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.

Partly Cloudy

60°F

16°C

Humidity 35%
Wind Speed NW 16 G 25 mph
Barometer 29.92 in (1013.0 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Last update 1 Nov 3:56 pm EDT
Extended Forecast for

Nissequogue NY

  • Tonight

    Tonight: Partly cloudy, with a low around 43. Northwest wind 7 to 13 mph, with gusts as high as 24 mph.

    Low: 43 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 58. Northwest wind around 6 mph.

    High: 58 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 45. South wind around 5 mph becoming calm in the evening.

    Low: 45 °F

    Mostly Clear

  • Monday

    Monday: A 30 percent chance of rain after 2pm. Mostly sunny, with a high near 62. Light southwest wind increasing to 5 to 10 mph in the morning.

    High: 62 °F

    Mostly Sunny
    then Chance
    Rain

  • Monday Night

    Monday Night: A 30 percent chance of rain, mainly before 8pm. Partly cloudy, with a low around 48. Southwest wind 9 to 11 mph becoming west after midnight.

    Low: 48 °F

    Chance Rain

  • Tuesday

    Tuesday: Sunny, with a high near 61.

    High: 61 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 61.

    High: 61 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 45.

    Low: 45 °F

    Chance Rain

Detailed Forecast

Tonight
Partly cloudy, with a low around 43. Northwest wind 7 to 13 mph, with gusts as high as 24 mph.
Sunday
Sunny, with a high near 58. Northwest wind around 6 mph.
Sunday Night
Mostly clear, with a low around 45. South wind around 5 mph becoming calm in the evening.
Monday
A 30 percent chance of rain after 2pm. Mostly sunny, with a high near 62. Light southwest wind increasing to 5 to 10 mph in the morning.
Monday Night
A 30 percent chance of rain, mainly before 8pm. Partly cloudy, with a low around 48. Southwest wind 9 to 11 mph becoming west after midnight.
Tuesday
Sunny, with a high near 61.
Tuesday Night
Mostly clear, with a low around 45.
Wednesday
Mostly sunny, with a high near 61.
Wednesday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 45.
Thursday
Mostly sunny, with a high near 56.
Thursday Night
Mostly clear, with a low around 40.
Friday
Partly sunny, with a high near 59.
Friday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 49.
Saturday
Mostly sunny, with a high near 62.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Nissequogue NY
 40.9°N 73.18°W (Elev. 7 ft)
Last Update:
3:53 pm EDT Nov 1, 2025
Forecast Valid:
4pm EDT Nov 1, 2025-6pm EST Nov 8, 2025
 
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