Isla Espiritu Santo offers a concentrated range of dive site types: reef pinnacles and drift dives for advanced divers at El Bajo, wreck diving on the Fang Ming Wreck and the Salvatierra, and shallow reefs like Swanee Reef and El Bajito that suit beginners well. The California Sea Lion and Cortez Rainbow Wrasse are reliably present across most sites, with Whale Shark encounters possible seasonally. All diving is boat access.

Monthly water temperature across Isla Espiritu Santo's sites, from satellite sea-surface data corrected for depth. The band shows the site-to-site spread.
Water temperature climbs through summer and peaks in late summer and early autumn, when conditions and marine life activity draw the most divers. Cooler months from January through April bring stable, comfortable water and are still productive. The exposed seamounts at El Bajo are subject to current, so conditions there vary considerably by season.




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Water temperature around Isla Espiritu Santo ranges from about 21°C in January to 28°C in September, based on satellite sea-temperature data for its dive sites.
In the warm season (about 28°C) a rash guard or 3mm shorty is comfortable in Isla Espiritu Santo; in the coldest months (about 21°C) step up to a 5mm suit.
Fin maps 29 sites in Isla Espiritu Santo (26 scuba diving sites and 8 snorkelling spots, with some suited to both).
Across Isla Espiritu Santo's dive sites, May, June, August, September, October and November are most often reported as the best months to visit.
The California Sea Lion is encountered regularly across many sites, and the Cortez Rainbow Wrasse and King Angelfish are among the most frequently observed reef fish. Jewel Moray, Panamic Green Moray, Cortez Angelfish, and the distinctive nudibranch Felimare californiensis are all well-represented. Whale Shark encounters are occasional rather than guaranteed.
A good share of the sites are rated beginner level, including Swanee Reef, San Rafaelito, Los Islotes, El Bajito, and the Fang Ming Wreck. These offer shallow to moderate depths and accessible topography. Advanced divers are catered for at El Bajo, where pinnacle and drift diving in strong currents demands more experience.
The island's dive sites span reefs, walls, pinnacles, caves, drift dives, and wrecks, offering considerable variety in a compact area. The Fang Ming Wreck and Salvatierra sit at moderate depths and have developed into thriving artificial reefs. Los Islotes combines reef, wall, and cave sections in a single site. The offshore seamounts at El Bajo provide the most exposed and physically demanding diving.
Several operators based in La Paz serve the island, including La Paz Explorer, La Paz Divers, Dive in La Paz, Cantamar Tours and SCUBA La Paz, Baja Blue Diver, and Fun Baja. All diving here is boat access, so booking through a local operator is the standard approach.