Nearly 50 beaches are closed across Massachusetts on Sunday, Aug. 31.

There are 49 beaches closed, most due to excessive bacteria levels, according to the state Department of Public Health.

One of those is the main beach at Walden Pond State Reservation, which will remain closed for the entirety of summer 2025 as a new, state-of-the-art $6.1 million bathhouse is constructed. Red Cross Beach at Walden Pond will remain open, but without lifeguards.

Here is the full list of beach closures and reasons for closing on Sunday:

Ashby: Damon Pond Beach — excess bacteria

Ashland: Ashland Reservoir — Main Beach-excess bacteria

Beverly: Woodbury — excess bacteria

Billerica: Nutting Lake, Micozzi Beach at North and South — excess bacteria

Braintree: Smith Beach — excess bacteria

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