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

74°F

23°C

Humidity 91%
Wind Speed SW 8 mph
Barometer 30.06 in (1017.8 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Last update 28 Jun 12:56 pm EDT
Extended Forecast for

5 Miles SSE Blue Point NY

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 75. South wind around 10 mph.

    High: 75 °F

    Mostly Cloudy

  • Tonight

    Tonight: A 50 percent chance of showers and thunderstorms, mainly before 5am. Cloudy, then becoming partly cloudy toward daybreak, with a low around 70. South wind around 11 mph.

    Low: 70 °F

    Chance
    T-storms

  • Sunday

    Sunday: Mostly sunny, with a high near 79. West wind 6 to 9 mph.

    High: 79 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 70. Southwest wind 5 to 8 mph becoming calm after midnight.

    Low: 70 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 77. Calm wind becoming south 5 to 9 mph in the afternoon.

    High: 77 °F

    Partly Sunny

  • Monday Night

    Monday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 71.

    Low: 71 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 78.

    High: 78 °F

    Partly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 70.

    Low: 70 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 75. South wind around 10 mph.
Tonight
A 50 percent chance of showers and thunderstorms, mainly before 5am. Cloudy, then becoming partly cloudy toward daybreak, with a low around 70. South wind around 11 mph.
Sunday
Mostly sunny, with a high near 79. West wind 6 to 9 mph.
Sunday Night
Partly cloudy, with a low around 70. Southwest wind 5 to 8 mph becoming calm after midnight.
Monday
Partly sunny, with a high near 77. Calm wind becoming south 5 to 9 mph in the afternoon.
Monday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 71.
Tuesday
A 50 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 78.
Tuesday Night
A 30 percent chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 70.
Wednesday
Sunny, with a high near 79.
Wednesday Night
Mostly clear, with a low around 70.
Thursday
Mostly sunny, with a high near 79.
Thursday Night
Partly cloudy, with a low around 70.
Independence Day
Mostly sunny, with a high near 78.
Basemap Options
Click map to change the forecast location
Loading map...
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:
10:29 am EDT Jun 28, 2025
Forecast Valid:
1pm EDT Jun 28, 2025-6pm EDT Jul 4, 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