Beach volleyball, or sand volleyball, is an Olympic team sport played by two teams of two players on a sand court divided by a net.

As in indoor volleyball, the object of the game is to send the ball over the net in order to ground it on the opponent's court, and to prevent the same effort by the opponent. A team is allowed up to three touches to return the ball. The ball is put in play with a service—a hit by the server from behind the rear court boundary over the net to the opponents. The rally continues until the ball is grounded on the playing court, goes "out", or is not returned properly.

The team winning a rally scores a point (Rally Point System), and serves to start the following rally. The four players serve in the same sequence throughout the match, changing server each time a rally is won by the receiving team.

Originating in the US states of California (Southern California) and Hawaii, beach volleyball has achieved worldwide popularity.

In 1920, new jetties in Santa Monica, California created a large sandy area for public enjoyment, planting the seed for beach volleyball development in that region. The first permanent nets began to appear, and people soon began playing recreational games on public parts of the beach and in private beach clubs. Eleven such beach clubs appeared in the Santa Monica area, beginning in late 1922. The first inter-club competitions were staged in 1924.