Sag Harbor, New York Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Sag Harbor weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Heavy Rain55%1.1″91°73°—
- SundayJul 5Rain33%0.40″83°71°-8°
- MondayJul 6Drizzle75%0.19″70°66°-13°
- TuesdayJul 7Heavy Drizzle79%0.09″71°63°+1°
- WednesdayJul 8Overcast24%—77°63°+6°
- ThursdayJul 9Overcast——81°66°+4°
- FridayJul 10Light Drizzle25%—85°70°+4°
AQI 132 (Unhealthy for Sensitive Groups), driven by Ozone. AQI up 71 in the last 6 hours — air quality is degrading. Ozone at AQI 202 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
CAUTION Sensitive groups (children, elderly, respiratory conditions) should limit prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 202 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 202
- UV peak
- 3.4 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 202
PM × Wind × Precip
PM2.5 at 27.8 µg/m³, PM10 at 35.4 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.79
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- background
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 10:44 PM
- Moonset
- 9:51 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Sag Harbor at a glance
- Today vs. normal: 19°F above the seasonal normal for this latitude
- Last frost: April 22 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 11963
16-Day Forecast — Sag Harbor
- Sat91°74°55%
- Sun83°71°33%
- Mon70°66°75%
- Tue71°63°79%
- Wed77°63°24%
- Thu81°66°6%
- Fri85°70°25%
- Sat86°72°26%
- Sun83°70°19%
- Mon72°67°19%
- Tue80°66°19%
- Wed82°65°24%
- Thu86°73°52%
- Fri87°70°35%
- Sat86°75°29%
- Sun85°74°36%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 4, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
SPC Convective Outlook
Storm Prediction Center — Sag Harbor
SPC has placed Sag Harbor in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Scattered severe storms possible. A few tornadoes, hail, and damaging wind gusts possible.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.
ZIP codes in Sag Harbor
- 11963