May opens the green season in Manuel Antonio: a lush rainforest, sunny mornings followed by afternoon showers, low-season prices, and thin crowds. Here is what to expect and how to plan around the rain.
What You Should Know
- May begins the green season in Manuel Antonio: the rainforest turns lush, mornings are usually sunny, and afternoon showers return. It is one of the quietest, lowest-priced months of the year.
- The rain pattern is gentle at first. Early May often keeps long bright mornings with only occasional afternoon showers; the rains build steadily as the month goes on toward the wetter mid-year.
- The main tradeoff is the afternoon rain and slightly lower snorkeling visibility as river runoff returns. Wildlife and most tours are unaffected, and the value is excellent.
- Whale watching is between seasons in May: the northern humpbacks have gone and the southern season does not start until about July, so May is not a whale month.
Manuel Antonio in May: The Honest Picture
⭐ Best May window: the first half of the month (about May 1 to 15). The rains are still light and building, so early May often keeps long sunny mornings with only occasional afternoon showers, alongside low-season prices and few crowds.
| Factor | May Rating |
|---|---|
| Weather | 7/10 — sunny mornings, afternoon showers |
| Crowds | 7/10 — quiet low season |
| Prices | 7/10 — low green-season rates |
| Wildlife & National Park | 9/10 — lush and active in the mornings |
| Snorkeling | 7/10 — visibility easing as runoff returns |
| Surf | 7/10 — building south swell; good for intermediates |
| Rain | 6/10 — afternoon showers return |
| Families | 8/10 — quiet, lush, good value |
| Couples | 8/10 — lush, quiet, and affordable |
💰 Average May hotel prices (Manuel Antonio/Quepos, mid-range):
Most of May: ~$140/night · long weekends slightly higher
Rough mid-range estimates; rates vary by property and booking lead time.
May is when Manuel Antonio trades the dry season's reliable sun for the green season's lush forest, low prices, and quiet. The rains return, but gently at first: mornings are usually bright, and the showers tend to arrive in the afternoon. For travelers who plan around that rhythm, May offers some of the best value of the year with the rainforest at its most alive.
Visiting Manuel Antonio in May means accepting some afternoon rain in exchange for real upsides: thin crowds, low-season hotel rates, and a green, photogenic landscape. The national park, mangroves, ziplining, and night tours all run normally, and wildlife is active and easy to find on the cooler, greener mornings.
We'd lean toward May for budget-minded travelers, wildlife lovers, and anyone who prefers a quiet trip over guaranteed sun. The honest tradeoffs are the afternoon showers and slightly cloudier water for snorkeling as runoff returns. This guide covers the weather week by week, how May compares to the rest of the year, what the green season does for wildlife and value, and the activities that shine this month.
Who May suits best:
- Budget travelers: green-season rates are well below the dry-season peak, and May is one of the cheapest, quietest months of the year.
- Wildlife lovers: the forest is lush and bird activity is high; mornings deliver excellent sightings.
- Crowd-avoiders: May is genuinely quiet, a contrast to the busy dry-season months.
- Sun-only beach trips: less ideal. If you need all-day sun every day, the dry season is the safer choice.
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Manuel Antonio Weather in May
| Metric | May |
|---|---|
| Avg High | 32°C (90°F) |
| Avg Low | 23°C (73°F) |
| Water Temp | 28–29°C (82–84°F) |
| Rain Days | ~17 |
| Humidity | Moderate to high |
| Wind | Low |
| Rain Level | Moderate (afternoon showers return) |
Temperature and Humidity
May stays warm, with daytime highs around 32°C (90°F) and overnight lows near 23°C (73°F). Humidity climbs from the dry-season months as the rains return, so the air feels heavier, especially before an afternoon storm. The trade is that the heat is a touch less relentless than the hot, dry March and April, since cloud cover and rain cool the afternoons.
Rain Pattern
May is the start of the green season, and its rain is typically a gentle version of the pattern: bright mornings, building cloud through midday, and showers or a storm in the afternoon or evening. Early May is often still quite dry, with rain becoming more regular as the month progresses. Full-day rain is uncommon this early in the season. The reliable bright mornings are what make May so workable.
Sea and Outdoor Conditions
The Pacific stays warm at 28 to 29°C (82 to 84°F). Snorkeling visibility eases from its dry-season peak as river runoff returns after rain, so it becomes a conditions-dependent activity rather than a sure thing. Surf builds as the green-season south swell fills in, which suits intermediate surfers and still gives beginners good morning sessions. Trails green up and can be muddy after an afternoon storm.
