La Paz in September (2026): Sea Lions Return, Weather & Travel Tips

⭐ Best September window: late September, as the sea lions return and the first hint of the season turning appears, on a clear-forecast stretch. The water is at its warmest and prices at their lowest, so September rewards flexible travellers who plan around the weather.

La Paz in September is the bottom of the low season: the warmest water, the lowest prices, the emptiest beaches, and the highest storm risk of the year. Whale sharks are still a month or so away, but the Espíritu Santo sea lion colony reopens around now, so the headline wildlife begins to return, often from later in the month. It is hot, humid, and the wettest, most hurricane-prone time of year, so September is for flexible, weather-tolerant travellers, who are rewarded with bargain prices and the place almost to themselves.

💰 Average September hotel prices (La Paz, mid-range 3–4 star):
Mid-range waterfront and downtown hotels: ~$85–125/night
Rough mid-range estimates; September is the cheapest month in La Paz and runs well below Cabo.

So who is September for? We'd lean toward September for budget travellers and flexible warm-water adventurers who can roll with the weather and want the place to themselves at the year's lowest prices. We'd book late September if you want a shot at the returning sea lions with the season just starting to turn. We'd steer you away if you want reliable weather, whale sharks (still a month off), or comfortable temperatures, in which case the dry winter and shoulder months are far better. Most people don't realize September is statistically the wettest, highest-risk month here; it is also the cheapest, and the two facts are connected.

Is September a good time to visit La Paz? In short, only for flexible, budget warm-water travellers: the water is at its warmest, the sea lions are returning, and prices are the lowest of the year, but it is the hottest-feeling, wettest, most hurricane-prone month, with no whale sharks yet. Here is the quick snapshot before the detail below.

Temperature and Humidity

September is hot and humid, the muggiest, most tropical-feeling month of the La Paz year. Daytime highs sit around 34–36°C (93–97°F), and while that is a touch below the July–August extremes, the high humidity and frequent cloud build-up make it feel just as heavy. Nights are warm and sticky around 24–26°C (75–79°F). The Coromuel breezes are fading by late September as the season slowly begins to turn, but for most of the month the heat and humidity are the defining feature.

Rain Pattern

September is the wettest month of the year, averaging around four rainy days, the high point of the summer storm season. Rain typically comes as humid afternoon and evening chubascos and, more than any other month, the outer bands or remnants of tropical systems tracking up the Baja peninsula. Mornings are often clear before the build-up, so early starts matter more than ever.

Sea Temperature in La Paz in September

The sea temperature in La Paz in September is around 30°C (86°F), the warmest of the entire year. The water is genuinely bath-like, with no wetsuit needed, and on settled days it is the best reason to be here, perfect for long, easy snorkels and swims. What typically happens is that the warm sea is the refuge from the muggy land heat, so plan water time for clear mornings before storms can build later in the day.

La Paz Weather by Month: How September Compares

September sits at the hot, wet, stormy peak of the La Paz summer, with the warmest water and the lowest prices of the year. Here is how it lines up against the rest of the year across the four factors that most shape a trip.

September is the quietest and cheapest month of the year in La Paz. With the Mexican summer holidays over, the heat and humidity at their peak, and storm season at its height, both international and domestic visitor numbers bottom out, and prices follow.

• All month: very low crowds and the lowest rates of the year. Beaches are near-empty, tours run small, and availability is wide open, for those willing to brave the weather.
• Late September: the sea lion colony reopens and the first sense of the season turning appears, so late month is the most rewarding window if you want returning wildlife with the cheapest prices still in effect.
• Throughout: some smaller operators reduce schedules or take maintenance breaks in the deep low season, so confirm departures in advance.

Expect mid-range La Paz hotels to run roughly $85–125/night in September, the cheapest of the year, with budget guesthouses below and boutique waterfront properties above. La Paz is always a fraction of Cabo's rates, and this is its lowest point. Flights into Los Cabos (SJD) are at their cheapest, and La Paz is about a two-hour drive north, so book the shuttle or rental car ahead. Most guests find September a calculated trade: the warmest water and lowest prices of the year against the highest storm risk, best suited to flexible travellers with refundable bookings.

September's marine story is the turn: the sea lions come back. After the summer pupping closure, the Los Islotes colony at Isla Espíritu Santo reopens around September, so sea lion snorkeling returns, often from later in the month once operators resume island schedules. It is the first of the headline wildlife to come back, ahead of the whale sharks in late October. The water is also at its warmest of the year, so on settled days the snorkeling, diving, and the tail of the summer fishing are excellent.

The catch is the weather: September is the stormiest month, so any island or water day depends on a clear forecast. Early in the month the colony may still be ramping back up and some operators are on reduced low-season schedules, so confirm departures. Mobula rays are largely done by now, and whale sharks have not yet arrived, so the returning sea lions and the warm water are the draws, weather permitting.

La Paz Marine Life by Season

La Paz is a year-round wildlife destination, but the headline animal changes through the year. Here is what is on in September and how the calendar runs.

• Sea lion snorkel (returning): as the Los Islotes colony reopens, island trips to snorkel with the sea lions resume, often from later in September; confirm the colony is open when you book.
• Warm-water snorkeling and diving: the year's warmest water makes island coves and reefs superb on settled, clear-forecast mornings.
• Sportfishing: the summer bite for dorado, tuna, and marlin is still strong between weather systems.

