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.

Fair

35°F

2°C

Humidity 52%
Wind Speed W 12 mph
Barometer 30.17 in (1021.6 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 29 Nov 12:56 am EST
Extended Forecast for

East Islip NY

  • Overnight

    Overnight: Mostly clear, with a low around 31. Wind chill values between 25 and 30. West wind 11 to 13 mph, with gusts as high as 28 mph.

    Low: 31 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 43. Wind chill values between 20 and 30. Northwest wind 8 to 11 mph, with gusts as high as 21 mph.

    High: 43 °F

    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 32. Calm wind becoming south around 6 mph after midnight.

    Low: 32 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Rain, mainly after 1pm. High near 53. South wind 9 to 16 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 53 °F

    Chance Rain
    then Rain

  • Sunday Night

    Sunday Night: A 40 percent chance of rain before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 34. Southwest wind 13 to 15 mph, with gusts as high as 28 mph.

    Low: 34 °F

    Chance Rain

  • Monday

    Monday: Sunny, with a high near 42.

    High: 42 °F

    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 29.

    Low: 29 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Rain, mainly after 1pm. High near 48. Chance of precipitation is 90%.

    High: 48 °F

    Chance Rain
    then Rain

  • Tuesday Night

    Tuesday Night: Rain likely, mainly before 1am. Mostly cloudy, with a low around 31. Chance of precipitation is 70%.

    Low: 31 °F

    Rain Likely

Detailed Forecast

Overnight
Mostly clear, with a low around 31. Wind chill values between 25 and 30. West wind 11 to 13 mph, with gusts as high as 28 mph.
Saturday
Sunny, with a high near 43. Wind chill values between 20 and 30. Northwest wind 8 to 11 mph, with gusts as high as 21 mph.
Saturday Night
Increasing clouds, with a low around 32. Calm wind becoming south around 6 mph after midnight.
Sunday
Rain, mainly after 1pm. High near 53. South wind 9 to 16 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
A 40 percent chance of rain before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 34. Southwest wind 13 to 15 mph, with gusts as high as 28 mph.
Monday
Sunny, with a high near 42.
Monday Night
Increasing clouds, with a low around 29.
Tuesday
Rain, mainly after 1pm. High near 48. Chance of precipitation is 90%.
Tuesday Night
Rain likely, mainly before 1am. Mostly cloudy, with a low around 31. Chance of precipitation is 70%.
Wednesday
Mostly sunny, with a high near 42.
Wednesday Night
Partly cloudy, with a low around 30.
Thursday
Partly sunny, with a high near 42.
Thursday Night
Partly cloudy, with a low around 22.
Friday
Partly sunny, with a high near 39.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
East Islip NY
 40.73°N 73.19°W (Elev. 16 ft)
Last Update:
1:05 am EST Nov 29, 2025
Forecast Valid:
1am EST Nov 29, 2025-6pm EST Dec 5, 2025
 
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Additional Resources

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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