Manuel Antonio in May: Crowds and Prices
May is a low-season month: quiet and affordable, with only minor bumps around local long weekends.
- May 1 to 15 (early green season): The quietest, driest part of the month. Crowds are thin, rates are low, and the rain is still light. This is the best balance of value and weather in May.
- May 16 to 31 (rains building): Still quiet and cheap, with more regular afternoon showers as the green season settles in. Good value for travelers who do not mind planning around the rain.
- Local long weekends: Costa Rican holidays can briefly raise domestic demand at the beaches, but nothing like the dry-season or Semana Santa peaks.
Expect mid-range Manuel Antonio hotels to run around $140 per night through May, with beachfront and boutique properties higher and some properties offering green-season promotions. Tour prices stay broadly stable year-round, so the savings come mainly from lodging and from the easy availability that comes with low season.
Is May a Good Time to Visit Manuel Antonio?
Yes, if you value low prices, thin crowds, and a lush landscape over guaranteed all-day sun. May is one of the best green-season months because the rains are still building: you usually get bright mornings for activities and showers in the afternoon, at low-season rates.
May vs Other Months
| Month | Weather | Crowds | Prices | Overall |
|---|---|---|---|---|
| March | 9/10 — hot and reliably dry | 4/10 — busy; Semana Santa late | 3/10 — high | Hot, dry, dependable; mind Holy Week |
| April | 8/10 — hottest; first rains late | 6/10 — eases after Semana Santa | 5/10 — shoulder begins | Dry-season value once Holy Week passes |
| May | 7/10 — sunny mornings, afternoon rain | 7/10 — quiet | 7/10 — low | Lush, cheap, and quiet; gentle rains |
| June | 7/10 — green season; afternoon rain | 7/10 — quiet | 7/10 — low | Lush and quiet with reliable afternoon rain |
| July | 8/10 — veranillo dry spell likely | 5/10 — summer-holiday uptick | 6/10 — moderate | Brightest green-season month; whales return |
May vs April
April and May sit on opposite sides of the season change. Late April is still mostly dry at shoulder prices; May is greener and cheaper with regular afternoon showers. We'd pick late April for travelers who still want near-dry weather, and May for those who prioritize low prices, quiet, and a lush forest and do not mind planning around the rain. Our Manuel Antonio in April guide covers that month in detail.
So, When Should You Visit?
For guaranteed sun, the dry season (December through April) is the safe choice. For value, quiet, and the lushest scenery, the green season that starts in May is the trade, with July often the brightest green-season month thanks to the veranillo. Our Manuel Antonio in summer guide covers the June-to-August window in detail.
Green Season Begins: Lush Forest, Active Wildlife, and Value
May's draw is the green season at its gentlest: a lush, photogenic rainforest, active wildlife, and the year's best value, all without the heavy rain that arrives later in the season.
A Lush, Active Forest
Once the rains return, the forest greens up fast, and wildlife stays active. Sloths, white-faced capuchin and squirrel monkeys, iguanas, and toucans are all out on the cooler, greener mornings, and a guided national park tour in the early hours is excellent. Bird activity is high in the green season, so birdwatching is a strong May choice. Go early, before the afternoon clouds build.
Rain-Proof Wildlife Tours
Some of the best May experiences are unaffected by the rain. The Damas Island mangrove tour runs through a sheltered estuary where humid, overcast conditions often bring wildlife into easier view, and the guided night walk comes into its own as frogs and nocturnal species grow more active in the wet months. Both are natural afternoon and evening picks when the showers arrive.
Low-Season Value
May delivers the green season's core advantage: low prices and thin crowds. Hotel rates drop well below the dry-season peak, the national park and trails are quieter, and tours are easy to book close to your dates. We'd choose May for travelers who want the rainforest experience without the cost or the crowds of high season.
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The Rains Return: What Afternoon Showers Mean in May
May's one thing to plan around is the rain, and the good news is that it is the gentlest rain of the green season. Knowing the daily rhythm is most of the planning.
The Daily Pattern
A typical May day starts bright, clouds build through midday, and showers or a storm arrive in the afternoon or evening, often clearing overnight. That means mornings are reliable for outdoor activities, so front-load the day: park visits, birding, waterfalls, and surf lessons all work best before the clouds build, with the afternoon left flexible.
