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

38°F

3°C

Humidity 55%
Wind Speed SW 6 mph
Barometer 30.19 in (1022.3 mb)
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 19 Mar 5:56 pm EDT
Extended Forecast for

5 Miles SSE Blue Point NY

  • Tonight

    Tonight: Mostly cloudy during the early evening, then becoming mostly clear, with a low around 36. South wind 7 to 10 mph.

    Low: 36 °F

    Mostly Clear

  • Friday

    Friday: A 30 percent chance of rain after 5pm. Mostly sunny, with a high near 45. West wind 6 to 11 mph becoming south 12 to 17 mph in the afternoon.

    High: 45 °F

    Mostly Sunny
    then Chance
    Rain

  • Friday Night

    Friday Night: Rain likely, mainly between 8pm and 2am. Cloudy, with a low around 41. Breezy, with a southwest wind 17 to 25 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: A 30 percent chance of rain before 8am. Mostly sunny, with a high near 48. Northwest wind 9 to 11 mph.

    High: 48 °F

    Chance Rain
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 39. West wind around 8 mph becoming southeast in the evening.

    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 40. Breezy. Chance of precipitation is 60%.

    Low: 40 °F

    Rain Likely
    and Breezy

  • Monday

    Monday: Rain likely, mainly before 8am. Partly sunny, with a high near 48. Breezy. Chance of precipitation is 60%.

    High: 48 °F

    Breezy. Rain
    Likely then
    Chance Rain

  • Monday Night

    Monday Night: Mostly clear, with a low around 32. Breezy.

    Low: 32 °F

    Mostly Clear
    and Breezy

Detailed Forecast

Tonight
Mostly cloudy during the early evening, then becoming mostly clear, with a low around 36. South wind 7 to 10 mph.
Friday
A 30 percent chance of rain after 5pm. Mostly sunny, with a high near 45. West wind 6 to 11 mph becoming south 12 to 17 mph in the afternoon.
Friday Night
Rain likely, mainly between 8pm and 2am. Cloudy, with a low around 41. Breezy, with a southwest wind 17 to 25 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
A 30 percent chance of rain before 8am. Mostly sunny, with a high near 48. Northwest wind 9 to 11 mph.
Saturday Night
Mostly cloudy, with a low around 39. West wind around 8 mph becoming southeast in the evening.
Sunday
Mostly cloudy, with a high near 47.
Sunday Night
Rain likely, mainly after 2am. Mostly cloudy, with a low around 40. Breezy. Chance of precipitation is 60%.
Monday
Rain likely, mainly before 8am. Partly sunny, with a high near 48. Breezy. Chance of precipitation is 60%.
Monday Night
Mostly clear, with a low around 32. Breezy.
Tuesday
Sunny, with a high near 40.
Tuesday Night
Mostly cloudy, with a low around 36.
Wednesday
Partly sunny, with a high near 43.
Wednesday Night
Mostly cloudy, with a low around 35.
Thursday
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:
6:12 pm EDT Mar 19, 2026
Forecast Valid:
6pm EDT Mar 19, 2026-6pm EDT Mar 26, 2026
 
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Additional Resources

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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