National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Partly Cloudy

71°F

22°C

Humidity 71%
Wind Speed N 3 mph
Barometer 30.01 in (1016.1 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 10 Aug 6:56 am EDT
Extended Forecast for

Blue Point NY

Heat Advisory August 10, 07:58am until August 10, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 10, 07:58am until August 10, 07:00pm

    NOW until 7:00pm Mon

    Heat Advisory

  • Today

    High: 85 °F

    Sunny

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly between 8pm and 11pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 75. Southwest wind around 8 mph.

    Low: 75 °F

    Chance
    Showers then
    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 87. West wind 7 to 10 mph.

    High: 87 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 71. West wind 3 to 6 mph.

    Low: 71 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Mostly sunny, with a high near 83. Light and variable wind becoming south 5 to 8 mph in the afternoon.

    High: 83 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers after 2am. Partly cloudy, with a low around 72.

    Low: 72 °F

    Partly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: A 30 percent chance of showers before 8am. Mostly sunny, with a high near 84.

    High: 84 °F

    Chance
    Showers then
    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 71.

    Low: 71 °F

    Partly Cloudy

Detailed Forecast

Today
Sunny, with a high near 85. Light and variable wind becoming south 5 to 10 mph in the afternoon.
Tonight
A 30 percent chance of showers and thunderstorms, mainly between 8pm and 11pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 75. Southwest wind around 8 mph.
Tuesday
Mostly sunny, with a high near 87. West wind 7 to 10 mph.
Tuesday Night
Increasing clouds, with a low around 71. West wind 3 to 6 mph.
Wednesday
Mostly sunny, with a high near 83. Light and variable wind becoming south 5 to 8 mph in the afternoon.
Wednesday Night
A 40 percent chance of showers after 2am. Partly cloudy, with a low around 72.
Thursday
A 30 percent chance of showers before 8am. Mostly sunny, with a high near 84.
Thursday Night
Partly cloudy, with a low around 71.
Friday
Mostly sunny, with a high near 81.
Friday Night
Partly cloudy, with a low around 65.
Saturday
Sunny, with a high near 79.
Saturday Night
Partly cloudy, with a low around 67.
Sunday
Mostly sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Blue Point NY
 40.75°N 73.04°W (Elev. 30 ft)
Last Update:
3:02 am EDT Aug 10, 2026
Forecast Valid:
7am EDT Aug 10, 2026-6pm EDT Aug 16, 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