Beaches in the town of Guardamar del Segura, in southeastern Spain, closed earlier this week after the discovery of two venomous sea slugs in the water, local authorities announced.

More beaches are closed on Friday than they were on Thursday, according to the Massachusetts Department of Public Health.

Some beachgoers choose to go clothing-optional. Here are the best nudist beaches in the U.S., according to a new study.

Hurricane Erin will be hundreds of miles from the Massachusetts coast, but it could still cause problems at beaches.

Hurricane Erin lashed Nantucket with strong winds and rough surf Friday as the storm moved northeast. Massive waves crashed along Cisco Beach on the island's south shore early Friday. All south shore beaches on Nantucket are closed due to the large surf and dangerous rip currents.

If your local beach is not already closed due to Hurricane Erin, you'll want to avoid the beaches closed due to unsafe swimming water. The Massachusetts Department of Public Health (MDPH) states that swimming in the water at these closed beaches poses a threat of illness due to high levels of bacteria.

The National Weather Service is strongly urging beachgoers to stay out of the water in coming days in New Jersey and Delaware as Hurricane Erin churns up dangerous rip currents off coast.

The ocean is taking more than it gives on Martha's Vineyard. Each storm is cutting deeper into South Beach in Edgartown, and the pace is accelerating.