What the Rain Affects, and What It Does Not
Snorkeling visibility is the main casualty: river runoff after rain can cloud the water, so treat snorkeling as conditions-dependent in May. Trails can get muddy, so closed-toe shoes with grip help. But wildlife, mangroves, ziplining, night tours, and the national park all run normally, and the cooler, greener afternoons are pleasant. Pack a light rain layer and quick-dry clothing and the rain becomes a non-issue. Our Manuel Antonio in summer guide covers the deeper green season that follows.
The Best Activities in Manuel Antonio in May
Everything is open in May, and the key is timing: outdoor activities in the morning, rain-proof options in the afternoon. The table below rates each activity for the month.
| Activity | May Rating | Best Time of Day | Notes |
|---|---|---|---|
| National Park Tour | 9/10 | Early morning | Lush and active; go before afternoon rain |
| Birdwatching | 9/10 | Early morning | High bird activity in the green season |
| Mangrove Tour | 9/10 | Morning | Sheltered estuary; rain rarely a factor |
| Night Tour | 9/10 | Evening | Frogs and nocturnal wildlife most active |
| Ziplining | 8/10 | Morning | Runs rain or shine; canopy gives cover |
| Waterfall Tours (Nauyaca) | 8/10 | Morning | Water volume rising; trails greener and muddier |
| Naranjo River Rafting | 8/10 | Morning | El Chorro section runs to about May 15; lower river year-round |
| Surf Lessons | 8/10 | Morning | Building south swell; calmer at dawn |
| Chocolate Tour | 8/10 | Afternoon | Covered; an easy rainy-afternoon pick |
| ATV Tour | 7/10 | Morning | Muddy and fun; go early before the rain |
| Horseback Riding | 7/10 | Morning | Greener trails; can be muddy |
| Snorkeling & Sailing | 7/10 | Morning | Visibility conditions-dependent after rain |
Best in May
The national park tour, birdwatching, and the Damas Island mangrove tour are at green-season strength, with the lush forest and high wildlife activity working in their favor. The night walk is also at its best as the wet months bring out frogs and nocturnal life.
Easy Picks When It Rains
For the afternoon, the sheltered mangrove tour, the covered chocolate tour, and the evening night walk all run regardless of the weather, so a wet afternoon never costs you a day.
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More May Activities Worth Knowing About
These May-friendly experiences do not have their own dedicated guides on this site yet, but all are well established and suited to the early green season.
Manuel Antonio Beaches (Espadilla and Biesanz)
Playa Espadilla and the sheltered Biesanz Bay are warm and usually calm on May mornings, and the beach is at its quietest of the year. Mornings are the window; afternoons bring cloud and the chance of a shower. The water is still warm and inviting between storms.
Rainmaker Conservation Park
Rainmaker is a private rainforest reserve inland from Quepos with hanging bridges, trails, and waterfalls. The green season is when it is most lush and the waterfalls run fuller, and the canopy offers some cover from a passing shower. A quieter, wilder alternative to the national park.
Quepos and Marina Pez Vela
The town of Quepos and its marina are quiet and easygoing in May, and the marina's waterfront restaurants are a relaxed evening out, often a good spot to wait out an afternoon storm. Sportfishing continues year-round, though the dry-season months are calmer at sea.
Rainforest Photography
May is one of the best months for rainforest photography: saturated greens, full waterfalls, dramatic skies, and mist rising off the canopy after a storm. The light in the bright mornings and the moody afternoons gives the forest a depth the dry season cannot match.
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From Our Experience
What we consistently see is that travelers who treat May mornings as their main event and leave afternoons loose come away thinking the green season is underrated. The rain is rarely the all-day downpour people fear; it is a predictable afternoon visitor you can plan around, and the prices and quiet are a real reward for doing so.
Tips for Visiting Manuel Antonio in May
- Front-load your days: mornings are usually bright, so schedule the national park, birding, waterfalls, ATV, and surf for the early hours and keep the afternoon flexible for rain.
- Lean on rain-proof tours for the afternoon: the mangrove tour, chocolate tour, and night walk all run regardless of the weather and make ideal second-half-of-day plans.
- Pack for the green season: a light rain layer, quick-dry clothing, and closed-toe shoes with grip handle May far better than beachwear alone. Trails get muddy after a storm.
- Treat snorkeling as conditions-dependent: river runoff can cloud the water after rain, so book snorkeling with flexibility and aim for a clear morning earlier in the month.
