Sister Bank
Protected Area
Ile Coco National Park
Why dive here
With 183+ marine species recorded in the area - including barracuda, dolphins, sea turtles, sperm whales and lionfish - Sister Bank offers some of Inner Islands's richest reef diving. Water ranges 27-30°C, warmest March, April, May.
Sister Bank is one of those sites where you just feel small, in the best possible way. We’re talking massive granite boulders, sculpted by time and current, that create a maze of swim-throughs and overhangs. It’s about a 35-minute boat ride, and the journey itself feels like you're heading to a proper offshore adventure. Dropping in, the depth varies, but the sweet spot for us is around 15 metres, winding through the rock formations. The light filtering down is beautiful, catching schools of threadfin darting between the cracks. Keep an eye out for the smaller stuff too; we’ve spotted tiny Arc-eye Hawkfish perched on corals and the elusive Bloodspot pipefish hiding in crevices. Visibility averages 14 metres, which is decent enough for the scale of the rocks. You’ll spend a lot of time just exploring the architecture here. We’ve had encounters with eagle rays gliding overhead and even a grey reef shark cruising by on the perimeter. It’s a site that rewards slow exploration and suits divers comfortable navigating through natural rock formations.
Nearest Dive Centres to Sister Bank
Dive shops near Sister Bank
Trek Divers
Plongee Sous Marine
Azurro Pro Dive
Hawksbill Dive Centre
Octopus Diving Centre
Whitetip Divers
Reviews for Sister Bank
Conditions
Ocean conditions, forecast and tides for Sister Bank
Sister Bank Ocean Conditions
Monthly averages for Sister Bank, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (-4.5, 55.52) (2km away)
October Averages
Sea Temperature
28°C
82°F · Range: 26.1–30.1°C
Current Speed
7.28 cm/s
Direction: W (285.9°)
Chlorophyll-a
0.213 mg/m³
Clear water
Salinity
35.24 PSU
Based on 4 years of monitoring data · Data sources: Open-Meteo marine data + Copernicus Marine (EU)
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