Bonnie's Arch
Protected Area
Bat Cave Beach
Why dive here
With 327+ marine species recorded in the area - including barracuda, bull sharks, oceanic whitetip sharks, orcas and sea turtles - Bonnie's Arch offers some of Grand Cayman's richest reef diving. Water ranges 27-31°C, warmest August, September, October.
Bonnie’s Arch. We reckon this site is one of Grand Cayman’s most photogenic spots, especially if you catch it at the right time of day. We’re talking about that sweet morning light, maybe 9 or 10 am, when the sunbeams slice through the water and spotlight the arch itself. It’s a proper swim-through, about 30 feet wide, carved naturally out of the reef, and it often has schools of tarpon just hanging out, shimmering in the shadows. Horse-eye jacks like to cruise through too. Beyond the arch, it’s a lovely mix of coral formations and a small wall that drops to about 21m. Keep an eye out for the cleaning stations; we’ve seen some huge groupers getting a spa treatment from tiny shrimp and gobies there. The visibility usually sits around 25m, making for some clear views. It’s a relaxed dive, good for anyone who enjoys a bit of exploration and wants to capture some classic Caribbean reef shots.
Nearest Dive Centres to Bonnie's Arch
Dive shops near Bonnie's Arch
Silver Thatch Watersports
Atlantis Dive Center
Divers Down
Don Foster's Dive Cayman, Ltd.
SUNSET DIVERS
Divers Supply
Reviews for Bonnie's Arch
Conditions
Ocean conditions, forecast and tides for Bonnie's Arch
Bonnie's Arch Ocean Conditions
Monthly averages for Bonnie's Arch, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (19.38, -81.32) (5km away)
October Averages
Sea Temperature
30°C
87°F · Range: 29.1–31.8°C
Current Speed
4.47 cm/s
Direction: NW (296.6°)
Chlorophyll-a
0.045 mg/m³
Very clear (oligotrophic)
Salinity
36.14 PSU
Based on 4 years of monitoring data · Data sources: Open-Meteo marine data + Copernicus Marine (EU)
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