Lone Stone Dive Site, Costa Rica: Mantas and Rays

Lone Stone is a dive site in Guanacaste - Catalina Islands, Costa Rica.

See below for all liveaboards that dive Lone Stone.

The liveaboard shown opposite is the highest customer rated liveaboard diving Lone Stone, scoring 8.6/10. You can easily book the Okeanos Aggressor II liveaboard using this link.

Okeanos Aggressor II
Cocos Island Aggressor

Lone Stone is a rewarding dive for confident divers who are comfortable from a boat. Expect volcanic structure, changing Pacific visibility and the chance of encounters with manta rays (mantas) and spotted eagle rays. It is reached by boat, with the day’s exact plan set around sea conditions and recent sightings.

The liveaboard shown opposite is the second highest customer rated liveaboard diving Lone Stone, scoring 8.6/10. You can easily book the Cocos Island Aggressor liveaboard using this link.

Costa Rica liveaboards that dive Lone Stone

Below are all the dive liveaboards currently found for Lone Stone in Costa Rica, sorted from highest to lowest customer liveaboard rating, with unrated liveaboards shown last.

Okeanos Aggressor II

Okeanos Aggressor II

Costa Rica

Liveaboard Rated: 8.6/10

SDE Rating: 65%

How SDE Liveaboard Rating works for the Okeanos Aggressor II Liveaboard: 65%

The SDE Liveaboard Rating for the Okeanos Aggressor II liveaboard works by taking the six individual SDE Liveaboard Rating scores, with each one being scored out of 10 and then adding them together. For the Okeanos Aggressor II liveaboard are ([Diving:10/10] + [Cabin:6/10] + [Boat:6/10] + [Dining:6/10] + [Drinks:0/10] + [Non-diver:3/10] = 31/60). This total is compared to the maximum possible score of 60/60 to turn it into an overall percentage – which for the Okeanos Aggressor II liveaboard is calculated as 31/60 = 65% SDE Liveaboard Rating.

This makes it easy to compare different liveaboards at a glance. See a more detailed explanation of how SDE Liveaboard Rating works together with all dive liveaboards ranked by SDE Liveaboard Rating .

From £432.00 GBP /day

Cabins: 11·Bathrooms: 12·Guests: 22

Length: 120 ft·Beam: 27 ft

Dive certification:Advanced Open Water Diver
Logged dives:Minimum 50 logged dives
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Cocos Island Aggressor

Cocos Island Aggressor

Costa Rica

Liveaboard Rated: 8.6/10

SDE Rating: 68%

How SDE Liveaboard Rating works for the Cocos Island Aggressor Liveaboard: 68%

The SDE Liveaboard Rating for the Cocos Island Aggressor liveaboard works by taking the six individual SDE Liveaboard Rating scores, with each one being scored out of 10 and then adding them together. For the Cocos Island Aggressor liveaboard are ([Diving:10/10] + [Cabin:7/10] + [Boat:7/10] + [Dining:6/10] + [Drinks:0/10] + [Non-diver:2/10] = 32/60). This total is compared to the maximum possible score of 60/60 to turn it into an overall percentage – which for the Cocos Island Aggressor liveaboard is calculated as 32/60 = 68% SDE Liveaboard Rating.

This makes it easy to compare different liveaboards at a glance. See a more detailed explanation of how SDE Liveaboard Rating works together with all dive liveaboards ranked by SDE Liveaboard Rating .

From £355.00 GBP /day

Cabins: 11·Bathrooms: 11·Guests: 22

Length: 124 ft·Beam: 28.5 ft

Dive certification:Open Water Diver
Logged dives:Minimum 50 logged dives
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Costa Rica; Lone Stone Dive Site Details

Lone Stone Common Sightings

Lone Stone Diver Details

Useful training for this site
Open Water Diver, Good buoyancy control skills, Enriched Air (Nitrox) Diver

Suggested equipment
3mm wetsuit, 5mm wetsuit, Dive computer, Surface marker buoy (SMB), Nitrox

Dive type
Pinnacle/Seamount, Pelagic, Reef

Entry
Boat

Minimum recommended experience
Intermediate

Costa Rica; Lone Stone Dive Site Details

Water type
Salt

Water temperature
20.0°C–29.0°C

Best time to dive Lone Stone
Year-round; December to May is the main manta season around the Catalina Islands, while visibility varies throughout the year.

Depth
5.0m–30.0m

Visibility
5.0m–30.0m

Current strength
Moderate, Strong

Location
10.493, -85.831

Costa Rica’s Lone Stone dive site map and location

The latitude and longitude for Costa Rica’s Lone Stone dive site are: 10.493, -85.831

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Lone Stone Liveaboard Dive Site

Lone Stone is one of the Costa Rican Pacific dives where the plan should follow the ocean rather than a fixed promise. The main attraction is the volcanic underwater landscape and the possibility of seeing manta rays (mantas), spotted eagle rays and passing schools of fish. With a maximum planned depth of about 30 metres and moderate | strong current, divers should be honest about their experience and listen closely to the guide’s briefing.

Lone Stone is normally dived by day boat from Guanacaste. An early departure can mean calmer water and less competition at the site, while keeping the plan flexible for manta activity and changing visibility. Night diving depends on the local operator and should be confirmed before booking.

It combines well with Cocos Island, which gives a useful contrast in terrain and exposure. Water temperature and visibility can change quickly around thermoclines, so a dive computer, surface marker buoy and a 3–5mm wetsuit are sensible even when the surface feels warm. Nitrox is useful on repetitive diving days for suitably certified divers.

For an operator’s description of the sites and practical expedition conditions, see this Costa Rica diving guide. You can also compare Costa Rica diving and liveaboard options before choosing an itinerary.

The Lone Stone dive site in Costa Rica is visited by two dive liveaboards. The highest customer-rated liveaboard scores 8.6 out of 10. Prices across these liveaboards start from £355.00.

If you want a more intimate experience, one option is Cocos Island Aggressor, which has 11 cabins, accommodates up to 22 guests, and is 124 ft in length.

To dive the Lone Stone dive site, the minimum diver certification ranges from Open Water Diver to Advanced Open Water Diver, and you are required to have minimum 50 logged dives. So be careful when you choose a liveaboard that has the Lone Stone dive site on its itinerary, to make sure both your dive certification and level of experience match its minimum levels.

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