Port Jefferson Station, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Port Jefferson Station, a community in Suffolk County, New York.
This Afternoon
71°F
Sunny
Sunny. High near 71, with temperatures falling to around 65 in the afternoon. South wind around 10 mph.
7-day forecast for Port Jefferson Station
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 71°F | Sunny | 10 mph S | 0% |
| Tonight | 58°F | Partly Cloudy | 3 to 8 mph S | 0% |
| Thursday | 70°F | Mostly Cloudy | 7 to 12 mph S | 8% |
| Thursday Night | 61°F | Showers And Thunderstorms Likely | 5 to 10 mph SW | 73% |
| Friday | 67°F | Showers And Thunderstorms | 6 mph S | 95% |
| Friday Night | 54°F | Showers And Thunderstorms | 3 mph SW | 83% |
| Saturday | 63°F | Mostly Sunny | 5 to 8 mph NW | 14% |
| Saturday Night | 46°F | Slight Chance Light Rain | 10 mph W | 23% |
| Sunday | 58°F | Slight Chance Light Rain then Mostly Sunny | 10 mph W | 18% |
| Sunday Night | 44°F | Partly Cloudy | 10 mph W | 6% |
| Monday | 58°F | Sunny | 10 to 14 mph W | 14% |
| Monday Night | 43°F | Mostly Clear | 12 mph W | 14% |
| Tuesday | 59°F | Sunny | 13 mph SW | 5% |
| Tuesday Night | 43°F | Mostly Clear | 10 mph W | 2% |
Forecast source: National Weather Service (api.weather.gov) for Port Jefferson Station (40.926, -73.065). Updated through the day.
Growing snapshot for Port Jefferson Station
Last spring frost
Apr 4
First fall frost
Nov 7
Growing season
215 days
Hardiness zone
7b
More local growing data for Port Jefferson Station: nearby ZIP 11776 weather · frost dates · planting calendar · New York frost dates
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Climate data from the nearest NOAA station, Mt Sinai, Ny (1.9 mi from Port Jefferson Station). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.