Diving along the northern Pacific coast of Costa Rica is not about coral gardens like the Caribbean. It is about rock, current and big life: pinnacles rising from the seabed, ledges where eels hide, and open water where schools of fish and larger animals pass by. The Catalina Islands are among the best known sites in the region, and the dive we link is a fun dive trip for certified divers with two dives from a boat. Divers who return to the Catalinas often mention rays, sometimes in impressive numbers, along with turtles, moray eels, octopus and large schools of snapper and jacks. Visibility can be modest, and the water can be cool and green when plankton blooms, but on the best days it clears to a blue that makes the rock formations spectacular. The dive centre we link operates out of Tamarindo, so the boat ride starts nearby rather than from a distant marina, and the crew handle tanks, weights and briefings. Because this is a certified-only trip, you should bring your certification card and a log book, and the centre will ask about your recent experience, as currents and depth call for confidence.
How it works
You book a date, and the dive centre confirms the meeting time and place, usually early in the morning for two dives with a surface interval. Details such as equipment rental, the number of divers per guide, the maximum depth and the dive sites chosen for the day depend on the option and the conditions, so read the inclusions on the ticket and confirm them with the centre. Bring your certification card, and tell the centre about any medical conditions, as a questionnaire is normal.
What to expect
The briefing explains the site, the planned depth and the signals, and the guide leads the dive. Currents can be mild or strong, so stay with the group and monitor your air. The scenery is dramatic, with boulders, swim-throughs and sloping walls, and the guide knows where animals shelter.
You may see rays gliding in the blue, schools of fish pulsing around you, and small critters under ledges. Water temperature varies with season, and a wetsuit is recommended. After the second dive, the boat returns to shore, and many divers share notes over a cold drink.
Making the most of it
Do not fly within the recommended period after diving, so plan your itinerary accordingly. Bring reef-safe sunscreen, a towel, snacks and a camera with a protected housing if you own one. If your certification is old, consider a refresher, and if you are not certified, look at the snorkelling trip instead. The dry season generally offers calmer seas, and the green season can bring richer plankton and stronger currents. Always dive within your limits and follow the guide's instructions.
Good to know
Dive centres along this coast take safety seriously, and a short orientation dive or equipment check is common if you have not dived recently. Give yourself a day without flying before or after diving, check your insurance covers diving, and let the guide know if you are returning from an injury or illness.
Because visibility and currents vary, it is wise to be flexible about which site you visit and to trust the guide's choice for the day. Bring a dive computer, a surface marker buoy if you own one, and a reusable water bottle to keep hydrated between dives.
What to expect
The experience
A two-dive boat trip to the Catalina Islands for certified divers, run by a dive centre in the Tamarindo area.
Best time
Dry-season mornings tend to be calmer; plankton and currents shape visibility in the green season.
How long
About four to five hours including the boat ride and a surface interval.
Tips
Bring your certification card and log book, wear a wetsuit, and respect no-fly time after diving.
Quick picks
- Best for
- Certified divers who like pinnacles, currents and big marine life more than gentle reefs.
- Families
- Not suitable for young children; minimum age rules apply, and snorkelling is a better family choice.
- Couples
- A shared adventure for dive-certified couples, with plenty to talk about afterwards.
- Pair with
- A rest day on the beach, then a sunset sail without sea legs.
- Time needed
- Allow the morning and early afternoon.
Good questions
Do I need to be certified?+
Yes. This trip is for certified divers only, and you should bring your certification card.
Can beginners try diving?+
Dive centres in Tamarindo offer discovery courses, but this fun-dive trip is not designed for beginners.
What will I see?+
Rays, turtles, eels, octopus and schools of fish are all possible, though sightings vary by day and season.
How is visibility?+
It varies from modest to excellent depending on plankton, tide and weather.
Should I bring my own gear?+
Rental equipment is often available, but confirm what is included and bring a mask and dive computer if you have them.