Where and when to see blue whales
The largest animal that has ever lived, seen from boats on whale-watching trips where deep water comes close to shore, as off Sri Lanka.
This guide documents sightings in 1 Good Dives region. The most regions are in peak season in April–July.
Blue whales sighting calendar
Calendar months, every year
Peak = best odds · ● = regularly seen · blank = unlikely.
Calendars describe animal presence, not weather or site access; check each region’s dive season. For grouped animals, a marked month may apply to only one member of the group. Sightings vary by site and dive.