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.

Fair

39°F

4°C

Humidity 73%
Wind Speed W 8 mph
Barometer 29.78 in (1008.5 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 14 Mar 5:56 am EDT
Extended Forecast for

Islip Terrace NY

  • Today

    Today: Sunny, with a high near 48. Breezy, with a west wind 10 to 15 mph increasing to 19 to 24 mph in the afternoon. Winds could gust as high as 39 mph.

    High: 48 °F

    Sunny and
    Breezy

  • Tonight

    Tonight: Mostly clear, with a low around 31. Northwest wind 6 to 11 mph becoming light after midnight.

    Low: 31 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 46. Northeast wind 5 to 11 mph becoming southeast in the afternoon.

    High: 46 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Rain after 2am. Temperature falling to near 41 by 8pm, then rising to around 47 during the remainder of the night. Southeast wind 7 to 11 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 41 °F⇑

    Mostly Cloudy
    then Rain

  • Monday

    Monday: Rain, with thunderstorms also possible after 11am. Some of the storms could produce heavy rainfall. High near 57. Breezy, with a south wind 16 to 22 mph, with gusts as high as 44 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 57 °F

    Heavy Rain
    and Breezy

  • Monday Night

    Monday Night: Rain before 5am, then a chance of rain and snow. The rain could be heavy at times. Low around 34. Breezy. Chance of precipitation is 100%. Little or no snow accumulation expected.

    Low: 34 °F

    Breezy. Heavy
    Rain then
    Rain/Snow

  • Tuesday

    Tuesday: A chance of rain and snow before 8am. Mostly cloudy, then gradually becoming sunny, with a high near 43. Chance of precipitation is 30%.

    High: 43 °F

    Chance
    Rain/Snow
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 24.

    Low: 24 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 39.

    High: 39 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 48. Breezy, with a west wind 10 to 15 mph increasing to 19 to 24 mph in the afternoon. Winds could gust as high as 39 mph.
Tonight
Mostly clear, with a low around 31. Northwest wind 6 to 11 mph becoming light after midnight.
Sunday
Partly sunny, with a high near 46. Northeast wind 5 to 11 mph becoming southeast in the afternoon.
Sunday Night
Rain after 2am. Temperature falling to near 41 by 8pm, then rising to around 47 during the remainder of the night. Southeast wind 7 to 11 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Monday
Rain, with thunderstorms also possible after 11am. Some of the storms could produce heavy rainfall. High near 57. Breezy, with a south wind 16 to 22 mph, with gusts as high as 44 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Monday Night
Rain before 5am, then a chance of rain and snow. The rain could be heavy at times. Low around 34. Breezy. Chance of precipitation is 100%. Little or no snow accumulation expected.
Tuesday
A chance of rain and snow before 8am. Mostly cloudy, then gradually becoming sunny, with a high near 43. Chance of precipitation is 30%.
Tuesday Night
Partly cloudy, with a low around 24.
Wednesday
Mostly sunny, with a high near 39.
Wednesday Night
Mostly cloudy, with a low around 29.
Thursday
Mostly sunny, with a high near 44.
Thursday Night
Partly cloudy, with a low around 33.
Friday
Mostly sunny, with a high near 48.
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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:
3:09 am EDT Mar 14, 2026
Forecast Valid:
6am EDT Mar 14, 2026-6pm EDT Mar 20, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation