Catalina Night Dives: Explore Avalon’s Kelp Forest After Dark

On a moonless evening in Avalon, Santa Catalina Island, the water at Casino Point is a black mirror that takes on new life when you slide beneath the surface. Night Dives at Catalina Divers Supply drop you by shore into a kelp forest that, after sunset, becomes an amphitheater for octopus, lobsters, and moray eels. The dive park’s submerged boulder fields and vertical kelp stipes—populated by Macrocystis pyrifera—create pockets of shadow that nocturnal creatures exploit; illuminated by a narrow beam, each crevice can reveal a new species.

This is a shore-based, three-hour guided experience that demands Open Water certification and a pair of reliable lights (a primary and backup). If it’s your first night dive, Catalina Divers Supply requires coursework and a prior guided day dive at the Casino Dive Park before you descend under the dark. No boat is needed; the check-in and entry are done steps from the Casino’s shoreline, making remote, wildlife-rich diving unusually accessible.

What makes these night dives special is the change in behavior: grazing fish bed down, crustaceans roam, and octopus actively hunt across rock faces. Visibility varies with swell and surge; expect to navigate around kelp blades and boulders rather than long sandy runs. The seafloor here includes mixed sediment and rocky outcrops—perfect habitat for moray eels and the spiny lobsters that emerge after dusk. The area sits beside Avalon’s historic Casino building (completed 1929), a cultural landmark visible above water that anchors the dive site in town history.

Beyond wildlife viewing, these dives offer real training value—night navigation, light discipline, and buoyancy control under low-contrast conditions. Guides emphasize slow, methodical movement to minimize disturbance and maximize sightings. Bring or rent two lights; the operators stock backup gear, but experienced divers usually come prepared.

Conservation-minded divers will appreciate Casino Point’s protected status and the local emphasis on low-impact practices: no-touch policies, proper finning to avoid kelp damage, and careful handling of flares and surface-signaling devices. For travelers staying in Avalon, the convenience of a walk-in night dive that yields high species density and dramatic, flashlight-lit encounters makes this an unusually rewarding way to experience Catalina’s marine life after dark.

Check in at Catalina Divers Supply on the Avalon waterfront; guides run a thorough pre-dive brief covering entry and exit points at Casino Dive Park, emergency procedures, and species to watch for. Typical water temperatures range from the mid-50s to low-70s°F depending on season, so a 5–7mm wetsuit with hood is common in cooler months. Surface-supplied float lines and a surface tender may be used for first-time night divers; strong swimmers with good buoyancy control will get the most out of the outing. Book early—night slots fill quickly, especially on weekend charters. Reserve soon.