Seaside is a city in Clatsop County, Oregon, United States, on the coast of the Pacific Ocean. The name Seaside is derived from Seaside House, a historic summer resort built in the 1870s by railroad magnate Ben Holladay. The city's population was 6,457 at the 2010 census.
The Clatsop were a historic Native American tribe that had a village named Ne-co-tat (in their Chinook language) in this area. Indigenous peoples had long inhabited the coastal area.
August is the hottest month ☀️, with average temperature of 58° degrees. January is the coldest month ❄️, with average temperature of 45° degrees. December is the wettest month 💧, with 20.39 In. of rain and/or snow.