Hazardous Weather Conditions
Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
A Few Clouds
77°F
25°C
| Humidity | 94% |
| Wind Speed | SW 5 mph |
| Barometer | 30.05 in (1017.6 mb) |
| Dewpoint | 75°F (24°C) |
| Visibility | 10.00 mi |
| Heat Index | 78°F (26°C) |
| Last update | 15 Jul 10:56 pm EDT |
Extended Forecast for
Head of the Harbor NY
Heat Advisory July 16, 11:00am until July 17, 10:00pm
Tonight
Low: 73 °F
Patchy Fog
Wednesday
High: 88 °F
Mostly Sunny
Wednesday Night
Low: 74 °F
Chance
T-stormsThursday
High: 88 °F
Showers
LikelyThursday Night
Low: 76 °F
Showers
Likely then
Partly CloudyFriday
High: 89 °F
Mostly Sunny
Friday Night
Low: 69 °F
Partly Cloudy
Saturday
High: 84 °F
Sunny
Saturday Night
Low: 70 °F
Partly Cloudy
Detailed Forecast
Tonight
Patchy fog after midnight. Otherwise, partly cloudy, with a low around 73. Calm wind.
Wednesday
Mostly sunny, with a high near 88. Heat index values as high as 96. Calm wind becoming south 5 to 7 mph in the afternoon.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 74. South wind 6 to 8 mph.
Thursday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 88. Heat index values as high as 99. Southwest wind 6 to 11 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers likely and possibly a thunderstorm before 8pm. Partly cloudy, with a low around 76. Southwest wind around 8 mph. Chance of precipitation is 60%.
Friday
Mostly sunny, with a high near 89.
Friday Night
Partly cloudy, with a low around 69.
Saturday
Sunny, with a high near 84.
Saturday Night
Partly cloudy, with a low around 70.
Sunday
A 50 percent chance of showers after 8am. Partly sunny, with a high near 85.
Sunday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 71.
Monday
Mostly sunny, with a high near 85.
Monday Night
Partly cloudy, with a low around 69.
Tuesday
Mostly sunny, with a high near 83.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Head of the Harbor NY
40.9°N 73.15°W (Elev. 157 ft)
40.9°N 73.15°W (Elev. 157 ft)
3:16 pm EDT Jul 15, 2025
11pm EDT Jul 15, 2025-6pm EDT Jul 22, 2025
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