Siargao's dive sites are almost entirely boat-accessed reef and wall formations, with the majority accessible to beginners. Drop-offs, caves, and cavern systems add structural variety, reaching their most dramatic expression at Blue Cathedral, where deep walls and cavern passages demand advanced skills. Green Sea Turtle and Bluespotted Fantail Ray are observed across the full range of sites, while Whale Shark and Grey Reef Shark appear regularly. Conditions favour the drier months from late summer into spring.
Monthly water temperature across Siargao's sites, from satellite sea-surface data corrected for depth. The band shows the site-to-site spread.
Water temperature stays warm throughout the year, rising slightly from the early months into mid-year and holding through the latter part of the year. The histogram of logged dives points clearly to March as the peak, with October also drawing strong activity, suggesting calmer and clearer conditions bookend the wetter mid-year period. Divers planning around the best conditions should aim for the dry-season window centred on late winter through spring.
4 operators
4 more sites to explore
Water temperature around Siargao ranges from about 28°C in January to 30°C in May, based on satellite sea-temperature data for its dive sites.
With water around 28–30°C, a rash guard or 3mm shorty works in Siargao year-round.
Fin maps 11 sites in Siargao (8 scuba diving sites and 3 snorkelling spots).
Across Siargao's dive sites, March are most often reported as the best months to visit.
Siargao has a strong record of observation-backed sightings across a wide range of species. Green Sea Turtle and Bluespotted Fantail Ray are logged as very common across all sites. Whale Shark and Grey Reef Shark are recorded as common, and Great Barracuda also appears regularly. Less frequent but observed sightings include Hawksbill Sea Turtle, Mimic Octopus, and Bottlenose Dolphin.
The majority of sites in Siargao are rated beginner-friendly, including Santa Monica, Burgos, Dapa, Casulian, Pilar, and Daku Arch. Most of these follow reef slopes and walls to manageable depths, making them accessible to newly qualified divers. Blue Cathedral is the clear exception, combining deep walls, caves, and cavern passages that require advanced certification and experience.
All of the listed dive sites in Siargao are reached by boat. There are no shore-entry sites in the data. Divers will need to arrange boat transport, typically through a local dive operator, to reach sites such as Daku Arch, Pilar, and Blue Cathedral.
Reef slopes and walls dominate the site mix, appearing across nearly every site. Several sites also feature caves and cavern formations, most notably Blue Cathedral, which combines drop-offs with cavern passages at depth. Daku Arch adds pinnacle terrain and swim-throughs for variety at shallower depths.
