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

31°F

-1°C

Humidity 56%
Wind Speed NW 16 G 22 mph
Barometer 30.03 in (1016.9 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Wind Chill20°F (-7°C)
Last update 13 Mar 4:56 am EDT
Extended Forecast for

5 Miles SSE Blue Point NY

  • Today

    Today: Increasing clouds, with a high near 46. Northwest wind 6 to 16 mph becoming south in the afternoon.

    High: 46 °F

    Increasing
    Clouds

  • Tonight

    Tonight: A 20 percent chance of rain before 11pm. Partly cloudy, with a low around 38. Breezy, with a south wind 20 to 24 mph, with gusts as high as 34 mph.

    Low: 38 °F

    Breezy.
    Slight Chance
    Rain then
    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 47. Windy, with a west wind 24 to 30 mph.

    High: 47 °F

    Sunny and
    Windy

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 33. Northwest wind 7 to 15 mph.

    Low: 33 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly cloudy, with a high near 46. Southeast wind 8 to 15 mph.

    High: 46 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: A 50 percent chance of rain after 2am. Cloudy, with a low around 39. Windy.

    Low: 39 °F

    Mostly Cloudy
    then Chance
    Rain and
    Windy

  • Monday

    Monday: Rain, with thunderstorms also possible after 8am. High near 55. Windy. Chance of precipitation is 90%.

    High: 55 °F

    Rain and
    Windy

  • Monday Night

    Monday Night: Rain. Low around 38. Very windy. Chance of precipitation is 90%.

    Low: 38 °F

    Rain and Very
    Windy

  • Tuesday

    Tuesday: Rain likely before 8am. Mostly sunny, with a high near 45. Windy. Chance of precipitation is 60%.

    High: 45 °F

    Windy. Rain
    Likely then
    Mostly Sunny

Detailed Forecast

Today
Increasing clouds, with a high near 46. Northwest wind 6 to 16 mph becoming south in the afternoon.
Tonight
A 20 percent chance of rain before 11pm. Partly cloudy, with a low around 38. Breezy, with a south wind 20 to 24 mph, with gusts as high as 34 mph.
Saturday
Sunny, with a high near 47. Windy, with a west wind 24 to 30 mph.
Saturday Night
Increasing clouds, with a low around 33. Northwest wind 7 to 15 mph.
Sunday
Mostly cloudy, with a high near 46. Southeast wind 8 to 15 mph.
Sunday Night
A 50 percent chance of rain after 2am. Cloudy, with a low around 39. Windy.
Monday
Rain, with thunderstorms also possible after 8am. High near 55. Windy. Chance of precipitation is 90%.
Monday Night
Rain. Low around 38. Very windy. Chance of precipitation is 90%.
Tuesday
Rain likely before 8am. Mostly sunny, with a high near 45. Windy. Chance of precipitation is 60%.
Tuesday Night
Partly cloudy, with a low around 25. Windy.
Wednesday
Sunny, with a high near 38.
Wednesday Night
Mostly cloudy, with a low around 29.
Thursday
Partly sunny, with a high near 42.
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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:
3:05 am EDT Mar 13, 2026
Forecast Valid:
5am EDT Mar 13, 2026-6pm EDT Mar 19, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation