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

43°F

6°C

Humidity 47%
Wind Speed NE 5 mph
Barometer 30.41 in (1029.7 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 25 Mar 9:56 am EDT
Extended Forecast for

5 Miles SSE Blue Point NY

  • Today

    Today: Partly sunny, with a steady temperature around 41. South wind 8 to 10 mph.

    High: 41 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 41. South wind 13 to 15 mph.

    Low: 41 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 49. Breezy, with a southwest wind 18 to 22 mph.

    High: 49 °F

    Mostly Cloudy
    and Breezy

  • Thursday Night

    Thursday Night: Rain, mainly after 2am. Low around 45. Breezy, with a southwest wind 21 to 25 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 45 °F

    Breezy.
    Chance Rain
    then Rain

  • Friday

    Friday: Rain, mainly before 8am. High near 48. Breezy, with a north wind 15 to 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 48 °F

    Rain and
    Breezy then
    Chance Rain

  • Friday Night

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

    Low: 30 °F

    Mostly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 40.

    High: 40 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 34.

    Low: 34 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 43.

    High: 43 °F

    Sunny

Detailed Forecast

Today
Partly sunny, with a steady temperature around 41. South wind 8 to 10 mph.
Tonight
Mostly cloudy, with a low around 41. South wind 13 to 15 mph.
Thursday
Mostly cloudy, with a high near 49. Breezy, with a southwest wind 18 to 22 mph.
Thursday Night
Rain, mainly after 2am. Low around 45. Breezy, with a southwest wind 21 to 25 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Rain, mainly before 8am. High near 48. Breezy, with a north wind 15 to 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
Mostly cloudy, with a low around 30.
Saturday
Sunny, with a high near 40.
Saturday Night
Partly cloudy, with a low around 34.
Sunday
Sunny, with a high near 43.
Sunday Night
Partly cloudy, with a low around 39.
Monday
Partly sunny, with a high near 48. Breezy.
Monday Night
Mostly cloudy, with a low around 43. Breezy.
Tuesday
Partly sunny, with a high near 49. 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:
2:27 am EDT Mar 25, 2026
Forecast Valid:
10am EDT Mar 25, 2026-6pm EDT Mar 31, 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