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.

Fair

66°F

19°C

Humidity 87%
Wind Speed SW 6 mph
Barometer 30.28 in (1025.4 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 6 Oct 12:56 am EDT
Extended Forecast for

Farmingville NY

  • Overnight

    Overnight: Patchy fog. Otherwise, increasing clouds, with a low around 58. Calm wind.

    Low: 58 °F

    Patchy Fog

  • Monday

    Monday: Cloudy through mid morning, then gradual clearing, with a high near 78. Calm wind becoming south 5 to 9 mph in the morning.

    High: 78 °F

    Gradual
    Clearing

  • Monday Night

    Monday Night: Mostly clear, with a low around 58. South wind 6 to 8 mph.

    Low: 58 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 78. Southwest wind 6 to 13 mph.

    High: 78 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Showers, mainly after 2am. Low around 59. South wind around 11 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 59 °F

    Chance
    Showers then
    Showers

  • Wednesday

    Wednesday: Showers, mainly before 2pm. High near 70. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 70 °F

    Showers

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers before 8pm. Mostly clear, with a low around 48.

    Low: 48 °F

    Chance
    Showers then
    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

Detailed Forecast

Overnight
Patchy fog. Otherwise, increasing clouds, with a low around 58. Calm wind.
Monday
Cloudy through mid morning, then gradual clearing, with a high near 78. Calm wind becoming south 5 to 9 mph in the morning.
Monday Night
Mostly clear, with a low around 58. South wind 6 to 8 mph.
Tuesday
Mostly sunny, with a high near 78. Southwest wind 6 to 13 mph.
Tuesday Night
Showers, mainly after 2am. Low around 59. South wind around 11 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
Showers, mainly before 2pm. High near 70. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Wednesday Night
A 30 percent chance of showers before 8pm. Mostly clear, with a low around 48.
Thursday
Sunny, with a high near 62.
Thursday Night
Mostly clear, with a low around 47.
Friday
Sunny, with a high near 64.
Friday Night
Partly cloudy, with a low around 50.
Saturday
Mostly sunny, with a high near 69.
Saturday Night
Partly cloudy, with a low around 52.
Sunday
Mostly sunny, with a high near 67.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Farmingville NY
 40.84°N 73.05°W (Elev. 197 ft)
Last Update:
2:01 pm EDT Oct 5, 2025
Forecast Valid:
1am EDT Oct 6, 2025-6pm EDT Oct 12, 2025
 
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