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 75, with temperatures falling to around 70 in the afternoon. South 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: Jun 8, 2026 7:30 PM EDT.
The active forecast window currently covers Jun 8 to Jun 14, 2026 for Port Jefferson, NY.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jun 8 to Jun 14, 2026
- Latest sync
- Jun 8, 2026 7:30 PM EDT
- Forecast office
- OKX
- Source
- NOAA / NWS
Daily Outlook
This Week in Port Jefferson
Thursday looks like the warmest upcoming period in Port Jefferson at 88 degrees F.
Tonight is the coolest period ahead with temperatures near 55 degrees F.
The strongest winds are forecast for Tuesday at about 5 to 13 mph SW.
Precipitation is mentioned in 8 upcoming forecast periods.
Forecast Details
- Last updated
- Jun 8, 2026 7:30 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
Clear, with a low around 55. Southwest wind 5 to 9 mph.
Sunny. High near 75, with temperatures falling to around 72 in the afternoon. Southwest wind 5 to 13 mph.
Partly cloudy, with a low around 61. Southwest wind 8 to 12 mph.
Rain showers likely between 8am and 5pm, then showers and thunderstorms likely. Mostly cloudy. High near 75, with temperatures falling to around 72 in the afternoon. South wind 7 to 12 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
Showers and thunderstorms likely. Mostly cloudy, with a low around 64. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
A chance of rain showers before 8am, then a chance of showers and thunderstorms. Partly sunny, with a high near 88. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 40%.
A slight chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 85.
A slight chance of showers and thunderstorms before 8pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Chance of precipitation is 40%.
A slight chance of rain showers before 8am. Mostly sunny, with a high near 84.
Partly cloudy, with a low around 66.
Mostly sunny, with a high near 84.
A chance of rain showers after 8pm. Partly cloudy, with a low around 63.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Jun 8
|
Sunny
|
75°F |
9 mph
S
|
|
Tonight
Jun 8
|
Clear
|
55°F |
5 to 9 mph
SW
|
|
Tuesday
Jun 9
|
Sunny
|
75°F |
5 to 13 mph
SW
|
|
Tuesday Night
Jun 9
|
Partly Cloudy
|
61°F |
8 to 12 mph
SW
|
|
Wednesday
Jun 10
|
Rain Showers Likely
|
75°F |
7 to 12 mph
S
|
|
Wednesday Night
Jun 10
|
Showers And Thunderstorms Likely
|
64°F |
5 to 10 mph
SW
|
|
Thursday
Jun 11
|
Chance Rain Showers then Chance Showers And Thunderstorms
|
88°F |
5 to 9 mph
SW
|
|
Thursday Night
Jun 11
|
Chance Showers And Thunderstorms
|
66°F |
3 to 7 mph
W
|
|
Friday
Jun 12
|
Partly Sunny then Slight Chance Showers And Thunderstorms
|
85°F |
3 to 9 mph
SW
|
|
Friday Night
Jun 12
|
Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
|
63°F |
3 to 8 mph
SE
|
|
Saturday
Jun 13
|
Slight Chance Rain Showers then Mostly Sunny
|
84°F |
3 to 7 mph
W
|
|
Saturday Night
Jun 13
|
Partly Cloudy
|
66°F |
1 to 7 mph
SW
|
|
Sunday
Jun 14
|
Mostly Sunny
|
84°F |
1 to 9 mph
SW
|
|
Sunday Night
Jun 14
|
Chance Rain Showers
|
63°F |
3 to 8 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Port Jefferson.
