La Fortuna Rainy Season vs Dry Season (2026): Which Should You Book?

⭐ Short answer: if seeing Arenal Volcano is the point of the trip, book the dry season and accept the prices. If waterfalls, wildlife, green rainforest and value matter more than a clear cone, book the green season and plan your days around the mornings. If you want both, aim for late April, May, or late November.

La Fortuna runs on two distinct calendars. The dry season covers December through April and peaks in March and April, when rainfall drops to around 70 to 75mm a month and the volcano is visible for days at a stretch. The green season runs May through November and peaks in September and October, when monthly rainfall climbs to 330 and 375mm and Arenal spends much of its time inside its own cloud cap.

The biggest difference is not the rain itself, it is the cloud. Rain in La Fortuna is survivable in any month and rarely cancels a tour. What green season really takes from you is the view of the mountain, and what it gives back is a waterfall running at full volume, a forest at its greenest, frogs and insects at their loudest, and hotel rates that can fall to half of what January charges.

We have written this page as a genuine head-to-head rather than a hedge. Each section below picks a winner, and the decision table further down gives a straight recommendation for ten different types of traveller. If you want the deep dives, our La Fortuna dry season guide and La Fortuna rainy season guide cover each half of the year in full.

Here is the full comparison in one place. Every figure below comes from La Fortuna's monthly climate averages and the local high and low season pricing rhythm.

Read down that table and a pattern emerges: dry season wins everything that depends on visibility and footing, green season wins everything that depends on water, wildlife and value. Our view is that there is no wrong answer here, only a mismatch between what a traveller wants and which season they book.

The single most useful thing to understand about La Fortuna's climate is that temperature barely moves all year, while rainfall swings roughly fivefold. Daytime highs sit between 29 and 32°C every month and nights hover around 21°C, so you pack the same clothes in January as in July. What actually changes your trip is how much rain falls, and when.

Full Month-by-Month Figures

What the Numbers Actually Mean

Three things stand out. First, March and April are the driest months by a wide margin, at roughly 70 to 75mm, which is why the dry season peaks then rather than in December. Second, October is the wettest at around 375mm, five times March, with September close behind. Third, the shoulder months do most of the work for value travelers: May and November sit between the extremes, offering greener rainforest and lower prices without the full weight of the wet season.

The temperature column is almost a flat line, and that is the point. Most people don't realize that choosing when to visit La Fortuna is a decision about rain and cloud, not about heat. If you want the volcano visible and the trails firm, come in the dry season. If you want thundering waterfalls, fuller rivers, and lower rates, the green season delivers, and you accept afternoon rain as the price.

ℹ️ Figures are rounded monthly averages from a single climate dataset and are indicative rather than exact. Published figures for La Fortuna vary noticeably between sources and weather stations, particularly for rainfall totals and rain-day counts, because the town sits on the Caribbean slope where conditions shift over short distances. Treat these as the shape of the year rather than a forecast.

Rather than list pros and cons and leave you to weigh them, here is what we'd book if we were you, matched to the kind of trip you are planning, with the reasoning attached.

If you are still torn, apply this test. Ask what would ruin the trip: not seeing the volcano, or spending double for the same hotel room. Answer honestly and the season chooses itself. In our experience the travellers who regret their timing are almost always the ones who booked green season expecting the postcard cone, not the ones who booked dry season and paid more.

This is the least ambiguous comparison on the page. Arenal's near-perfect cone is the reason most people come to La Fortuna, and it is also the single most weather-dependent sight in the region. The mountain makes its own weather: it forces moist air upward, that air condenses, and a cloud cap forms over the summit. The wetter the air, the more of the year that cap sits in place.

The timing rule holds in every month: the volcano is clearest between sunrise and mid-morning, before daytime heating builds the cloud cap, and it often clears again near sunset. What this means practically is that even in green season an early start gives you a real chance, while an 11 AM volcano tour in October is largely a walk in cloud.

Our take is simple: if the volcano is why you are coming, book dry season and give it at least two early mornings. If your dates land in green season, still book the hike, still start early, and treat a clear cone as a bonus rather than the plan. Note that Arenal has been in a resting phase since 2010, so there is no visible lava at night in any season. What you are here for is the shape of the mountain against the sky. Our Arenal Volcano hike guide compares the viewpoints and trails in detail, and March is the single strongest month for visibility.

