If you need help planning the perfect beach vacation this summer, Dr. Beach has the spot for you.

Stephen Leathermen, aka Dr. Beach, has rounded up his favorite U.S. beaches for 2015—with some tried and true sandy locales and a few soon-to-be favorite family finds.

Leatherman, professor and director of the Laboratory for Coastal Research at Florida International University, is considered a world authority on coastal storm impacts, beach erosion and has been ranking the nation's beaches since 1991.

The doctor uses 50 criteria to select his spots, including water quality, safety, available activities and environmental factors.

Many of 2014’s top picks made the new list but we were excited to see a great California beach crack the roundup. A whopping four out of ten beaches are in Florida, so if you’re looking for a sure-bet, head to the sunny keys. Leatherman also recommends a few things to do at many of these special sites.

Pack up your towels and chairs—and don’t skimp on the sunscreen. Check out country's best beaches below.