Maui Humpback Whale Season
Thousands migrate 3,000 miles from Alaska to breed in Maui Nui.
By Maui Nō Ka ʻOi Staff
Each winter, humpback whales return to the waters off Maui.
Blows appear on the horizon, followed by tail lifts, breaches and other surface activity as humpback whales move through the channel.
For scientists, educators and naturalists at Pacific Whale Foundation, these first signs mark the beginning of Maui’s whale season – an annual migration that defines winter in Hawaiʻi and begins months of research, education and time on the water.
Maui’s Winter Whale Migration
Humpback whale season in Maui typically runs from December through April, with peak activity between January and March. During those months, thousands of North Pacific humpback whales arrive in Hawaiʻi after traveling more than 3,000 miles from their summer feeding grounds in Alaska.
This migration is one of the longest undertaken by any mammal on Earth. After months of feeding in cold northern waters, humpbacks journey south to the warm, relatively shallow seas surrounding the Hawaiian Islands.
The migration is driven by reproduction.
During summer in Alaska, humpback whales feed heavily on krill and small schooling fish, building thick reserves of blubber. By the time they reach Hawaiʻi, most adults have stopped feeding almost entirely. The warm waters of Maui Nui are not rich feeding grounds; instead, they are nurseries and social arenas.
Here, whales mate, give birth and care for calves.
A newborn humpback whale measures 10 to 15 feet long and can weigh close to 2,000 pounds. In its first weeks of life, the calf stays close to its mother, nursing on milk so rich it fuels rapid growth. By the time the pair begins the long migration north in spring, many calves have doubled in size.
The waters between Maui, Lānaʻi and Molokaʻi – known collectively as Maui Nui – form one of the most important humpback whale habitats in the North Pacific.
These channels are relatively shallow, warm and protected compared with the open ocean and Northern feeding grounds. That combination creates ideal conditions for calving and social interaction. Each winter, Maui Nui becomes a gathering place where males compete for mates, mothers nurse calves and whales establish the social dynamics that shape the next generation.
In Hawaiian, humpback whales are known as koholā. Their return each winter is part of a rhythm the islands have long known – a seasonal arrival that signals renewal in the channels of Maui Nui.
Since its founding in 1980, Pacific Whale Foundation researchers have studied whales in these waters, building one of the longest-running humpback whale research efforts in Hawaiʻi.
As Chief Scientist Jens Currie explains, “We’re focused on working with management to understand the data they need to make actual management and enforcement decisions.” Long-term monitoring of humpback whales in Maui Nui creates that link between observation and protection.
Research That Tracks a 3,000-Mile Journey
Ocean Spirit is a high-tech, eco-friendly sailing catamaran with a maximum capacity of 55 passengers. The Whale Watch Sail Deluxe tour is led by certified marine naturalists who interpret humpback whale behavior and ecology.
One of the most powerful tools in humpback whale research is photography.
The underside of every humpback whale’s tail fluke carries a pattern of black-and-white markings, along with a distinct trailing edge pattern, that is unique to that individual – much like a fingerprint. By photographing those markings as whales dive, researchers can identify specific individuals and recognize them again when they return in future seasons.
Over decades, these photo-identification catalogs have revealed migration routes spanning thousands of miles and multiple generations. Some whales documented off Maui have been matched with sightings in Alaska, demonstrating the biological connection between feeding grounds in the north and winter habitat in Hawaiʻi.
Long-term data also allows us to track the number and trends of the population, while monitoring how consistently humpback whales return to Maui Nui. Many individuals demonstrate strong site fidelity, appearing in Hawaiian waters year after year. That consistency underscores the ecological importance of protecting this habitat.
Whale Watching as Research in Action
Winter in Maui offers one of the rare opportunities in the world to watch humpback whales in their breeding grounds.
On calm mornings, the ocean in Maui Nui often fills with activity. A distant breach sends spray into the air. A tail lifts before a deep dive. Sometimes a mother and calf move slowly along the surface together, the calf learning to breathe, dive and navigate.
An adult humpback whale can grow 45 to 50 feet long and weigh nearly 40 tons. When a whale breaches, its entire body launches out of the ocean before crashing back into the water with a force that can echo across the channel.
Researchers believe breaching may serve several purposes, including communication, mating displays and possibly the removal of parasites. Beneath the surface, male humpbacks produce complex songs that can last for hours and travel miles through the water – vocal displays that continue to intrigue scientists.
While whales can sometimes be spotted from shore, the most immersive way to experience Maui’s whale season is from the water itself. A fleet of PacWhale Eco-Adventure whale watch vessels departs from Maʻalaea Harbor and Lahaina Harbor throughout the season, bringing guests directly into the channels of Maui Nui.
Informed by active marine research and decades of field study in Maui Nui, PacWhale Eco-Adventure’s whale watch vessels travel into the channels where the migration unfolds, but the excursions are more than sightseeing trips. Onboard naturalists share current research findings, explain whale behaviors in real time and connect what guests are witnessing to ongoing scientific study in Maui Nui.
Revenue from these eco-adventures directly supports the organization’s research, education and conservation programs. Revenue from these excursions helps fund long-term monitoring of humpback whales in Maui waters.
Today, Pacific Whale Foundation remains an active presence in Maui’s whale season through research, education and public excursions. Each excursion contributes to the same long-term monitoring efforts that help Pacific Whale Foundation scientists understand migration trends, habitat use and population health.
For many visitors, the experience is both educational and memorable. Seeing a 40-ton whale rise from the ocean can change how they think about the Pacific.
The annual return of humpback whales to Maui is both a seasonal event and an ecological marker. It reflects a Pacific migration linking Alaska’s feeding grounds to Hawaiʻi’s winter habitat.
Each winter, the giants return – completing a circle of life that connects ocean, people and place.
Reserve a whale watch with PacWhale Eco-Adventures and support long-term research at Pacific Whale Foundation: pacwhale.com
FAQ
When is whale season in Maui?
Humpback whale season in Maui typically runs from December through April, with peak activity between January and March.
Why do humpback whales migrate to Hawaiʻi?
They migrate from Alaska to Hawaiʻi to mate, give birth and nurse their calves in warm, shallow waters.
What makes Maui Nui important to humpback whales?
The shallow, protected channels between Maui, Lānaʻi and Molokaʻi provide ideal breeding and calving habitat. Pacific Whale Foundation researchers have documented the region’s importance through decades of monitoring in this North Pacific wintering ground.
How far do humpback whales travel?
North Pacific humpback whales migrate more than 3,000 miles between Alaska and Hawaiʻi each year.
What behaviors might you see on a whale watch?
Common behaviors include breaching, tail slapping, fin waving, spy-hopping and mother–calf interactions, all interpreted by Pacific Whale Foundation naturalists during seasonal whale watches.
Pacific Whale Foundation
pacwhale.com | pacificwhale.org
Reservations: 808-249-8811