Scuba Diving in Sea of Cortez

The scuba diving in the Sea of Cortez is all about sea lions, whale sharks, manta and mobula rays, dolphins, huge schools of fish, and fascinating underwater macro life. It is one of the easiest "big animal" destinations to reach and enjoy from the United States.

La Paz, Cabo Pulmo, Loreto, and the northern Sea of Cortez all have excellent diving. You can dive the Sea of Cortez via liveaboard or a dive resort.

View the Sea of Cortez's Location on Google Map

The Sea of Cortez is a special place situated between Baja, Mexico, and the mainland. Water of all shades of blue sits against an arid desert backdrop and an assortment of islands. The Baja peninsula is home to unique flora and fauna that have evolved in near isolation, so it's no surprise that the Sea of Cortez diving features magnificent marine life. Cabo San Lucas is home to Land's End, a narrow strip of land where the Pacific Ocean meets the Sea of Cortez. There is a famous arch, several unique dive sites, and accommodations for all sides of the nightlife spectrum.

For divers, La Paz is the most popular destination. It is the capital city of Baja California Sur, Mexico, and is situated on the coast about 2 hours north of Cabo San Lucas, on the Sea of Cortez side of the peninsula. Cabo Pulmo is a very small town located between Cabo and La Paz, offering fascinating diving within a protected marine park.

Moving North into the Sea of Cortez we find Loreto, a much smaller destination than La Paz, but also with excellent diving. North of Loreto is very remote and the dive sites are best reached by liveaboard with easy access from Puerto Pensaco, a short drive from Phoenix, Arizona. The cost of diving on the Sea of Cortez is much more affordable than many other destinations where divers look for the same large marine life, and short flights from the southwestern United States make travel easy. For an in-depth look at Baja California scuba diving highlights, explore our detailed guide.

For those interested in capturing the vibrant marine life of the region, our Sea of Cortez Photo Workshop – 2027 offers expert-led photography sessions amidst encounters with sea lions, whale sharks, and more. 

Much of the Sea of Cortez is managed through marine parks and local regulations, particularly around Cabo Pulmo, Los Islotes and the whale shark areas near La Paz. Operators follow strict rules on approach distances, group sizes and how close you can get to animals, and good buoyancy plus a no‑touch, no‑chase approach are essential to keep these encounters sustainable.

Sea Of Cortez Marine Life & Photography Subjects

The Sea of Cortez has a reputation for whale sharks. During the summer and fall, divers flock to the Sea of Cortez for a chance to swim with whale sharks. These gentle giants generally move south as the season gets later.

Shark lovers should look for bull sharks in Cabo Pulmo, and can see blues, makos, and silkies on a Cabo marine life safari. Hammerhead sharks can be spotted by lucky divers at El Bajo, Las Animas, and Gordo Banks.

During the winter months, mobula rays are quite commonly seen in the Sea of Cortez, especially on night dives. Latitude Encounters offers wildlife expeditions, exploration trips, and much more, perfect for guests who wish to experience a different part of the planet with adventures.

Another main attraction for diving La Paz are the sea lions, which frolic and play with divers, presenting amazing photo opportunities. Sea Lions are found in a number of places in the Sea of Cortez, but none beat the sea lion colony of Los Islotes.

Other Sea of Cortez marine life includes huge schools of jacks and bait balls, as well as tuna, wahoo and lots of other fish, dolphins, eels, jawfish, rays.

The Sea of Cortez also offers great macro photography opportunities with critters like nudibranchs, snails, jawfish, pikeblennies, signal blennies; and various crabs and shrimps to photograph.

Diving Conditions

• Water Temperatures: 68 - 84F (20 - 29C)
• Visibility: 50 - 115 feet (15 - 35m)
• Depth Range: 16 - 130 feet (5 - 40m)

Typical Sea Of Cortez Dive

Pangas (classic Mexican wood and fiberglass boats) are the norm for resort diving. Several operators have larger, more "traditional" dive boats. Resort-based diving can often involve long boat rides to dive sites - sometimes exceeding two hours each way.

Liveaboards will dive from their tender boats. Dives in the Sea of Cortez can be a shallow "fishbowls" with fantastic vis or deep dives in stiff current looking for hammerhead sharks, so there are options for everyone.

Learn about Bluewater's Cabo Marine Life Safaris in Cabo and the Sea of Cortez.

La Paz is serviced by Manuel Mrquez de Len Airport (LAP), with most flights arriving from Mexico City or Guadalajara. Once on the ground, it's a quick shuttle ride to the dive resorts. Divers visiting Cabo Pulmo can fly into Los Cabos International Airport (SJD), which is about an hour away. This is also the airport for Cabo San Lucas.

