Whale Shark Tours. From mid-May through September hundreds of whale sharks gather in the waters near Isla Mujeres, with peak season in July and August. Trips can be booked anywhere on the island, but official operators who have agreed to uphold certain standards and implement safety measures to protect the sharks operate mostly out of dive shops and charge a set price of $125 (2011) with possible discounts available for multiple trips; street vendors will charge as little as $80 per trip, but be aware that these are not official tours. Tours will generally include breakfast, snorkeling gear, 8-10 people per boat, a 45-60 minute trip out to the whale shark area, and then 3-4 trips in the water with the sharks for 2-15 minutes each time, depending on the number of sharks (more sharks, more time in the water). The return trip includes lunch, ceviche, and a snorkel at a local reef. All passengers must wear life-jackets in the water unless you have your own wet suit, a useful tip since it is much easier to swim with the sharks in a wet suit than it is in a bulky life jacket. $0-$125.
