National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Fair

61°F

16°C

Humidity 70%
Wind Speed Calm
Barometer 29.82 in (1009.6 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 21 Jun 4:56 am EDT
Extended Forecast for

5 Miles SSE Bayport NY

  • Today

    Today: Sunny, with a high near 77. Light and variable wind becoming south 8 to 13 mph in the morning.

    High: 77 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 66. Southwest wind 5 to 7 mph becoming calm in the evening.

    Low: 66 °F

    Partly Cloudy

  • Monday

    Monday: Showers likely and possibly a thunderstorm, mainly after 2pm. Mostly cloudy, with a high near 73. Southeast wind 5 to 15 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 73 °F

    Showers
    Likely

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm. Low around 67. Breezy, with a southwest wind 15 to 21 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 67 °F

    Showers and
    Breezy

  • Tuesday

    Tuesday: Showers likely, mainly before 2pm. Mostly cloudy, with a high near 78. North wind around 10 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    High: 78 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 67.

    Low: 67 °F

    Chance
    Showers then
    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 77. Light and variable wind becoming south 8 to 13 mph in the morning.
Tonight
Partly cloudy, with a low around 66. Southwest wind 5 to 7 mph becoming calm in the evening.
Monday
Showers likely and possibly a thunderstorm, mainly after 2pm. Mostly cloudy, with a high near 73. Southeast wind 5 to 15 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night
Showers and possibly a thunderstorm. Low around 67. Breezy, with a southwest wind 15 to 21 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Tuesday
Showers likely, mainly before 2pm. Mostly cloudy, with a high near 78. North wind around 10 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday Night
A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 67.
Wednesday
Sunny, with a high near 76.
Wednesday Night
Mostly clear, with a low around 68.
Thursday
Sunny, with a high near 76.
Thursday Night
A 30 percent chance of showers after 2am. Partly cloudy, with a low around 68.
Friday
A 30 percent chance of showers. Partly sunny, with a high near 75.
Friday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 69.
Saturday
Mostly sunny, with a high near 79.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSE Bayport NY
 40.68°N 73.02°W (Elev. 0 ft)
Last Update:
2:19 am EDT Jun 21, 2026
Forecast Valid:
5am EDT Jun 21, 2026-6pm EDT Jun 27, 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