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.

Fair

34°F

1°C

Humidity 54%
Wind Speed W 10 mph
Barometer 30.20 in (1022.7 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill26°F (-3°C)
Last update 29 Nov 1:56 am EST
Extended Forecast for

5 Miles SSE Blue Point NY

  • Overnight

    Overnight: Mostly clear, with a low around 36. Windy, with a west wind 24 to 26 mph.

    Low: 36 °F

    Mostly Clear
    and Windy

  • Saturday

    Saturday: Sunny, with a high near 43. Breezy, with a northwest wind 17 to 22 mph decreasing to 11 to 16 mph in the afternoon.

    High: 43 °F

    Sunny and
    Breezy then
    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a temperature falling to near 39 by 8pm, then rising to around 44 during the remainder of the night. Light and variable wind becoming south 6 to 11 mph after midnight.

    Low: 39 °F⇑

    Increasing
    Clouds

  • Sunday

    Sunday: Rain, mainly after 1pm. High near 53. Windy, with a south wind 17 to 26 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 53 °F

    Chance Rain
    and Breezy
    then Rain and
    Windy

  • Sunday Night

    Sunday Night: A 50 percent chance of rain before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 38. Windy, with a southwest wind 25 to 28 mph.

    Low: 38 °F

    Chance Rain
    and Windy

  • Monday

    Monday: Sunny, with a high near 41. Breezy.

    High: 41 °F

    Sunny and
    Breezy

  • Monday Night

    Monday Night: Increasing clouds, with a low around 35.

    Low: 35 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Rain, mainly after 1pm. High near 48. Chance of precipitation is 90%.

    High: 48 °F

    Chance Rain
    then Rain

  • Tuesday Night

    Tuesday Night: Rain likely, mainly before 1am. Mostly cloudy, with a low around 37. Breezy. Chance of precipitation is 70%.

    Low: 37 °F

    Rain Likely
    and Breezy

Detailed Forecast

Overnight
Mostly clear, with a low around 36. Windy, with a west wind 24 to 26 mph.
Saturday
Sunny, with a high near 43. Breezy, with a northwest wind 17 to 22 mph decreasing to 11 to 16 mph in the afternoon.
Saturday Night
Increasing clouds, with a temperature falling to near 39 by 8pm, then rising to around 44 during the remainder of the night. Light and variable wind becoming south 6 to 11 mph after midnight.
Sunday
Rain, mainly after 1pm. High near 53. Windy, with a south wind 17 to 26 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
A 50 percent chance of rain before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 38. Windy, with a southwest wind 25 to 28 mph.
Monday
Sunny, with a high near 41. Breezy.
Monday Night
Increasing clouds, with a low around 35.
Tuesday
Rain, mainly after 1pm. High near 48. Chance of precipitation is 90%.
Tuesday Night
Rain likely, mainly before 1am. Mostly cloudy, with a low around 37. Breezy. Chance of precipitation is 70%.
Wednesday
Mostly sunny, with a high near 41. Breezy.
Wednesday Night
Partly cloudy, with a low around 36.
Thursday
Partly sunny, with a high near 41. Breezy.
Thursday Night
Partly cloudy, with a low around 27. Blustery.
Friday
Partly sunny, with a high near 39.
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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:
1:05 am EST Nov 29, 2025
Forecast Valid:
2am EST Nov 29, 2025-6pm EST Dec 5, 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