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.

Light Rain Fog/Mist

63°F

17°C

Humidity 97%
Wind Speed NE 14 mph
Barometer 29.73 in (1006.6 mb)
Dewpoint 62°F (17°C)
Visibility 1.50 mi
Last update 27 Sep 7:56 pm EDT
Extended Forecast for

Selden NY

Coastal Flood Advisory September 27, 10:00pm until September 28, 02:00pm
Click here for hazard details and duration
Coastal Flood Advisory

  • Tonight

    Tonight: Rain and possibly a thunderstorm. Low around 60. Northeast wind 11 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 60 °F

    Rain

  • Monday

    Monday: Rain, mainly before 5pm. High near 64. Northeast wind around 14 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 64 °F

    Rain

  • Monday Night

    Monday Night: A 30 percent chance of rain before 8pm. Mostly cloudy, with a low around 56. Northwest wind 5 to 9 mph.

    Low: 56 °F

    Chance Rain
    then Mostly
    Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 69. Northwest wind around 7 mph.

    High: 69 °F

    Mostly Sunny

  • Tuesday Night

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

    Low: 58 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 71.

    High: 71 °F

    Mostly Sunny

  • Wednesday Night

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

    Low: 61 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 74.

    High: 74 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy

Detailed Forecast

Tonight
Rain and possibly a thunderstorm. Low around 60. Northeast wind 11 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Monday
Rain, mainly before 5pm. High near 64. Northeast wind around 14 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Monday Night
A 30 percent chance of rain before 8pm. Mostly cloudy, with a low around 56. Northwest wind 5 to 9 mph.
Tuesday
Mostly sunny, with a high near 69. Northwest wind around 7 mph.
Tuesday Night
Mostly cloudy, with a low around 58. Calm wind.
Wednesday
Mostly sunny, with a high near 71.
Wednesday Night
Partly cloudy, with a low around 61.
Thursday
Mostly sunny, with a high near 74.
Thursday Night
Partly cloudy, with a low around 64.
Friday
Mostly sunny, with a high near 72.
Friday Night
Mostly cloudy, with a low around 58.
Saturday
Partly sunny, with a high near 67.
Saturday Night
Partly cloudy, with a low around 55.
Sunday
A 30 percent chance of showers. Partly sunny, with a high near 66.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Selden NY
 40.86°N 73.04°W (Elev. 115 ft)
Last Update:
8:45 pm EDT Sep 27, 2026
Forecast Valid:
8pm EDT Sep 27, 2026-6pm EDT Oct 4, 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