Tidewater is an unincorporated community in Lincoln County, Oregon, United States located on the Alsea River east of Waldport on Oregon Route 34.
Tidewater was named because it is near the head of the tide of the Alsea River. Tidewater post office was established in 1878.
Tidewater is the home of White Wolf Sanctuary, a rescue facility for Arctic wolves.
This region experiences warm (but not hot) and dry summers, with no average monthly temperatures above 71.6 °F. According to the Köppen Climate Classification system, Tidewater has a warm-summer Mediterranean climate, abbreviated "Csb" on climate maps.