MAZATLAN · OCTOBER · SINALOA, MEXICO
October is when Mazatlan’s summer rain lets go. The month averages 3.39 inches of precipitation over 4.2 rain days, against 8.35 inches and 12.4 days in September. Meanwhile the Pacific holds at 87.7°F and afternoons still reach 90.3°F. It is warm-water beach weather with far fewer wet days, and the sun is down by 5:40 p.m.
Before you price a vacation here, read the U.S. State Department’s Mexico travel advisory, which rates Sinaloa Level 4, ‘Do not travel’. We can’t weigh that for you, and we won’t skip it. The normals below are real and the sights are lovely, but whether to go is your call, best made with the current advisory text open.
THE MONTH AT A GLANCE · MAZATLAN IN OCTOBER
October brings 90.3°F afternoons, 87.7°F water and 4.2 rain days, far drier than September’s 12.4, but Sinaloa carries a Level 4 State Department advisory that you should read before you book.
OCTOBER NORMALS: 90.3°F / 74.3°F · 3.39 IN OF RAIN · SEA 87.7°F · CHECK THE LEVEL 4 ADVISORY
Go for: swimming in 87.7°F water, a month with about a third of September’s rain days, and an old town you can walk in the cooler first hours of the day.
Think twice before: booking without reading the State Department’s Level 4 advisory for Sinaloa, or if 90.3°F afternoons with 74.3°F nights will wear you down.
Climate: SMN (CONAGUA) station 25062 · Sea: Open-Meteo Marine · Advisory: U.S. Department of State · full sources below
On this page
- Mazatlan weather in OctoberHighs of 90.3°F, lows of 74.3°F and 3.39 inches of rain
- Can you swim in Mazatlan in October?Sea at 87.7°F, measured as daily maxima
- Mazatlan hotel prices and lodging tax in OctoberSinaloa’s 3% lodging tax and what we could not verify
- Things to do in Mazatlan in OctoberEl Faro, the Malecon, Isla de la Piedra and the three islands
- Mazatlan itinerary for OctoberTwo days built around a 5:40 p.m. sunset
- Mazatlan in October vs September and NovemberRain days at 12.4, 4.2 and 2.0
- Is October a good time to visit Mazatlan?The verdict, with the Level 4 advisory
Mazatlan is one stop on a longer map. Our month-by-month destination picks show where else October works, and the destinations index covers the rest. Airfare is a separate search on the airline sites, and our travel basics guide covers general booking habits.
Mazatlan weather in October
| Measure | October in Mazatlan | Where it comes from |
|---|---|---|
| Average high | 90.3°F | SMN normals 1981-2010, station 25062 |
| Average low | 74.3°F | SMN normals 1981-2010, station 25062 |
| Precipitation | 3.39 inches | SMN normals 1981-2010, station 25062 |
| Days of measurable rain | 4.2 | SMN’s own count |
| Sea surface (mean of daily maxima) | 87.7°F | Open-Meteo Marine API, 2015-2024 |
| Daylight on October 15 | 11 hours 39 minutes | sunrise-sunset.org |
Every air figure here comes from the 1981-2010 normals of Mexico’s national weather service (SMN, part of CONAGUA), station 25062, the Mazatlan observatory in the historic center. October averages a high of 90.3°F, a low of 74.3°F and 3.39 inches of precipitation. That is a station thermometer, not a grid-cell model. The Zona Dorada hotel strip and Cerritos beach, a few miles north, are not measured separately, so treat their weather as a close neighbor of these numbers.
SMN counts 4.2 days of measurable rain in an average October, though its sheet does not publish the threshold. That is roughly one day in seven, and about a third of September’s 12.4. Most of the 3.39 inches falls on those few days. On a wet one, move the lighthouse climb and the boat trip to another morning and spend the rain hours in the historic center.
The average high and low sit 16.0 degrees apart, so a night at 74.3°F still feels like summer. Pack breathable clothes, sandals, sun protection and one thin layer for air-conditioned restaurants, plus a compact rain jacket for the wet days.
