Wallis Sands State Beach is a public recreation area located on the Atlantic Ocean in the town of Rye, New Hampshire.

The state park offers a sandy beach with bathhouse, picnicking, and 500-car pay-parking lot.

Following expansion of its footprint to 18 acres (7.3 ha) and the construction of jetties to protect an enlarged beach area, Wallis Sands State Park was opened to the public in June 1964.

[3] In July 2010, nearly 150 beachgoers and swimmers were stung here on the same day by a lion's mane jellyfish.

A lifeguard had pitchforked a 40-pound (18 kg) jellyfish – whose longest tentacle was 13 feet (4.0 m) – to try to drag it ashore and dispose of it; however, the dead jellyfish broke apart, releasing its nematocysts on the beach and stinging the crowd in the span of about 20 minutes.