Diving the seamounts in Costa Rica

Diving the seamounts in Costa Rica

Here you will find the best seamount dive sites in Costa Rica — 0 spots with depth, level, current and the liveaboards that visit them.

Seamount diving in Costa Rica — what to expect

Costa Rica is where seamount stops being a plan on paper and becomes the dive you keep talking about.

A seamount is an underwater mountain that never breaks the surface, rising from the deep in open ocean. Currents hit its flanks and push up nutrients, which makes seamounts magnets for sharks, tuna and other pelagic life. Here you will find the best seamount dive sites in Costa Rica — 0 real spots with depth, level, current and access. Compare conditions, season and marine life, then pick the site that matches your certification and experience. Every listing links to the liveaboards and dive resorts in Costa Rica that actually visit these sites.

Why divers fly to Costa Rica

The most breathtaking seamount dive sites in Costa Rica

Every seamount dive site in Costa Rica worth planning a trip around — ranked by what you actually see underwater and how reliably it can be dived.

Depth, level, current, best season and the liveaboards that dive them: all 0 dive sites in one place.

…

Editorial ranking

Top 15 seamounts worldwide

Our editorial top 15, based on how often each site appears in published best-of rankings, dive guides and operator reports.

From bucket-list classics to lesser-known gems, these sites cover the full range of experience levels and conditions.

Compare depth, current, access and the liveaboards that reach each site to plan your next underwater adventure.

© Esri — Maxar, Earthstar, GIS
1

The Boiler (San Benedicto)

Mexico (revillagigedo/socorro)

Seamount manta cleaning station drawing oceanic mantas

Suitable for
—
Current
—
Access
—
Depth
—
Theme
Seamount
sites
—
© Esri — Maxar, Earthstar, GIS
2

Roca Partida

Mexico (revillagigedo)

Tiny remote seamount, sharks stacked in current, deep drop-offs

Suitable for
—
Current
—
Access
—
Depth
—
Theme
Seamount
sites
—

Decompression chambers in Costa Rica

Verified hyperbaric facilities that cover the diving areas of in Costa Rica. Always confirm availability locally before a trip and dive with valid insurance.

LocationFacilityRelevant for
San JoséHospital CIMA San José, hyperbaric chamber therapy unitPacific coast diving and Cocos Island evacuations (no chamber on Cocos)

Liveaboards diving in Costa Rica

Liveaboard diving in Costa Rica means more dive sites per trip: these vessels run real, bookable departures with cabins for solo divers, buddy teams and small groups. Compare boat size, cabin layout, dive deck and nitrox, then check the cheapest price per day before you book. Every Costa Rica dive safari below is confirmed with live availability and current operator pricing.

Cocos Aggressor liveaboard diving in Costa Rica – view trips, cabins and prices

Cocos Aggressor

Costa Rica

$636
Sea Hunter liveaboard diving in Costa Rica – view trips, cabins and prices

Sea Hunter

Costa Rica

$690
Okeanos Aggressor II liveaboard diving in Costa Rica – view trips, cabins and prices

Okeanos Aggressor II

Costa Rica

$504
All liveaboards in Costa Rica

Conditions & practicalities

Diving in Costa Rica: seasons, conditions and logistics

0 dive sites in Costa Rica — here is what the season data says about the best months, water temperature, visibility and currents, plus how divers usually get there and which fees to budget for.

Best months
Jun–Dec
Water temperature
24–28 °C
Visibility
15–30 m
Currents
Moderate — Expect noticeable water movement on channels, pinnacles and outer reefs. Drift technique, an SMB and a guided descent turn these into easy, relaxed dives.
Getting there
Most divers fly into the nearest international airport and continue by transfer or domestic flight to the departure port; liveaboards usually leave the evening before day one.
Permits & fees
Marine park fees, port taxes and nitrox are rarely included in the trip price — budget a few hundred dollars extra and check the visa rules before booking.

FAQ

Diving in Costa Rica FAQ

When is the best time to dive in Costa Rica?
Diving conditions in Costa Rica change throughout the year. Check our month-by-month best-time-to-dive guides to plan around peak visibility, weather and marine life encounters.
Do I need a liveaboard to dive in Costa Rica?
A liveaboard gives you access to remote dive sites in Costa Rica that day boats cannot reach, plus 3–5 dives per day in maximum comfort. For the best dives in Costa Rica, a liveaboard is the recommended choice.
What certification do I need to dive in Costa Rica?
Most Costa Rica liveaboards require Open Water as a minimum, with Advanced Open Water and 30+ logged dives recommended for currents and deeper sites. Some expert routes require Tech or 100+ dives.
How much does a Costa Rica liveaboard cost?
Liveaboard prices in Costa Rica typically range from €1,500 to €6,000+ per week depending on vessel category, route length and season. Browse the boats below for live pricing.
Do I need a visa for Costa Rica?
Visa requirements vary by your nationality. Always check the latest entry rules with the destination's official government source before booking flights.
Is diving in Costa Rica safe for beginners?
Many Costa Rica sites are beginner-friendly, but some routes feature strong currents or deep walls suited only to experienced divers. Check each vessel's recommended experience level.
Plan your trip

Ready to dive in Costa Rica?

Explore the Costa Rica destination guide or search liveaboards that visit these sites.

Costa Rica destination guideLiveaboards in Costa Rica