Sirenas Adventures

For two decades, Sirenas Adventures has built its reputation in Coco, Costa Rica, on two things: private, personal trips and a genuine commitment to safety, which the team puts first above all else. Their style is unhurried and crowd-free — they favour the more remote sites and run a private boat. Though it's rated for 14 passengers, they deliberately limit guest numbers so there's plenty of room aboard, and they choose dive sites to match your experience level.

Diving and what to expect

A PADI Resort with two PADI Instructors, Sirenas offers PADI Scuba Diving, Freediving, Snorkelling and First Aid (EFR), backed by an onsite training pool and classroom, air fills, nitrox, and equipment sales and rental. Local sites include Cacique and Tortuga, where divers may encounter sharks, whales, turtles and ocean fish.

Rather than a standard surface interval, the crew might find a beach to explore, snorkel a quiet cove, or cruise in search of whales and dolphins, with fresh fruit, snacks and water always on hand. English and Spanish are spoken — a relaxed, safety-minded choice for divers who'd rather skip the crowds.