13 MI Beaches That Are Closed Or Have Contamination Advisories As you plan for the weekend, make sure your favorite beach isn't closed. Summertime in Michigan is the best. Whether you plan to hit the water on a boat or at the beach, we all enjoy some sun and relaxation. The only downside is when your favorite beach is closed or has a contamination advisory. As you make your plans for the weekend, look ahead and make sure that the beach you want to go to is open. If it is not, you may want to check out one of the other 1,233 public beaches in Michigan.