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

35°F

2°C

Humidity 70%
Wind Speed SW 8 mph
Barometer 30.11 in (1019.8 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill28°F (-2°C)
Last update 18 Jan 1:56 am EST
Extended Forecast for

Islip, Long Island Mac Arthur Airport NY

  • Overnight

    Overnight: Partly cloudy, with a steady temperature around 34. South wind around 8 mph.

    Low: 34 °F

    Partly Cloudy

  • Saturday

    Saturday: A slight chance of showers between 10am and 1pm, then rain after 1pm. High near 48. South wind 10 to 14 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    High: 48 °F

    Slight Chance
    Showers then
    Rain

  • Saturday Night

    Saturday Night: A 20 percent chance of rain before 1am. Mostly cloudy, with a low around 30. South wind 6 to 9 mph becoming west after midnight.

    Low: 30 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Sunday

    Sunday: A slight chance of rain and snow before 1pm, then rain. High near 37. North wind 7 to 9 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    High: 37 °F

    Slight Chance
    Rain/Snow
    then
    Rain/Snow

  • Sunday Night

    Sunday Night: Snow, mainly before 1am. Low around 19. Northwest wind 8 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    Low: 19 °F

    Snow

  • M.L.King Day

    M.L.King Day: Mostly sunny, with a high near 26.

    High: 26 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 8.

    Low: 8 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny and cold, with a high near 20.

    High: 20 °F

    Cold

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 9.

    Low: 9 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a steady temperature around 34. South wind around 8 mph.
Saturday
A slight chance of showers between 10am and 1pm, then rain after 1pm. High near 48. South wind 10 to 14 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
A 20 percent chance of rain before 1am. Mostly cloudy, with a low around 30. South wind 6 to 9 mph becoming west after midnight.
Sunday
A slight chance of rain and snow before 1pm, then rain. High near 37. North wind 7 to 9 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Sunday Night
Snow, mainly before 1am. Low around 19. Northwest wind 8 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
M.L.King Day
Mostly sunny, with a high near 26.
Monday Night
Partly cloudy, with a low around 8.
Tuesday
Mostly sunny and cold, with a high near 20.
Tuesday Night
Mostly cloudy, with a low around 9.
Wednesday
Mostly sunny, with a high near 21.
Wednesday Night
Partly cloudy, with a low around 10.
Thursday
Mostly sunny, with a high near 30.
Thursday Night
Mostly cloudy, with a low around 20.
Friday
Partly sunny, with a high near 34.
Click Map For Forecast
Disclaimer
Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
Islip, Long Island Mac Arthur Airport NY
 40.78°N 73.09°W (Elev. 49 ft)
Last Update:
9:20 pm EST Jan 17, 2025
Forecast Valid:
2am EST Jan 18, 2025-6pm EST Jan 24, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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