National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Fair

26°F

-3°C

Humidity 69%
Wind Speed Calm
Barometer 30.36 in (1028.2 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Last update 19 Mar 12:56 am EDT
Extended Forecast for

5 Miles SSE Blue Point NY

  • Overnight

    Overnight: Partly cloudy, with a low around 27. Light southeast wind.

    Low: 27 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 40. South wind 5 to 8 mph.

    High: 40 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a steady temperature around 37. South wind around 7 mph.

    Low: 37 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 47. South wind 6 to 10 mph.

    High: 47 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Rain likely, mainly after 2am. Mostly cloudy, with a low around 39. South wind 14 to 17 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 39 °F

    Chance Rain
    then Rain
    Likely

  • Saturday

    Saturday: A 30 percent chance of rain before 8am. Partly sunny, with a high near 50.

    High: 50 °F

    Chance Rain
    then Partly
    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 39.

    Low: 39 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 51.

    High: 51 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: A 40 percent chance of rain after 8pm. Mostly cloudy, with a low around 36. Breezy.

    Low: 36 °F

    Chance Rain
    and Breezy

Detailed Forecast

Overnight
Partly cloudy, with a low around 27. Light southeast wind.
Thursday
Mostly sunny, with a high near 40. South wind 5 to 8 mph.
Thursday Night
Mostly cloudy, with a steady temperature around 37. South wind around 7 mph.
Friday
Mostly sunny, with a high near 47. South wind 6 to 10 mph.
Friday Night
Rain likely, mainly after 2am. Mostly cloudy, with a low around 39. South wind 14 to 17 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
A 30 percent chance of rain before 8am. Partly sunny, with a high near 50.
Saturday Night
Mostly cloudy, with a low around 39.
Sunday
Mostly cloudy, with a high near 51.
Sunday Night
A 40 percent chance of rain after 8pm. Mostly cloudy, with a low around 36. Breezy.
Monday
Mostly sunny, with a high near 46. Breezy.
Monday Night
Partly cloudy, with a low around 29. Blustery.
Tuesday
Mostly sunny, with a high near 41.
Tuesday Night
Mostly cloudy, with a low around 32.
Wednesday
Partly sunny, with a high near 46.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSE Blue Point NY
 40.68°N 72.99°W (Elev. 0 ft)
Last Update:
5:35 pm EDT Mar 18, 2026
Forecast Valid:
1am EDT Mar 19, 2026-6pm EDT Mar 25, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation