Tamalpais Homestead Valley, United States offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Tamalpais Homestead Valley, California, United States, is known for its proximity to Mount Tamalpais State Park and the scenic hiking trails in the area. The best time to travel to Tamalpais Homestead Valley is from June to September, with average air temperatures around 60-70°F and water temperatures in nearby coastal areas around 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!