The official season of whale shark watching starts from February and runs until end of May, where the sea of Donsol, Philippines is at its clearest and calmest.

December to April is the best time to visit Maldives.

Shark mating season is February to April and Manta Rays are expected December through February in Palau, Micronesia.

Best weather conditions existing from November to April in Similan Island, Thailand.