Sag Harbor, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sag Harbor, a village in Suffolk County, New York.
This Afternoon
65°F
Partly Sunny
Partly sunny. High near 65, with temperatures falling to around 62 in the afternoon. Southwest wind around 7 mph.
7-day forecast for Sag Harbor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 65°F | Partly Sunny | 7 mph SW | 0% |
| Tonight | 55°F | Partly Cloudy then Patchy Fog | 5 mph SW | 3% |
| Wednesday | 68°F | Patchy Fog then Sunny | 5 to 10 mph SW | 3% |
| Wednesday Night | 58°F | Partly Cloudy | 6 mph SW | 1% |
| Thursday | 67°F | Mostly Cloudy | 7 to 10 mph SW | 14% |
| Thursday Night | 60°F | Rain Showers | 8 mph SW | 83% |
| Friday | 66°F | Showers And Thunderstorms | 8 mph SW | 94% |
| Friday Night | 55°F | Showers And Thunderstorms then Light Rain | 5 mph SW | 94% |
| Saturday | 63°F | Light Rain Likely | 8 mph NW | 71% |
| Saturday Night | 46°F | Chance Light Rain | 8 mph NW | 28% |
| Sunday | 58°F | Slight Chance Light Rain then Mostly Sunny | 9 mph W | 19% |
| Sunday Night | 44°F | Partly Cloudy then Slight Chance Light Rain | 6 to 9 mph W | 15% |
| Monday | 57°F | Chance Light Rain | 9 to 13 mph NW | 34% |
| Monday Night | 43°F | Chance Light Rain | 12 mph W | 34% |
Forecast source: National Weather Service (api.weather.gov) for Sag Harbor (40.994, -72.289). Updated through the day.
Growing snapshot for Sag Harbor
Last spring frost
Apr 23
First fall frost
Oct 24
Growing season
182 days
Hardiness zone
7a
More local growing data for Sag Harbor: nearby ZIP 11963 weather · frost dates · planting calendar · New York frost dates
Nearby towns & communities
Amagansett
Amityville
Aquebogue
Asharoken
Babylon
Baiting Hollow
Bay Shore
Bayport
Baywood
Belle Terre
Bellport
Blue Point
Bohemia
Brentwood
Bridgehampton
Brightwaters
Brookhaven
Calverton
Captree
Center Moriches
Centereach
Centerport
Central Islip
Cold Spring Harbor
Commack
Copiague
Coram
Cutchogue
Deer Park
Dering Harbor
Climate data from the nearest NOAA station, Bridgehampton, Ny (3.6 mi from Sag Harbor). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.