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 15 mph
Barometer 29.68 in (1005.1 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 7 Nov 11:56 pm EST
Extended Forecast for

Islip NY

  • Overnight

    Overnight: Showers, mainly after 1am. Low around 55. Southwest wind 10 to 16 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter 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 10 mph.

    High: 64 °F

    Chance
    Showers then
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 47. Northwest wind around 6 mph becoming calm.

    Low: 47 °F

    Partly Cloudy

  • Sunday

    Sunday: Rain, mainly after 1pm. High near 61. Southeast wind 7 to 14 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 61 °F

    Chance Rain
    then Rain

  • Sunday Night

    Sunday Night: Rain before 1am, then a chance of drizzle or light rain after 1am. Low around 48. Southeast wind 6 to 10 mph becoming west after midnight. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 48 °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 30.

    Low: 30 °F

    Partly Cloudy

  • Veterans Day

    Veterans Day: Mostly sunny, with a high near 45.

    High: 45 °F

    Mostly Sunny

  • Tuesday Night

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

    Low: 37 °F

    Partly Cloudy

Detailed Forecast

Overnight
Showers, mainly after 1am. Low around 55. Southwest wind 10 to 16 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter 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 10 mph.
Saturday Night
Partly cloudy, with a low around 47. Northwest wind around 6 mph becoming calm.
Sunday
Rain, mainly after 1pm. High near 61. Southeast wind 7 to 14 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 48. Southeast wind 6 to 10 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 30.
Veterans Day
Mostly sunny, with a high near 45.
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
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Islip NY
 40.73°N 73.22°W (Elev. 7 ft)
Last Update:
5:58 pm EST Nov 7, 2025
Forecast Valid:
12am EST Nov 8, 2025-6pm EST Nov 14, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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