For island tours and the sea lion colony, see our Isla Espíritu Santo tours guide. Whale sharks return in late October; for that season see our La Paz whale shark guide and plan an October-to-April visit.

September is the turning point of the La Paz year, so the months around it move from deep summer toward the autumn shoulder. Here is how September compares if your dates are flexible.

La Paz in September vs August

August and September are the twin peak of storm season, both hot, humid, cheap, and quiet with the warmest water. September is often the wetter and slightly higher-risk of the two, but it has one advantage: the sea lions reopen, so the headline wildlife begins to return. We'd treat them as close calls on weather, leaning to late September for the returning sea lions.

La Paz in September vs October

October is the clear turn of the season: heat and storm risk ease, the sea lions are fully back, and the whale shark season begins late in the month, while the water stays warm. September has the warmest water and the lowest prices but the worst weather and no whale sharks. We'd favour October for the better conditions and returning wildlife, choosing September only for the rock-bottom prices and warmest water.

La Paz in September vs November

November is a different trip entirely: warm, dry, comfortable weather, the whale shark season ramping up, and the sea lions open, all at shoulder-season prices. September is hot, humid, stormy, and cheap, with no whale sharks. We'd clearly favour November for conditions and wildlife, and September only for the lowest possible prices and an empty city.

So when is hurricane season in La Paz? The storm and hurricane season runs June through November and peaks in August and September, with September typically the wettest and highest-risk month. Direct hits remain uncommon, but September demands flexible plans and a close eye on the forecast.

September concentrates the year's weather risk into one month, while offering its warmest water and lowest prices in return. Two things shape a September trip, and both demand flexibility.

Peak Hurricane and Storm Season

September is statistically the wettest and most hurricane-prone month in La Paz. Most days are still fine and a direct hit is uncommon, but afternoon storms are frequent and the chance of a passing or remnant tropical system is at its yearly highest. The fix is to plan for disruption: book fully refundable tours and hotels, schedule water activities for clear mornings, keep buffer days, watch the forecast daily, and seriously consider travel insurance. Some smaller operators also run reduced low-season schedules, so confirm departures ahead.

Heat and Humidity (and the Upside)

September is hot and the most humid month, with muggy days and warm nights. The familiar summer rhythm applies: water and active tours in the morning, shade and air-conditioning midday, town in the evening. The upside is substantial: the warmest water of the year, the returning sea lions, the lowest prices, and the emptiest beaches. For travellers who can stay flexible, September offers warm-water La Paz at a fraction of high-season cost, with the wildlife just beginning to return.

If that trade does not appeal, October onward eases quickly: less heat, far lower storm risk, the sea lions fully back, and the whale sharks returning late October.

There is no shortage of things to do in La Paz in September: the warmest water of the year drives the snorkeling and diving, the summer fishing holds, and the sea lions begin to return, all best planned around clear-forecast mornings. Here is how the main activities rate this month.

What we'd prioritise in September

Watch the forecast and grab the clear mornings: September is for warm-water days between systems. We'd give the edge to scuba diving and snorkeling in the year's warmest water, the returning Isla Espíritu Santo sea lion trips later in the month, and sportfishing while the summer bite holds. Keep afternoons flexible for storms, and use the evenings for a La Paz food tour. For the complete menu, see our guide to the best things to do in La Paz.

Beyond the headliners, a few experiences round out a September trip especially well:

• Late-September sea lion snorkel: as the Los Islotes colony reopens, an island trip to swim with the returning sea lions is the most rewarding wildlife outing of the month; confirm the colony is open when you book.
• Clear-morning scuba day: the warmest water of the year and lively reefs make a settled September morning excellent, and the cheapest of the year, for diving.
• Sunrise fishing charter: the summer bite holds between systems, and an early start beats both the heat and the afternoon storms.
• Evening food and malecón crawl: with midday hot and stormy, the evenings are the time for the waterfront, dinner, and a guided food tour.
• Day trip to Todos Santos: the breezy Pacific pueblo mágico is cooler and less humid than La Paz on a muggy September day, with galleries, surf beaches, and a relaxed afternoon.

• Book everything refundable. September is the peak of storm season, so favour fully refundable tours and hotels and keep your plans flexible around the forecast.
• Grab the clear mornings. Storms build through the day, so schedule fishing, diving, and snorkeling early and watch the daily forecast closely.
• Aim late in the month for sea lions. The Los Islotes colony reopens around September, with tours most reliable later in the month; confirm the colony is open before booking.
• Plan for heat, humidity, and a cool base. A hotel with a pool and strong air-conditioning matters most in the muggiest month; hydrate and protect against the sun.
• Confirm operator schedules. Some smaller operators run reduced schedules or take breaks in the deep low season, so check departures in advance.
• Travel for value and consider insurance. September has the lowest prices of the year, but with hurricane risk at its peak, cover for delays and cancellations is worth it.
• Skip whale sharks this month. They return late October; if they are the goal, plan an October-to-April trip instead.
• Visiting at a different time of year? October turns the corner fast, with easing weather, the sea lions fully back, and the whale shark season starting: see our La Paz in October guide and our La Paz whale shark guide.