Port Jefferson, NY Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Port Jefferson, NY in one place.
Sunny. High near 82, with temperatures falling to around 78 in the afternoon. Southeast wind around 9 mph.
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: Jul 24, 2026 3:41 PM EDT.
The active forecast window currently covers Jul 24 to Jul 30, 2026 for Port Jefferson, NY.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 24 to Jul 30, 2026
- Latest sync
- Jul 24, 2026 3:41 PM EDT
- Forecast office
- OKX
- Source
- NOAA / NWS
Daily Outlook
This Week in Port Jefferson
Sunday looks like the warmest upcoming period in Port Jefferson at 83 degrees F.
Tonight is the coolest period ahead with temperatures near 63 degrees F.
The strongest winds are forecast for Tuesday at about 6 to 14 mph S.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 24, 2026 3:41 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 63. East wind 2 to 8 mph.
Sunny. High near 81, with temperatures falling to around 77 in the afternoon. East wind 2 to 10 mph.
Mostly clear, with a low around 63. East wind 2 to 8 mph.
Sunny. High near 83, with temperatures falling to around 80 in the afternoon. East wind 3 to 8 mph.
Mostly clear, with a low around 66.
Mostly sunny, with a high near 83.
A chance of rain showers after 8pm. Mostly cloudy, with a low around 68. Chance of precipitation is 40%.
Rain showers likely before 2pm, then showers and thunderstorms likely. Partly sunny, with a high near 81. Chance of precipitation is 60%.
Showers and thunderstorms likely. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.
A chance of rain showers before 2pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 83. Chance of precipitation is 40%.
A slight chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 67.
Mostly sunny, with a high near 83.
Partly cloudy, with a low around 68.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Jul 24
|
Sunny
|
82°F |
9 mph
SE
|
|
Tonight
Jul 24
|
Partly Cloudy
|
63°F |
2 to 8 mph
E
|
|
Saturday
Jul 25
|
Sunny
|
81°F |
2 to 10 mph
E
|
|
Saturday Night
Jul 25
|
Mostly Clear
|
63°F |
2 to 8 mph
E
|
|
Sunday
Jul 26
|
Sunny
|
83°F |
3 to 8 mph
E
|
|
Sunday Night
Jul 26
|
Mostly Clear
|
66°F |
1 to 8 mph
SE
|
|
Monday
Jul 27
|
Mostly Sunny
|
83°F |
1 to 10 mph
S
|
|
Monday Night
Jul 27
|
Chance Rain Showers
|
68°F |
6 to 9 mph
S
|
|
Tuesday
Jul 28
|
Rain Showers Likely
|
81°F |
6 to 14 mph
S
|
|
Tuesday Night
Jul 28
|
Showers And Thunderstorms Likely
|
68°F |
7 to 13 mph
S
|
|
Wednesday
Jul 29
|
Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
83°F |
9 mph
N
|
|
Wednesday Night
Jul 29
|
Slight Chance Showers And Thunderstorms
|
67°F |
7 mph
NW
|
|
Thursday
Jul 30
|
Mostly Sunny
|
83°F |
7 mph
W
|
|
Thursday Night
Jul 30
|
Partly Cloudy
|
68°F |
6 mph
W
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Port Jefferson.
