Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Partly Cloudy

49°F

9°C

Humidity 38%
Wind Speed NW 12 G 22 mph
Barometer 30.09 in (1019.0 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 18 Nov 1:56 pm EST
Extended Forecast for

Central Islip NY

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 46. West wind around 10 mph, with gusts as high as 20 mph.

    High: 46 °F

    Mostly Sunny

  • Tonight

    Tonight: Rain likely, mainly after 4am.  Increasing clouds, with a low around 35. West wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 60%.

    Low: 35 °F

    Mostly Cloudy
    then Rain
    Likely

  • Wednesday

    Wednesday: Rain likely, mainly before 7am.  Cloudy, then gradually becoming mostly sunny, with a high near 48. Calm wind becoming north around 6 mph.  Chance of precipitation is 60%.

    High: 48 °F

    Rain Likely
    then Slight
    Chance Rain

  • Wednesday Night

    Wednesday Night: Areas of frost.  Otherwise, mostly cloudy, with a low around 34. Light north wind.

    Low: 34 °F

    Areas Frost

  • Thursday

    Thursday: Partly sunny, with a high near 50. Northeast wind 3 to 6 mph.

    High: 50 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 42.

    Low: 42 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 55.

    High: 55 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 51.

    High: 51 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 46. West wind around 10 mph, with gusts as high as 20 mph.
Tonight
Rain likely, mainly after 4am. Increasing clouds, with a low around 35. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%.
Wednesday
Rain likely, mainly before 7am. Cloudy, then gradually becoming mostly sunny, with a high near 48. Calm wind becoming north around 6 mph. Chance of precipitation is 60%.
Wednesday Night
Areas of frost. Otherwise, mostly cloudy, with a low around 34. Light north wind.
Thursday
Partly sunny, with a high near 50. Northeast wind 3 to 6 mph.
Thursday Night
Mostly cloudy, with a low around 42.
Friday
Mostly cloudy, with a high near 55.
Friday Night
Mostly cloudy, with a low around 40.
Saturday
Partly sunny, with a high near 51.
Saturday Night
Partly cloudy, with a low around 35.
Sunday
Mostly sunny, with a high near 51.
Sunday Night
Partly cloudy, with a low around 38.
Monday
Mostly sunny, with a high near 53.
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ABOUT THIS FORECAST

 
Point Forecast:
Central Islip NY
 40.79°N 73.2°W (Elev. 98 ft)
12:46 pm EST Nov 18, 2025
2pm EST Nov 18, 2025-6pm EST Nov 24, 2025
 
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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