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.

A Few Clouds

33°F

1°C

Humidity 42%
Wind Speed S 12 mph
Barometer 30.40 in (1029.5 mb)
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 18 Mar 4:56 pm EDT
Extended Forecast for

Patchogue NY

  • Tonight

    Tonight: Increasing clouds, with a low around 26. South wind 5 to 10 mph becoming light in the evening.

    Low: 26 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly sunny, with a high near 40. Calm wind becoming south around 6 mph in the afternoon.

    High: 40 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 33. Calm wind.

    Low: 33 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 48. Calm wind becoming south 5 to 8 mph in the afternoon.

    High: 48 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Rain likely, mainly after midnight. Mostly cloudy, with a low around 39. South wind around 7 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 39 °F

    Chance Rain
    then Rain
    Likely

  • Saturday

    Saturday: A 30 percent chance of rain before 8am. Partly sunny, with a high near 51.

    High: 51 °F

    Chance Rain
    then Partly
    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 39.

    Low: 39 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 53.

    High: 53 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: A 30 percent chance of rain. Mostly cloudy, with a low around 35.

    Low: 35 °F

    Chance Rain

Detailed Forecast

Tonight
Increasing clouds, with a low around 26. South wind 5 to 10 mph becoming light in the evening.
Thursday
Mostly sunny, with a high near 40. Calm wind becoming south around 6 mph in the afternoon.
Thursday Night
Mostly cloudy, with a low around 33. Calm wind.
Friday
Mostly sunny, with a high near 48. Calm wind becoming south 5 to 8 mph in the afternoon.
Friday Night
Rain likely, mainly after midnight. Mostly cloudy, with a low around 39. South wind around 7 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
A 30 percent chance of rain before 8am. Partly sunny, with a high near 51.
Saturday Night
Mostly cloudy, with a low around 39.
Sunday
Mostly cloudy, with a high near 53.
Sunday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 35.
Monday
Mostly sunny, with a high near 47.
Monday Night
Mostly clear, with a low around 28.
Tuesday
Mostly sunny, with a high near 41.
Tuesday Night
Mostly cloudy, with a low around 32.
Wednesday
Partly sunny, with a high near 46.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Patchogue NY
 40.77°N 73°W (Elev. 43 ft)
Last Update:
5:35 pm EDT Mar 18, 2026
Forecast Valid:
5pm EDT Mar 18, 2026-6pm EDT Mar 25, 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