Sri Lanka sits above a deep-water canyon that makes it one of the most reliable places on earth to see blue whales, alongside sperm whales and large pods of spinner dolphins. Pre-dawn boat departures head out from Mirissa or Trincomalee depending on the season, with strict distance protocols followed around every sighting. Sightings are never guaranteed, but the odds here are genuinely amongst the best in the world. A calm sea and an experienced, licensed operator make all the difference to the experience.