Richelieu Rock is a seamount rising from the seafloor and its home to a huge amount of sea life. There are two summits and around these schooling fish are abundant.
Richelieu Rock is a seamount in the Andaman Sea and close to the Surin Islands. It's mostly reached by liveaboards leaving from Phuket or Khao Lak. The best months are from November to April. Around the end of the drier season, whalesharks or manta rays can be spotted.
“Incredibly majestic, curious and absolutely mesmerizing!” Up close shark viewing in a cage in beautiful clear blue water with 125 – 150 foot visibility!
The great white sharks arrive sometime in July and usually depart by late November. Under normal circumstances you’ll never fail to see them during that time. It’s because of the really high shark concentration at Guadalupe Island. It is not uncommon to have more than one shark around the cages on some days. However, there are slight variations to what you can see:
The first male and smaller female sharks show up in July. That’s why most tour operators start their trips by the end of July. The last trips are usually offered mid-November, end of November. However between July and mid-September you will ‘only’ see the male sharks or smaller female ones. By the end of September the first huge mature female sharks (18 ft) start showing up. By mid-October the numbers of sharks go down slightly. However, the chance of encountering those spectacular female sharks is at its highest during October/November.
Weather and Water Temperature
Very warm during the day and cooler at night. Summer clothing should be fine. Bring a sweater, pants and a windbreaker/rain jacket. From July to November the average daytime temperature ranges between 73 and 78° F (23-26° C). It’s slightly cooler in November. The ocean is at its calmest during these months. But still, keep in mind that the weather can get rougher on the way forth and back. The water temperature ranges between 72° F (22° C) in August/September and 68° F (20° C) in October/November. A 5mm – 7mm wetsuit with a hood is recommended.
Crowds are not an issue, as only few operators are heading to this island. But still, book well in advance if possible. The shark diving trips to Guadalupe Island became more popular in the recent years.