Fort Canby, United States offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Fort Canby, Washington, United States, is known for Cape Disappointment State Park and the Lewis and Clark Interpretive Center. The best time to visit Fort Canby, United States, is during the summer months of June to August, when the average air temperature is around 65-70°F and the water temperature is approximately 55-60°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!