Loreto has an international airport (Loreto International Airport – LTO), however, flights are more limited than in the larger cities. Renting a car is easy, but be aware that insurance requirements in Mexico differ greatly from US requirements and add a significant increase to the overall rental cost. 

Sea of Cortez liveaboards depart from Cabo for southern Sea of Cortez itineraries. For northern and central routes, liveaboards depart from Puerto Penasco, which is an easy shuttle ride from Phoenix, Arizona.

There are several dive resorts in the Sea of Cortez along with a few liveaboard options. Divers will find most of the dive resorts in La Paz, which is easy to reach. Mexico Travel Adventure offers guided diving and snorkeling trips from La Paz, with access to highlights such as Los Islotes, El Bajo, and seasonal whale shark encounters. Cabo Pulmo offers limited options and is also easily reached. Beyond that, divers can explore options at Loreto.

Liveaboards like the Rocio del Mar, the Quino el Guardian, and the Nautilus Gallant Lady provide extended range and offer different itineraries depending on the time of year and marine life seasons - a great way to experience the Sea of Cortez. For those wants to experience Loreto, the small and locally-owned Loreto Sea and Land Tours offers guests some of the best day tours.

The Sea of Cortez can be dived most of the year, but conditions and wildlife change a lot by season. In general, July to November brings the warmest water and best visibility (often up to ~25 m / 80 ft), while winter and early spring are cooler, with slightly reduced vis but excellent chances of whales and mobulas.

For La Paz and the southern Sea of Cortez we particularly like October–November: warm water, good visibility and prime whale shark season. Juvenile whale sharks usually feed in Bahía de La Paz between roughly October and April, and the bay is only opened to snorkellers once a minimum number of sharks have arrived – expect lower visibility there because you’re in plankton‑rich water by design. Whale sharks are also found near Bahía de los Ángeles in July–August, sometimes accessible on liveaboard itineraries.

From roughly December to March you can see humpback whales (surface‑only – you’re not allowed to enter the water with them) and mobula rays, but the water is cooler and visibility is often lower than in late summer and autumn. Sea temperatures range from about 18–19 °C / 65 °F in winter to 30 °C / 86 °F in late summer, and winter can be windy. Topside it gets very hot in summer, but it’s a dry heat and the Sea of Cortez is never far away for a swim. If you’re visiting La Paz for the sea lions at Los Islotes, note that the colony is closed for mating season from 1 June to 31 August each year.

Topside & Non-Diving Activities

Sea of Cortez dive resorts offer activities like fishing, kayaking, snorkelling, sandy beaches, dining and lounging by the pool. Keep in mind that swimming with whale sharks is limited to snorkels and no tanks, so it's a great opportunity to bring non-divers on an ocean adventure.

Non-diving activities on liveaboards are limited to snorkelling and enjoying the sun decks, plus whale watching!

Is the Sea of Cortez suitable for beginners?

Yes. Areas such as La Paz and many inshore reefs offer sheltered, shallow sites that work well for newer divers, and sea lion colonies are often dived in easy conditions. Some seamounts and deeper, current‑exposed sites (for example, El Bajo or Las Ánimas) are better suited to intermediate and advanced divers.

Do I need to join a liveaboard, or can I dive from a resort?

You can do both. Resort‑based diving from La Paz, Cabo Pulmo, Cabo San Lucas and Loreto is ideal for shorter trips or a mix of diving and topside time. Liveaboards are best if you want to reach the more remote northern Sea of Cortez, visit multiple regions in one itinerary, or maximise time in the water.

When is the best time to see whale sharks and mobula rays?

Near La Paz, whale shark encounters in Bahía de La Paz are usually possible once local authorities open the season, often between October and April, with peak months in late autumn. Mobula rays can be seen in different parts of the Sea of Cortez, often in late winter and spring and again later in the year, depending on the route – exact timing varies by operator and year.

How warm is the water, and what wetsuit do I need?

Water temperatures range from roughly 20–29 °C / 68–84 °F. In warmer months many divers are comfortable in a 3 mm full suit, but in winter and early spring a 5 mm and possibly a hooded vest are wise for repetitive dives, especially on deeper or windier days.

Can non‑divers enjoy a Sea of Cortez trip?

Yes. Many resorts offer snorkelling (including whale shark trips when in season), kayaking, beaches and whale‑watching at the right time of year. On liveaboards, non‑divers can usually join snorkels with sea lions and whale sharks (where permitted), explore islands when landings are allowed and enjoy the scenery from the sun deck.

• Currency: Mexican Peso (MXN)
• Language: Spanish is the official language in Mexico but most people today learn English as a second language
• Time Zone: UTC-7
• Electricity: 127 V 60 Hz