San Blas, Nayarit: Mexico's Sleepy Colonial Port

San Blas sits 62 kilometers northwest of Tepic on Mexico's Pacific coast, a fishing town of roughly 10,000 people that once ranked as the busiest Spanish port on the entire Pacific. Buses from Tepic reach it in about 50 minutes for around 108 pesos, running roughly 70 times a day. What brings travelers now is a strange and appealing mix: a 200-hectare mangrove estuary crawling with crocodiles, an 18th-century hilltop fort, empty beaches, and one of Mexico's best birdwatching corridors.

This is not Sayulita. There is no boutique hotel strip, no sunset yoga on the sand, and the surf breaks are better suited to patient longboarders than to beginners. The town's plaza still fills with families at dusk, and the fish arrives at the dock the same morning you eat it. If you want a Pacific beach town that hasn't been redesigned around visitors, San Blas rewards the detour. Come for two nights, bring strong insect repellent, and expect the heat to dictate your schedule.

Getting to San Blas and Getting Around

Almost every route passes through Tepic. That single fact simplifies planning enormously.

From Tepic, Puerto Vallarta and Guadalajara

From Tepic, take Highway 15 north for about 24 kilometers, then turn west onto the state road toward San Blas — the drive takes roughly an hour. From Puerto Vallarta, it's around 160 kilometers and three to three and a half hours via Highway 200 north to Tepic, then the coastal road; buses make the run about seven times daily for roughly 464 pesos. Guadalajara is about three and a half hours by toll highway to Tepic. From Mazatlán, allow four hours.

The bus station sits beside the main plaza, which means you can step off the bus and be within walking distance of most of the town's restaurants and hotels. Buses to and from Tepic run hourly and are cheap enough that renting a car is only worth it if you plan to explore the coast south toward Santa Cruz de Miramar.

The Nearest Airports

Tepic's small airport is closest, about 69 kilometers away, but it handles very few flights. In practice, most international visitors fly into Puerto Vallarta and take a bus or drive, or fly into Guadalajara for a wider choice of schedules. Puerto Vallarta's bus terminal sits less than 5 kilometers north of its airport, so the transfer is straightforward.

On Foot and by Local Bus

San Blas is compact. The beach, the plaza, the market and the boat dock for the mangrove tours are all reachable on foot, though the walk to Playa Hermosa in midday heat is punishing. Local buses connect the town with nearby coastal villages and the beaches to the south. If you're based in town without a car, you can cover the essentials comfortably in two days.

What to See and Do

La Tovara: The Mangrove Boat Trip

This is the reason most people come. La Tovara is a freshwater spring feeding a mangrove canal system, and the boat trip through it takes two to three hours round trip. Shared boats cost roughly 250 to 300 pesos per person; a private boat for up to eight people runs about 2,000 pesos. Short tours to the spring alone run 150 to 200 pesos, while the full loop including the crocodile sanctuary costs 200 to 350 pesos.

You will see crocodiles — many of them, of varying sizes, sunning on the banks. You'll also pass herons, turtles, and if you're lucky, a kingfisher. The turnaround point is a clear spring pool where you can swim; the water is cool and startlingly transparent compared to the tea-colored canal. Cash is required at the sanctuary entrance, about 100 pesos, and the guided visit there takes roughly an hour.

Go early. Boats leave from the dock near the bridge, and by 11 a.m. the heat and the groups arrive together. A 7 or 8 a.m. departure gives you quieter water and far more wildlife.

Fuerte de San Basilio and La Contaduría

The ruined fort sits on a hill above town, built in the 18th century when San Blas was the departure point for Spanish expeditions to California. Entry to La Contaduría, the colonial customs house, costs about 50 pesos, and historic sites generally operate from 9 a.m. to 5 p.m. The views over the estuary and the rooftops are the real payoff. It's a 15-minute uphill walk from the plaza; go before 10 a.m. or after 4 p.m. to avoid the worst sun.

Beaches South of Town

Playa Hermosa, Playa El Rey and Playa del Borrego line the coast a few kilometers south. These are broad, dark-sand beaches with soft waves and, on weekdays, very few people. Playa Hermosa has the most infrastructure — a handful of palapa restaurants serving pescado zarandeado, the regional grilled fish basted in a chili and vinegar marinade. Order it whole and share it. Borrego tends to be quieter, and the surf there is a reasonable longboard wave when the swell cooperates.

