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.

A Few Clouds

78°F

26°C

Humidity 56%
Wind Speed NE 3 mph
Barometer 30.10 in (1019.1 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 19 Jul 8:56 am EDT
Extended Forecast for

Blue Point NY

  • Today

    Today: Mostly sunny, with a high near 80. East wind 5 to 9 mph becoming south in the afternoon.

    High: 80 °F

    Mostly Sunny

  • Tonight

    Tonight: A slight chance of showers, then a chance of showers and thunderstorms after 11pm. Mostly cloudy, with a low around 72. South wind around 7 mph. Chance of precipitation is 40%.

    Low: 72 °F

    Chance
    T-storms

  • Sunday

    Sunday: A 50 percent chance of showers and thunderstorms, mainly after 2pm. Partly sunny, with a high near 85. Southwest wind 6 to 10 mph.

    High: 85 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 70. West wind 6 to 8 mph becoming north after midnight.

    Low: 70 °F

    Chance
    T-storms then
    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 82. North wind around 9 mph.

    High: 82 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 80. East wind 5 to 9 mph becoming south in the afternoon.
Tonight
A slight chance of showers, then a chance of showers and thunderstorms after 11pm. Mostly cloudy, with a low around 72. South wind around 7 mph. Chance of precipitation is 40%.
Sunday
A 50 percent chance of showers and thunderstorms, mainly after 2pm. Partly sunny, with a high near 85. Southwest wind 6 to 10 mph.
Sunday Night
A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 70. West wind 6 to 8 mph becoming north after midnight.
Monday
Sunny, with a high near 82. North wind around 9 mph.
Monday Night
Mostly clear, with a low around 66.
Tuesday
Sunny, with a high near 77.
Tuesday Night
Mostly clear, with a low around 68.
Wednesday
Mostly sunny, with a high near 82.
Wednesday Night
Partly cloudy, with a low around 71.
Thursday
Mostly sunny, with a high near 85.
Thursday Night
Mostly cloudy, with a low around 74.
Friday
Partly sunny, with a high near 87.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Blue Point NY
 40.75°N 73.04°W (Elev. 30 ft)
Last Update:
4:50 am EDT Jul 19, 2025
Forecast Valid:
9am EDT Jul 19, 2025-6pm EDT Jul 25, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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