I would not consider Shipwreck beach to be swimmable. There's a reason it got that name, and a reason they have such a huge pool at the Hyatt that fronts it. Poipu Beach Park is very swimmable and has great snorkeling, but you would need to drive (3 minutes, but a long walk over the hill with all your beach gear) from EVR. Lawaii Beach Resort is directly across the street from a pretty beach, but I have no been in the water there, maybe someone else knows.
Napili One is within 100 yards of Napili Beach (so is Gardens of West Maui?) which is very swimmable and has great snorkeling. Neither of these resorts have ocean views, but are as close as you can get without a view. There are a couple of t/s resorts in Kahana area on Maui--Ocean Front, with a beach, but not the kind of protected cove that makes for great snorkeling. Never stayed in Kihei, maybe others can comment.