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.

Partly Cloudy

70°F

21°C

Humidity 79%
Wind Speed SW 12 mph
Barometer 30.02 in (1016.4 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 12 Jun 6:56 am EDT
Extended Forecast for

Saint James NY

  • Today

    Today: Sunny, with a high near 86. West wind 8 to 13 mph.

    High: 86 °F

    Sunny

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before 11pm, then a chance of showers after 2am. Mostly cloudy, with a low around 63. West wind 5 to 7 mph becoming light and variable in the evening. Chance of precipitation is 30%.

    Low: 63 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers, mainly before 8am. Partly sunny, with a high near 75. Northeast wind 5 to 8 mph becoming east in the afternoon.

    High: 75 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A 50 percent chance of showers, mainly after 2am. Mostly cloudy, with a low around 61. East wind 6 to 8 mph.

    Low: 61 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Saturday

    Saturday: A 50 percent chance of showers. Cloudy, with a high near 68. Northeast wind 7 to 11 mph.

    High: 68 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A 30 percent chance of showers. Cloudy, with a low around 59.

    Low: 59 °F

    Chance
    Showers

  • Sunday

    Sunday: A 30 percent chance of showers. Mostly cloudy, with a high near 72.

    High: 72 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A 30 percent chance of showers. Cloudy, with a low around 60.

    Low: 60 °F

    Chance
    Showers

  • Monday

    Monday: A 30 percent chance of showers. Mostly cloudy, with a high near 72.

    High: 72 °F

    Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 86. West wind 8 to 13 mph.
Tonight
A slight chance of showers and thunderstorms before 11pm, then a chance of showers after 2am. Mostly cloudy, with a low around 63. West wind 5 to 7 mph becoming light and variable in the evening. Chance of precipitation is 30%.
Friday
A 30 percent chance of showers, mainly before 8am. Partly sunny, with a high near 75. Northeast wind 5 to 8 mph becoming east in the afternoon.
Friday Night
A 50 percent chance of showers, mainly after 2am. Mostly cloudy, with a low around 61. East wind 6 to 8 mph.
Saturday
A 50 percent chance of showers. Cloudy, with a high near 68. Northeast wind 7 to 11 mph.
Saturday Night
A 30 percent chance of showers. Cloudy, with a low around 59.
Sunday
A 30 percent chance of showers. Mostly cloudy, with a high near 72.
Sunday Night
A 30 percent chance of showers. Cloudy, with a low around 60.
Monday
A 30 percent chance of showers. Mostly cloudy, with a high near 72.
Monday Night
Mostly cloudy, with a low around 60.
Tuesday
Mostly cloudy, with a high near 75.
Tuesday Night
Mostly cloudy, with a low around 62.
Wednesday
A 30 percent chance of showers. Mostly sunny, with a high near 78.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Saint James NY
 40.88°N 73.16°W (Elev. 148 ft)
Last Update:
3:53 am EDT Jun 12, 2025
Forecast Valid:
7am EDT Jun 12, 2025-6pm EDT Jun 18, 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