September in Cartagena is wet. That is the single most important thing to know. Expect roughly 150mm of rainfall across 23 days, with humidity around 84% that you feel the moment you walk out of Rafael Núñez International Airport. Daytime temperatures reach about 30°C (86°F) and nights stay warm at 25°C (77°F), so the air feels heavy and tropical around the clock. The Walled City's stone streets collect water during the harder downpours, and locals in Getsemaní and San Diego barely flinch, ducking under colonial archways until it passes.
To be fair, September is not Cartagena at its worst. October brings 207mm and November 191mm, so you're catching the rainy season in a relative lull between those peaks. Hotel rates in Bocagrande and the Ciudad Amurallada drop well below the December-through-March high season, and the reduced visitor numbers mean you can walk into a table at restaurants along Calle del Arsenal on a Friday night. The trade-off is simple. You will get rained on, likely every day, usually in the afternoon. But the mornings tend to be clear enough for sightseeing, and the post-rain Caribbean sunsets through the clouds above Café del Mar can be striking.
That said, if your dates are flexible, January through March offers Cartagena at its driest and most comfortable. September is for travelers who prefer cheaper rates and emptier plazas over guaranteed sunshine. The Día del Amor y la Amistad celebration on the third Saturday of the month gives the city a festive weekend, and the anniversary of Colombia's 2016 Peace Agreement on September 26 brings commemorative events to the Centro de Convenciones where the deal was signed.
Why visit in September
- Hotel rates in Bocagrande and the Walled City drop 30-50% from the December-March peak, with 4-star properties in Centro Histórico regularly available at a fraction of high-season pricing.
- Tourist crowds thin noticeably. Sites like Castillo San Felipe de Barajas, which can draw 2,000+ visitors a day in January, are far quieter, and you'll rarely wait in line.
- The Día del Amor y la Amistad (third Saturday of September) fills Getsemaní's Plaza de la Trinidad with live champeta music and open-air dancing into the early morning.
- Tropical fruit season peaks in the markets. Mercado de Bazurto overflows with guanábana, zapote, and maracuyá at their sweetest.
Worth knowing
- Rain falls on roughly 23 of 30 days, typically in afternoon bursts of 30-90 minutes that can disrupt boat trips to Islas del Rosario and Playa Blanca, sometimes canceling departures entirely.
- Humidity at 84% makes walking the Walled City's streets genuinely uncomfortable by midday. The heat index can feel closer to 37°C (99°F) in direct sun.
- This is technically Atlantic hurricane season. Cartagena sits south of the main hurricane corridor, but tropical storms occasionally affect the region, bringing 2-3 day stretches of continuous rain.
- Some seasonal beach restaurants and day-trip operators along Playa de Bocagrande reduce hours or close entirely during low season.
Best for
Think twice if
September sits in the middle of Cartagena's second wet period, with warm and humid conditions throughout the month. Morning hours tend to be partly cloudy and manageable for outdoor activity, but by 2-3 PM most days, cloud cover builds into rain that can range from a 20-minute drizzle to a full tropical downpour lasting over an hour. Overnight temperatures stay warm at 25°C (77°F), so sleeping without air conditioning is difficult. The sea temperature at Bocagrande hovers around 29°C (84°F), warm enough that even the rain doesn't make swimming unpleasant if you're already wet.
Seasonal caution
- Atlantic hurricane season runs June through November. Cartagena is south of the typical hurricane track, but tropical depressions and storms can bring sustained multi-day rainfall and rough seas. Monitor weather forecasts from IDEAM (Colombia's meteorological agency) in the week before travel.
- The heat index often exceeds 35°C (95°F) during midday hours due to the combination of 30°C air temperature and 84% humidity. Limit extended walking between 11 AM and 3 PM, and carry water. Heat exhaustion is a genuine risk for visitors not acclimatized to tropical humidity.
Year-round climate
Averages from the last 5 years.
| Month | Avg high (°C) | Avg low (°C) | Rainfall (mm) |
|---|---|---|---|
| Jan | 32 | 24 | 17 |
| Feb | 32 | 24 | 14 |
| Mar | 33 | 25 | 22 |
| Apr | 32 | 25 | 79 |
| May | 31 | 25 | 159 |
| Jun | 30 | 25 | 202 |
| Jul | 31 | 25 | 142 |
| Aug | 30 | 25 | 171 |
| Sep | 30 | 25 | 150 |
| Oct | 29 | 25 | 207 |
| Nov | 29 | 25 | 191 |
| Dec | 31 | 25 | 35 |
Best things to do in September
Morning walking tour of the Walled City
sightseeingThe UNESCO-listed Ciudad Amurallada is best explored before the afternoon heat and rain set in. Start at the Torre del Reloj, wind through Plaza de los Coches, and reach the Palacio de la Inquisición by mid-morning while the cobblestones are still dry.
Fewer tourists mean you can photograph the balconied streets of San Diego and Santo Domingo without crowds blocking the shot. Guides have more availability for private bookings.Booking tipBook a guide through the tourism office at Plaza de la Aduana rather than accepting offers at the clock tower gate, where unlicensed operators cluster.
Castillo San Felipe de Barajas
historyThe largest Spanish colonial fortress in the Americas sits on the Cerro de San Lázaro. The tunnel system underneath stays cool regardless of weather. Allow 2 hours to explore the full network of passages and rooftop batteries with their views toward the bay.
January visits can mean 45-minute queues at the entrance. In September, you'll likely walk straight in and have sections of the tunnels to yourself.Booking tipArrive by 9 AM when the gates open. The tunnels are cool and dry even if it rains outside.
Cooking class in Getsemaní
foodSeveral culinary schools in the Getsemaní neighborhood run 3-4 hour classes covering Caribbean coast staples. You'll typically visit Mercado de Bazurto to source ingredients, then return to prepare dishes like ceviche de camarones, arroz con coco, and patacones.
Rain makes indoor activities valuable, and the market visit happens in the dry morning hours. September's fruit abundance means you'll find ingredients at peak flavor.Booking tipClasses fill up even in low season because fewer are offered. Book at least 3 days ahead.
Sunset at Café del Mar on the city walls
nightlifeThis bar sits on the 400-year-old ramparts of the old city, facing west over the Caribbean. The post-rain cloud formations in September create layered orange and purple light over the water that the clear-sky dry season rarely produces.
September's afternoon storms clear by 5-6 PM, leaving moisture in the air that scatters sunset light dramatically. The terrace is less crowded than in peak months.Booking tipArrive by 5:30 PM to get a wall-side seat. No reservations taken.
Day trip to La Boquilla mangroves
natureThe fishing village of La Boquilla, 20 minutes north of the Walled City, offers canoe tours through the mangrove channels of Ciénaga de la Virgen. Local fishermen paddle you through tunnels of roots while explaining the ecosystem. Birdlife is abundant.
The wet season fills the mangrove channels fully, making them navigable deeper into the forest. Migratory birds begin arriving in September, adding species not present in dry months.Booking tipGo through the community cooperative at La Boquilla rather than a Walled City tour agency. The money stays local and the guides know the channels better.
Islas del Rosario on a clear morning
beachThis archipelago of 27 coral islands lies 45 minutes by boat from Cartagena's marina. The water is turquoise, the snorkeling covers hard and soft coral, and the Oceanario has a small aquarium with rays and nurse sharks. Mind you, the trip depends entirely on sea conditions.
Departures are less certain in September due to afternoon weather, but mornings are often calm. If you get a clear day, you'll share the islands with far fewer boats than during high season.Booking tipBook with operators who offer flexible rescheduling. Same-day cancellations due to weather are common in September, and reputable operators will move your trip rather than sail into rough seas.
Museo Naval del Caribe
cultureHoused in a restored 17th-century Jesuit college on Calle San Juan de Dios, this museum covers Cartagena's maritime history from pre-Columbian canoes through the Spanish colonial fleet to modern naval operations. Two floors of ship models, maps, and navigation instruments.
An ideal rain-afternoon activity. The building's thick colonial walls keep it cool without heavy air conditioning, and September's low crowds mean you can spend time with the detailed cartography exhibits.Street art tour of Getsemaní
artGetsemaní's walls are covered in murals by Colombian and international artists. The neighborhood has over 150 documented pieces spanning several blocks between Calle de la Sierpe and Plaza de la Trinidad. Guided tours cover the stories and artists behind the major works.
The overcast mornings of September provide even, diffuse light that's better for photographing murals than the harsh shadows of dry-season sun. Fewer tourists in frame.Booking tipSelf-guided is perfectly fine. Start at Calle de la Sierpe and work toward the plaza.
What to eat in September
In season: fruit
Guanábana
The soursop fruit reaches peak ripeness in the wet season. Street vendors in Getsemaní blend it into cold juices that balance creamy and tart. Mercado de Bazurto sells whole fruits for a fraction of restaurant prices.
