In October, La Fortuna wakes to a hush of mist sliding down the flanks of Arenal, with the cone often hidden until the cloud lifts for a few minutes and shows its perfect slope. Roosters, delivery trucks and the drip of wet leaves fill the streets around the central park. This is a lush, quiet stretch of the rainy season, a month for steaming thermal pools, rainforest walks and slow lunches under a tin roof while the afternoon downpour drums overhead.
What is the weather like in La Fortuna in October?
October in La Fortuna is warm, humid and very wet, with rain on almost every day of the month, though not all day long.
| Month | Average high (°F) | Average low (°F) | Rain days |
|---|---|---|---|
| September | 81.0 | 70.2 | 25.8 |
| October | 79.9 | 70.1 | 26.0 |
| November | 77.9 | 69.2 | 22.2 |
Most days, the morning hours tend to be the finest stretch. The air is soft and damp, the forest is loud with birds, and there are decent odds of a clear window on the volcano before the clouds build. If you want a walk, a hanging bridge or a waterfall visit, start early and be done by lunch.
In the afternoon, rain often shows up, at times as a heavy shower that clears within an hour, at other times as a gray, steady drizzle that lingers into the evening. Now and then during October, a downpour soaks everything, leaving the paths and streets slick with mud. Daylight lasts nearly twelve hours, so you still get a full day, but dusk falls early and the light is often flat and silvery rather than golden.
You can wear a T-shirt in the evening since it stays mild, but once the wind rises off the lake, an extra light layer comes in handy. Nothing here is cold, and that is exactly why the hot springs feel so good after a wet day: the air is warm and the water warmer still. Treat any view of Arenal as a bonus rather than a promise.
What to do in La Fortuna in October
October has no big local festival in La Fortuna itself. The calendar mark is October 12, the Day of the Cultures, and on the Caribbean coast Limon holds its Carnival around that date, with parades, music and Afro-Caribbean food. Dates can shift from year to year, and Limon is a long way from the volcano, so for most visitors the month is about the landscape: green, dripping and loud with life.
The rainy season suits the activities where getting wet is part of the fun. Waterfalls run full, rivers are lively, and the forest feels like the textbook picture of a rainforest. It is also the month when the town settles down, so tables at the local sodas are easy to find and trails feel less crowded.
Arenal’s trails and old lava flows
From 1968 onward, this classic cone erupted with few breaks, yet it has stayed still since 2010. Visitors now come for the view and for walks over old lava flows, where the forest has slowly reclaimed black rock and you cross it on well-worn paths. The park is a short drive from town, and a morning visit gives you the best chance of seeing the summit.
In October the summit is often wrapped in cloud, so go for the walk itself: howler monkeys in the canopy, toucans and oropendolas, the roar of the wind in the trees. A guided walk is the usual way to spot animals, since most of them are well hidden. Wear shoes with grip, because the ground is slick after the afternoon rain, and keep a poncho in your daypack.
Hot springs after a rainy afternoon
The thermal pools around La Fortuna are the classic answer to a wet day. Warm river-fed pools step down through gardens of heliconia and ferns, with swim-up bars at the bigger resorts and quieter, simpler pools at smaller places. Steam rising into cool rain is the image of the month.
Late afternoon and evening are the favorite hours, when the day trippers leave and the lights come on along the paths. Hot-spring options range from simple pools to full resorts with dinner, so choose by mood: a quiet soak, or a lively evening with a cocktail. Bring flip-flops and a quick-dry towel.
Waterfall, hanging bridges and the lake
The La Fortuna Waterfall drops into a deep green basin after a long staircase through the forest, and in October it is at full strength, with mist hanging over the pool. Go in the morning, when the light is better and the stairs are drier. The climb back up is the workout of the day.
Hanging bridges and canopy walkways are a good way to watch birdlife, but bring rain protection. Lake Arenal, a short drive away, is a different mood: windy, open, with kayaking and boat rides when the clouds allow. Treat the volcano reflected in the water as a happy accident.
Food is the other pleasure of a rainy evening. Seek out casado, the dish of rice, beans, plantain, salad and a protein that holds down every soda menu, plus gallo pinto, the rice and beans blended with spices, in the morning. Fresh fruit juices, strong local coffee and a bowl of hot soup suit the damp weather, and a chocolate or coffee stop on a farm tour is an easy way to spend a wet morning.
A two-day itinerary for La Fortuna in October
Day 1 is for the volcano and the water. Visit the Arenal trails in the morning, and if you hope to see animals, explore the lava flows alongside a guide. Return to town afterward for a late bite at a soda, where a casado and a fruit juice make an easy meal on a rainy day.
By mid-afternoon the showers usually arrive, which is your cue for the hot springs. Spend the late afternoon and early evening in the pools, then eat dinner at the springs or in a restaurant near the central park. With sunrise early and dusk falling around the six o’clock hour, you will be heading back in the dark, so plan your ride.
