Port Jefferson, NY Weather Forecast
Local 7-day forecast
Slight Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Port Jefferson, NY in one place.
A slight chance of showers and thunderstorms. Mostly sunny. High near 85, with temperatures falling to around 83 in the afternoon. Northwest wind around 10 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.
Local Weather Overview
This forecast page for Port Jefferson, NY is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Jun 7, 2026 7:25 PM EDT.
The active forecast window currently covers Jun 7 to Jun 13, 2026 for Port Jefferson, NY.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jun 7 to Jun 13, 2026
- Latest sync
- Jun 7, 2026 7:25 PM EDT
- Forecast office
- OKX
- Source
- NOAA / NWS
Daily Outlook
This Week in Port Jefferson
This Afternoon looks like the warmest upcoming period in Port Jefferson at 85 degrees F.
Monday Night is the coolest period ahead with temperatures near 57 degrees F.
The strongest winds are forecast for Tuesday at about 3 to 12 mph SW.
Precipitation is mentioned in 9 upcoming forecast periods.
Forecast Details
- Last updated
- Jun 7, 2026 7:25 PM EDT
- Coverage
- 7 days
- Time zone
- America/New_York
- Forecast office
- OKX
- Radar station
- KOKX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Partly cloudy, with a low around 60. North wind 7 to 10 mph, with gusts as high as 21 mph.
Sunny. High near 76, with temperatures falling to around 72 in the afternoon. East wind around 8 mph.
Clear, with a low around 57. Southwest wind 3 to 8 mph.
Sunny. High near 79, with temperatures falling to around 75 in the afternoon. Southwest wind 3 to 12 mph.
Mostly clear, with a low around 62.
A slight chance of rain showers after 2pm. Partly sunny, with a high near 81.
A slight chance of rain showers before 8pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 8am. Partly sunny, with a high near 85. Chance of precipitation is 40%.
A slight chance of showers and thunderstorms between 8pm and 2am. Partly cloudy, with a low around 64.
A slight chance of rain showers after 2pm. Mostly sunny, with a high near 85.
A slight chance of rain showers before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Partly cloudy, with a low around 64. Chance of precipitation is 30%.
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 85.
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 67.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Jun 7
|
Slight Chance Showers And Thunderstorms
|
85°F |
10 mph
NW
|
|
Tonight
Jun 7
|
Partly Cloudy
|
60°F |
7 to 10 mph
N
|
|
Monday
Jun 8
|
Sunny
|
76°F |
8 mph
E
|
|
Monday Night
Jun 8
|
Clear
|
57°F |
3 to 8 mph
SW
|
|
Tuesday
Jun 9
|
Sunny
|
79°F |
3 to 12 mph
SW
|
|
Tuesday Night
Jun 9
|
Mostly Clear
|
62°F |
7 to 10 mph
SW
|
|
Wednesday
Jun 10
|
Partly Sunny then Slight Chance Rain Showers
|
81°F |
7 to 12 mph
SW
|
|
Wednesday Night
Jun 10
|
Chance Showers And Thunderstorms
|
63°F |
7 to 12 mph
SW
|
|
Thursday
Jun 11
|
Chance Showers And Thunderstorms then Partly Sunny
|
85°F |
6 to 10 mph
SW
|
|
Thursday Night
Jun 11
|
Slight Chance Showers And Thunderstorms
|
64°F |
2 to 8 mph
W
|
|
Friday
Jun 12
|
Mostly Sunny then Slight Chance Rain Showers
|
85°F |
2 to 9 mph
SW
|
|
Friday Night
Jun 12
|
Chance Showers And Thunderstorms
|
64°F |
1 to 8 mph
SW
|
|
Saturday
Jun 13
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
85°F |
1 to 7 mph
SW
|
|
Saturday Night
Jun 13
|
Slight Chance Showers And Thunderstorms
|
67°F |
1 to 7 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Port Jefferson.
