Threemile Harbor, New York Weather
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Weather Forecast for Threemile Harbor, New York : Suffolk County
Issued: 4:37 am EDT Sep 17, 2025 Latitude: 41.0159332 Longitude: -72.1795229 View on Google Maps

MouseOver for Detail Forecast
Overnight Wednesday Thursday Friday Saturday Sunday Monday Tuesday
30% chance of rain on Overnight 40% chance of rain on Wednesday 30% chance of rain on Thursday Sunny on Friday Sunny on Saturday Sunny on Sunday Mostly Sunny on Monday Mostly Sunny on Tuesday
Low: 64°F High: 69°F High: 72°F High: 75°F High: 65°F High: 66°F High: 69°F High: 72°F
Low: 65°F Low: 66°F Low: 59°F Low: 60°F Low: 61°F Low: 63°F  
Rain Rain Rain Sunny Sunny Sunny Mostly Sunny Mostly Sunny
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Current Conditions at
MONTAUK - (KMTP)
68°
Clear
as of 4:54 AM EDST
Rel. Humidity: 64%
Dew Point: 55°F
Pressure: 30.15 in.
Wind Data
8 MPH
070° East
Current Conditions at
GROTON - (KGON)
57°
Clear
as of 4:56 AM EDST
Rel. Humidity: 100%
Dew Point: 57°F
Visibility: 10 Miles
Pressure: 30.15 in.
Flight Rule: VFR
Wind Data
9 MPH
030° Northeast
Cloud Level(s): Clear
Current Conditions at
WESTHAMPTON BEACH - (KFOK)
64°
Clear
as of 4:53 AM EDST
Rel. Humidity: 77%
Dew Point: 57°F
Visibility: 10 Miles
Pressure: 30.12 in.
Flight Rule: VFR
Wind Data
9 MPH
060° Northeast
Cloud Level(s): Clear
Current Conditions at
WESTERLY STATE ARPT - (KWST)
57°
Mostly Cloudy
as of 4:53 AM EDST
Rel. Humidity: 93%
Dew Point: 55°F
Visibility: 10 Miles
Pressure: 30.16 in.
Flight Rule: VFR
Wind Data
6 MPH
030° Northeast
Cloud Level(s): Broken at 9500ft
30% chance of rain Overnight Overnight... A 30 percent chance of showers. Mostly cloudy, with a low around 64. East wind around 14 mph.
40% chance of rain Wednesday Wednesday... A 40 percent chance of showers, mainly after 11am. Mostly cloudy, with a high near 69. East wind around 14 mph.
70% chance of thunderstorms Wednesday Night Wednesday Night... Showers likely and possibly a thunderstorm before 11pm, then a chance of showers and thunderstorms between 11pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 65. East wind 8 to 10 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
30% chance of rain Thursday Thursday... A 30 percent chance of showers before 2pm. Mostly cloudy, then gradually becoming sunny, with a high near 72. Northeast wind 5 to 7 mph becoming north in the afternoon.
Mostly Clear on Thursday Night Thursday Night... Mostly clear, with a low around 66. Calm wind becoming west around 6 mph after midnight.
Sunny on Friday Friday... Sunny, with a high near 75.
Mostly Clear on Friday Night Friday Night... Mostly clear, with a low around 59.
Sunny on Saturday Saturday... Sunny, with a high near 65.
Mostly Clear on Saturday Night Saturday Night... Mostly clear, with a low around 60.
Sunny on Sunday Sunday... Sunny, with a high near 66.
Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around 61.
Mostly Sunny on Monday Monday... Mostly sunny, with a high near 69.
Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 63.
Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 72.
Current Radar Image


Sun Almanac for Threemile Harbor, New York
Sunrise: 06:32 AM
Sunset: 6:54 PM
Civil Sunrise:06:04 AM
Civil Sunset: 7:22 PM
Nautical Sunrise: 05:32 AM
Nautical Sunset: 7:54 PM
Astro Sunrise: 04:59 AM
Astro Sunset: 8:27 PM
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