There are many beaches located on the Atlantic Ocean. The best beach would depend on who the question is being asked to. For example, I am born and raised in Virginia, so my favorite beach would be Virginia Beach. It has always been a twenty-minute drive for me and is nostalgic for my childhood.
Other great beaches that are on the Atlantic Ocean are Block Island, which is in Rhode Island. It can only be accessed from a ferry and has beautiful sands and rocks to view. Here is also Martha's Vineyard, which has cliffs and a beautiful setting.
Florida‘s Miami South Beach is a massive, well tended strip just off the funkiest part of Miami, so it’s loaded with flash folk, facilities and access to nice bars and restaurants. Souas a much more beach-suitable climate than the East Coast’s more northerly Atlantic Ocean beaches such as Atlantic City, though that large stretch of sand backed by the famous Boardwalk works well in mid-summer.
The weather is generally good, apart from the periodically storm coming up diring aummer, but the sea is chilly, particularly December-March. The weather is however usually at its best around November-May.