On October 15 the sun rises at 6:01 a.m. and sets at 5:40 p.m. local time, for 11 hours 39 minutes of daylight (sunrise-sunset.org, converted from UTC). Dusk arrives before dinner, so the sunset walk belongs at the end of the afternoon, not after the meal.
Can you swim in Mazatlan in October? Sea temperature
The sea surface off Mazatlan averages 87.7°F in October, per the Open-Meteo Marine API over 2015-2024. That figure is a mean of daily maxima, so it runs a shade warmer than a 24-hour average, and tables that average the whole day may read lower. It is a reading offshore, not a thermometer at a particular beach.
Yes, you can swim, and comfortably. The water sits 2.6 degrees below the average afternoon air of 90.3°F, so it refreshes more than it shocks, and no wetsuit is needed. The hotel-strip beaches, Zona Dorada and Cerritos, are the main places to try it.
We found no verified wind, swell or current data for October, so we give none. Check the local surf and flag conditions the day you go, and ask your hotel desk before swimming at a beach without lifeguards.
How busy is Mazatlan in October? Crowds and prices
We found no occupancy series and no hotel-rate data for Mazatlan, so we cannot rank October against other months for crowds or price. The weather around it does change fast: 12.4 rain days in September, 4.2 in October, 2.0 in November. Whether rates follow that slope is a question for the hotels’ own calendars.
We have no verified booking lead time either, so we quote none. Pick a rate with free cancellation, because a change in the Sinaloa advisory would move your plans more than any rain. Check the cancellation terms before you pay a deposit.
Sinaloa’s lodging tax (Impuesto Sobre Hospedaje) is 3% under Article 27 of the state’s Ley de Hacienda, and it was confirmed unchanged for 2026. We could not verify whether a hotel folds it into the quoted nightly rate or adds it at checkout, so read the final total before you confirm.
In our judgment, the one line where paying more changes the month is a reliably air-conditioned room. Nights that stay at 74.3°F after a 90.3°F afternoon make sleep the thing to protect, and an ocean view matters less.
Things to do in Mazatlan in October
October suits beach and boat days: the sea is 87.7°F, and September’s 12.4 rain days are behind you. It also comes before November’s water drops to 80.6°F (Open-Meteo Marine API). Humpback whales are seen off the coast in winter, with whale-watching boats leaving the marina. We found no verified start date, so do not count on them for October.
El Faro stands on Cerro del Creston, 157 meters above sea level. The historic center below it is federally protected by a decree published March 12, 2001, and the Angela Peralta Theater sits inside that zone. The Malecon, the oceanfront promenade, links the old town to the Zona Dorada hotel strip.
Isla de la Piedra is a beach across the harbor entrance, reached by small pangas from a pier near El Faro, a few minutes each way. Farther out, Venados, Pajaros and Lobos form a federally protected natural area reachable only by boat. October’s calm skies help these crossings, and afternoon heat of 90.3°F makes a morning departure the better choice. We could not confirm the pangas fare, since informal sources disagreed.
We could not verify admission or visiting hours for the theater or the lighthouse climb, so we quote none. Ask locally before you go. Zona Dorada and Cerritos are the main hotel-strip beaches, so they are the easy default for a swim.
Mazatlan itinerary for October
Start the old-town day with the climb to El Faro soon after the 6:01 a.m. sunrise, while the air is nearer the 74.3°F overnight low than the 90.3°F afternoon high. Come down into the historic center for the late morning and see the exterior of the Angela Peralta Theater. Spend the hottest hours indoors over a long lunch. Then walk the Malecon toward Zona Dorada as the light softens, and be on the seawall for the 5:40 p.m. sunset.
Give the second day to the water. Take a panga from the pier near El Faro across to Isla de la Piedra, then settle into 87.7°F water for the rest of the morning. If the sky turns during the 4.2 rain days, hold the boat for the next clear morning and keep the wet hours for the historic center. Ask any operator running the Venados, Pajaros and Lobos trip whether it allows landing, since we could not verify that.