Flip the comparison and green season takes the honours. The La Fortuna Waterfall is fed by the same rain that hides the volcano, and by September and October it is running at its most powerful of the year: louder, wider, and throwing spray far enough that you feel it well before the base. In March and April the same falls are elegant rather than overwhelming, with clearer water and a calmer plunge pool that is much better for swimming and photographs.

One warning worth flagging. Rio Celeste is the exception that breaks the green-season pattern: its famous turquoise colour depends on a fine mineral suspension that heavy rainfall can wash out entirely, so a visit after several days of downpour can be a genuine disappointment. If Rio Celeste is on your list, dry season is the safer bet. Our Rio Celeste guide and waterfall guide both cover the seasonal differences, and rafting is one of the few activities we would actively schedule for the wet months.

The financial gap between the two seasons is larger than most visitors expect. A mid-range La Fortuna hotel room that costs $90 to $130 a night in September or October can run $200 to $280 over the Christmas and New Year peak. That is not a modest premium, it is close to a doubling, and it applies to tours, transfers and restaurants to a lesser degree as well.

Two details are worth planning around. First, the green season is not uniformly quiet: July and August pick up noticeably because of northern-hemisphere family holidays, and mid-July also brings the veranillo, a short dry spell that makes those weeks better than their rainfall totals suggest. Second, Semana Santa in April is the biggest domestic travel week in Costa Rica and can make an otherwise excellent dry-season week feel as busy as Christmas.

What we consistently see is that September and October offer the strongest value in the region and the weakest weather, in almost exactly equal measure. If the budget is the binding constraint, those months genuinely work, provided you go in knowing you may never see the summit. Our October guide and September guide set out what that trip actually looks like.

The honest conclusion of every comparison above is that neither season is better, they are better at different things. Which leads to the most useful advice on this page: if your dates are flexible, we'd lean toward the seam between them rather than either extreme, because the shoulder weeks hand you most of the dry season's visibility at close to green season's prices.

Late April is the pure-value end of dry season. Rainfall bottoms out at around 70mm, the volcano is still showing itself on most mornings, and the moment Semana Santa passes the crowds and prices drop away while the weather stays intact. It is the same trip January delivers for meaningfully less money.

May is our own favourite compromise and the closest thing to having both. Rainfall roughly doubles from April to 180mm, which sounds worse than it is: the rain concentrates in afternoons, mornings stay largely workable, and volcano views remain good rather than fair. Meanwhile the rainforest greens up dramatically, the waterfall recovers real power, and rates sit at green-season levels of $100 to $150 with almost nobody around.

Late November into early December runs the same trade in reverse. Rainfall falls from October's 375mm peak to 250mm in November and 220mm in December, visibility climbs back to very good, and the forest is still carrying all the lushness of the wet months. The catch is a hard deadline: from around December 20 the Christmas peak arrives and prices jump to $200 or more, so this window closes fast.

If you only take one thing from this page, take that. The travellers who get the best La Fortuna trips are usually not the ones who booked the perfect month, they are the ones who booked the edges. Our May guide, April guide and November guide go month by month.

• Decide on the volcano first. It is the only factor where the two seasons are genuinely far apart. If a clear cone is essential, book December to April and stop optimising anything else.
• Ignore temperature completely. Highs sit at 29 to 31°C and lows at 21°C in every month of the year, so heat is not a reason to choose one season over the other. Pack identically either way.
• Do not treat dry season as rainless. Even March and April average around 70 to 75mm, and La Fortuna's Caribbean-slope position means showers are possible any day. A light rain shell belongs in every suitcase.
• Book outdoor activities for mornings in both seasons. The pattern is the same year-round: clearest early, cloudiest and wettest from mid-afternoon. Green season just makes the rule stricter.
• Use afternoons for rain-proof plans. Hot springs, coffee tours and cooking classes are unaffected by weather and are the natural back half of any day in either season.
• Watch two peak windows in dry season. December 20 to January 7 is the most expensive stretch of the year, and Semana Santa in April is the busiest domestic travel week. Avoid both if you can.
• If you book green season, build in a buffer day. With three or four days you can move a volcano hike to whichever morning looks clearest. With one day you are gambling.
• Consider mid-July for a green-season trip. The veranillo dry spell makes those weeks noticeably better than July's 345mm total implies.
• Skip Rio Celeste after heavy rain. It is the one attraction where green season is clearly worse, since downpours can wash out the turquoise colour for days.
• Never plan around lava. Arenal has been resting since 2010 and there is no night-time glow in any season, whatever older photographs suggest.
• Reading further? Our dry season guide and rainy season guide go deeper on each half of the year, and January and October show the two extremes in detail.