Zapote
This orange-fleshed tropical fruit, sweet and slightly grainy in texture, peaks during the wet months. Vendors at Mercado de Bazurto sell them ripe and ready. The flavor sits somewhere between sweet potato and apricot.
On menus now
Cazuela de mariscos
Cartagena's signature seafood stew, made with shrimp, squid, fish, and coconut milk. September's rougher seas tend to bring certain species closer to shore, and the warm, rainy weather makes this a natural comfort dish. Look for it at the open-air restaurants in La Boquilla.
Street food peaks
Arepa de huevo
Fried corn arepa stuffed with a whole egg. Street vendors in Getsemaní and outside Mercado de Bazurto fry them fresh to order, usually before 10 AM. The shell is crisp, the egg inside still slightly runny. A Cartagena breakfast staple that costs almost nothing.
What to drink
Limonada de coco
Coconut lemonade made with fresh lime, coconut milk, and ice. Not seasonal in the strict sense, but September's heat and humidity make it close to essential. Every restaurant in the Walled City offers a version, though the ones at Plaza de Santo Domingo tend to charge a premium for the location.
Regular events in September
Día del Amor y la AmistadFree
Colombia's equivalent of Valentine's Day, celebrated on the third Saturday of September. In Cartagena, Plaza de la Trinidad and the bars of Getsemaní host live champeta and salsa, with dancing spilling into the streets. Restaurants offer special menus for couples and friend groups.
Third Saturday of SeptemberAnniversary of the Colombian Peace AgreementFree
September 26 marks the 2016 signing ceremony at Cartagena's Centro de Convenciones. Commemorative events, panel discussions, and cultural programming take place in the convention center and surrounding plazas.
September 26Fiestas de la Independencia rehearsalsFree
Cartagena's November 11 independence celebration is one of Colombia's biggest festivals. In September, neighborhood groups begin organizing and rehearsing dance routines and float construction. You might catch informal champeta practice sessions in Getsemaní and Bazurto evenings.
Throughout SeptemberBest places this September
Ciudad Amurallada (Walled City)
neighborhoodThe UNESCO-listed old town with its colonial architecture, plazas, and churches. In September's low season, the streets feel more like a living neighborhood than a tourist attraction. Morning walks before 11 AM are comfortable.
Centro HistóricoCastillo San Felipe de Barajas
historic siteThe massive 17th-century Spanish fortress on Cerro de San Lázaro. Its underground tunnel system stays cool and dry regardless of September's weather, making it a reliable any-day activity.
San LázaroMercado de Bazurto
marketCartagena's sprawling public market, chaotic and loud, where locals buy fish, fruit, and household goods. September's fruit season makes the produce section particularly vibrant. Not a tourist market, so go with awareness.
BazurtoPlaza de la Trinidad
plazaThe social heart of Getsemaní. Locals gather here nightly, street food vendors set up along the edges, and champeta music plays from speakers. On Amor y Amistad weekend, it becomes the neighborhood's main celebration ground.
GetsemaníConvento de la Popa
historic siteA 1607 Augustinian convent perched on Cartagena's highest hill, 150 meters above sea level. The panoramic view covers the entire city, Bocagrande's skyline, and the Caribbean. Worth timing for a clear morning before clouds build.
La PopaPlaya de Bocagrande
beachThe main urban beach along Cartagena's hotel strip. In September, the sand is less packed with vendors and loungers. Sea temperature at 29°C means swimming is comfortable even during or after rain.
BocagrandeCafé del Mar
barBar on the old city walls facing the Caribbean sunset. September's post-storm skies tend to produce more dramatic color than the clear dry-season evenings. The wall itself dates to the 16th century.
Centro HistóricoLa Boquilla
villageA fishing village 20 minutes north, gateway to mangrove canoe tours and fresh ceviche at family-run beachfront restaurants. Less touristy than the Rosario Islands, and accessible regardless of sea conditions.
La Boquilla
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Insider tips
Morning hours (7-11 AM) are your window for outdoor activities. The city is cooler, drier, and the light on the colonial facades is best for photos. Plan museums and indoor restaurants for the 2-5 PM rain window.
Getsemaní locals play dominoes in Plaza de la Trinidad most evenings. Sitting nearby with a beer from one of the tiendas is more atmospheric than any rooftop bar in Bocagrande.
The lanchas (boats) to Islas del Rosario depart from the Muelle de los Pegasos around 8 AM. If the sky is clear at dawn, go. If clouds are already heavy, reschedule. Captains will depart in marginal conditions if tourists insist, but the return trip in afternoon swells is unpleasant.
