Best Things to Do on a Whale Watching in Mirissa Whale watching in Mirissa guide — Sri Lanka's top spot to see blue whales and sperm whales, with boat trip timing, season and what to expect on board.
The waters off Mirissa are one of the most reliable places in the world to see blue whales, the largest animal ever known to have existed.
Sperm whales, spinner dolphins and occasionally other cetacean species are also regularly spotted on the same trips.
Calmer seas and higher sighting rates make this window the most reliable time to book a trip.
Boats depart from Mirissa harbour — round out the day with beach yoga or a stop in Weligama.
Early-morning boats head 10-20km offshore into deep water off the continental shelf, where sightings of blue and sperm whales are common in season.