Birdwatching and Isla Isabel

The surrounding wetlands, estuaries and forest make this one of Mexico's top birding destinations, with hundreds of species recorded. Migratory birds arrive with the dry season, roughly November through April, and the town hosts a festival for migratory birds each winter. Boat trips to Isla Isabel, a volcanic island often called Mexico's Galápagos, run 1,800 to 2,200 pesos per person including snorkel gear, food and guide — a full day, and weather-dependent.

Whale Watching and Turtle Releases

Whale watching trips run about 800 to 1,000 pesos per person for roughly three hours, typically departing early morning. Sea turtle releases happen from June through February and ask only for a donation of 50 to 100 pesos. Both are worth asking about at your hotel rather than booking far ahead; operators fill boats based on conditions.

When to Go, What to Pack, and What to Watch Out For

Seasons and Weather

November through April is the dry season and the best window: sunny days, cooler evenings, calm seas and migratory birds in the mangroves. December through February are the most comfortable months, with highs around 27 to 29°C. March through May is the driest stretch but the heat climbs fast — April and May highs reach 35°C and above.

May and June bring intense heat with few visitors and low prices, and June through October is the rainy season, with August the wettest month by far at around 394 millimeters. Summer afternoons deliver hard downpours and high humidity. If you come in the wet months, plan boat trips and fort visits for the morning and keep the afternoon free.

Semana Santa and the last week of December are the visitor peaks. Hotel rates rise and the beaches fill with Mexican families — lively, but book ahead.

The Jejenes Problem

San Blas has a biting gnat problem that most guidebooks understate. These tiny insects, called jejenes locally, are worst at dawn, dusk, and on the beach. They are most active around the full and new moon and the day after. Pack repellent with at least 30 percent DEET, long light trousers, a long-sleeved cotton shirt, and hydrocortisone cream in case you get bitten anyway. Some long-term visitors swear by a locally sold product instead of DEET for these particular bites. This is not a reason to skip San Blas, but it is a reason to pack differently than you would for Puerto Vallarta.

Money, Safety and Practicalities

There are ATMs in the center, but they sometimes run dry on weekends — pull enough cash in Tepic to cover two or three days. Many beach palapas and small businesses are cash-only, while formal hotels and restaurants accept cards. Bring pesos rather than relying on card acceptance.

Petty crime exists, as in any Mexican town of this size; common-sense precautions apply, particularly after dark. Do your road transfers in daylight. Walking around the plaza and central streets in the evening is normal and generally fine.

The harbor is shallow with a bar crossing that can be hazardous in swell, which matters if you're arriving by sailboat — check current conditions in Puerto Vallarta or La Cruz before attempting entry, and be prepared to wait for flat water.

Frequently Asked Questions

How many days do I need in San Blas?

Two nights covers the essentials: one morning for La Tovara and the crocodile sanctuary, one afternoon for the fort and a beach, plus a fish dinner. Three nights lets you add Isla Isabel or a serious birding morning. Most visitors treat San Blas as a stop on a longer Nayarit coast trip rather than a standalone destination.

Do I need to book the La Tovara boat tour in advance?

No. Boats leave from the dock near the bridge and you can turn up and negotiate on the spot, which is how nearly everyone does it. Shared boats cost about 250 to 300 pesos per person. Arriving before 8 a.m. matters far more than booking ahead, since early departures get calmer water and better wildlife sightings.

Is San Blas safe for travelers?

It's a working fishing town with ordinary petty crime rather than anything specific to tourists. Keep cash amounts modest, don't wander dark outskirts at night, and drive between towns in daylight. The more common annoyance is the jejenes bites, not crime.

What is the best month to visit San Blas?

December through February offers the best balance — highs near 27 to 29°C, dry days, calm seas and peak migratory bird activity in the mangroves. If you want the emptiest beaches and don't mind 35°C afternoons, aim for late April or May. Avoid August unless you like 394 millimeters of rain.

How do I get to San Blas from Puerto Vallarta?

Take a bus from Puerto Vallarta's terminal, which is under 5 kilometers from the airport. Roughly seven departures run daily, the trip takes about three to three and a half hours, and fares average around 464 pesos. Nearly all routes transfer or pass through Tepic.