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Nantucket County Weather Forecast
| TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT |
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| Chance of T-Storm | Chance of T-Storm | Chance of Showers | Sunny | Mostly Clear | Sunny | Mostly Clear | Mostly Clear | Mostly Sunny | Chance of Showers | Chance of Showers | Mostly Cloudy |
| Lo: 69°FLo: 21°C | Hi: 75°FHi: 24°C | Lo: 69°FLo: 21°C | Hi: 75°FHi: 24°C | Lo: 65°FLo: 18°C | Hi: 75°FHi: 24°C | Hi: 75°FHi: 24°C Lo: 69°FLo: 21°C | Hi: 75°FHi: 24°C Lo: 69°FLo: 21°C | Hi: 75°FHi: 24°C | Hi: 79°FHi: 26°C Lo: 69°FLo: 21°C | Hi: 79°FHi: 26°C Lo: 69°FLo: 21°C | Lo: 69°FLo: 21°C |
| POP: 70% | POP: 50% | POP: 50% | POP: 40% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 704 PM EDT Sat Aug 22 2026 
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Issued: 737 PM EDT Sat Aug 22 2026
Key Messages
- Spotty light showers/drizzle tonight but much of the time it will be dry. More humid Sun with a few showers & t-storms possible especially near & west of the CT River Valley where an isolated strong-severe t-storm or two is possible.
- Drier with a return to seasonable temperatures next week. Rain chances return Thursday/Friday.
Discussion
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KEY MESSAGE 1...Spotty light showers/drizzle tonight but much of the time it will be dry. More humid Sun with a few showers & t-storms possible esp...