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.

A Few Clouds

61°F

16°C

Humidity 29%
Wind Speed NW 16 G 25 mph
Barometer 30.21 in (1022.8 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 11 Apr 2:56 pm EDT
Extended Forecast for

Islip Terrace NY

  • Tonight

    Tonight: Patchy frost after 4am. Otherwise, clear, with a low around 37. Northwest wind 8 to 13 mph becoming light north after midnight.

    Low: 37 °F

    Clear then
    Patchy Frost

  • Sunday

    Sunday: Patchy frost before 7am. Otherwise, increasing clouds, with a high near 54. Northeast wind 6 to 10 mph becoming south in the afternoon. Winds could gust as high as 20 mph.

    High: 54 °F

    Patchy Frost
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 44. South wind around 11 mph.

    Low: 44 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 65. Southwest wind 11 to 18 mph.

    High: 65 °F

    Partly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers before 2am. Mostly cloudy, with a low around 54. Southwest wind 6 to 13 mph, with gusts as high as 24 mph.

    Low: 54 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: Partly sunny, with a high near 70.

    High: 70 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 53.

    Low: 53 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 56.

    Low: 56 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Patchy frost after 4am. Otherwise, clear, with a low around 37. Northwest wind 8 to 13 mph becoming light north after midnight.
Sunday
Patchy frost before 7am. Otherwise, increasing clouds, with a high near 54. Northeast wind 6 to 10 mph becoming south in the afternoon. Winds could gust as high as 20 mph.
Sunday Night
Mostly cloudy, with a low around 44. South wind around 11 mph.
Monday
Partly sunny, with a high near 65. Southwest wind 11 to 18 mph.
Monday Night
A 20 percent chance of showers before 2am. Mostly cloudy, with a low around 54. Southwest wind 6 to 13 mph, with gusts as high as 24 mph.
Tuesday
Partly sunny, with a high near 70.
Tuesday Night
Partly cloudy, with a low around 53.
Wednesday
Mostly sunny, with a high near 72.
Wednesday Night
Mostly cloudy, with a low around 56.
Thursday
Partly sunny, with a high near 72.
Thursday Night
Mostly cloudy, with a low around 54.
Friday
A 30 percent chance of showers. Partly sunny, with a high near 67.
Friday Night
Mostly cloudy, with a low around 49.
Saturday
Partly sunny, with a high near 62.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Islip Terrace NY
 40.75°N 73.18°W (Elev. 30 ft)
Last Update:
2:27 pm EDT Apr 11, 2026
Forecast Valid:
3pm EDT Apr 11, 2026-6pm EDT Apr 18, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation