Off the southern coast of Sri Lanka, particularly in the waters around Mirissa and Trincomalee, is one of the best places to spot blue whales.

The waters off the coast of California, particularly around the Channel Islands and Monterey Bay, are frequented by blue whales.

In the North Atlantic Ocean, particularly around the coast of Iceland, blue whales can often be spotted during the summer months.

The waters of northern Norway, especially around the Lofoten Islands and Andenes, are known for their rich marine life, including blue whales.

The Azores archipelago in the North Atlantic Ocean is a hotspot for whale watching, including sightings of blue whales.

The waters of the Sea of Cortez, also known as the Gulf of California, are home to a diverse array of marine life, including blue whales.

Along the coast of Western Australia, particularly in places like Albany, Perth, and Exmouth, blue whales can be spotted during their migration season.