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 | 60% |
| Wind Speed | N 7 mph |
| Barometer | 30.11 in (1019.3 mb) |
| Dewpoint | 62°F (17°C) |
| Visibility | 10.00 mi |
| Heat Index | 79°F (26°C) |
| Last update | 21 Jun 7:56 am EDT |
Extended Forecast for
Port Jefferson NY
Extreme Heat Watch June 22, 12:00pm until June 24, 08:00pm
Today
High: 86 °F
Sunny
Tonight
Low: 70 °F
Partly Cloudy
Sunday
High: 91 °F
Slight Chance
T-stormsSunday Night
Low: 74 °F
Mostly Clear
Monday
High: 93 °F
Sunny
Monday Night
Low: 72 °F
Mostly Clear
Tuesday
High: 94 °F
Sunny
Tuesday Night
Low: 73 °F
Partly Cloudy
Wednesday
High: 87 °F
Mostly Sunny
Detailed Forecast
Today
Sunny, with a high near 86. West wind 3 to 7 mph.
Tonight
Partly cloudy, with a low around 70. South wind around 7 mph.
Sunday
A 20 percent chance of showers and thunderstorms before 2pm. Mostly sunny, with a high near 91. Heat index values as high as 95. Southwest wind 10 to 14 mph.
Sunday Night
Mostly clear, with a low around 74. West wind 6 to 9 mph.
Monday
Sunny, with a high near 93. Northwest wind around 7 mph.
Monday Night
Mostly clear, with a low around 72.
Tuesday
Sunny, with a high near 94.
Tuesday Night
Partly cloudy, with a low around 73.
Wednesday
Mostly sunny, with a high near 87.
Wednesday Night
Mostly cloudy, with a low around 66.
Thursday
Partly sunny, with a high near 80.
Thursday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
Friday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 79.
Additional Forecasts and Information
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Point Forecast:
Port Jefferson NY
40.93°N 73.06°W (Elev. 161 ft)
40.93°N 73.06°W (Elev. 161 ft)
3:17 am EDT Jun 21, 2025
8am EDT Jun 21, 2025-6pm EDT Jun 27, 2025
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