Diving with Humpback Whales

Humpback whale seasons follow their migration between polar feeding grounds and tropical breeding waters. Tonga: July to October. Dominican Republic (Silver Bank): January to March. Hawaii: December to April. Reunion Island: June to October. Norway (feeding, not breeding): May to September. Colombia: July to November. Each destination offers different encounter types - breeding behaviour in the tropics versus feeding behaviour in polar waters.

In-water humpback encounters are almost always done while snorkelling or freediving, not scuba diving. The bubbles and noise from scuba gear can disturb whales, and most regulations prohibit scuba approaches. The technique is to slip quietly into the water from a boat that has positioned itself at a respectful distance, then float at the surface and let the whales decide whether to approach. Tonga is the gold standard for in-water humpback encounters, with licensed operators running dedicated whale swim trips. Silver Bank in the Dominican Republic and Reunion Island are other top destinations. You need to be a confident swimmer but no diving certification is required.

Snorkel gear is all you need: a high-quality mask with clear lenses, a purge snorkel, and comfortable fins. Freediving fins allow you to cover more distance with less effort. A wetsuit or rash guard provides warmth and sun protection in tropical breeding grounds (water is typically 25-28°C). An underwater camera with a wide-angle lens is essential - humpbacks are enormous and often very close. A GoPro on a pole works well. Do not bring any equipment that makes noise or creates bubbles.