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

29°F

-2°C

Humidity 69%
Wind Speed Calm
Barometer 30.33 in (1027.2 mb)
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Last update 19 Mar 4:56 am EDT
Extended Forecast for

5 Miles SSE Blue Point NY

  • Today

    Today: Mostly sunny, with a high near 39. Calm wind becoming south 5 to 7 mph in the morning.

    High: 39 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 37. South wind 6 to 8 mph.

    Low: 37 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 44. West wind 6 to 14 mph becoming south in the afternoon.

    High: 44 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Rain likely. Mostly cloudy, with a low around 41. Breezy, with a south wind around 21 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 41 °F

    Rain Likely
    and Breezy

  • Saturday

    Saturday: Partly sunny, with a high near 49. West wind around 14 mph.

    High: 49 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 39.

    Low: 39 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 47.

    High: 47 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Rain likely, mainly after 2am. Mostly cloudy, with a low around 39. Breezy. Chance of precipitation is 60%.

    Low: 39 °F

    Rain Likely
    and Breezy

  • Monday

    Monday: Rain likely, mainly before 8am. Mostly cloudy, with a high near 43. Breezy. Chance of precipitation is 60%.

    High: 43 °F

    Breezy. Rain
    Likely then
    Chance Rain

Detailed Forecast

Today
Mostly sunny, with a high near 39. Calm wind becoming south 5 to 7 mph in the morning.
Tonight
Partly cloudy, with a low around 37. South wind 6 to 8 mph.
Friday
Mostly sunny, with a high near 44. West wind 6 to 14 mph becoming south in the afternoon.
Friday Night
Rain likely. Mostly cloudy, with a low around 41. Breezy, with a south wind around 21 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Partly sunny, with a high near 49. West wind around 14 mph.
Saturday Night
Mostly cloudy, with a low around 39.
Sunday
Mostly cloudy, with a high near 47.
Sunday Night
Rain likely, mainly after 2am. Mostly cloudy, with a low around 39. Breezy. Chance of precipitation is 60%.
Monday
Rain likely, mainly before 8am. Mostly cloudy, with a high near 43. Breezy. Chance of precipitation is 60%.
Monday Night
Partly cloudy, with a low around 30. Blustery.
Tuesday
Mostly sunny, with a high near 40. Breezy.
Tuesday Night
Mostly cloudy, with a low around 35.
Wednesday
Partly sunny, with a high near 44.
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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 19, 2026
Forecast Valid:
5am EDT Mar 19, 2026-6pm EDT Mar 25, 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