Sri Lanka’s waters host some of the largest animals on Earth, with blue whale and sperm whale sightings possible off both the south and east coasts. Boats depart early morning from Mirissa, from November to April, or Trincomalee, from May to September, when seas are calmest and sightings most reliable. Dolphin pods, sometimes numbering in the hundreds, are a regular and thrilling accompaniment. We work only with operators who keep a respectful distance from the animals, prioritising responsible viewing over guaranteed close encounters.