December — the first arrivals
Mothers and the first singing males arrive. Fewer boats on the water; sightings are good but less dense.
Local Bay Tours
December to March, when 1,500+ humpbacks come home to calve.
Banderas Bay is a humpback nursery. Every winter, whales that spent the summer feeding off Alaska travel more than 6,000 km to give birth in this warm, deep, sheltered bay — one of the highest-density calving grounds in the eastern Pacific. Between December and March, sightings on our tours run above 95 %.
Season
Mothers and the first singing males arrive. Fewer boats on the water; sightings are good but less dense.
Newborn calves appear. The bay is at its fullest and surface activity is constant.
Peak density, active calves learning to breach, and competitive male groups. If you can choose, choose February.
Calves are strong and playful, adults begin heading north. Excellent behaviour, slightly fewer animals.
NOM-131-SEMARNAT
Mexican federal law (NOM-131-SEMARNAT) governs whale watching in Banderas Bay. Every boat we work with carries a SEMARNAT permit and a certified guide.
Male humpbacks sing here and our research-partner boats carry hydrophones. Hearing an eight-minute song through the hull is, for most guests, the moment of the trip.
Local Bay Tours
Certified marine biologists, onboard hydrophone, 95 %+ sighting rate December–March.
From $89 / per person
Book nowAugust to November. Release hatchlings with a state-licensed conservation camp.
From $55 / per person
Book nowA protected national park — and the most misunderstood tour in Vallarta.