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.

Overcast

43°F

6°C

Humidity 68%
Wind Speed SW 15 G 24 mph
Barometer 30.40 in (1029.4 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Wind Chill36°F (2°C)
Last update 29 Mar 10:56 pm EDT
Extended Forecast for

5 Miles SSE Blue Point NY

  • Tonight

    Tonight: Mostly cloudy, with a low around 41. Southwest wind around 16 mph.

    Low: 41 °F

    Mostly Cloudy

  • Monday

    Monday: A 20 percent chance of showers after 2pm. Partly sunny, with a high near 48. Breezy, with a southwest wind 18 to 21 mph.

    High: 48 °F

    Breezy.
    Partly Sunny
    then Slight
    Chance
    Showers

  • Monday Night

    Monday Night: A slight chance of showers before 8pm, then a chance of rain after 2am. Mostly cloudy, with a low around 46. Southwest wind 14 to 16 mph. Chance of precipitation is 30%.

    Low: 46 °F

    Mostly Cloudy
    then Chance
    Rain

  • Tuesday

    Tuesday: A 30 percent chance of rain before 2pm. Partly sunny, with a high near 52. Southwest wind 15 to 18 mph.

    High: 52 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 48. Windy, with a southwest wind around 26 mph.

    Low: 48 °F

    Mostly Cloudy
    and Windy

  • Wednesday

    Wednesday: A 50 percent chance of rain after 2pm. Partly sunny, with a high near 54. Breezy.

    High: 54 °F

    Breezy.
    Partly Sunny
    then Chance
    Rain

  • Wednesday Night

    Wednesday Night: A chance of rain and thunderstorms before 8pm, then rain likely and possibly a thunderstorm between 8pm and 2am, then a chance of rain and thunderstorms after 2am. Mostly cloudy, with a low around 44. Chance of precipitation is 70%.

    Low: 44 °F

    Rain Likely

  • Thursday

    Thursday: A 40 percent chance of rain. Cloudy, with a high near 47. Breezy.

    High: 47 °F

    Chance Rain
    and Breezy

  • Thursday Night

    Thursday Night: A 50 percent chance of rain. Cloudy, with a low around 41. Breezy.

    Low: 41 °F

    Chance Rain
    and Breezy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 41. Southwest wind around 16 mph.
Monday
A 20 percent chance of showers after 2pm. Partly sunny, with a high near 48. Breezy, with a southwest wind 18 to 21 mph.
Monday Night
A slight chance of showers before 8pm, then a chance of rain after 2am. Mostly cloudy, with a low around 46. Southwest wind 14 to 16 mph. Chance of precipitation is 30%.
Tuesday
A 30 percent chance of rain before 2pm. Partly sunny, with a high near 52. Southwest wind 15 to 18 mph.
Tuesday Night
Mostly cloudy, with a low around 48. Windy, with a southwest wind around 26 mph.
Wednesday
A 50 percent chance of rain after 2pm. Partly sunny, with a high near 54. Breezy.
Wednesday Night
A chance of rain and thunderstorms before 8pm, then rain likely and possibly a thunderstorm between 8pm and 2am, then a chance of rain and thunderstorms after 2am. Mostly cloudy, with a low around 44. Chance of precipitation is 70%.
Thursday
A 40 percent chance of rain. Cloudy, with a high near 47. Breezy.
Thursday Night
A 50 percent chance of rain. Cloudy, with a low around 41. Breezy.
Friday
A 50 percent chance of rain. Cloudy, with a high near 49. Breezy.
Friday Night
A 50 percent chance of rain. Cloudy, with a low around 41. Breezy.
Saturday
A 30 percent chance of rain. Mostly cloudy, with a high near 48. Breezy.
Saturday Night
A 40 percent chance of rain. Cloudy, with a low around 41. Breezy.
Sunday
A 50 percent chance of rain. Cloudy, with a high near 52. 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:
7:43 pm EDT Mar 29, 2026
Forecast Valid:
11pm EDT Mar 29, 2026-6pm EDT Apr 5, 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