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.

A Few Clouds

39°F

4°C

Humidity 45%
Wind Speed NW 9 mph
Barometer 30.28 in (1025.5 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 14 Mar 9:56 pm EDT
Extended Forecast for

5 Miles SSE Blue Point NY

  • Tonight

    Tonight: Partly cloudy, with a low around 34. Northwest wind 7 to 14 mph, with gusts as high as 28 mph.

    Low: 34 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 45. Southeast wind 9 to 15 mph.

    High: 45 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Showers after 2am. Temperature rising to around 46 by 5am. Breezy, with a southeast wind 14 to 22 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 42 °F⇑

    Mostly Cloudy
    then Showers
    and Breezy

  • Monday

    Monday: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 52. Windy, with a south wind 28 to 32 mph, with gusts as high as 45 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 52 °F

    Heavy Rain
    and Windy

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 34. Very windy, with a south wind 36 to 41 mph, with gusts as high as 55 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 34 °F

    Heavy Rain
    and Very
    Windy

  • Tuesday

    Tuesday: A 30 percent chance of showers before 8am. Mostly sunny, with a high near 38. Windy.

    High: 38 °F

    Windy. Chance
    Showers then
    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 27. Windy.

    Low: 27 °F

    Partly Cloudy
    and Windy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 35.

    High: 35 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 32.

    Low: 32 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 34. Northwest wind 7 to 14 mph, with gusts as high as 28 mph.
Sunday
Partly sunny, with a high near 45. Southeast wind 9 to 15 mph.
Sunday Night
Showers after 2am. Temperature rising to around 46 by 5am. Breezy, with a southeast wind 14 to 22 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 52. Windy, with a south wind 28 to 32 mph, with gusts as high as 45 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Monday Night
Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 34. Very windy, with a south wind 36 to 41 mph, with gusts as high as 55 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Tuesday
A 30 percent chance of showers before 8am. Mostly sunny, with a high near 38. Windy.
Tuesday Night
Partly cloudy, with a low around 27. Windy.
Wednesday
Mostly sunny, with a high near 35.
Wednesday Night
Mostly cloudy, with a low around 32.
Thursday
Mostly sunny, with a high near 40.
Thursday Night
Mostly cloudy, with a low around 37.
Friday
Mostly sunny, with a high near 43.
Friday Night
Partly cloudy, with a low around 37.
Saturday
A 30 percent chance of rain. Partly sunny, with a high near 44. Breezy.
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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:
7:50 pm EDT Mar 14, 2026
Forecast Valid:
10pm EDT Mar 14, 2026-6pm EDT Mar 21, 2026
 
Forecast Discussion
 
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Additional Resources

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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