Day 2 starts with the waterfall while the stairs are still dry and the pool is quiet. Allow the morning for the climb down, a look at the basin and the climb back. Then head to the hanging bridges, where the canopy is busiest with birds in the cooler hours.
Lunch can be a roadside spot or a farm that serves local dishes, and the afternoon is for the lake or a coffee and chocolate tour under cover. If the weather turns, switch to the indoor cards: a cooking class, a farm visit, a long café stop or a museum-style stop in town. End with a slow dinner and an early night.
Is La Fortuna busy in October?
No, October ranks among the calmer months in La Fortuna, because it falls in the green season and the big holiday weeks land elsewhere on the calendar.
The visitors you see are mostly independent travelers, couples and families on flexible schedules, along with Costa Ricans around the October 12 weekend. Hot springs and the waterfall still have their tour-bus hours at midday, so early and late slots feel calmer. You seldom have to book a table at restaurants, and compared with the dry months, lodging is simpler to secure, offering a wider range of lodges and small hotels.
As a habit, book early for the busy holiday weeks of the year and later for quiet months like this one. Still, the places you most want, such as a small lodge with a view or a dinner at a popular hot spring, are worth booking ahead.
Rental cars are easy to get, though the roads are slick and slow in the rain, so allow extra time. For parks and trails, check the official page of the park before you go, since rules and access can change.
What to pack for La Fortuna in October
Pack for warm rain and mud, and plan to dry things out each night. A small daypack with waterproof liners is worth more than any single item.
- Pack a lightweight rain jacket or poncho, since afternoon showers happen almost every day.
- Shoes with grip for muddy trails and wet waterfall stairs.
- Quick-dry clothes, since nothing dries in the humid air.
- For the hot springs, bring a swimsuit plus a quick-dry towel.
- Sunscreen and insect repellent for the forest walks.
- A dry bag for phones and cameras.
Good to know before you go
The U.S. State Department rates Costa Rica Level 2, ‘Exercise increased caution,’ due to crime; it says petty crime is common throughout Costa Rica and that violent crime also affects tourists, including armed robbery, homicide and sexual assault.
October falls within the Atlantic hurricane season, and Costa Rica’s rainy season is in full swing, so heavy rain can last for days and affect roads and plans. Build in slack, keep your most weather-sensitive outing for a morning, and keep a backup for the afternoon.
Book the hot springs and your lodging first, since they shape the rest.
La Fortuna in October vs September and November
September feels much like October: warm, wet, green and quiet, with a touch more heat in the afternoons. If you come four weeks earlier, expect the same dripping forest and the same easy rooms, and not much else changes. The main difference is a slightly warmer feel and a similar rhythm of afternoon showers.
November is a little cooler and a little less rainy, and the green is at its lushest as the season starts to ease. The trails stay muddy, but the clear windows on the volcano tend to come more often as the weeks pass. Crowds begin to build toward the dry months, so rooms start to tighten as the year turns.
If rain does not bother you and you are after the area at its quietest and greenest, pick September or October. Shift to November if you want a slightly better chance of drier hours and a little more company on the trails.
Is October a good time to visit La Fortuna?
Travelers who enjoy verdant scenery, thermal pools and peaceful paths, and who understand that rain comes with the day, will find October a fine time to visit.
It suits couples, birders, photographers of moody forests and anyone who prefers a relaxed pace. It is a poor match for travelers who need a clear view of the volcano or fixed outdoor schedules. If rain would spoil your trip, choose the dry months instead.
On arrival, book your hot spring evening and your morning walk first, then fill the rest around the weather. Keep the afternoons loose and let the showers decide when you soak. What is special about October here is the sound of it: rain on the roof, water running through the forest, and warm pools steaming in the dusk.
Sources
- Open-Meteo / ECMWF ERA5, normals 1991-2020 computed for the grid cell at 10.4679N 84.6427W, checked October 8, 2026
- sunrise-sunset.org, sunrise and sunset calculated for the 15th of the month, checked October 8, 2026
- U.S. Department of State, Costa Rica Travel Advisory, issued April 1, 2026 (https://travel.state.gov/content/travel/en/traveladvisories/traveladvisories/costa-rica-travel-advisory.html), read via the State Department open data API on October 8, 2026
To plan your stay
- Things to Do in La Fortuna: Arenal Volcano, Hot Springs, the Waterfall and Day Trips
- Where to Stay in La Fortuna: Town Center, Volcano Road, Hot Springs Strip and Lake Arenal
- La Fortuna vs Monteverde: Hot Springs, Cloud Forest, Weather and Which to Choose
- Day Trips from La Fortuna: Rio Celeste, Arenal Volcano Park, Monteverde and Hot Springs