Manuel Antonio Rainy Season vs Dry Season (2026): Which Should You Book?

⭐ Short answer: if this is a beach holiday and you want guaranteed sun, book December to April and accept the prices and the queues. If you want quiet trails, the greenest forest, the best surf and rates at their lowest, book May to November and run your days in the morning. If you want both, aim for late April, May, or late November into early December.

Manuel Antonio runs on two clear calendars. The dry season covers December through April and peaks in February and March, when rain falls on roughly three days a month and the beach is effectively a certainty. The green season runs May through November and peaks in September and October, when rain falls on 21 to 22 days a month and some smaller businesses close for the quietest weeks of the year.

The biggest difference is the number of wet days, not the heat, the sea or even the wildlife. Capuchins, sloths, coatis and the park's 180-plus bird species are here in every month. What green season really takes from you is the reliability of an afternoon plan, and what it gives back is a national park you can walk without a crowd, a rainforest at full saturation, larger swell for surfing, and hotel rates that fall to their annual floor.

We have written this 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 kinds of traveller. For the deep dives, our Manuel Antonio dry season guide and Manuel Antonio rainy season guide cover each half of the year in full, and best time to visit sets out the whole calendar.

Here is the full comparison in one place. Every rain-day figure below comes from our own month-by-month Manuel Antonio guides, and the crowd and price notes follow the local high and low season rhythm.

Read down that table and the pattern is clear: dry season wins everything that depends on a reliable afternoon, and green season wins everything that depends on price, quiet and water. Our view is that there is no wrong answer here, only a mismatch between what a traveller wants and which season they book.

The most useful thing to understand about Manuel Antonio's climate is that temperature barely moves all year, while the number of wet days swings sevenfold. Daytime highs sit between 30 and 33°C every month, nights hold around 23°C, and the sea stays at 28 to 29°C. What actually changes your trip is how many days see rain, and when.

Full Month-by-Month Figures

What the Numbers Actually Mean

Three things stand out. First, February and March are the driest months by a wide margin at roughly three rain days each, which is why the dry season peaks then rather than in December. Second, October is the wettest at around 22 rain days, with September just behind. Third, the transition is abrupt rather than gradual: April jumps from about 6 rain days to 17 in May, so the season flips within weeks rather than easing in.

The temperature column is almost a flat line, and that is the point. This is the crux of the whole comparison: choosing when to visit Manuel Antonio is a decision about rain, humidity and crowds, not about heat. The sea is swimmable at 28 to 29°C every month of the year.

ℹ️ Figures are typical monthly averages drawn from our month-by-month Manuel Antonio guides and are indicative rather than exact. Conditions vary year to year, so 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: a wet afternoon, or paying peak rates and queuing for a park ticket. Answer honestly and the season chooses itself. In our experience the travellers who regret their timing are almost always the ones who booked September expecting a pure beach holiday, not the ones who paid more in February.

This is the comparison most visitors get wrong. Manuel Antonio National Park is a year-round destination, and the animals do not migrate out for the wet months. Capuchins, three-toed sloths, coatis, agoutis and more than 180 bird species are present in every month of the calendar. What changes between the seasons is the ground under your feet, the crowd around you, and how easy the entrance ticket is to get.

The verdict is a narrow dry-season win, and only on logistics. Firm footing and clean sightlines make a dry-season national park tour the easier experience, but a green-season visit puts you on a near-empty trail in a forest at full saturation, which many repeat visitors prefer outright. In either season, hire a guide with a scope: that single decision changes your sightings far more than the month does. For after dark, our night tour guide covers the walk that green season genuinely improves, and birdwatching works across the whole calendar.

Here the two seasons genuinely divide. The beach itself belongs to the dry months, because a beach day is an afternoon activity and dry season is where reliable afternoons live. The surf belongs to the green months, because the swell is bigger and more consistent. And the water temperature belongs to neither, because it does not change.

What we consistently see is that visitors overestimate the sea and underestimate the sky. Nobody has ever found the water cold in Manuel Antonio, in any month, and quoting the sea temperature as a reason to pick a season is simply noise. The real coastal question is whether you need the afternoon to hold. If the answer is yes, book dry season. If you would rather have empty sand and better waves, take the green months and book your surf lessons then. Keep snorkelling for the dry months when clarity is at its best.

The gap between the two seasons is wider in your booking confirmation than in the forecast. Manuel Antonio's peak stretches from around December 20 through Semana Santa in April, and across that window hotels, tours and park entry all compete for the same limited supply. September and October sit at the opposite pole: the lowest visitor numbers, the easiest availability and the lowest rates of the year.

Two details are worth planning around. First, green season is not uniformly quiet: July and August pick up with northern-hemisphere family holidays, and mid-July brings the veranillo, a short dry spell that makes those weeks better than 15 rain days suggests. Second, the September and October closures are real. A handful of restaurants and smaller operators shut for the quietest weeks, so check that what you are counting on is open before you commit.

Our honest read is that September and October offer the strongest value in the region and the weakest weather in almost exactly equal measure. If budget is the binding constraint, those months genuinely work, provided you accept 21 or 22 wet days and plan your mornings properly. Our October guide and September guide set out what that trip actually looks like, and where to stay covers the areas that hold up best in either season.

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 the seasons rather than either extreme, because the shoulder weeks hand you most of the dry season's reliability at close to green season's prices.

Late April is the pure-value end of dry season. Rain days sit at about six for the month, the beach still behaves, and the moment Semana Santa passes the crowds and prices fall away while the weather holds. It is very close to the February trip for meaningfully less friction on bookings.

May is our own favourite compromise and the closest thing to having both seasons at once. Rain days jump from about 6 to about 17, which sounds worse than it feels: the showers concentrate in the afternoon, the mornings stay workable, and the forest transforms from dry-season brown edges to full green within a fortnight. Meanwhile the park cap stops binding and rates drop to low-season levels.

Late November into early December runs the same trade in reverse. Rain days fall from October's 22 to about 15 in November and about 9 in December, the rainforest is still carrying all the lushness of the wet months, and the beach days start behaving again. The catch is a hard deadline: from around December 20 the Christmas peak arrives, rates jump to their annual maximum and the park sells out, so this window closes fast.

If you only take one thing from this page, take that. The travellers who get the best Manuel Antonio 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 afternoon first. It is the only factor where the seasons are truly far apart. If you need reliable afternoons, book December to April and stop optimising anything else.
• Ignore temperature and sea temperature completely. Highs run 30 to 33°C and the water sits at 28 to 29°C in every single month. Neither should influence your choice, and you pack identically either way.
• Book park entry ahead in dry season. The daily visitor cap sells out regularly between December and April, and it is the one thing you cannot fix on arrival.
• Book outdoor activities for mornings in both seasons. The pattern is the same year-round, just stricter in the green months: clearest early, wettest from mid-afternoon.
• Do not treat green season as a washout. Even October's 22 rain days mostly mean showers arriving after lunch rather than all-day rain, and the sea is exactly as warm as it is in March.
• 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 in Costa Rica.
• Check September and October openings. Some restaurants and smaller operators close for the quietest weeks, so confirm anything you are relying on before you book flights.
• Consider mid-July for a green-season trip. The veranillo dry spell makes those weeks noticeably better than July's 15 rain days implies.
• Match the whales to your dates, not the other way round. Humpbacks pass roughly July to October and again roughly December to March, so both seasons have a genuine window.
• Pack a light rain shell in every month. Even February and March average about three wet days, and a shower on the park trail is possible in any season.
• Reading further? Our dry season guide and rainy season guide go deeper on each half of the year, and February and October show the two extremes in detail.