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

53°F

12°C

Humidity 86%
Wind Speed SW 12 mph
Barometer 30.16 in (1021.3 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Wind Chill49°F (9°C)
Last update 3 Apr 4:56 pm EDT
Extended Forecast for

5 Miles SSE Blue Point NY

  • Tonight

    Tonight: Widespread dense fog, mainly between 8pm and 11pm. Otherwise, mostly cloudy, with a low around 46. Breezy, with a southwest wind 16 to 22 mph.

    Low: 46 °F

    Dense Fog and
    Breezy

  • Saturday

    Saturday: A 20 percent chance of showers after 2pm. Patchy fog before 11am. Otherwise, partly sunny, with a high near 53. West wind 7 to 14 mph becoming east in the afternoon.

    High: 53 °F

    Patchy Fog
    then Slight
    Chance
    Showers

  • Saturday Night

    Saturday Night: A 40 percent chance of showers, mainly after 8pm. Cloudy, with a low around 42. Breezy, with an east wind 14 to 23 mph.

    Low: 42 °F

    Chance
    Showers and
    Breezy

  • Sunday

    Sunday: Showers likely before 11am, then showers likely and possibly a thunderstorm between 11am and 2pm, then showers after 2pm. High near 52. Windy, with a southwest wind 22 to 26 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 52 °F

    Showers and
    Windy

  • Sunday Night

    Sunday Night: Showers, mainly before 8pm. Low around 42. Southwest wind around 17 mph becoming northwest after midnight. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 42 °F

    Showers then
    Slight Chance
    Showers

  • Monday

    Monday: Sunny, with a high near 48.

    High: 48 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 41.

    Low: 41 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 46.

    High: 46 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 33.

    Low: 33 °F

    Mostly Clear

Detailed Forecast

Tonight
Widespread dense fog, mainly between 8pm and 11pm. Otherwise, mostly cloudy, with a low around 46. Breezy, with a southwest wind 16 to 22 mph.
Saturday
A 20 percent chance of showers after 2pm. Patchy fog before 11am. Otherwise, partly sunny, with a high near 53. West wind 7 to 14 mph becoming east in the afternoon.
Saturday Night
A 40 percent chance of showers, mainly after 8pm. Cloudy, with a low around 42. Breezy, with an east wind 14 to 23 mph.
Sunday
Showers likely before 11am, then showers likely and possibly a thunderstorm between 11am and 2pm, then showers after 2pm. High near 52. Windy, with a southwest wind 22 to 26 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Showers, mainly before 8pm. Low around 42. Southwest wind around 17 mph becoming northwest after midnight. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
Sunny, with a high near 48.
Monday Night
Partly cloudy, with a low around 41.
Tuesday
Mostly sunny, with a high near 46.
Tuesday Night
Mostly clear, with a low around 33.
Wednesday
Sunny, with a high near 42.
Wednesday Night
Mostly clear, with a low around 38.
Thursday
Mostly sunny, with a high near 49.
Thursday Night
Partly cloudy, with a low around 45.
Friday
Mostly sunny, with a high near 52.
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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:
2:23 pm EDT Apr 3, 2026
Forecast Valid:
5pm EDT Apr 3, 2026-6pm EDT Apr 10, 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