauai, and fifty million dollars on Oahu. The peak storm surge on the south shore was six to eight feet. It marked the first time in 25 years that Hawaii had been affected by a hurricane.

Port Jefferson, NY 7 Day Weather Forecast Details

Monday Nov 24

Night: Mostly cloudy, with a low around 36. Calm wind becoming southwest around 6 mph after midnight.

Tuesday Nov 25

Day: A 50 percent chance of rain after 1pm. Cloudy, with a high near 57. Southwest wind 7 to 11 mph.

Night: Rain. Low around 48. South wind 11 to 18 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

Wednesday Nov 26

Day: Showers likely, mainly before 7am. Cloudy, with a high near 59. Southwest wind around 10 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

Night: A 20 percent chance of showers before midnight. Partly cloudy, with a low around 37. Breezy, with a west wind 13 to 18 mph increasing to 19 to 24 mph after midnight.

Thursday Nov 27

Day: Mostly sunny, with a high near 45. Breezy.

Night: Mostly clear, with a low around 37. Windy.

Friday Nov 28

Day: Mostly sunny, with a high near 43. Windy.

Night: Mostly clear, with a low around 36. Windy.

Saturday Nov 29

Day: Sunny, with a high near 41.

Night: Mostly cloudy, with a low around 36.

Sunday Nov 30

Day: Partly sunny, with a high near 48.

Night: A 40 percent chance of rain. Mostly cloudy, with a low around 43.

Monday Dec 1

Day: A 40 percent chance of rain. Mostly cloudy, with a high near 52.

About Port Jefferson, NY

Port Jefferson, also known as Port Jeff, is an incorporated village in the town of Brookhaven in Suffolk County, on the North Shore of Long Island, in New York, United States. The population was 7,962 at the time of the 2020 census. Port Jefferson was first settled in the 17th century and remained a rural community until its development as an active shipbuilding center in the mid-19th century. The village has since transitioned to a tourist-based economy. The community's port remains active as the terminus of the Bridgeport & Port Jefferson Ferry – one of two commercial ferry lines between Long Island and Connecticut – and is supplemented by the terminus of the Long Island Rail Road's Port Jefferson Branch. It is also the center of the Greater Port Jefferson region of northwestern Brookhaven, serving as the cultural, commercial and transportation hub of the neighboring Port Jefferson Station, Belle Terre, Mount Sinai, Miller Place, Poquott, and the Setaukets.

Content from Wikipedia, licensed under CC BY-SA 3.0.

How We Provide Better Local Weather

Current conditions: We use the nearest available station to your location - including professional MESONET/MADIS and local weather stations - often miles closer than regional airports.

Forecasts: National Weather Service point forecasts predict for your specific area, not broad regional zones, making them far more relevant to your location.

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