Mernill Pond State Reservation, MA Weather Forecast
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Mernill Pond State Reservation Weather Forecast
| REST OF TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | FRIDAY | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY |
| Patchy Fog | Chance of Showers | Patchy Fog | Patchy Fog | Mostly Clear | Partly Cloudy | Partly Cloudy | Chance of Showers | Chance of Showers | Showers | Showers | Chance of Showers |
| Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C Lo: 60°FLo: 16°C | Hi: 81°FHi: 27°C Lo: 60°FLo: 16°C | Hi: 79°FHi: 26°C | Lo: 61°FLo: 16°C | Hi: 79°FHi: 26°C | Lo: 61°FLo: 16°C | Hi: 79°FHi: 26°C |
| POP: 20% | POP: 40% | POP: 50% | POP: 60% | POP: 60% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 102 AM EDT Tue Aug 18 2026 

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Mernill Pond State Reservation Forecast Discussion
Issued: 151 AM EDT Tue Aug 18 2026
Key Messages
- Fair and less humid Tuesday with gradual clearing. A high risk of rip currents develops across east-facing beaches by Tuesday afternoon.
- No washouts expected, though several opportunities for showers return from mid to late week.
Discussion
... KEY MESSAGE 1...Fair and less humid Tuesday with gradual clearing. A high risk of rip currents develops across east-facing beaches by Tuesday afternoon.
Gradual clearing develops from W to E Tuesday as low pressure s...
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