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Montauk, NY Weather Forecast
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Montauk Weather Forecast
| THIS AFTERNOON | TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT |
 |  | |  |  |  | |  |  |  | | |
| Chance of Showers | Chance of T-Storm | Chance of Showers | Chance of Showers | Chance of T-Storm | Showers | Chance of Showers | Partly Cloudy | Sunny | Mostly Clear | Sunny | Mostly Clear |
| Hi: 81°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 75°FHi: 24°C | Lo: 65°FLo: 18°C | Hi: 75°FHi: 24°C | Lo: 69°FLo: 21°C | Hi: 79°FHi: 26°C | Lo: 69°FLo: 21°C | Hi: 79°FHi: 26°C | Lo: 65°FLo: 18°C | Hi: 75°FHi: 24°C | Lo: 65°FLo: 18°C |
| POP: 20% | POP: 90% | POP: 50% | POP: 50% | POP: 70% | POP: 70% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 224 PM EDT Thu Aug 20 2026 
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Montauk Forecast Discussion
Issued: 832 PM EDT Thu Aug 20 2026
Key Messages
1) Showers and a few thunderstorms will bring heavy rainfall and increasing potential for flash flooding late this afternoon into a portion of tonight.
2) Unsettled conditions may continue across eastern half of the area on Friday.
3) Additional showers are expected Saturday into Sunday, but impacts appear limited at this time.
4) Dry and seasonably warm early next week.
Discussion
... .KEY MESSAGE 1... Confidence is increasing that flash flooding will occur ...