Which Massachusetts Beaches Are Closed Tuesday August 18?

Massachusetts has 32 beaches closed or posted against swimming on Tuesday, August 18, 2026, according to MassLive’s roster drawn from state water-quality postings. Twenty-one listings cite bacterial exceedances, seven cite harmful cyanobacteria blooms, and four cite other water-quality concerns.

That is today’s traveler decision. Before anyone enters the water, match the exact beach name on the Massachusetts DPH interactive beach water quality dashboard, because postings change by site and by day.

What MassLive reports for August 18

MassLive published the Tuesday roster early on August 18 and ties the list to high bacteria, harmful cyanobacteria blooms, and other water-quality concerns. The outlet notes that closed beaches can still host dry activities such as walking, sunbathing, or sports that avoid water contact.

Lynn’s Kings Beach segments and Lynn Shore Beach appear among the bacterial listings, which is why a Lynn Shore Reservation frame is a fair identity match for today’s advisory. Worcester’s Coes Pond, Indian Lake, Lake Quinsigamond Regatta Point, and Shore Park also show on the same day’s list.

Salem listings include Children’s Island segments and Juniper Point. Coastal travelers planning a Salem day can keep Deep Arrival’s Salem things to do guide as a dry backup if swimming is off the table.

Use MassLive for the dated town-by-town list, then verify the live status on the DPH dashboard before you drive. Screenshots age out quickly when a town clears a posting mid-day.

How to use the DPH beach dashboard

The state dashboard is the authoritative recheck after any news roster. Search by town and beach name, then confirm whether the site is Open or Closed before packing swim gear.

Bacterial postings usually mean elevated measured bacteria that raise illness risk for people who swallow water. Cyanobacteria bloom postings are a separate hazard class and can remain up even when nearby beaches look clear from the sand.

Do not treat one town’s closed beach as proof that every nearby shoreline is unsafe. The August 18 list is site-specific, and the dashboard is built to keep those distinctions exact.

If your plan is Cape Cod or Greater Boston without a fixed beach, keep a non-swim itinerary ready. Deep Arrival’s Cape Cod things to do guide and Boston things to do guide remain useful when water contact is the only piece that fails.

Named beaches travelers ask about today

Hull’s XYZ Beach is listed under other water-quality concerns on the Tuesday roster. Travelers headed to Hull can still use Deep Arrival’s Nantasket Beach visitor guide for parking and shore logistics, then confirm XYZ and any nearby postings on the dashboard before swimming.

Brewster’s Cliff Pond listings cite harmful cyanobacteria blooms at two access points. Inland pond days need the same dashboard check as ocean beaches, because bloom postings are not limited to the open coast.

Ashland Reservoir Main Beach and Hopkinton Reservoir Main Beach appear under bacterial exceedances. MetroWest day-trippers should not assume a DCR reservoir beach is open just because the parking lot looks busy.

Tisbury’s Tashmoo Beach and Tashmoo Cut are listed for other concerns. Vineyard travelers should verify those exact names rather than generalizing from another Martha’s Vineyard beach that is not on the list.

Health risk and dry-day fallbacks

MassLive points readers to Massachusetts Department of Public Health guidance that swimming in water with high bacteria can cause gastrointestinal and skin illness. The safest move is to skip water contact at any posted beach and choose a dry activity nearby.

The same coverage notes that the public can still visit posted beaches for non-contact uses. Bring that distinction into group chats so one posting does not cancel an entire day trip.

After heavy rain, recheck even beaches that were open at breakfast. Runoff can push new bacterial exceedances onto the dashboard later the same day.

Deep Arrival’s earlier August 2 Massachusetts beach roster remains useful chronology for how these summer advisories look in practice. It does not replace today’s August 18 list or the live DPH dashboard.

What to do before you leave the hotel

Write down the exact beach name, not just the town. Then open the DPH dashboard on a phone with service and confirm Open versus Closed status for that name.

If the beach is posted, keep the dry backup and do not negotiate with cloudy water that “looks fine.” If the beach is open, still avoid swimming after heavy rain and skip water if anyone in the party is already ill.

Parents with young children should treat cyanobacteria bloom postings as a hard no for wading. Bacterial postings are also a hard no for unsupervised water play.

Photograph the dashboard result with a timestamp if you are coordinating a larger group. That reduces arguments at the lot when one person saw an older social post.

Central Massachusetts travelers should not treat a Worcester bloom posting as a reason to cancel every inland lake day either. Confirm Coes Pond, Indian Lake, Lake Quinsigamond Regatta Point, and Shore Park one by one, then keep a park walk or town lunch if swimming is posted.

North Shore drivers heading past Lynn can combine a closed Kings Beach segment with a dry visit to nearby reservations and town stops. The posting blocks water contact, not the entire shoreline corridor.

If your group split plans across two towns, assign one person to refresh the dashboard before departure and again on arrival. That habit prevents one stale morning screenshot from overruling a later clearing or a new exceedance.

Remember that “other” water-quality concerns on the MassLive roster still mean stay out of the water until the DPH page says otherwise. The label is not a softer permission than bacteria or bloom postings.

Tuesday’s list is a same-day swimming filter, not a statewide beach shutdown. Exact names and the live dashboard decide whether the water portion of the trip survives.