Sea of Cortez

The Sea of Cortez — also called the Gulf of California — separates the Baja California peninsula from mainland Mexico, creating a long, narrow body of water that Jacques Cousteau called 'the world's aquarium.' The marine biodiversity is exceptional: whale sharks, sea lions, manta rays, humpback whales, blue whales, and over 900 species of fish inhabit waters that range from warm shallows to deep trenches. La Paz, on the Baja peninsula's southern coast, is the charter base. The city has a pleasant malecon (waterfront promenade), a cathedral, and a marina complex that handles the charter fleet. The airport, served by flights from the US and Mexican cities, is 12 kilometres from the marina. The town's provisioning includes well-stocked supermarkets and a fish market that provides the evening's fresh catch. The immediate cruising ground extends north from La Paz into the Espiritu Santo archipelago — a cluster of desert islands designated as a UNESCO World Heritage site. The islands are uninhabited, their red-rock cliffs and white sand beaches backed by cardon cacti and scrub desert. Los Islotes, at the northern end of the group, has a resident sea lion colony; snorkelling with the pups — curious, playful, and unafraid — is the charter highlight. Whale sharks congregate in La Paz Bay between October and April, and encounters are managed through licensed guides. Swimming alongside a whale shark — the world's largest fish, filter-feeding on plankton in the shallow bay — is a regulated activity with boat and swimmer limits. The wind pattern is benign. The coromuel, a south-westerly afternoon thermal, provides gentle sailing most days. Northerly winds, arriving with Pacific weather systems in winter, can produce choppier conditions but rarely exceed 20 knots. The Sea of Cortez is sheltered from the Pacific swell by the Baja peninsula, and the inner sea is calm by open-ocean standards. The water is warm — 24-30 degrees depending on season. Visibility reaches 20 metres in the island anchorages. The landscape is desert: red, brown, and ochre rock against blue water and blue sky, with no green beyond the cacti and the occasional salt-tolerant shrub. Provisioning in La Paz is good and inexpensive. The islands have no facilities — carry all water, fuel, and provisions. The season runs October through April; summer brings extreme heat (40+ degrees) and the tail end of Pacific hurricane risk.