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.

Overcast

62°F

17°C

Humidity 80%
Wind Speed SW 17 G 24 mph
Barometer 29.67 in (1004.5 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 8 Nov 12:56 am EST
Extended Forecast for

Islip, Long Island Mac Arthur Airport NY

  • Overnight

    Overnight: Showers. Low around 55. Southwest wind 9 to 14 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 55 °F

    Showers

  • Saturday

    Saturday: A 40 percent chance of showers before 10am. Cloudy through mid morning, then gradual clearing, with a high near 64. Northwest wind 7 to 11 mph.

    High: 64 °F

    Chance
    Showers then
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 45. Northwest wind around 5 mph becoming light and variable.

    Low: 45 °F

    Partly Cloudy

  • Sunday

    Sunday: Rain, mainly after 1pm. High near 61. Southeast wind 6 to 13 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 61 °F

    Slight Chance
    Rain then
    Rain

  • Sunday Night

    Sunday Night: Rain before 1am, then a chance of drizzle or light rain after 1am. Low around 47. Southeast wind 6 to 9 mph becoming west after midnight. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 47 °F

    Rain

  • Monday

    Monday: A 30 percent chance of rain before 1pm. Mostly cloudy, with a high near 55.

    High: 55 °F

    Chance Rain

  • Monday Night

    Monday Night: Partly cloudy, with a low around 29.

    Low: 29 °F

    Partly Cloudy

  • Veterans Day

    Veterans Day: Mostly sunny, with a high near 44.

    High: 44 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 37.

    Low: 37 °F

    Partly Cloudy

Detailed Forecast

Overnight
Showers. Low around 55. Southwest wind 9 to 14 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
A 40 percent chance of showers before 10am. Cloudy through mid morning, then gradual clearing, with a high near 64. Northwest wind 7 to 11 mph.
Saturday Night
Partly cloudy, with a low around 45. Northwest wind around 5 mph becoming light and variable.
Sunday
Rain, mainly after 1pm. High near 61. Southeast wind 6 to 13 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Rain before 1am, then a chance of drizzle or light rain after 1am. Low around 47. Southeast wind 6 to 9 mph becoming west after midnight. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
A 30 percent chance of rain before 1pm. Mostly cloudy, with a high near 55.
Monday Night
Partly cloudy, with a low around 29.
Veterans Day
Mostly sunny, with a high near 44.
Tuesday Night
Partly cloudy, with a low around 37.
Wednesday
Partly sunny, with a high near 55.
Wednesday Night
Partly cloudy, with a low around 41.
Thursday
Mostly sunny, with a high near 53.
Thursday Night
Mostly clear, with a low around 37.
Friday
Mostly sunny, with a high near 50.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Islip, Long Island Mac Arthur Airport NY
 40.8°N 73.09°W (Elev. 98 ft)
Last Update:
5:58 pm EST Nov 7, 2025
Forecast Valid:
1am EST Nov 8, 2025-6pm EST Nov 14, 2025
 
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Additional Resources

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High Temperature

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Chance of Precipitation