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 and Breezy

62°F

17°C

Humidity 62%
Wind Speed SW 22 G 29 mph
Barometer 30.02 in (1016.4 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 31 Mar 11:56 am EDT
Extended Forecast for

5 Miles SSE Blue Point NY

  • This Afternoon

    This Afternoon: Mostly sunny, with a steady temperature around 53. Breezy, with a southwest wind around 22 mph, with gusts as high as 32 mph.

    High: 53 °F

    Mostly Sunny
    and Breezy

  • Tonight

    Tonight: A 20 percent chance of showers after 2am. Mostly cloudy, with a low around 47. Breezy, with a southwest wind 22 to 24 mph.

    Low: 47 °F

    Breezy.
    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: Rain likely, with thunderstorms also possible after 5pm. Partly sunny, with a high near 59. Southwest wind 14 to 18 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 59 °F

    Slight Chance
    Rain then
    Rain Likely

  • Wednesday Night

    Wednesday Night: Rain and possibly a thunderstorm before 11pm, then rain between 11pm and 2am, then a chance of rain and thunderstorms after 2am. Low around 41. East wind 11 to 17 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 41 °F

    Rain

  • Thursday

    Thursday: A 30 percent chance of rain, mainly before 2pm. Cloudy, with a high near 44. Northeast wind around 18 mph.

    High: 44 °F

    Chance Rain

  • Thursday Night

    Thursday Night: A chance of rain between 8pm and 2am. Cloudy, with a low around 41. Chance of precipitation is 30%.

    Low: 41 °F

    Chance Rain

  • Friday

    Friday: Mostly cloudy, with a high near 51.

    High: 51 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 47. Breezy.

    Low: 47 °F

    Mostly Cloudy
    and Breezy

  • Saturday

    Saturday: Partly sunny, with a high near 54.

    High: 54 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a steady temperature around 53. Breezy, with a southwest wind around 22 mph, with gusts as high as 32 mph.
Tonight
A 20 percent chance of showers after 2am. Mostly cloudy, with a low around 47. Breezy, with a southwest wind 22 to 24 mph.
Wednesday
Rain likely, with thunderstorms also possible after 5pm. Partly sunny, with a high near 59. Southwest wind 14 to 18 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Rain and possibly a thunderstorm before 11pm, then rain between 11pm and 2am, then a chance of rain and thunderstorms after 2am. Low around 41. East wind 11 to 17 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
A 30 percent chance of rain, mainly before 2pm. Cloudy, with a high near 44. Northeast wind around 18 mph.
Thursday Night
A chance of rain between 8pm and 2am. Cloudy, with a low around 41. Chance of precipitation is 30%.
Friday
Mostly cloudy, with a high near 51.
Friday Night
Mostly cloudy, with a low around 47. Breezy.
Saturday
Partly sunny, with a high near 54.
Saturday Night
A 30 percent chance of rain after 8pm. Mostly cloudy, with a low around 46. Breezy.
Sunday
A 40 percent chance of rain. Mostly cloudy, with a high near 54. Breezy.
Sunday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 44. Breezy.
Monday
A 30 percent chance of rain. Mostly cloudy, with a high near 48. Breezy.
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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:
10:11 am EDT Mar 31, 2026
Forecast Valid:
12pm EDT Mar 31, 2026-6pm EDT Apr 6, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation