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

47°F

8°C

Humidity 86%
Wind Speed S 9 G 21 mph
Barometer 29.81 in (1009.3 mb)
Dewpoint 43°F (6°C)
Visibility 9.00 mi
Wind Chill43°F (6°C)
Last update 22 Mar 12:56 pm EDT
Extended Forecast for

Blue Point NY

  • This Afternoon

    This Afternoon: A slight chance of rain before 2pm, then a chance of rain after 5pm. Mostly cloudy, with a high near 51. South wind around 11 mph. Chance of precipitation is 30%.

    High: 51 °F

    Chance Rain

  • Tonight

    Tonight: Rain likely, mainly between 8pm and 11pm, then showers after 11pm. Low around 39. South wind around 6 mph becoming north after midnight. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 39 °F

    Showers

  • Monday

    Monday: A 50 percent chance of rain before 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 45. North wind 11 to 14 mph.

    High: 45 °F

    Chance Rain

  • Monday Night

    Monday Night: Partly cloudy, with a low around 30. Wind chill values between 20 and 25. Northwest wind around 10 mph.

    Low: 30 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 43. North wind around 7 mph becoming west in the afternoon.

    High: 43 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 34.

    Low: 34 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 48.

    High: 48 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain after 2am. Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy
    then Chance
    Rain

  • Thursday

    Thursday: A 30 percent chance of rain. Mostly cloudy, with a high near 50.

    High: 50 °F

    Chance Rain

Detailed Forecast

This Afternoon
A slight chance of rain before 2pm, then a chance of rain after 5pm. Mostly cloudy, with a high near 51. South wind around 11 mph. Chance of precipitation is 30%.
Tonight
Rain likely, mainly between 8pm and 11pm, then showers after 11pm. Low around 39. South wind around 6 mph becoming north after midnight. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Monday
A 50 percent chance of rain before 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 45. North wind 11 to 14 mph.
Monday Night
Partly cloudy, with a low around 30. Wind chill values between 20 and 25. Northwest wind around 10 mph.
Tuesday
Sunny, with a high near 43. North wind around 7 mph becoming west in the afternoon.
Tuesday Night
Increasing clouds, with a low around 34.
Wednesday
Mostly cloudy, with a high near 48.
Wednesday Night
A 30 percent chance of rain after 2am. Mostly cloudy, with a low around 37.
Thursday
A 30 percent chance of rain. Mostly cloudy, with a high near 50.
Thursday Night
Rain likely, mainly after 2am. Mostly cloudy, with a low around 40. Chance of precipitation is 60%.
Friday
Rain likely. Partly sunny, with a high near 50. Chance of precipitation is 60%.
Friday Night
Partly cloudy, with a low around 26.
Saturday
Sunny, with a high near 41.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Blue Point NY
 40.75°N 73.04°W (Elev. 30 ft)
Last Update:
2:51 am EDT Mar 22, 2026
Forecast Valid:
1pm EDT Mar 22, 2026-6pm EDT Mar 28, 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