- Take advantage of low-season value: May has some of the lowest hotel rates and thinnest crowds of the year, and tours are easy to book close to your dates.
- Don't plan a May trip around whales: the northern season has ended and the southern season starts around July, so there is no reliable whale watching in May.
- Plan your transfer from San José around the morning: the drive is roughly 3 hours and easier before the afternoon rain. Our San José to Manuel Antonio guide covers private transfers, shuttles, and the public bus.
- Came from April, or considering it? Our Manuel Antonio in April guide covers the end of the dry season, the Semana Santa peak, and the shoulder-season value that precedes May.
- Heading into June? Our Manuel Antonio in June guide covers the green season in full swing: lush forest, low prices, and reliable afternoon rain.
- Want the deeper green season? Our Manuel Antonio in summer guide covers June through August, the July veranillo dry spell, and which tours hold up best to afternoon rain.
How We Put This Guide Together
The Costa Rica Day Trip team built this guide from seasonal weather patterns, national park access rules, operator availability windows, and verified traveler review patterns across every major Manuel Antonio activity category. May is the start of the green season, so we focused on the factors that genuinely change with it: the return of afternoon rain, the drop in prices and crowds, and the shift in which activities are at their best. Ratings reflect documented seasonal conditions rather than a best-case picture. This guide was reviewed and updated in May 2026. Green-season conditions vary year to year, with the exact onset of the rains shifting by a couple of weeks, so we recommend confirming tour availability close to your dates. Every activity linked here has its own dedicated guide with operator comparisons and real review data.
Frequently Asked Questions
Is Manuel Antonio good in May?+
Yes, if you value low prices, thin crowds, and a lush rainforest over guaranteed all-day sun. May begins the green season, with bright mornings and afternoon showers, at some of the lowest rates of the year. Wildlife is active, the forest is at its most photogenic, and most tours run normally. The main tradeoffs are the afternoon rain and slightly cloudier water for snorkeling as river runoff returns.
What is the weather like in Manuel Antonio in May?+
May is warm and increasingly green. Daytime highs run around 32°C (90°F) with lows near 23°C (73°F), and the Pacific stays warm at 28 to 29°C. The pattern is bright mornings, building cloud through midday, and showers or a storm in the afternoon or evening. Early May is still fairly dry, with rain becoming more regular as the month progresses. Full-day rain is uncommon this early in the season.
How much does it rain in Manuel Antonio in May?+
May has around 17 rainy days on average, but most rain falls in the afternoon and evening rather than all day. Mornings are usually bright, which is what makes May so workable: you front-load outdoor activities and keep the afternoon flexible. The rain is the gentlest of the green season in May, building toward the wetter mid-year months of September and October.
Is May cheap in Manuel Antonio?+
Yes. May is one of the lowest-priced, quietest months of the year. Mid-range hotels run around $140 per night, well below the dry-season peak, and some properties offer green-season promotions. Tours are easy to book close to your dates, and crowds at the national park and on the beaches are thin. The savings come mainly from lodging, since tour prices stay broadly consistent year-round.
What is the best week to visit Manuel Antonio in May?+
The first half, roughly May 1 to 15. The rains are still light and building, so early May often keeps long bright mornings with only occasional afternoon showers, alongside low-season prices and few crowds. The second half stays quiet and cheap but sees more regular afternoon rain as the green season settles in.
What activities are best in Manuel Antonio in May?+
The guided national park tour, birdwatching, and the Damas Island mangrove tour are at green-season strength, with the lush forest and high wildlife activity in their favor. The night walk is also at its best as the wet months bring out frogs and nocturnal life. For rainy afternoons, the sheltered mangrove tour, the covered chocolate tour, and the evening night walk all run regardless of the weather.
Can you see whales in Manuel Antonio in May?+
Not reliably. May falls in the gap between Costa Rica's two humpback seasons: the northern-hemisphere whales leave by about March, and the southern-hemisphere season does not begin until around July. Boat and sailing tours still run for reef snorkeling, the coastline, and dolphins, but whale watching is essentially out of season in May.
When does the rainy season start in Manuel Antonio?+
The green (rainy) season generally begins in May, sometimes with a preview of afternoon showers in late April. Early May is often still fairly dry, with the rains building steadily through the month and into the wetter mid-year. The pattern is reliably bright mornings followed by afternoon or evening showers, rather than all-day rain, until the peak of the wet season in September and October.
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