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

54°F

12°C

Humidity 40%
Wind Speed N 13 mph
Barometer 29.89 in (1012.1 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 21 Mar 3:56 pm EDT
Extended Forecast for

5 Miles SSE Blue Point NY

  • Tonight

    Tonight: Increasing clouds, with a low around 39. North wind 5 to 10 mph becoming light and variable.

    Low: 39 °F

    Increasing
    Clouds

  • Sunday

    Sunday: A slight chance of showers before 11am, then a chance of showers after 5pm. Mostly cloudy, with a high near 48. Southwest wind 10 to 14 mph. Chance of precipitation is 30%.

    High: 48 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Showers and thunderstorms likely, then rain after 9pm. Low around 39. West wind 7 to 11 mph becoming north after midnight. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 39 °F

    Showers

  • Monday

    Monday: Rain, mainly before 8am. High near 43. North wind 14 to 17 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 43 °F

    Rain then
    Chance Rain

  • Monday Night

    Monday Night: Mostly clear, with a low around 33. North wind 14 to 16 mph.

    Low: 33 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 41.

    High: 41 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 36.

    Low: 36 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Partly sunny, with a high near 45.

    High: 45 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 38.

    Low: 38 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Increasing clouds, with a low around 39. North wind 5 to 10 mph becoming light and variable.
Sunday
A slight chance of showers before 11am, then a chance of showers after 5pm. Mostly cloudy, with a high near 48. Southwest wind 10 to 14 mph. Chance of precipitation is 30%.
Sunday Night
Showers and thunderstorms likely, then rain after 9pm. Low around 39. West wind 7 to 11 mph becoming north after midnight. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Monday
Rain, mainly before 8am. High near 43. North wind 14 to 17 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday Night
Mostly clear, with a low around 33. North wind 14 to 16 mph.
Tuesday
Sunny, with a high near 41.
Tuesday Night
Increasing clouds, with a low around 36.
Wednesday
Partly sunny, with a high near 45.
Wednesday Night
Mostly cloudy, with a low around 38.
Thursday
A chance of rain between 8am and 2pm. Mostly cloudy, with a high near 46. Chance of precipitation is 30%.
Thursday Night
Rain likely. Mostly cloudy, with a low around 41. Windy. Chance of precipitation is 60%.
Friday
Rain likely. Mostly sunny, with a high near 46. Breezy. Chance of precipitation is 60%.
Friday Night
Partly cloudy, with a low around 31.
Saturday
Mostly sunny, with a high near 40.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSE Blue Point NY
 40.68°N 72.99°W (Elev. 0 ft)
Last Update:
3:03 pm EDT Mar 21, 2026
Forecast Valid:
4pm EDT Mar 21, 2026-6pm EDT Mar 28, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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