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.

Light Drizzle Fog

42°F

6°C

Humidity 100%
Wind Speed SE 7 mph
Barometer 30.01 in (1016.2 mb)
Dewpoint 42°F (6°C)
Visibility 0.50 mi
Wind Chill38°F (3°C)
Last update 19 Mar 11:56 pm EDT
Extended Forecast for

Islip Terrace NY

  • Overnight

    Overnight: Patchy drizzle. Areas of fog. Otherwise, cloudy, with a low around 40. Southeast wind around 5 mph.

    Low: 40 °F

    Patchy
    Drizzle and
    Areas Fog

  • Thursday

    Thursday: Patchy drizzle before 2pm. Areas of fog before 2pm. Otherwise, cloudy, with a high near 51. Light southeast wind increasing to 5 to 9 mph in the morning.

    High: 51 °F

    Patchy
    Drizzle and
    Areas Fog

  • Thursday Night

    Thursday Night: Showers. Low around 40. Southeast wind 3 to 6 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 40 °F

    Showers

  • Friday

    Friday: A 30 percent chance of showers before 2pm. Partly sunny, with a high near 50. Northwest wind 10 to 15 mph, with gusts as high as 36 mph.

    High: 50 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Mostly clear, with a low around 36. Northwest wind 10 to 17 mph.

    Low: 36 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 55.

    High: 55 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 32.

    Low: 32 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 48.

    High: 48 °F

    Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of rain after 2am. Mostly cloudy, with a low around 39.

    Low: 39 °F

    Partly Cloudy
    then Chance
    Rain

Detailed Forecast

Overnight
Patchy drizzle. Areas of fog. Otherwise, cloudy, with a low around 40. Southeast wind around 5 mph.
Thursday
Patchy drizzle before 2pm. Areas of fog before 2pm. Otherwise, cloudy, with a high near 51. Light southeast wind increasing to 5 to 9 mph in the morning.
Thursday Night
Showers. Low around 40. Southeast wind 3 to 6 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Friday
A 30 percent chance of showers before 2pm. Partly sunny, with a high near 50. Northwest wind 10 to 15 mph, with gusts as high as 36 mph.
Friday Night
Mostly clear, with a low around 36. Northwest wind 10 to 17 mph.
Saturday
Mostly sunny, with a high near 55.
Saturday Night
Partly cloudy, with a low around 32.
Sunday
Sunny, with a high near 48.
Sunday Night
A 30 percent chance of rain after 2am. Mostly cloudy, with a low around 39.
Monday
Rain likely, mainly after 8am. Mostly cloudy, with a high near 52. Chance of precipitation is 70%.
Monday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 40.
Tuesday
Mostly sunny, with a high near 53.
Tuesday Night
Partly cloudy, with a low around 35.
Wednesday
Mostly sunny, with a high near 49.
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ABOUT THIS FORECAST

 
Point Forecast:
Islip Terrace NY
 40.75°N 73.18°W (Elev. 30 ft)
Last Update:
12:34 am EDT Mar 20, 2025
Forecast Valid:
2am EDT Mar 20, 2025-6pm EDT Mar 26, 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