From December into May whale-watching becomes one of the most popular activities on Maui. During the season all outfitters offer whale-watching in addition to their regular activities, and most do an excellent job. Boats leave the wharves at Lahaina and Maalaea in search of humpbacks, allowing you to enjoy the awe-inspiring size of these creatures in closer proximity. From November through May, the Pacific Whale Foundation sponsors the Maui Whale Festival, a variety of whale-related events for locals and visitors; check the calendar at www.mauiwhalefestival.org.

As it's almost impossible not to see whales in winter on Maui, you'll want to prioritize: is adventure or comfort your aim? If close encounters with the giants of the deep are your desire, pick a smaller boat that promises sightings. Those who think "green" usually prefer the smaller, quieter vessels that produce the least amount of negative impact to the whales' natural environment. For those wanting to sip mai tais as whales cruise by, stick with a sunset cruise ($40 and up) on a boat with an open bar and pupu (Hawaiian tapas). Afternoon trips are generally rougher because the wind picks up, but some say this is when the most surface action occurs.

Every captain aims to please during whale season, getting as close as legally possible (100 yards). Crew members know when a whale is about to dive (after several waves of its heart-shape tail) but can rarely predict breaches (when the whale hurls itself up and almost entirely out of the water). Prime viewing space (on the upper and lower decks, around the railings) is limited, so boats can feel crowded even when half full. If you don't want to squeeze in beside strangers, opt for a smaller boat with fewer bookings. Don't forget to bring sunscreen, sunglasses, a light long-sleeve cover-up, and a hat you can secure. Winter weather is less predictable and at times can be extreme, especially as the wind picks up. Arrive early to find parking.

Boats and Charters

Gemini Sailing Charters. Morning and afternoon whale-watching trips off the Kaanapali coast are available on this well-maintained catamaran staffed by an experienced and fun crew. The cost is $69 per person for the morning trip and $80 for the afternoon trip. You can find Gemini on Kaanapali Beach near the Westin Maui resort's activity desk. Westin Maui Resort & Spa, 2365 Kaanapali Pkwy., Lahaina, Hawaii, 96761. 800/820–7245; 808/669–0508; www.geminisailing.com.

Maui Adventure Cruises. Whale-watching from this company's raft puts you right above the water surface and on the same level as the whales. You'll forgo the cocktail in your hand but you won't have to deal with crowds, even if the vessel is at max capacity with 36 people. The whales can get up close if they like, and when they do it's absolutely spectacular. These rafts can move with greater speed than a catamaran, so you don't spend much time motoring between whales or pods. Refreshments are included. Prices are $49 for adults and $39 for kids 5–12 years old (children younger than 5 are not admitted). Lahaina Harbor, Slip 11, Lahaina, Hawaii, 96761. 808/661–5550; www.mauiadventurecruises.com.

Pacific Whale Foundation. With a fleet of 10 boats, this nonprofit organization pioneered whale-watching back in 1979. The crew (including a certified marine biologist) offers insights into whale behavior and suggests ways for you to help save marine life worldwide. One of the best things about these trips is the underwater hydrophone that allows you to listen to the whales sing. Trips meet at the organization's store, which sells whale-theme and local souvenirs. You'll share the boat with about 100 people in stadium-style seating. If you prefer a smaller crowd, book their eco-friendly raft cruises instead. Maui Harbor Shops, 300 Maalaea Rd., Suite 211, Maalaea, Hawaii. 808/427--2460; www.pacificwhale.org.