Mirissa in the South and Trincomalee in the East of Sri Lanka are the world’s top two locations for watching the largest ever creature to have inhabited our planet, the Blue Whale. The number of Blues peak in December and again in April during their annual migration as they travel between feeding areas in the Bay of Bengal and up welling off Somalia in Africa. There is also a sufficient resident population of Blue Whales to provide an extended viewing season up to about August. Between November and April (until the South-west monsoon arrives), Blue Whales can be observed off Mirissa with a strike rate of over 90%. The North-east monsoon begins to ease from around February and Blue Whales can be seen off Trincomalee till late August.