Mazatlan in October vs September and November
| Measure | September | October | November |
|---|---|---|---|
| Average high | 91.6°F | 90.3°F | 85.6°F |
| Average low | 77.2°F | 74.3°F | 66.6°F |
| Precipitation | 8.35 inches | 3.39 inches | 1.70 inches |
| Days of measurable rain | 12.4 | 4.2 | 2.0 |
| Sea surface (Open-Meteo Marine API, mean of daily maxima) | 89.2°F | 87.7°F | 80.6°F |
The three months share one station and one 1981-2010 period for air. The average high slips from 91.6°F to 90.3°F, then falls 4.7 degrees more into November. Lows drop faster, from 77.2°F through 74.3°F to 66.6°F. Rain thins from 8.35 inches to 3.39 to 1.70. The sea, from the marine API instead, goes 89.2°F, 87.7°F, then 80.6°F.
Waiting for November buys 2.0 rain days and lows that drop 7.7 degrees, but the sea gives up 7.1 degrees. Going in September keeps water 1.5 degrees warmer and adds 8.2 more rain days than November’s 2.0 minus… no, simply 12.4 in all. We have no rate data for any of the three months, so price does not enter this comparison.
Is October a good time to visit Mazatlan?
Yes, if you want swimming weather and can live with 90.3°F afternoons. Only 4.2 rain days and 87.7°F water make October easy for the beach, the lighthouse climb and the pangas. No, if the Level 4 advisory for Sinaloa settles the question for you, which is a fair place to land. Weigh it with the current text at travel.state.gov.
If heat is your objection, look at November: highs of 85.6°F, lows of 66.6°F and 2.0 rain days. The sea cools to 80.6°F, still warm enough for many swimmers. If warm water outranks everything, September’s 89.2°F sea comes with 12.4 rain days.
Between its two neighbors, October pairs 87.7°F water with 4.2 rain days. September has the warmer sea but far more rain, and November has less rain but a cooler sea.
The last word
Read the State Department’s Sinaloa advisory the week you leave and again the day before, and choose a room you can cancel. Land at General Rafael Buelna International Airport (MZT), operated by OMA and southeast of downtown, with the swimsuit in your carry-on. The sea will be 87.7°F, and your first sunset on the Malecon comes at 5:40 p.m.
Sources & data for this guide
- October, September and November air normals · Servicio Meteorologico Nacional (CONAGUA), normales climatologicas 1981-2010, station 25062 Mazatlan (Obs) · checked Sep 30, 2026
- Sea surface temperature, mean of daily maxima, 2015-2024 · Open-Meteo Marine API · checked Sep 30, 2026
- Sunrise, sunset and daylight on October 15 · sunrise-sunset.org, converted from UTC to local time · checked Sep 30, 2026
- Lodging tax · Camara de Diputados, Gaceta Parlamentaria (Feb 13, 2024), citing Article 27 of Sinaloa’s Ley de Hacienda; rate confirmed unchanged for 2026 by El Contribuyente and J.A. del Rio · checked Sep 30, 2026
- Travel advisory · U.S. Department of State, Mexico Travel Advisory · checked Sep 30, 2026
- Historic zone decree of March 12, 2001 and Angela Peralta Theater · INAH, Catalogo Nacional de Monumentos Historicos Inmuebles · checked Sep 30, 2026
- El Faro height · Ayuntamiento de Mazatlan municipal tourism portal, read from search-result text · checked Sep 30, 2026
- Islands protected area · SEMARNAT; we could not find the decree date, and a UNESCO designation sometimes cited by secondary sources could not be confirmed, so we omit both
- Airport · OMA (oma.aero/mazatlan) · checked Sep 30, 2026
- Not verified: pangas fares, admission and visiting hours, occupancy, hotel rates, wind and swell, whale-watching start dates. Check operators when you book.