Olowalu Beach is a fairly long stretch of informal beach parks located along the highway to Lahaina. There aren't many facilities here, and based on my one attempt to dive the site, I'd recommend snorkeling and not scuba. It's very shallow for a very long ways out! Maybe there's a secret deeper channel...if you find it, you're luckier than I! I have a friend who was working on a snorkel boat...as they were watching a green sea turtle surface for air, CHOMP! A tiger shark took the turtle out....and the tourists went elsewhere to snorkel! IMHO, it's not worth an attempt to dive (at least from shore).