Avoid taxis without meters or pre-agreed fares near the clock tower. InDriver and DiDi apps work in Cartagena and prevent the common overcharge on the Walled City to airport route.
Mercado de Bazurto is Cartagena's realest experience but it's overwhelming and petty theft happens. Go before 10 AM, leave valuables at the hotel, and consider going with a cooking-class guide on your first visit.
Avoid these mistakes
- Booking all outdoor activities for the same day. Spread boat trips and walking tours across multiple mornings so one rainy morning doesn't ruin your entire plan.
- Relying on Islas del Rosario as the trip's main highlight. September boat cancellations are common enough that you need a backup plan. The Walled City, museums, and food scene are more weather-proof.
- Wearing jeans or heavy cotton in 84% humidity. They absorb sweat, stick to skin, and take hours to dry after a downpour. Lightweight fabrics are not optional here.
- Skipping sunscreen on overcast mornings. Cloud cover at Cartagena's latitude blocks minimal UV. Sunburns on cloudy September days catch travelers off guard.
- Walking the Walled City at midday without water. The heat index above 35°C combined with cobblestone streets that radiate stored heat can cause heat exhaustion faster than expected.
Practical tips for September
Book accommodations in the Walled City or Getsemaní rather than Bocagrande if you want to minimize transit during afternoon storms. The old-town neighborhoods are walkable and have colonial archways and covered passages for shelter. Plan your most important outdoor activity for 8-11 AM each day. Restaurants in Centro Histórico and Getsemaní generally do not close for rain, but beachside spots in Bocagrande and La Boquilla might. Carry cash in smaller denominations for street food vendors and informal taxis, as card terminals are unreliable during power fluctuations that occasionally accompany heavy storms. The airport is 15 minutes from the Walled City by taxi, but allow extra time if traveling during a downpour, as some roads near the Ciénaga de la Virgen flood briefly.
FAQ
Does it rain all day in Cartagena in September?
No. September rain in Cartagena typically follows a pattern. Mornings are mostly clear or partly cloudy until around 2-3 PM, when convective storms build. Rain usually lasts 30-90 minutes, then clears by evening. Continuous all-day rain happens mainly when a tropical depression passes through, which occurs perhaps 2-3 times per month.
Can I still visit Islas del Rosario in September?
Yes, but with flexibility. Boats depart most mornings when seas are calm, but operators cancel when afternoon storm forecasts are strong. Book with companies that allow free rescheduling, and have a backup plan for days when departures are canceled. Mornings that start clear usually stay calm enough for the 45-minute crossing.
Is September a good time to visit Cartagena on a budget?
September is one of the cheapest months to visit Cartagena. Hotel rates run 30-50% below the December-March peak across all neighborhoods. Flights from Bogotá and Medellín drop similarly. The trade-off is afternoon rain and higher humidity, but the savings are significant and the city's museums, food, and architecture are unaffected by weather.
How bad is the humidity in Cartagena in September?
At 84% average humidity and 30°C air temperature, the heat index regularly feels above 35°C. It is noticeably uncomfortable for visitors from temperate climates, especially between 11 AM and 3 PM. Air conditioning in hotels and restaurants provides relief, and mornings near the sea feel more bearable due to the breeze off the Caribbean.
What should I do during afternoon rain in Cartagena?
The Palacio de la Inquisición, Museo Naval del Caribe, and Museo del Oro Zenú are all within the Walled City and make natural rain-hour visits. Cooking classes in Getsemaní run regardless of weather. Many restaurants along Calle del Arsenal and Plaza de Santo Domingo have covered terraces where watching the rain over a coffee or cocktail is part of the experience.
Things to Do in Cartagena in September
Free cancellation Cartagena 5 Island Hop Tour: Lunch, Snorkel, Beach Clubs, & More
Day trip — 7 hours, free cancellation.
via Viator
Free cancellation Tour De Palenque, Road to Emancipation.
Day trip — free cancellation.
via Viator
Free cancellation Private Walking Tour in Cartagena Walled City & Getsemaní
Day trip — free cancellation.
via Viator
Free cancellation Cartagena ATV Tour
Outdoor experience — 2.5 hours, free cancellation.
via Viator
Free cancellation Full Day Tour of 5 Must-See Places in the Rosario Islands
Outdoor experience — 7.5 hours, free cancellation.
via Viator
Free cancellation Cartagena's Rosario Islands 5-Site Boat Tour with Lunch & Snorkel
Day trip — 7 hours, free cancellation.
via ViatorLast verified by automated review (v1.7.2) on June 15, 2026. What is automated review?