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.

Light Rain Fog/Mist

57°F

14°C

Humidity 93%
Wind Speed NE 12 G 20 mph
Barometer 29.88 in (1011.9 mb)
Dewpoint 55°F (13°C)
Visibility 3.00 mi
Last update 11 Oct 8:56 pm EDT
Extended Forecast for

Saint James NY

  • Tonight

    Tonight: Rain and possibly a thunderstorm, mainly before midnight, then a chance of rain and thunderstorms after midnight. Low around 55. Northeast wind 11 to 17 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 55 °F

    Rain then
    Chance Rain

  • Columbus Day

    Columbus Day: Cloudy through mid morning, then gradual clearing, with a high near 70. North wind 7 to 11 mph.

    High: 70 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 56. North wind around 5 mph becoming calm in the evening.

    Low: 56 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 69. Light and variable wind becoming south 5 to 8 mph in the morning.

    High: 69 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and midnight. Partly cloudy, with a low around 62. Southwest wind around 9 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 62 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 54.

    Low: 54 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of showers after 2am. Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
Rain and possibly a thunderstorm, mainly before midnight, then a chance of rain and thunderstorms after midnight. Low around 55. Northeast wind 11 to 17 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Columbus Day
Cloudy through mid morning, then gradual clearing, with a high near 70. North wind 7 to 11 mph.
Monday Night
Mostly clear, with a low around 56. North wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 69. Light and variable wind becoming south 5 to 8 mph in the morning.
Tuesday Night
A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and midnight. Partly cloudy, with a low around 62. Southwest wind around 9 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Wednesday
Mostly sunny, with a high near 75.
Wednesday Night
Mostly cloudy, with a low around 54.
Thursday
Mostly sunny, with a high near 64.
Thursday Night
A 30 percent chance of showers after 2am. Partly cloudy, with a low around 50.
Friday
Showers likely, mainly after 8am. Mostly cloudy, with a high near 66. Chance of precipitation is 60%.
Friday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 47. Breezy.
Saturday
Partly sunny, with a high near 56. Breezy.
Saturday Night
Mostly cloudy, with a low around 38. Breezy.
Sunday
Mostly sunny, with a high near 53.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Saint James NY
 40.88°N 73.16°W (Elev. 148 ft)
Last Update:
3:33 pm EDT Oct 11, 2026
Forecast Valid:
9pm EDT Oct 11, 2026-6pm EDT Oct 18, 2026
 
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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