Hazardous Weather Conditions
Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Light Rain
75°F
24°C
| Humidity | 90% |
| Wind Speed | N 7 mph |
| Barometer | 30.08 in (1018.5 mb) |
| Dewpoint | 72°F (22°C) |
| Visibility | 10.00 mi |
| Last update | 14 Jul 9:56 pm EDT |
Extended Forecast for
Lake Ronkonkoma NY
Flood Advisory until July 14, 11:00pm
NOW until 11:00pm Mon
Flood Advisory
Tonight
Low: 73 °F
Showers
Likely and
Patchy FogTuesday
High: 83 °F
Showers
Likely and
Patchy Fog
then Slight
Chance
T-stormsTuesday Night
Low: 72 °F
Partly Cloudy
then Patchy
FogWednesday
High: 88 °F
Slight Chance
T-storms and
Patchy FogWednesday Night
Low: 74 °F
Chance
T-stormsThursday
High: 90 °F
Chance
Showers then
Chance
T-stormsThursday Night
Low: 76 °F
Chance
T-storms then
Partly CloudyFriday
High: 91 °F
Mostly Sunny
then Chance
T-storms
Detailed Forecast
Tonight
Showers likely and possibly a thunderstorm before 11pm, then a chance of showers and thunderstorms between 11pm and 2am, then showers likely and possibly a thunderstorm after 2am. Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 73. South wind 3 to 5 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
Showers likely and possibly a thunderstorm before 8am, then a chance of showers and thunderstorms, mainly between 8am and 11am. Patchy fog before 10am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 83. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
Patchy fog after midnight. Otherwise, partly cloudy, with a low around 72. Southwest wind 3 to 6 mph.
Wednesday
A slight chance of showers, with thunderstorms also possible after 2pm. Patchy fog before 11am. Otherwise, partly sunny, with a high near 88. Heat index values as high as 95. Calm wind becoming south 5 to 9 mph in the morning. Chance of precipitation is 20%.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 74. Southwest wind 6 to 8 mph.
Thursday
A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 90. Chance of precipitation is 30%.
Thursday Night
A chance of thunderstorms before 8pm. Partly cloudy, with a low around 76. Chance of precipitation is 30%.
Friday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 91.
Friday Night
A 30 percent chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 71.
Saturday
Mostly sunny, with a high near 86.
Saturday Night
Partly cloudy, with a low around 71.
Sunday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 84.
Sunday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71.
Monday
Mostly sunny, with a high near 86.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Lake Ronkonkoma NY
40.83°N 73.11°W (Elev. 98 ft)
40.83°N 73.11°W (Elev. 98 ft)
2:29 pm EDT Jul 14, 2025
10pm EDT Jul 14, 2025-6pm EDT Jul 21, 2025
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