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.

Fog

35°F

2°C

Humidity 96%
Wind Speed Calm
Barometer 30.35 in (1027.6 mb)
Dewpoint 34°F (1°C)
Visibility 0.50 mi
Last update 7 Mar 2:56 am EST
Extended Forecast for

5 Miles SSE Blue Point NY

  • Overnight

    Overnight: Areas of fog. Otherwise, cloudy, with a low around 35. Light east wind.

    Low: 35 °F

    Areas Fog

  • Saturday

    Saturday: Areas of drizzle and fog between 7am and 1pm. Cloudy, with a high near 44. Southeast wind 5 to 10 mph becoming south in the afternoon.

    High: 44 °F

    Areas Drizzle
    and Areas Fog

  • Saturday Night

    Saturday Night: A 50 percent chance of showers after 10pm. Areas of fog before 4am. Otherwise, cloudy, with a low around 41. Breezy, with a southwest wind 13 to 20 mph.

    Low: 41 °F

    Chance
    Showers and
    Areas Fog

  • Sunday

    Sunday: A 40 percent chance of rain. Cloudy, with a high near 50. Southwest wind 10 to 16 mph.

    High: 50 °F

    Chance Rain

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 39. West wind 7 to 10 mph.

    Low: 39 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 47.

    High: 47 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 41.

    Low: 41 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 49.

    High: 49 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 41.

    Low: 41 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Areas of fog. Otherwise, cloudy, with a low around 35. Light east wind.
Saturday
Areas of drizzle and fog between 7am and 1pm. Cloudy, with a high near 44. Southeast wind 5 to 10 mph becoming south in the afternoon.
Saturday Night
A 50 percent chance of showers after 10pm. Areas of fog before 4am. Otherwise, cloudy, with a low around 41. Breezy, with a southwest wind 13 to 20 mph.
Sunday
A 40 percent chance of rain. Cloudy, with a high near 50. Southwest wind 10 to 16 mph.
Sunday Night
Partly cloudy, with a low around 39. West wind 7 to 10 mph.
Monday
Sunny, with a high near 47.
Monday Night
Mostly cloudy, with a low around 41.
Tuesday
Mostly cloudy, with a high near 49.
Tuesday Night
Mostly cloudy, with a low around 41.
Wednesday
A 40 percent chance of rain before 1pm. Cloudy, with a high near 49. Breezy.
Wednesday Night
Rain likely. Cloudy, with a low around 43. Windy. Chance of precipitation is 60%.
Thursday
A 50 percent chance of rain. Cloudy, with a high near 48. Breezy.
Thursday Night
Partly cloudy, with a low around 32. Breezy.
Friday
Partly sunny, with a high near 41. Breezy.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSE Blue Point NY
 40.68°N 72.99°W (Elev. 0 ft)
Last Update:
2:47 am EST Mar 7, 2026
Forecast Valid:
3am EST Mar 7, 2026-6pm EDT Mar 13, 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