Popham Beach State Park in Phippsburg, Maine is a great destination for a summer swimming and beach day. There is a large parking are and two changing facilities. The beach is long, wide and sandy. The beach itself has strong surf and occasional riptides and strong currents. Care must be taken especially if you have children with you. Properly supervised the surf can be fun. There are lifeguards in place during the summer months.
Be prepared depending on the tide to walk a great distance to get to the water. The beach is great for sunbathing and playing in the sand but not so good for mixing in trips to the water.
An interesting side trip a few miles down the road is the Fort Popham State Historic Site.