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.

Overcast

45°F

7°C

Humidity 71%
Wind Speed S 17 G 28 mph
Barometer 29.83 in (1010.3 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 20 Mar 6:56 pm EDT
Extended Forecast for

5 Miles SSE Blue Point NY

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 1am, then showers likely. Patchy fog after 3am. Low around 41. Southwest wind 13 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 41 °F

    Showers and
    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 7am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 51. North wind 9 to 14 mph.

    High: 51 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 39. Light and variable wind becoming south 5 to 7 mph in the evening.

    Low: 39 °F

    Increasing
    Clouds

  • Sunday

    Sunday: A 20 percent chance of rain after 2pm. Mostly cloudy, with a high near 51. South wind 11 to 16 mph.

    High: 51 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Sunday Night

    Sunday Night: Rain likely, mainly after 8pm. Cloudy, with a low around 40. Southwest wind 13 to 16 mph becoming north after midnight. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 40 °F

    Rain Likely

  • Monday

    Monday: A 40 percent chance of rain before 2pm. Mostly cloudy, with a high near 44.

    High: 44 °F

    Chance Rain

  • Monday Night

    Monday Night: Partly cloudy, with a low around 34. Breezy.

    Low: 34 °F

    Partly Cloudy
    and Breezy

  • Tuesday

    Tuesday: Sunny, with a high near 41.

    High: 41 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Showers and possibly a thunderstorm before 1am, then showers likely. Patchy fog after 3am. Low around 41. Southwest wind 13 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Saturday
Patchy fog before 7am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 51. North wind 9 to 14 mph.
Saturday Night
Increasing clouds, with a low around 39. Light and variable wind becoming south 5 to 7 mph in the evening.
Sunday
A 20 percent chance of rain after 2pm. Mostly cloudy, with a high near 51. South wind 11 to 16 mph.
Sunday Night
Rain likely, mainly after 8pm. Cloudy, with a low around 40. Southwest wind 13 to 16 mph becoming north after midnight. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Monday
A 40 percent chance of rain before 2pm. Mostly cloudy, with a high near 44.
Monday Night
Partly cloudy, with a low around 34. Breezy.
Tuesday
Sunny, with a high near 41.
Tuesday Night
Mostly cloudy, with a low around 37.
Wednesday
Partly sunny, with a high near 44. Breezy.
Wednesday Night
Partly cloudy, with a low around 34. Breezy.
Thursday
Mostly sunny, with a high near 46.
Thursday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 38. Windy.
Friday
A 40 percent chance of rain. Mostly cloudy, with a high near 47. Breezy.
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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:
3:15 pm EDT Mar 20, 2026
Forecast Valid:
7pm EDT Mar 20, 2026-6pm EDT Mar 27, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation