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Hazardous Weather Conditions

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Light Rain Fog/Mist

52°F

11°C

Humidity 86%
Wind Speed E 5 mph
Barometer 30.47 in (1031.6 mb)
Dewpoint 48°F (9°C)
Visibility 6.00 mi
Wind Chill51°F (11°C)
Last update 23 May 6:56 pm EDT
Extended Forecast for

Islip, Long Island Mac Arthur Airport NY

High Surf Advisory May 24, 06:00am until May 24, 09:00pm
Click here for hazard details and duration
High Surf Advisory

  • Tonight

    Tonight: Rain. Low around 50. East wind 10 to 14 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 50 °F

    Rain

  • Sunday

    Sunday: Rain. High near 59. Breezy, with an east wind 17 to 21 mph, with gusts as high as 32 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

    High: 59 °F

    Rain and
    Breezy

  • Sunday Night

    Sunday Night: Rain. Low around 55. Southeast wind around 6 mph becoming calm in the evening. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 55 °F

    Rain

  • Memorial Day

    Memorial Day: Showers likely, mainly before 8am. Mostly cloudy, with a high near 73. Light and variable wind becoming west around 6 mph in the morning. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 73 °F

    Showers
    Likely

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 58. Calm wind.

    Low: 58 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 75.

    High: 75 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 60.

    Low: 60 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 80.

    High: 80 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 61.

    Low: 61 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Rain. Low around 50. East wind 10 to 14 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Sunday
Rain. High near 59. Breezy, with an east wind 17 to 21 mph, with gusts as high as 32 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Sunday Night
Rain. Low around 55. Southeast wind around 6 mph becoming calm in the evening. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Memorial Day
Showers likely, mainly before 8am. Mostly cloudy, with a high near 73. Light and variable wind becoming west around 6 mph in the morning. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
Mostly cloudy, with a low around 58. Calm wind.
Tuesday
Mostly cloudy, with a high near 75.
Tuesday Night
Mostly cloudy, with a low around 60.
Wednesday
Partly sunny, with a high near 80.
Wednesday Night
Mostly cloudy, with a low around 61.
Thursday
Mostly sunny, with a high near 77.
Thursday Night
Partly cloudy, with a low around 56.
Friday
Mostly sunny, with a high near 72.
Friday Night
Partly cloudy, with a low around 54.
Saturday
Mostly sunny, with a high near 71.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Islip, Long Island Mac Arthur Airport NY
 40.78°N 73.09°W (Elev. 49 ft)
Last Update:
2:21 pm EDT May 23, 2026
Forecast Valid:
7pm EDT May 23, 2026-6pm EDT May 30, 2026
 
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