Plan your Big Island activities in one conversation.

The Big Island's signature activities are the manta ray night snorkel on the Kona side, stargazing from Mauna Kea, and volcano tours around Hawai'i Volcanoes National Park. Snorkeling at Kealakekua Bay, Hilo-side waterfalls, and Kona coffee farm tours round out the shortlist. Every tour here links to the operator's live booking calendar.

Five to seven days is enough to do both sides of the island without rushing: water mornings on the Kona side, a volcano day, a summit evening, and a Hilo waterfall day. The Trip Planner can build the day-by-day plan around your dates.

Many are. Minimum ages vary by operator and are listed on each tour page, and gentler options like morning sail-and-snorkel trips and easy waterfall walks work well for families. Tell the Trip Planner the ages and it narrows everything down for you.

The island is warm year-round. Humpback whales visit between roughly December and April, summer usually brings the calmest snorkeling water, and manta rays and stargazing are good in every season.

Most activities include free cancellation up to a cutoff the operator sets. The exact policy varies by tour, so check the cancellation terms on the tour page and on the operator's booking calendar before you book.