El Arco - Caribbean Coast
El Arco is a site we’ve developed a real fondness for on the Caribbean side. It’s not the dramatic wall diving you might find elsewhere, but it offers a genuinely rewarding experience for those who appreciate the smaller, more intricate scenes. The site is characterised by a series of ledges and small overhangs, giving the impression of miniature arches, hence the name. We love exploring the nooks and crannies here. Keep your eyes peeled for the chestnut morays peering out from their rocky hideouts, their patterned skin surprisingly camouflaged against the dark rock. We’ve often found Panama sergeant majors darting around the shallower areas, a splash of electric blue in the sunlit water. Down a little deeper, we’ve spotted the elusive whitesnout searobin, almost blending into the sandy patches, and if you’re lucky, a bluntspine blenny peeking out from a shell. The gentle currents here make it a relaxing dive, perfect for photographers wanting to take their time getting that perfect shot of a fringed flounder half-buried in the sand. It’s a site that rewards patience and a keen eye, ideal for macro lovers and anyone who enjoys a peaceful drift.
- Location
- Caribbean Coast, Costa Rica, Central America
- Coordinates
- 8.710176, -83.893330
Marine Protected Area: Isla del Cano
Best Time to Dive in Caribbean Coast
The warmest water temperatures in Caribbean Coast occur in March, averaging 29.8°C. The coolest conditions are in November at 27.6°C.
Monthly Water Temperatures
- January: 28.9°C
- February: 29.6°C
- March: 29.8°C
- April: 29.6°C
- May: 29.1°C
- June: 28.4°C
- July: 28.6°C
- August: 28.5°C
- September: 28.5°C
- October: 28.1°C
- November: 27.6°C
- December: 28.4°C
Nearby Dive Sites in Caribbean Coast
Nearest Dive Centres to El Arco
Marine Life in Caribbean Coast
Home to 218 recorded species including 198 reef fish, 11 hard corals, 5 whales & dolphins, 3 other, 1 seagrass & algae.
Notable Species
- Sleeper (Gobiomorus maculatus) - Reef Fish
- Lesser Starlet Coral (Siderastrea radians) - Hard Corals
- Barred Livebearer (Poeciliopsis turrubarensis) - Reef Fish
- Cowfish (Tursiops truncatus) - Whales & Dolphins
- Lettuce Coral (Agaricia agaricites) - Hard Corals
- Spotted Sleeper (Eleotris picta) - Reef Fish
- Lamarck's sheet coral (Agaricia lamarcki) - Hard Corals
- Pointed Pencil Coral (Madracis asperula) - Hard Corals
- Green Turtle (Chelonia mydas)
- Bridled Dolphin (Stenella attenuata) - Whales & Dolphins
- Mustard hill coral (Porites astreoides) - Hard Corals
- Giant goby (Gobiomorus dormitor) - Reef Fish
- Mulet (Mugil curema) - Reef Fish
- Scroll Coral (Agaricia undata) - Hard Corals
- Yellowtail Parrotfish (Sparisoma rubripinne) - Reef Fish
- Barber (Acanthurus bahianus) - Reef Fish
- Elkhorn coral (Acropora palmata) - Hard Corals
- Blue Doctor (Acanthurus coeruleus) - Reef Fish
- Graham's sheet coral (Agaricia grahamae) - Hard Corals
- Sleeper (Eleotris amblyopsis) - Reef Fish
Recommended Packing List for El Arco
Based on average water temperature of 28.8°C, currents 3 cm/s.
- Shorty or Rashguard - warm 29°C water needs minimal exposure protection
- Mask - essential for every dive
- Fins
- BCD - buoyancy compensator
- Regulator - your most safety-critical piece of gear
- Dive Computer - tracks depth, time, and NDL
- Surface Marker Buoy (SMB) - essential for boat pickups
- Dive Torch - useful for crevices and colour at depth
- Underwater Camera - capture your diving memories