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.

Mostly Cloudy

36°F

2°C

Humidity 76%
Wind Speed Calm
Barometer 30.27 in (1025.2 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Last update 24 Nov 11:56 pm EST
Extended Forecast for

5 Miles SSE Blue Point NY

  • Overnight

    Overnight: Mostly cloudy, with a low around 39. Southwest wind 3 to 8 mph.

    Low: 39 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 40 percent chance of rain after 1pm. Cloudy, with a high near 57. Southwest wind 10 to 16 mph.

    High: 57 °F

    Cloudy then
    Chance Rain

  • Tuesday Night

    Tuesday Night: Rain. Temperature rising to around 54 by 1am. Breezy, with a south wind 16 to 22 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 50 °F⇑

    Rain and
    Breezy

  • Wednesday

    Wednesday: Showers likely, mainly before noon. Cloudy, with a high near 59. Southwest wind 14 to 17 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 59 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 37. Breezy, with a west wind 17 to 25 mph.

    Low: 37 °F

    Breezy.
    Slight Chance
    Showers then
    Partly Cloudy

  • Thanksgiving Day

    Thanksgiving Day: Mostly sunny, with a high near 45. Windy.

    High: 45 °F

    Mostly Sunny
    and Windy

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 37. Windy.

    Low: 37 °F

    Mostly Clear
    and Windy

  • Friday

    Friday: Mostly sunny, with a high near 43. Windy.

    High: 43 °F

    Mostly Sunny
    and Windy

  • Friday Night

    Friday Night: Mostly clear, with a low around 36. Windy.

    Low: 36 °F

    Mostly Clear
    and Windy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 39. Southwest wind 3 to 8 mph.
Tuesday
A 40 percent chance of rain after 1pm. Cloudy, with a high near 57. Southwest wind 10 to 16 mph.
Tuesday Night
Rain. Temperature rising to around 54 by 1am. Breezy, with a south wind 16 to 22 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
Showers likely, mainly before noon. Cloudy, with a high near 59. Southwest wind 14 to 17 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 37. Breezy, with a west wind 17 to 25 mph.
Thanksgiving Day
Mostly sunny, with a high near 45. Windy.
Thursday Night
Mostly clear, with a low around 37. Windy.
Friday
Mostly sunny, with a high near 43. Windy.
Friday Night
Mostly clear, with a low around 36. Windy.
Saturday
Sunny, with a high near 42. Breezy.
Saturday Night
Mostly cloudy, with a low around 37.
Sunday
Partly sunny, with a high near 49.
Sunday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 44.
Monday
A 40 percent chance of rain. Mostly cloudy, with a high near 52.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSE Blue Point NY
 40.68°N 72.99°W (Elev. 0 ft)
Last Update:
3:30 pm EST Nov 24, 2025
Forecast Valid:
12am EST Nov 25, 2025-6pm EST Dec 1, 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