| +/- natural=beach
Area of shore which is fairly open, slopes smoothly to the water, and is free of trees
The natural=beach tag is used to mark a loose geological landform along the coast or along another body of water consisting of sand, gravel, shingle, pebbles, cobblestones or sometimes shell fragments etc.
For seaside resorts use leisure=beach_resort for the boundary of the resort, which may include accommodation and other facilities and which may include one or more actual beaches. For areas of sand that are not beaches, use natural=sand or surface=sand (+ area=yes or a more specific tag describing the area).
How to map
Coastal beaches should be mapped to high water (natural=coastline) or to the edge of a lake or similar. Use name=* to give the name of the beach, surface=* to define the surface formation (sand, gravel, pebbles) and supervised=* to indicate if the beach has a lifeguard (yes, no, interval)
The "default" rendering on osm.org is a yellow shaded area, regardless of surface. Other renderings take surface=* tagging into account.
Related terms: <coast> <beach>