Jamesport, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Jamesport, a community in Suffolk County, New York.
This Afternoon
67°F
Partly Sunny
Partly sunny. High near 67, with temperatures falling to around 61 in the afternoon. Southwest wind around 8 mph.
7-day forecast for Jamesport
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Partly Sunny | 8 mph SW | 0% |
| Tonight | 52°F | Partly Cloudy | 6 mph SW | 3% |
| Wednesday | 70°F | Sunny | 5 to 12 mph SW | 3% |
| Wednesday Night | 57°F | Partly Cloudy | 7 mph SW | 2% |
| Thursday | 70°F | Mostly Cloudy then Slight Chance Rain Showers | 7 to 12 mph SW | 16% |
| Thursday Night | 59°F | Rain Showers | 9 mph SW | 84% |
| Friday | 67°F | Showers And Thunderstorms | 8 mph SW | 93% |
| Friday Night | 54°F | Showers And Thunderstorms | 6 mph SW | 93% |
| Saturday | 64°F | Rain Showers Likely | 6 to 9 mph NW | 66% |
| Saturday Night | 45°F | Chance Rain Showers | 9 mph NW | 25% |
| Sunday | 59°F | Slight Chance Rain Showers then Mostly Sunny | 10 mph W | 16% |
| Sunday Night | 42°F | Partly Cloudy | 7 to 10 mph W | 13% |
| Monday | 58°F | Chance Light Rain | 12 to 15 mph NW | 31% |
| Monday Night | 41°F | Chance Light Rain | 14 mph W | 31% |
Forecast source: National Weather Service (api.weather.gov) for Jamesport (40.961, -72.583). Updated through the day.
Growing snapshot for Jamesport
Last spring frost
Apr 19
First fall frost
Nov 1
Growing season
196 days
More local growing data for Jamesport: nearby ZIP 11947 weather · frost dates · planting calendar · New York frost dates
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Climate data from the nearest NOAA station, Mattituck, Ny (4.9 mi from Jamesport). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.