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Town of Smithtown, NYSmithtown, NY Weather Forecast
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Smithtown Weather Forecast
| TODAY | TONIGHT | LABOR DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT |
 |  |  |  | | | |  | |  | | |
| Chance of Showers | Mostly Clear | Sunny | Partly Cloudy | Sunny | Partly Cloudy | Mostly Sunny | Chance of Showers | Chance of Showers | Mostly Cloudy | Mostly Sunny | Mostly Clear |
| Hi: 71°FHi: 22°C | Lo: 59°FLo: 15°C | Hi: 79°FHi: 26°C | Lo: 60°FLo: 16°C | Hi: 79°FHi: 26°C | Lo: 65°FLo: 18°C | Hi: 79°FHi: 26°C | Lo: 70°FLo: 21°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 75°FHi: 24°C | Lo: 59°FLo: 15°C |
| POP: 20% | POP: 30% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 236 AM EDT Sun Sep 06 2026 
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Issued: 726 AM EDT Sun Sep 6 2026
Key Messages
1) Isolated minor flooding expected this afternoon for Southern Nassau County with limited impacts.
2) Cooler today with a lingering chance for a few brief rain showers.
3) Drier and warming back up through midweek, before a cold front moves through on Thursday.
Discussion
... .KEY MESSAGE 1... Onshore winds with an E to SE swell this afternoon are expected to contribute to isolated instances of tides touching minor flooding benchmarks. This appears to be limited to along the south shore...