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

34°F

1°C

Humidity 92%
Wind Speed SW 5 mph
Barometer 30.12 in (1019.9 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 20 Mar 6:56 am EDT
Extended Forecast for

5 Miles SSE Blue Point NY

  • Today

    Today: A 30 percent chance of rain after 5pm. Mostly sunny, with a high near 45. Breezy, with a south wind 7 to 12 mph increasing to 15 to 20 mph in the afternoon.

    High: 45 °F

    Mostly Sunny
    then Chance
    Rain and
    Breezy

  • Tonight

    Tonight: Rain, mainly before 2am. Low around 41. Windy, with a southwest wind 18 to 28 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 41 °F

    Rain and
    Windy

  • Saturday

    Saturday: Mostly sunny, with a high near 47. Northwest wind 10 to 14 mph.

    High: 47 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 39. North wind around 7 mph becoming southeast after midnight.

    Low: 39 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 20 percent chance of rain after 2pm. Mostly cloudy, with a high near 47. South wind 10 to 15 mph.

    High: 47 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Sunday Night

    Sunday Night: Rain likely, mainly after 2am. Cloudy, with a low around 40. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 40 °F

    Rain Likely

  • Monday

    Monday: Rain likely, mainly before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 44. Chance of precipitation is 60%.

    High: 44 °F

    Rain Likely

  • Monday Night

    Monday Night: Partly cloudy, with a low around 32. Breezy.

    Low: 32 °F

    Partly Cloudy
    and Breezy

  • Tuesday

    Tuesday: Sunny, with a high near 40.

    High: 40 °F

    Sunny

Detailed Forecast

Today
A 30 percent chance of rain after 5pm. Mostly sunny, with a high near 45. Breezy, with a south wind 7 to 12 mph increasing to 15 to 20 mph in the afternoon.
Tonight
Rain, mainly before 2am. Low around 41. Windy, with a southwest wind 18 to 28 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Mostly sunny, with a high near 47. Northwest wind 10 to 14 mph.
Saturday Night
Mostly cloudy, with a low around 39. North wind around 7 mph becoming southeast after midnight.
Sunday
A 20 percent chance of rain after 2pm. Mostly cloudy, with a high near 47. South wind 10 to 15 mph.
Sunday Night
Rain likely, mainly after 2am. Cloudy, with a low around 40. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
Rain likely, mainly before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 44. Chance of precipitation is 60%.
Monday Night
Partly cloudy, with a low around 32. Breezy.
Tuesday
Sunny, with a high near 40.
Tuesday Night
Mostly cloudy, with a low around 36.
Wednesday
Mostly cloudy, with a high near 45.
Wednesday Night
Mostly cloudy, with a low around 34.
Thursday
A 30 percent chance of rain. Partly sunny, with a high near 45. 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:
2:26 am EDT Mar 20, 2026
Forecast Valid:
7am EDT Mar 20, 2026-6pm EDT Mar 26, 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