Coordinates: 36°53′25″S 174°27′05″E / 36.89028°S 174.45139°E
Te Henga (Bethells Beach) is a coastal community in the Auckland Region in the north of the North Island, New Zealand. The Māori name Te Henga, meaning sand, originally applied to a wide area of the lower Waitakere River valley, but in 1976 the New Zealand Geographic Board changed the name of the beach from Bethells Beach to Te Henga (Bethells Beach).
The beach is approximately 30 kilometres west of Auckland City, at the mouth of the Waitakere River where it flows into the Tasman Sea. One of several popular resorts in the area (others include Muriwai, Piha and Karekare), it experiences a population explosion in summer when Aucklanders head to the sea.
The Te Henga Valley shows evidence of human settlement dating back over 1000 years. The cultural history of the area is of archaeologically significant sites, including food gathering areas, pā, walkways, canoe landings and sacred places.
The arrival of Europeans in the 19th century led to major changes in the character and shape of Bethells Beach. The most significant of these changes was the clearing of the land for timber and pastoral farming which began in 1854 and continued until the 1920s. In addition, a dam was constructed on the Waitakere River in the 1920s, drastically altering the level of the riverbed and reducing the outflow of water to the sea.