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.

Fair

41°F

5°C

Humidity 86%
Wind Speed Calm
Barometer 30.18 in (1021.9 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 26 Apr 10:56 pm EDT
Extended Forecast for

5 Miles SSE Blue Point NY

  • Tonight

    Tonight: Mostly clear, with a low around 44. North wind around 9 mph.

    Low: 44 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 55. North wind 9 to 11 mph becoming east in the afternoon.

    High: 55 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 46. Northeast wind around 7 mph.

    Low: 46 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 55. North wind around 10 mph becoming east in the afternoon.

    High: 55 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 46. Northeast wind around 7 mph.

    Low: 46 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 52.

    High: 52 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Showers, mainly after 2am. Low around 47. Chance of precipitation is 80%.

    Low: 47 °F

    Chance
    Showers then
    Showers

  • Thursday

    Thursday: Showers, mainly before 2pm. High near 53. Chance of precipitation is 80%.

    High: 53 °F

    Showers

  • Thursday Night

    Thursday Night: A 30 percent chance of showers before 2am. Mostly cloudy, with a low around 46.

    Low: 46 °F

    Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 44. North wind around 9 mph.
Monday
Sunny, with a high near 55. North wind 9 to 11 mph becoming east in the afternoon.
Monday Night
Mostly clear, with a low around 46. Northeast wind around 7 mph.
Tuesday
Mostly sunny, with a high near 55. North wind around 10 mph becoming east in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 46. Northeast wind around 7 mph.
Wednesday
Mostly cloudy, with a high near 52.
Wednesday Night
Showers, mainly after 2am. Low around 47. Chance of precipitation is 80%.
Thursday
Showers, mainly before 2pm. High near 53. Chance of precipitation is 80%.
Thursday Night
A 30 percent chance of showers before 2am. Mostly cloudy, with a low around 46.
Friday
Mostly sunny, with a high near 54. Breezy.
Friday Night
Partly cloudy, with a low around 46.
Saturday
A 30 percent chance of showers. Partly sunny, with a high near 53.
Saturday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 45.
Sunday
Mostly sunny, with a high near 54.
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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:
7:44 pm EDT Apr 26, 2026
Forecast Valid:
11pm EDT Apr 26, 2026-6pm EDT May 3, 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