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

49°F

9°C

Humidity 77%
Wind Speed Calm
Barometer 30.08 in (1018.5 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Last update 28 Apr 11:56 pm EDT
Extended Forecast for

5 Miles SSE Blue Point NY

  • Overnight

    Overnight: Mostly cloudy, with a low around 45. Light and variable wind.

    Low: 45 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Increasing clouds, with a high near 56. Light and variable wind becoming south 6 to 11 mph in the morning.

    High: 56 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: Showers. Low around 47. Southeast wind around 10 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 47 °F

    Showers

  • Thursday

    Thursday: Showers, mainly before 8am. High near 57. Northeast wind 9 to 11 mph becoming northwest in the afternoon. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 57 °F

    Showers then
    Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 44. Northwest wind 15 to 18 mph.

    Low: 44 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 55.

    High: 55 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 43.

    Low: 43 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 45. Light and variable wind.
Wednesday
Increasing clouds, with a high near 56. Light and variable wind becoming south 6 to 11 mph in the morning.
Wednesday Night
Showers. Low around 47. Southeast wind around 10 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Thursday
Showers, mainly before 8am. High near 57. Northeast wind 9 to 11 mph becoming northwest in the afternoon. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
Mostly clear, with a low around 44. Northwest wind 15 to 18 mph.
Friday
Sunny, with a high near 58.
Friday Night
Partly cloudy, with a low around 44.
Saturday
Mostly sunny, with a high near 55.
Saturday Night
Mostly cloudy, with a low around 43.
Sunday
Mostly sunny, with a high near 56.
Sunday Night
Partly cloudy, with a low around 45.
Monday
Mostly sunny, with a high near 57.
Monday Night
Partly cloudy, with a low around 46. Breezy.
Tuesday
Mostly sunny, with a high near 60.
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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:
8:55 pm EDT Apr 28, 2026
Forecast Valid:
12am EDT Apr 29, 2026-6pm EDT May 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