The centerpiece of the resort is its 87,000-square-foot aquatic playground with five interconnected pools, spa tubs, swim-through grottos, waterfalls, meandering streams, and a 128-foot water slide. Scuba-diving lessons and other aquatic classes are offered daily (surcharge). Guests can also enjoy aquatic golf, water slide races, water volleyball, and water aerobics.
The 24-hour ocean-view fitness center has free weights, strength-training equipment, and cardiovascular machines with individual TVs.
The 15,000-square-foot Heavenly Spa by Westin (surcharge) offers 16 treatment rooms, an outdoor yoga garden and massage cabana, an ocean-view relaxation lounge, and men's and women's locker rooms with saunas, steam rooms, and spa tubs. Extensive spa services include Hawaiian massages, and full-body treatments and facials. The full-service beauty salon offers manicures, pedicures, and hair-styling services, along with bridal beauty arrangements.
Westin Kids Club for children ages 5-12 (surcharge) and Westin Destination Club specializes in Hawaiian cultural activities.
At the adjacent Kaanapali Beach, rentals are available for water activities such as snorkeling, catamaran sailing, parasailing, and kayaking. Guests can also rent lounge chairs and cabanas. Whale watching (seasonal), sunset cruises, and snorkeling excursions are offered.
The resort is within a half-mile of Kaanapali's two 18-hole golf courses, the Royal Kaanapali Course, designed by Robert Trent Jones, Sr. and the Kaanapali Kai Course. A golf academy is seven miles away.
Sight-seeing and whale-watching cruises, deep-sea fishing excursions, and water-sports rentals are available at Lahaina Harbor, four miles away.
The recreational activities listed below are available either on site or near the hotel; fees may apply.
A social experience, Unwind...A Westing Evening Ritual is offered poolside overlooking the ocean and features tastes, sights, and sounds of Hawaii.