Morro Bay sits on California's Central Coast, offering both shore and boat diving across estuarine and open ocean environments. The five sites here range from shallow pier pilings and bay-side muck dives to the offshore Buchon Reef pinnacle, which reaches depths suited to intermediate divers. Water is cold throughout the year, typically between eleven and fifteen degrees Celsius, with spring often the coldest period due to upwelling. Visibility is the key variable: bay sites can drop to a metre or two on poor days, while offshore reefs offer up to thirty metres when conditions allow. The area is particularly well regarded for nudibranch diversity, with multiple dorid and aeolid species recorded, alongside lingcod, California sheephead, harbor seals, and egg-yolk jellyfish.
Monthly water temperature across Morro Bay's sites, from satellite sea-surface data corrected for depth. The band shows the site-to-site spread.
Water temperature dips to around eleven or twelve degrees Celsius in spring due to coastal upwelling and recovers to around fourteen or fifteen degrees by autumn. Visibility in the bay is unreliable and often low, so offshore sites like Buchon Reef are best targeted on settled days with calmer swells.
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United States
Water temperature around Morro Bay ranges from about 12°C in April to 14°C in August, based on satellite sea-temperature data for its dive sites.
With water around 12–14°C, a 7mm or semi-dry suit works in Morro Bay year-round.
Fin maps 5 sites in Morro Bay (5 scuba diving sites and 1 snorkelling spots, with some suited to both).
2 more sites to explore
