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

31°F

-1°C

Humidity 69%
Wind Speed NE 3 mph
Barometer 30.39 in (1029.2 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Last update 15 Mar 3:56 am EDT
Extended Forecast for

5 Miles SSE Blue Point NY

  • Today

    Today: Partly sunny, with a high near 44. Northeast wind 8 to 15 mph becoming southeast in the afternoon.

    High: 44 °F

    Partly Sunny

  • Tonight

    Tonight: Showers, with thunderstorms also possible after 5am. Patchy fog after 2am. Temperature falling to near 40 by 8pm, then rising to around 45 during the remainder of the night. Windy, with an east wind 16 to 21 mph increasing to 24 to 29 mph after midnight. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 40 °F⇑

    Slight Chance
    Showers and
    Breezy then
    Showers and
    Patchy Fog

  • Monday

    Monday: Intermittent showers and thunderstorms. Areas of fog before noon. Otherwise, cloudy, with a high near 52. Windy, with a south wind 31 to 36 mph, with gusts as high as 47 mph. Chance of precipitation is 50%.

    High: 52 °F

    Intermittent
    T-storms and
    Areas Fog

  • Monday Night

    Monday Night: Periods of showers and possibly a thunderstorm before 2am, then a chance of showers. Some of the storms could produce heavy rainfall. Low around 36. Very windy, with a south wind 38 to 47 mph becoming west after midnight. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 36 °F

    Heavy Rain
    and Very
    Windy

  • Tuesday

    Tuesday: A 30 percent chance of showers before 8am. Mostly sunny, with a high near 39. Windy, with a west wind 25 to 29 mph.

    High: 39 °F

    Chance
    Showers and
    Windy then
    Sunny and
    Breezy

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 27. Windy.

    Low: 27 °F

    Partly Cloudy
    and Windy

  • Wednesday

    Wednesday: Increasing clouds, with a high near 35.

    High: 35 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 32.

    Low: 32 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 41.

    High: 41 °F

    Partly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 44. Northeast wind 8 to 15 mph becoming southeast in the afternoon.
Tonight
Showers, with thunderstorms also possible after 5am. Patchy fog after 2am. Temperature falling to near 40 by 8pm, then rising to around 45 during the remainder of the night. Windy, with an east wind 16 to 21 mph increasing to 24 to 29 mph after midnight. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
Intermittent showers and thunderstorms. Areas of fog before noon. Otherwise, cloudy, with a high near 52. Windy, with a south wind 31 to 36 mph, with gusts as high as 47 mph. Chance of precipitation is 50%.
Monday Night
Periods of showers and possibly a thunderstorm before 2am, then a chance of showers. Some of the storms could produce heavy rainfall. Low around 36. Very windy, with a south wind 38 to 47 mph becoming west after midnight. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
A 30 percent chance of showers before 8am. Mostly sunny, with a high near 39. Windy, with a west wind 25 to 29 mph.
Tuesday Night
Partly cloudy, with a low around 27. Windy.
Wednesday
Increasing clouds, with a high near 35.
Wednesday Night
Mostly cloudy, with a low around 32.
Thursday
Partly sunny, with a high near 41.
Thursday Night
Mostly cloudy, with a low around 36.
Friday
Partly sunny, with a high near 44.
Friday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 37. Breezy.
Saturday
A 50 percent chance of rain. Partly sunny, with a high near 44. 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:
3:46 am EDT Mar 15, 2026
Forecast Valid:
4am EDT Mar 15, 2026-6pm EDT Mar 21, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

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Chance of Precipitation