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.

Mostly Cloudy

45°F

7°C

Humidity 74%
Wind Speed SW 10 mph
Barometer 29.69 in (1005.5 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 14 Jan 8:56 am EST
Extended Forecast for

5 Miles SSE Blue Point NY

  • Today

    Today: Mostly cloudy, with a high near 46. Southwest wind 11 to 15 mph.

    High: 46 °F

    Mostly Cloudy

  • Tonight

    Tonight: A 40 percent chance of showers, mainly after 10pm. Cloudy, with a steady temperature around 42. South wind 10 to 14 mph becoming west after midnight.

    Low: 42 °F

    Chance
    Showers

  • Thursday

    Thursday: A slight chance of rain and snow showers before 1pm. Cloudy, then gradually becoming mostly sunny, with a temperature falling to around 31 by 5pm. Wind chill values between 15 and 25. Breezy, with a west wind 16 to 25 mph. Chance of precipitation is 20%.

    High: 41 °F⇓

    Slight Chance
    Rain/Snow and
    Breezy

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 23. Wind chill values between 5 and 15. Windy, with a west wind 26 to 29 mph.

    Low: 23 °F

    Partly Cloudy
    and Windy

  • Friday

    Friday: Sunny, with a high near 37. Windy, with a west wind 22 to 29 mph.

    High: 37 °F

    Sunny and
    Windy

  • Friday Night

    Friday Night: Mostly cloudy, with a steady temperature around 36. Breezy.

    Low: 36 °F

    Mostly Cloudy
    and Breezy

  • Saturday

    Saturday: A 30 percent chance of rain after 1pm. Mostly cloudy, with a high near 41.

    High: 41 °F

    Mostly Cloudy
    then Chance
    Rain

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 30.

    Low: 30 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 33.

    High: 33 °F

    Partly Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 46. Southwest wind 11 to 15 mph.
Tonight
A 40 percent chance of showers, mainly after 10pm. Cloudy, with a steady temperature around 42. South wind 10 to 14 mph becoming west after midnight.
Thursday
A slight chance of rain and snow showers before 1pm. Cloudy, then gradually becoming mostly sunny, with a temperature falling to around 31 by 5pm. Wind chill values between 15 and 25. Breezy, with a west wind 16 to 25 mph. Chance of precipitation is 20%.
Thursday Night
Partly cloudy, with a low around 23. Wind chill values between 5 and 15. Windy, with a west wind 26 to 29 mph.
Friday
Sunny, with a high near 37. Windy, with a west wind 22 to 29 mph.
Friday Night
Mostly cloudy, with a steady temperature around 36. Breezy.
Saturday
A 30 percent chance of rain after 1pm. Mostly cloudy, with a high near 41.
Saturday Night
Mostly cloudy, with a low around 30.
Sunday
Partly sunny, with a high near 33.
Sunday Night
Partly cloudy, with a low around 25.
M.L.King Day
Mostly sunny, with a high near 34. Breezy.
Monday Night
Mostly cloudy, with a low around 24. Breezy.
Tuesday
Mostly sunny, with a high near 30. 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:
6:04 am EST Jan 14, 2026
Forecast Valid:
9am EST Jan 14, 2026-6pm EST Jan 20, 2026
 
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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