Plankton blooms draw wild whale sharks into Donsol Bay each winter, making this Bicol community one of the world's most respected non-feeding encounter sites. Every boat carries a trained Butanding Interaction Officer, snorkel-only rules are enforced, and WWF-backed conservation has documented hundreds of returning individuals since 1998. February through April brings the calmest seas and the highest natural sighting rates.
Plankton blooms draw wild whale sharks into Donsol Bay each winter, making this Bicol community one of the world's most respected non-feeding encounter sites. Every boat carries a trained Butanding Interaction Officer, snorkel-only rules are enforced, and WWF-backed conservation has documented hundreds of returning individuals since 1998. February through April brings the calmest seas and the highest natural sighting rates.
Up to 92% sighting chance in Donsol Bay (Sorsogon). Best months: February, March, April.
For ethical travelers, yes. Donsol relies on wild plankton-feeding sharks with no provisioning, while Oslob uses artificial feeding that major conservation groups discourage. Peer divers consistently rank Donsol among the most responsible encounter models in Southeast Asia.
No. Philippine regulations restrict the interaction zone to snorkeling only. Scuba diving is available at separate Ticao Island reef sites, but those dives are unrelated to the butanding program in Donsol Bay.
Every licensed vessel carries a trained BIO who briefs guests, enforces approach distances, limits time in the water, and logs sightings for the local management council. Their presence is mandatory, not optional.
Boat interaction fees typically run PHP 3,500 to 4,500 per vessel plus a PHP 300 conservation fee per foreign visitor (2026 prices). Shared boats split costs among up to six guests; private charters cost more.
The official window runs November to May, with the calmest seas and highest natural sighting rates from February to April. Morning sessions often see glassy conditions before afternoon wind picks up across Sorsogon Gulf.
