The 2nd day to West Maui will be spent at Kaanapali (Black Rock), Nakalele Blowhole, Honokohau bay, and Lahaina . Maui's west shores have the most hotels and resorts and with it the most tourists. If you are staying in Kihei (South Maui) plan on leaving early to insure a parking spot at Kaanapali, as there are only a few public parking spots. you can use paid parking in the shopping center ( they will validate with a purchase)
Kaanapali Beach (Black Rock)
Get up early for your trip to Kaanapali Bay . The public parking lot will be full by 10:00am. This is Maui's most popular beach with a long white, sandy shoreline and loads of activities. The most popular area is Black Rock (located at the northern end of the beach). Black Rock has excellent snorkeling for all ages with easy entry and fish close to shore. More Info...
Option: Kahekili Beach
If you plan on sleeping in, you can still find a great beach just north of Ka'anapali Beach. Kahekili Beach, also known as Old Airport Beach, is a great beach with a nice reef running the length of the beach just 10 feet from shore. There is plenty of parking, tables, bbqs, and more. Snorkeling is as good or better than Black Rock
The next stop will be Nakalele Point (blow hole) located north past Honolua Bay. Look for the dirt parking lot on the left side of the road. The hike does have some steep areas along the cliffs and rugged shoreline. The blow Hole is one of 3 natural blow holes in the world. Do not go anywhere near the blow hole, as people have been sucked up and spit out to sea (killed). More Info...
Option: No Hiking
If you prefer you can drive further up the coast to a lookout for the blow hole. While not as close you will get a good view of the area and see the blowhole in the distance.
Honokohau Bay is a rocky Beach just between Nakalele Point and Honolua Bay. This rocky beach is a favorite in the winter months when the surf is up. Nice place for a picnic lunch. There is a great juice stand worth stopping for. More Info...
Alternate: Olowalu Beach
If you didn't get a chance to stop at Olowalu last time, make sure you do. This is the best spot for live coral.