Hazardous Weather Conditions

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Overcast

74°F

23°C

Humidity 82%
Wind Speed E 6 mph
Barometer 30.16 in (1021.3 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 16 Aug 1:56 am EDT
Extended Forecast for

Islandia NY

  • Overnight

    Overnight: Mostly cloudy, with a low around 67. Light east wind.

    Low: 67 °F

    Mostly Cloudy

  • Saturday

    Saturday: Cloudy, then gradual clearing during the afternoon, with a high near 82. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 82 °F

    Clearing Late

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 69. South wind 3 to 6 mph.

    Low: 69 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 86. South wind 6 to 10 mph.

    High: 86 °F

    Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of showers, mainly before 2am.  Mostly cloudy, with a low around 65. South wind 6 to 8 mph becoming north after midnight.

    Low: 65 °F

    Chance
    Showers

  • Monday

    Monday: Partly sunny, with a high near 76.

    High: 76 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers after 2am.  Mostly cloudy, with a low around 63.

    Low: 63 °F

    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

Overnight
Mostly cloudy, with a low around 67. Light east wind.
Saturday
Cloudy, then gradual clearing during the afternoon, with a high near 82. Calm wind becoming south 5 to 7 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 69. South wind 3 to 6 mph.
Sunday
Sunny, with a high near 86. South wind 6 to 10 mph.
Sunday Night
A 30 percent chance of showers, mainly before 2am. Mostly cloudy, with a low around 65. South wind 6 to 8 mph becoming north after midnight.
Monday
Partly sunny, with a high near 76.
Monday Night
Partly cloudy, with a low around 62.
Tuesday
Mostly sunny, with a high near 77.
Tuesday Night
A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 63.
Wednesday
A 30 percent chance of showers before 2pm. Partly sunny, with a high near 78.
Wednesday Night
Mostly cloudy, with a low around 63.
Thursday
Mostly sunny, with a high near 78.
Thursday Night
Partly cloudy, with a low around 62.
Friday
Sunny, with a high near 82.
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ABOUT THIS FORECAST

 
Point Forecast:
Islandia NY
 40.81°N 73.17°W (Elev. 161 ft)
2:28 am EDT Aug 16, 2025
2am EDT Aug 16, 2025-6pm EDT Aug 22, 2025
 
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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