Maui is a leading whale-watching center in the Hawaiian Islands due to Humpback whales wintering in the sheltered au Channel between the islands of Maui county.
The whales migrate approximately 3,500 miles (5,600 km) from Alaskan waters each autumn and spend the winter months mating and birthing in the warm waters off Maui, with most leaving by the end of April.
Located in the prevailing, northeast trade winds, these areas have heavier rainfall levels, which increase considerably at higher elevations.
Upcountry Maui (Makawao, Pukalani, and Kula) at the 1,700- to 4,500-foot levels, provides mild heat (70s and low 80s) during the day and cool evenings.
Here, more rainfall will be found throughout the year, and higher humidity levels.
Leeward side includes South Maui (Kihei, Wailea and Makena) and West Maui (Lahaina, Kaanapali and Kapalua).
"Big Bog," a spot on the edge of Haleakala National Park overlooking Hana at about 5,400 feet elevation had an estimated mean annual rainfall of 404.4 inches over the 30-year period of 1978 to 2007.
Even the heaviest rain showers are seldom accompanied by thunder and lightning.
Kahului is literally the center of the island, and tends to keep steady, high temperatures throughout the year, the micro-climate in Kahului can be at times muggy, but it usually feels relatively dry and is often very breezy.
The Wailuku area is set closer to the West Maui Mountain range.
The whales are typically sighted in pods: small groups of several adults, or groups of a mother, her calf, and a few suitors.
Humpbacks are an endangered species protected by U. federal and Hawai although Maui's Humpback face many dangers, due to pollution, high-speed commercial vessels, and military sonar testing, their numbers have increased rapidly in recent years, estimated at 7% growth per year.