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

50°F

10°C

Humidity 86%
Wind Speed SW 9 mph
Barometer 30.02 in (1016.6 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Wind Chill46°F (8°C)
Last update 31 Mar 4:56 am EDT
Extended Forecast for

Blue Point NY

  • Overnight

    Overnight: Showers likely. Mostly cloudy, with a low around 47. Southwest wind around 13 mph. Chance of precipitation is 60%.

    Low: 47 °F

    Showers
    Likely

  • Tuesday

    Tuesday: Showers likely, mainly before 11am. Partly sunny, with a high near 59. Southwest wind 13 to 16 mph. Chance of precipitation is 60%.

    High: 59 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after 2am. Mostly cloudy, with a low around 50. Southwest wind around 15 mph.

    Low: 50 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers before 8am, then a slight chance of rain between 8am and 2pm, then rain likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 61. Southwest wind 10 to 13 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 61 °F

    Slight Chance
    Rain then
    Rain Likely

  • Wednesday Night

    Wednesday Night: Rain and possibly a thunderstorm. Low around 41. Northeast wind 8 to 13 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 41 °F

    Rain

  • Thursday

    Thursday: A 30 percent chance of rain before 2pm. Cloudy, with a high near 46.

    High: 46 °F

    Chance Rain

  • Thursday Night

    Thursday Night: A chance of rain between 8pm and 2am. Cloudy, with a low around 39. Chance of precipitation is 30%.

    Low: 39 °F

    Chance Rain

  • Friday

    Friday: Mostly cloudy, with a high near 56.

    High: 56 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 48.

    Low: 48 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Showers likely. Mostly cloudy, with a low around 47. Southwest wind around 13 mph. Chance of precipitation is 60%.
Tuesday
Showers likely, mainly before 11am. Partly sunny, with a high near 59. Southwest wind 13 to 16 mph. Chance of precipitation is 60%.
Tuesday Night
A 20 percent chance of showers after 2am. Mostly cloudy, with a low around 50. Southwest wind around 15 mph.
Wednesday
A slight chance of showers before 8am, then a slight chance of rain between 8am and 2pm, then rain likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 61. Southwest wind 10 to 13 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Rain and possibly a thunderstorm. Low around 41. Northeast wind 8 to 13 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
A 30 percent chance of rain before 2pm. Cloudy, with a high near 46.
Thursday Night
A chance of rain between 8pm and 2am. Cloudy, with a low around 39. Chance of precipitation is 30%.
Friday
Mostly cloudy, with a high near 56.
Friday Night
Mostly cloudy, with a low around 48.
Saturday
Partly sunny, with a high near 60.
Saturday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 46.
Sunday
A 40 percent chance of rain. Mostly cloudy, with a high near 58.
Sunday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 43.
Monday
A 30 percent chance of rain. Mostly cloudy, with a high near 51.
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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:
2:46 am EDT Mar 31, 2026
Forecast Valid:
5am EDT Mar 31, 2026-6pm EDT Apr 6, 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