Lake Merwin is a lake in Clark County, Washington. Its current pool elevation is about 235 ft (USGS gauge 14219950, 2026-08-11 17:00). We never estimate missing readings — a “—” means no current source.
Full conditions, things to do, and where to stay, eat, and rent on the Lake Merwin guide. More: boat rentals · cabins & rentals · fishing · things to do.