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

32°F

0°C

Humidity 61%
Wind Speed SW 7 mph
Barometer 30.08 in (1018.7 mb)
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 13 Jan 6:56 am EST
Extended Forecast for

5 Miles SSE Blue Point NY

  • Today

    Today: Mostly sunny, with a high near 44. Southwest wind 14 to 18 mph.

    High: 44 °F

    Mostly Sunny

  • Tonight

    Tonight: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 41. Breezy, with a southwest wind 20 to 23 mph.

    Low: 41 °F

    Breezy.
    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: Cloudy, with a high near 44. Southwest wind 10 to 16 mph.

    High: 44 °F

    Cloudy

  • Wednesday Night

    Wednesday Night: A 40 percent chance of rain. Cloudy, with a low around 32. South wind 8 to 13 mph.

    Low: 32 °F

    Chance Rain

  • Thursday

    Thursday: A slight chance of rain before 10am, then a slight chance of snow between 10am and 1pm. Cloudy, then gradually becoming mostly sunny, with a temperature falling to around 30 by 5pm. Breezy, with a west wind 16 to 22 mph. Chance of precipitation is 20%.

    High: 38 °F⇓

    Breezy.
    Slight Chance
    Rain/Snow
    then Slight
    Chance Snow

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 21. Breezy.

    Low: 21 °F

    Partly Cloudy
    and Breezy

  • Friday

    Friday: Mostly sunny, with a high near 36.

    High: 36 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 32. Breezy.

    Low: 32 °F

    Mostly Cloudy
    and Breezy

  • Saturday

    Saturday: Partly sunny, with a high near 41.

    High: 41 °F

    Partly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 44. Southwest wind 14 to 18 mph.
Tonight
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 41. Breezy, with a southwest wind 20 to 23 mph.
Wednesday
Cloudy, with a high near 44. Southwest wind 10 to 16 mph.
Wednesday Night
A 40 percent chance of rain. Cloudy, with a low around 32. South wind 8 to 13 mph.
Thursday
A slight chance of rain before 10am, then a slight chance of snow between 10am and 1pm. Cloudy, then gradually becoming mostly sunny, with a temperature falling to around 30 by 5pm. Breezy, with a west wind 16 to 22 mph. Chance of precipitation is 20%.
Thursday Night
Partly cloudy, with a low around 21. Breezy.
Friday
Mostly sunny, with a high near 36.
Friday Night
Mostly cloudy, with a low around 32. Breezy.
Saturday
Partly sunny, with a high near 41.
Saturday Night
Mostly cloudy, with a low around 32.
Sunday
Partly sunny, with a high near 38. Breezy.
Sunday Night
Mostly cloudy, with a low around 26. Breezy.
M.L.King Day
Partly sunny, with a high near 33. 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:
5:50 am EST Jan 13, 2026
Forecast Valid:
7am EST Jan 13, 2026-6pm EST Jan 19, 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