Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Rain Fog/Mist

9°C

48°F

Humidity 93%
Wind Speed E 20 km/h
Barometer 1011.1 mb (29.86 in)
Dewpoint 8°C (46°F)
Visibility 10 km
Wind Chill6°C (43°F)
Last update 22 May 3:56 am EDT
Extended Forecast for

Great River NY

Coastal Flood Advisory May 22, 02:00pm until May 22, 11:00pm
Click here for hazard details and duration
Coastal Flood Advisory
  • Overnight

    Overnight: Rain.  Low around 9. Breezy, with an east wind 29 to 32 km/h.  Chance of precipitation is 100%. New precipitation amounts between 5 and 7.5 mm possible.

    Low: 9 °C

    Rain and
    Breezy

  • Thursday

    Thursday: Rain.  Steady temperature around 11. Breezy, with a northeast wind 32 to 34 km/h, with gusts as high as 55 km/h.  Chance of precipitation is 100%. New precipitation amounts between 3 and 4 cm possible.

    High: 11 °C

    Rain and
    Breezy

  • Thursday Night

    Thursday Night: Rain likely before 7pm, then showers likely, mainly between 7pm and 2am.  Cloudy, with a low around 8. North wind 19 to 24 km/h decreasing to 13 to 18 km/h after midnight. Winds could gust as high as 40 km/h.  Chance of precipitation is 60%.

    Low: 8 °C

    Rain Likely

  • Friday

    Friday: A 30 percent chance of showers, mainly after 2pm.  Mostly cloudy, with a high near 15. West wind 10 to 16 km/h.

    High: 15 °C

    Chance
    Showers

  • Friday Night

    Friday Night: A 30 percent chance of showers, mainly before 8pm.  Mostly cloudy, with a low around 10. West wind 13 to 16 km/h.

    Low: 10 °C

    Chance
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 18.

    High: 18 °C

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 11.

    Low: 11 °C

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 19.

    High: 19 °C

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 11.

    Low: 11 °C

    Partly Cloudy

Detailed Forecast

Overnight
Rain. Low around 9. Breezy, with an east wind 29 to 32 km/h. Chance of precipitation is 100%. New precipitation amounts between 5 and 7.5 mm possible.
Thursday
Rain. Steady temperature around 11. Breezy, with a northeast wind 32 to 34 km/h, with gusts as high as 55 km/h. Chance of precipitation is 100%. New precipitation amounts between 3 and 4 cm possible.
Thursday Night
Rain likely before 7pm, then showers likely, mainly between 7pm and 2am. Cloudy, with a low around 8. North wind 19 to 24 km/h decreasing to 13 to 18 km/h after midnight. Winds could gust as high as 40 km/h. Chance of precipitation is 60%.
Friday
A 30 percent chance of showers, mainly after 2pm. Mostly cloudy, with a high near 15. West wind 10 to 16 km/h.
Friday Night
A 30 percent chance of showers, mainly before 8pm. Mostly cloudy, with a low around 10. West wind 13 to 16 km/h.
Saturday
Mostly sunny, with a high near 18.
Saturday Night
Partly cloudy, with a low around 11.
Sunday
Mostly sunny, with a high near 19.
Sunday Night
Partly cloudy, with a low around 11.
Memorial Day
Mostly sunny, with a high near 20.
Monday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 13.
Tuesday
A 40 percent chance of showers. Mostly cloudy, with a high near 18.
Tuesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 12.
Wednesday
A 30 percent chance of showers. Partly sunny, with a high near 18.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Great River NY
 40.72°N 73.16°W (Elev. 13 m)
3:21 am EDT May 22, 2025
4am EDT May 22, 2025-6pm EDT May 28, 2025
 
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Additional Resources

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