Summary. Located on the shores of Lake Washington, Hyatt Regency Lake Washington at Seattle’s Southport, a recent AAA Four Diamond and Best of Housekeeping award winner, perfectly combines the natural beauty of the Pacific Northwest with modern amenities. Enjoy close proximity access to Sea-Tac International Airport, downtown Seattle and Bellevue, Mount Rainier National Park, Gene Coulon Memorial Beach Park, and more. Explore the beauty of the Pa...