Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Light Drizzle

48°F

9°C

Humidity 100%
Wind Speed Calm
Barometer 29.76 in (1007.7 mb)
Dewpoint 48°F (9°C)
Visibility 0.50 mi
Last update 19 Apr 7:56 am EDT
Extended Forecast for

Islip Terrace NY

Freeze Watch April 21, 12:00am until April 21, 09:00am
Click here for hazard details and duration
Freeze Watch
  • Today

    Today: Showers, mainly between 11am and 5pm.  Patchy fog before 11am. Temperature rising to near 52 by 10am, then falling to around 47 during the remainder of the day. South wind 5 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 26 mph.  Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 52 °F

    Showers and
    Patchy Fog

  • Tonight

    Tonight: A 30 percent chance of showers before 8pm.  Mostly cloudy during the early evening, then gradual clearing, with a low around 39. West wind around 6 mph becoming calm  after midnight.

    Low: 39 °F

    Chance
    Showers then
    Mostly Clear

  • Monday

    Monday: A 30 percent chance of showers.  Partly sunny, with a high near 52. Northwest wind 5 to 9 mph.

    High: 52 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 33. North wind 6 to 8 mph.

    Low: 33 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 51. North wind around 6 mph becoming southwest in the afternoon.

    High: 51 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 40.

    Low: 40 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Partly sunny, with a high near 58.

    High: 58 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny

Detailed Forecast

Today
Showers, mainly between 11am and 5pm. Patchy fog before 11am. Temperature rising to near 52 by 10am, then falling to around 47 during the remainder of the day. South wind 5 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Tonight
A 30 percent chance of showers before 8pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 39. West wind around 6 mph becoming calm after midnight.
Monday
A 30 percent chance of showers. Partly sunny, with a high near 52. Northwest wind 5 to 9 mph.
Monday Night
Partly cloudy, with a low around 33. North wind 6 to 8 mph.
Tuesday
Sunny, with a high near 51. North wind around 6 mph becoming southwest in the afternoon.
Tuesday Night
Increasing clouds, with a low around 40.
Wednesday
Partly sunny, with a high near 58.
Wednesday Night
Partly cloudy, with a low around 44.
Thursday
Mostly sunny, with a high near 64.
Thursday Night
Partly cloudy, with a low around 46.
Friday
Mostly sunny, with a high near 59.
Friday Night
Partly cloudy, with a low around 45.
Saturday
A 30 percent chance of showers. Partly sunny, with a high near 60.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Islip Terrace NY
 40.75°N 73.18°W (Elev. 30 ft)
4:26 am EDT Apr 19, 2026
8am EDT Apr 19, 2026-6pm EDT Apr 25, 2026
 
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