North Seymour

A current-swept channel dive delivering whitetip reef sharks, eagle rays, and occasional hammerhead schools at a shallow, action-packed site near Baltra.

Overview

North Seymour is a channel dive site between North Seymour Island and Baltra, where tidal currents funnel nutrients and attract concentrations of pelagic and reef species. The relatively shallow maximum depth of 18 meters belies the site’s intensity — strong currents can create genuine drift dive conditions, and the mix of rocky reef, sandy patches, and open blue water brings together whitetip reef sharks, eagle rays, sea lions, and occasional hammerhead schools. Its proximity to Baltra airport makes it one of the first or last dives on many Galapagos itineraries.

Site Information

• Location: Channel between North Seymour Island and Baltra, Galapagos Islands
• Entry Type: Boat dive
• Site Type: Reef
• Difficulty Level: Advanced
• Maximum Depth: 18 meters
• Typical Visibility: 10-18 meters (30-60 feet)
• Current: Moderate to strong (tidal channel currents)
• Best Time: Year-round; stronger currents during tidal changes bring more pelagic action

Marine Life

Whitetip reef sharks are the most reliable encounter, often seen resting on the sandy bottom in groups or actively hunting along the reef edge. Spotted eagle rays glide through the channel, sometimes in groups of four or five. Scalloped hammerhead sharks make appearances in the blue water beyond the reef, especially during the cool season. Galapagos sea lions hunt and play throughout the site. Garden eels occupy the sandy patches between rock formations, swaying in the current. Schools of black-striped salema, barracuda, and creole fish fill the water column. Green sea turtles, moray eels, and reef fish round out a diverse cast.

Dive Profile

The dive is typically conducted as a drift, entering upstream and letting the channel current carry divers along the rocky reef. The bottom is a mix of rocky reef outcrops and sandy channels at 12-18 meters. Whitetip sharks are often found on the sandy bottom between rocks. Eagle rays tend to pass through mid-water. The dive plan depends heavily on current direction and strength — guides read the conditions and select entry and exit points accordingly. In strong current, divers may need to tuck behind rock formations to observe marine life before drifting to the next shelter.

Entry and Exit

Short panga ride from day boat or liveaboard in the channel. Giant stride entry upstream of the planned drift path. Negative entry may be required in stronger currents. The panga follows divers’ bubbles throughout the drift dive. Exit via SMB deployment for panga pickup at the downstream end of the dive. In calm conditions, a return swim to the boat may be possible, but drift diving is the standard approach.

Tips and Recommendations

• Check the sandy patches carefully for resting whitetip sharks — they blend in surprisingly well against the sand
• Time your dive with the tidal current for maximum pelagic activity; slack tide produces calmer but often less exciting conditions
• Look into the blue water beyond the reef edge for hammerheads, especially during June to November
• The shallow depth means excellent bottom time — use it to observe behavior rather than rushing between subjects
• Carry a reef hook in case current is stronger than expected and you want to hold position at a productive spot

Safety Considerations

Tidal channel currents are the primary hazard and can be significantly stronger than expected, especially during spring tides. Despite the shallow maximum depth, the current can make this a demanding dive. Divers can be swept out of the channel into open water if they stray from the reef. Maintain proximity to your guide and group. The shallow depth reduces decompression risk but does not eliminate the need for a safety stop. Standard Galapagos equipment and thermal protection apply. Carry an SMB, whistle, and mirror.

Photography

Eagle rays passing overhead against blue water make excellent wide-angle subjects. Resting whitetip reef sharks on sandy bottom are best shot with a wide-angle lens from a low angle, approaching slowly. Garden eels require a macro lens and extreme patience — they are skittish and retract at the slightest disturbance. The shallow depth means excellent natural light, reducing dependence on strobes. The current can make steady shooting challenging — brace against rocks (without damaging reef) or use higher shutter speeds to compensate. This is primarily a wide-angle site.

Sources: Scuba Iguana – North Seymour Channel, The Portuguese Traveler – North Seymour & Mosquera, Academy Bay Diving – Galapagos Dive Sites, Galapagos Diving Day Trips – North Seymour Canal. Last updated 2026-05-30.