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Hazardous Weather Conditions
Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Partly Cloudy
77°F
25°C
| Humidity | 90% |
| Wind Speed | SW 5 mph |
| Barometer | 29.94 in (1013.6 mb) |
| Dewpoint | 74°F (23°C) |
| Visibility | 8.00 mi |
| Heat Index | 78°F (26°C) |
| Last update | 8 Jul 4:56 am EDT |
Extended Forecast for
Port Jefferson NY
Flood Watch July 8, 02:00pm until July 9, 02:00am
Heat Advisory July 8, 10:00am until July 8, 08:00pm
Today
High: 92 °F
Patchy Fog
then Chance
T-stormsTonight
Low: 73 °F
Heavy Rain
Wednesday
High: 86 °F
Slight Chance
Showers then
Chance
T-stormsWednesday Night
Low: 72 °F
Chance
T-stormsThursday
High: 82 °F
Showers
LikelyThursday Night
Low: 70 °F
Showers
LikelyFriday
High: 82 °F
Mostly Cloudy
Friday Night
Low: 70 °F
Mostly Cloudy
Saturday
High: 84 °F
Partly Sunny
Detailed Forecast
Today
A 30 percent chance of showers and thunderstorms after 2pm. Patchy fog before 10am. Otherwise, mostly sunny, with a high near 92. Heat index values as high as 98. West wind 5 to 8 mph.
Tonight
Showers likely and possibly a thunderstorm before 2am, then a chance of showers and thunderstorms after 2am. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 73. Southwest wind around 6 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 86. West wind 3 to 6 mph. Chance of precipitation is 30%.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. South wind around 6 mph. Chance of precipitation is 50%.
Thursday
A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 82. Southeast wind 5 to 7 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers between 8pm and 2am. Cloudy, with a low around 70. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
Mostly cloudy, with a high near 82.
Friday Night
Mostly cloudy, with a low around 70.
Saturday
Partly sunny, with a high near 84.
Saturday Night
Mostly cloudy, with a low around 71.
Sunday
Partly sunny, with a high near 84.
Sunday Night
Mostly cloudy, with a low around 71.
Monday
A 30 percent chance of showers. Partly sunny, with a high near 84.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Port Jefferson NY
40.95°N 73.05°W (Elev. 151 ft)
40.95°N 73.05°W (Elev. 151 ft)
4:54 am EDT Jul 8, 2025
5am EDT Jul 8, 2025-6pm EDT Jul 14, 2025
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