Lāhainā is the largest census-designated place in West Maui, Maui County, Hawaii, United States, and includes the Ka'anapali and Kapalua beach resorts. As of the 2010 census, the CDP had a resident population of 11,704. Lahaina encompasses the coast along Hawaii Route 30 from a tunnel at the south end, through Olowalu, and to the CDP of Napili-Honokowai to the north. During the tourist season, the population can swell to nearly 40,000 people.There are many different climates in the different districts of Lahaina. The historic district is the driest and calmest and hosts the small boat harbor. Kaanapali is north of a wind line and has double the annual rainfall and frequent breezes. The Kapalua and Napili areas have almost four times the annual rainfall compared to the historic district of Lahaina. The historic district has preserved 60 historic sites within a small area and they are managed by the Lahaina Restoration.