- Samish Bay is a bay of the Salish Sea in Skagit County, Washington, United States. It is adjacent to Bellingham Bay and Chuckanut Bay in the north. To the northeast the bay is bordered by Larrabee State Park and the Chuckanut Mountains. To the south the bay is bordered by Samish Island, which despite its name is not an island, but actually a man-made peninsula, separating the bay from nearby Padilla Bay.