The Montebello Islands feature beautiful beaches, bays and lagoons fringed by mangroves, and surrounded by luxuriant gardens of corals and colourful tropical fish, and form one of the most beautiful and important marine areas anywhere along the Western Australian coast. Kimberley Expeditions depart from the Exmouth marina. We plan to spend the next 8 days exploring the Murion, Monte Bellos and Mackerel Islands. The Monte Bello and their adjacent waters are havens for large marine animals such as humpback whales, dugongs and several species of marine turtles, and are stopover areas for rare and protected migratory wading birds. The perfect environment for bird watchers, snorkellers and divers.

Enjoy the actiivities on hand during the day. During the evening dine on local seafood delights such as Mudcrab, tropical crayfish, fresh fish and calamari.

Explosive history

The Montebello Islands have a long history of European contact, which began with the wreck of the English East India Company vessel the Trial, on the Trial Rocks (outside the marine park) in 1622—Australia’s earliest known European shipwreck. The 46 survivors from the wreck who landed on the Montebello Islands were the first recorded Europeans to land on the islands. The Wild Wave was wrecked at the Montebello Islands in 1872, and the Marietta was wrecked there in 1905. A number of uncharted wrecks also lie within the marine park and in adjacent reserves, including pearl luggers lost over the years during cyclones.

However, the Montebello Islands are notorious for the fact that three British nuclear weapons tests were carried out there in 1952 and 1956. The 1952 test, called Operation Hurricane, saw a 25-kiloton bomb exploded inside the hull of the HMS Plym, a frigate anchored in 40 feet of water, 400 yards off Trimouille Island. The explosion left a saucer-shaped crater—20 feet deep and 1,000 feet across—on the sea floor. Testing carried out for Operation Mosaic in 1956 saw a 15-kiloton device exploded on Trimouille Island and a 98-kiloton bomb exploded on Alpha Island—the largest nuclear weapon ever tested on Australian soil. Remains of the associated military activities including scrap metal, disused roads and the foundations of former British military operational headquarters can still be found on some islands..


Is from the Exmouth Marina although we can tailor the cruise to suit groups requirements

Travel Insurance

Kimberley Expeditions strongly recommends you have comprehensive travel insurance to cover all emergency medical situations and cancellation refunds.

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  • 30% non-refundable deposit to be paid to confirm your reservation
  • 70% (being the balance) is due 60 days before the charter
  • If cancellation occurs at the operator’s discretion (i.e. due to weather) a full refund will be given
  • Cheques to Odyssey Vessel Management Pty Ltd or Kimberley Expeditions, cash and Visa or MasterCards can be accepted. If you prefer to direct debit we can supply you with our bank details