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.

Partly Cloudy

68°F

20°C

Humidity 73%
Wind Speed N 6 mph
Barometer 30.09 in (1018.9 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 18 Sep 10:56 pm EDT
Extended Forecast for

2 Miles S Islip NY

  • Tonight

    Tonight: Partly cloudy, with a low around 56. Northeast wind 8 to 11 mph, with gusts as high as 21 mph.

    Low: 56 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 70. Northeast wind around 11 mph becoming east in the afternoon. Winds could gust as high as 21 mph.

    High: 70 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 59. Southeast wind around 7 mph.

    Low: 59 °F

    Mostly Cloudy

  • Sunday

    Sunday: A slight chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 71. Southeast wind 10 to 15 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 71 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before 2am, then showers likely. Low around 60. Southwest wind around 9 mph becoming northwest after midnight. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.

    Low: 60 °F

    Showers

  • Monday

    Monday: Showers likely, mainly before 8am. Mostly cloudy, with a high near 69. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    High: 69 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 57.

    Low: 57 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A 30 percent chance of showers. Mostly cloudy, with a high near 64. Breezy.

    High: 64 °F

    Chance
    Showers and
    Breezy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 56. Breezy.

    Low: 56 °F

    Mostly Cloudy
    and Breezy

Detailed Forecast

Tonight
Partly cloudy, with a low around 56. Northeast wind 8 to 11 mph, with gusts as high as 21 mph.
Saturday
Mostly sunny, with a high near 70. Northeast wind around 11 mph becoming east in the afternoon. Winds could gust as high as 21 mph.
Saturday Night
Mostly cloudy, with a low around 59. Southeast wind around 7 mph.
Sunday
A slight chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 71. Southeast wind 10 to 15 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
Showers and possibly a thunderstorm before 2am, then showers likely. Low around 60. Southwest wind around 9 mph becoming northwest after midnight. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
Monday
Showers likely, mainly before 8am. Mostly cloudy, with a high near 69. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Monday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 57.
Tuesday
A 30 percent chance of showers. Mostly cloudy, with a high near 64. Breezy.
Tuesday Night
Mostly cloudy, with a low around 56. Breezy.
Wednesday
Mostly cloudy, with a high near 64. Breezy.
Wednesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 56. Breezy.
Thursday
A 40 percent chance of showers. Mostly cloudy, with a high near 64. Breezy.
Thursday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 55. Breezy.
Friday
A 30 percent chance of showers. Partly sunny, with a high near 67. Breezy.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles S Islip NY
 40.71°N 73.22°W (Elev. 0 ft)
Last Update:
3:10 pm EDT Sep 18, 2026
Forecast Valid:
11pm EDT Sep 18, 2026-6pm EDT Sep 25, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation