May weather in Costa Rica: the complete guide
May in Costa Rica?
Green season begins; afternoon showers on Pacific, mornings still sunny, 25-35% cheaper than peak.
What May actually feels like across Costa Rica
May is the month Costa Rica pivots. The unbroken dry-season skies that defined January through March give way to a new rhythm: sunny mornings, building clouds through midday, and afternoon rain showers that last one to three hours before clearing again. This is not the apocalyptic rain that some visitors imagine when they hear “rainy season” — it is structured, predictable weather that, with a small adjustment to your daily schedule, barely disrupts travel plans at all.
The upside of this transition is significant. Prices drop. Crowds thin. The landscape transforms almost overnight from the parched golden tones of dry-season Guanacaste to the vivid green that earns Costa Rica’s reputation as a tropical paradise. Wildlife becomes more active as the rains trigger breeding cycles. And the Caribbean coast, which follows an inverted pattern, is actually entering one of its better weather windows in May.
This guide breaks down what May means region by region, with honest notes on what to expect, where to invest your time, and how to take advantage of shoulder-season conditions.
Pacific north (Guanacaste): the transition begins
May marks the arrival of the rainy season in Guanacaste, but the arrival is gradual. The first week or two of May often feel like an extension of dry season — bright mornings, warm temperatures (30-35°C), and only the occasional afternoon cloud building over the mountains. By mid-May, the pattern shifts: afternoons bring 1-3 hours of rain, usually from around 2-4pm, followed by clearing skies and often spectacular sunsets.
Rainfall in Guanacaste climbs from near-zero in March to perhaps 80-150mm across May — still modest by global tropical standards, but a clear shift from the bone-dry months before. The landscape greens visibly within days of the first significant rains, and by late May the savannah that was golden brown in March has become lush and vibrant.
The practical implication for visitors: schedule outdoor activities in the morning. Surfing, hiking in Rincón de la Vieja, snorkelling at the Catalinas Islands, and ATV tours all work best before noon in May. Afternoons are good for checking into accommodation, visiting local sodas for lunch, or exploring towns. The rain rarely lasts all evening, and many May days close with clear skies and warm sunsets.
Hotel rates in Tamarindo, Nosara, and Sámara drop noticeably in May — often 25-35% compared to February. This is the month when surf camps, boutique hotels, and yoga retreats at Nosara in particular are most accessible for longer stays.
Pacific central (Quepos, Jacó, Manuel Antonio): good mornings, productive afternoons
Manuel Antonio and Quepos receive more rain than Guanacaste in May — typically 150-250mm across the month — but the pattern holds similar: mornings are generally clear, afternoons bring showers. The forest, already greener than Guanacaste year-round, becomes extraordinarily lush in May. The waterfalls behind Manuel Antonio fill up. The rivers near Quepos run higher and kayaking and rafting conditions improve.
Manuel Antonio National Park in May is notably less crowded than the December-March peak. The daily visitor cap (600 people/day) is rarely hit on weekdays. Weekend visits can still be busy with domestic tourism, but the crowds are a fraction of the high-season intensity. Booking your park entry 2-3 days ahead via SINAC is sufficient for weekdays; a week ahead for weekends.
Wildlife in Manuel Antonio is arguably better in May than in dry season for certain species. Amphibian activity surges with the first rains — red-eyed tree frogs, glass frogs, and poison dart frogs become highly visible near waterways and in the forest undergrowth. The squirrel monkeys that define Manuel Antonio are active year-round, but May’s warmer temperatures and fresh fruit growth make them particularly energetic.
Manuel Antonio NP: guided tour with entrance fee included — from $60Carara National Park, between Jacó and Manuel Antonio, is excellent in May for scarlet macaw activity. Young macaws from the December-March nesting cycle are fledging in April-May, and family groups are frequently visible near the park entrances. This is one of the most accessible scarlet macaw viewing sites in the world, and May mornings here are quiet and productive.
Pacific south (Uvita, Drake Bay, Osa Peninsula): rain arrives in earnest
The southern Pacific and Osa Peninsula receive some of the highest rainfall in Costa Rica, and May marks a significant increase. Uvita and Dominical typically receive 300-400mm in May. The Osa Peninsula (Drake Bay, Puerto Jiménez, Corcovado) can receive even more.
This does not mean the Osa becomes inaccessible in May — Corcovado’s Sirena Station remains open, and Drake Bay’s boat access from Sierpe is possible — but it does mean rain is a daily reality, the roads to Puerto Jiménez and some private reserves become muddier, and wildlife walks involve getting wet. The upside: the Osa in May is extraordinarily lush, fewer visitors means Corcovado guides have more time for you, and lodge prices drop significantly.
Whale watching at Marino Ballena in May falls between seasons — the December-March northern hemisphere season has ended, and the August-October southern hemisphere season has not yet begun. Dolphin sightings are year-round and likely in May, but whale sightings in May are not guaranteed. If whale watching is central to your Uvita visit, August or September is a more reliable window. Our Uvita whale watching season guide has the full breakdown.
Caribbean coast: one of the best windows of the year
May is an excellent month to visit the Caribbean coast — one that most visitors overlook because they assume “rainy season” means bad weather everywhere simultaneously. The Caribbean’s seasonal pattern is inverted relative to the Pacific, and May falls in what is often the Caribbean’s drier stretch.
Puerto Viejo and Cahuita in May typically receive 100-150mm of rain — similar to February, when the Caribbean was wet while the Pacific was dry. The pattern in May is more favourable than February, with longer clear spells and lower humidity. Cahuita National Park’s reef has reasonable snorkelling conditions on clear days. The beaches at Manzanillo and Puerto Viejo are often uncrowded and beautiful.
Cahuita NP: snorkeling & wildlife hike (certified guide) — from $75Tortuguero in May begins to transition toward turtle season. Green sea turtles have not yet arrived to nest in significant numbers (that peaks July-September), but the canal system is beautifully active and boat tours offer sightings of river otters, West Indian manatees, crocodiles, caimans, and an extraordinary diversity of waterbirds. May is one of the quieter months at Tortuguero — before the turtle season surge — and staying at a canal-side lodge in May feels genuinely intimate.
La Fortuna and Arenal: excellent year-round, even better in May
La Fortuna and the Arenal area are among the most weather-resilient destinations in Costa Rica because they receive year-round rainfall regardless of season, and the local attractions — hot springs, hanging bridges, waterfall hikes, white-water rafting — are enhanced rather than diminished by rain.
May is actually a particularly good month for La Fortuna. The La Fortuna waterfall is in high flow, making it one of the most spectacular weeks of the year to visit. Río Celeste in Tenorio National Park — one of the most surreal natural landmarks in Costa Rica — is vivid blue year-round but the park trails are lush and atmospheric in May. White-water rafting on the Sarapiquí River picks up flow and creates better Class III-IV conditions.
La Fortuna: waterfall, Arenal Volcano and hot springs tour — from $95Hot springs in La Fortuna — from budget free springs to the high-end Tabacón and Baldi resorts — are available year-round, and May’s warm-but-not-scorching temperatures make evening soaks particularly pleasant. The volcano itself is usually cloud-covered, but early mornings occasionally produce a clear view of the crater.
Monteverde: green season enhances the cloud forest
Monteverde is one of those destinations that is genuinely good year-round, but May has a particular atmosphere. The cloud forest is at maximum moisture and foliage density, the hanging bridges at Selvatura Park are draped in mist, and the quieter crowds mean wildlife encounters feel more private.
The resplendent quetzal breeding season (which peaks in April-June) is still active in May. Males displaying their long tail feathers in the Monteverde Cloud Forest Reserve and the Curi-Cancha Reserve make May one of the most exciting months for birders. A local guide with a spotting scope significantly improves quetzal sightings — these birds are notoriously difficult to find without someone who knows their territory.
Monteverde: cloud forest reserve guided hike — from $60Cloud forest ziplines and night walks are excellent in May regardless of light rain. The ziplining operators (Extremo, Selvatura, 100% Aventura) run tours in rain with proper gear. Night walks reveal red-eyed tree frogs, kinkajous, olinguitos, and sleeping birds — activity that is actually heightened in the rainy season as amphibians breed.
What to pack for May
May requires flexibility in your kit — mornings are warm, afternoons bring rain, and the Caribbean can be either clear or wet:
- Lightweight, quick-dry clothing suitable for warmth (28-32°C Pacific coast mornings) and sudden showers
- A quality rain jacket — a compact, hooded waterproof jacket is essential; an umbrella alone is not sufficient in forest environments
- Waterproof day pack or dry bag to protect electronics, cameras, and documents
- Rubber boots or waterproof trail runners — useful for Osa Peninsula, Monteverde, and any forest walking in May
- Insect repellent — rain-season insect activity increases in May; DEET-based repellent is advisable for forest and Caribbean areas
- A light layer for evenings in Monteverde and highland areas (18-22°C at cloud forest elevation)
May price reality check
May is genuinely shoulder season and the savings are real:
| Travel style | Daily budget per person |
|---|---|
| Backpacker (hostels, sodas, public bus) | $35-55 |
| Mid-range (2-3 star hotels, shared shuttles) | $90-130 |
| Comfort (4-star eco-lodges, private transfers) | $180-300 |
| Luxury (Tabacón, Nayara, Lapa Rios) | $350-600+ |
These estimates are 25-40% lower than January-March for accommodation. Tour prices are relatively stable year-round, but some operators offer off-season discounts in May. Flights are also typically cheaper in May than December-March from major North American and European departure cities.
Should you visit Costa Rica in May?
May suits travellers who value:
- Value for money: The biggest savings without sacrificing the full range of activities
- Reduced crowds: Popular sites like Manuel Antonio and Monteverde are noticeably less congested
- Wildlife variety: Rain-triggered breeding activity adds amphibians, reptiles, and waterbirds to the mix
- Caribbean coast: May is one of the best months to visit Cahuita and Puerto Viejo
May is less ideal if you:
- Want guaranteed afternoon beach time on the Pacific coast (afternoons have rain)
- Are visiting the Osa Peninsula expecting easy 4WD road conditions (rains make some routes muddy)
- Plan around specific outdoor activities that require all-day sunshine
For more context on balancing costs against conditions, our shoulder season best deals guide has practical booking advice. The green season pros and cons guide gives an honest assessment of what to expect across all green-season months.
Frequently asked questions about May weather in Costa Rica
Is May too rainy for a Costa Rica trip?
No — May is a good-weather month when you plan around the afternoon rain pattern. Pacific coast mornings are reliably clear. Afternoon showers (typically 1-3 hours) are predictable and you can schedule passive activities (lunch, accommodation check-in, naps) around them. The Caribbean coast is actually drier than the Pacific in May.
What is the Caribbean like in May?
May is one of the better months for the Caribbean coast. Puerto Viejo and Cahuita see relatively dry conditions compared to November-January, with good beach and snorkelling days. Tortuguero has active canal wildlife before the turtle season peak. See the Caribbean vs Pacific coast guide for a full comparison.
Is La Fortuna worth visiting in May?
Absolutely — La Fortuna is one of the best destinations in May. The waterfall is in spectacular high flow, Rio Celeste is vivid, and hot springs are pleasant in the evenings. Rain is more frequent but the cloud cover often makes Arenal Volcano visible in the early morning when there is no direct sun heating the air above it.
Can I still surf in May?
Yes — Pacific coast surf spots remain productive in May. The transition to green season often produces better surf conditions for intermediate and advanced surfers as south and southwest swells begin building. Tamarindo, Nosara, and Jacó all offer surf lessons and camps through the green season. Our surf seasons by region guide covers the specifics.
How does May compare to June for weather?
May and June are similar in broad terms — both are early green season with morning sun and afternoon rain — but June tends to be wetter. May has a slightly higher proportion of clear mornings. Late June sometimes features the “Veranillo,” a brief dry spell of 1-2 weeks, though this is unpredictable. The June weather guide has the full breakdown.
Related guides
For a full seasonal overview, see the best time to visit Costa Rica guide. The green season pros and cons guide is essential reading before booking a May-November trip. The June weather guide covers what changes as the rains fully establish. For Caribbean coast planning, the Cahuita destination guide and Tortuguero National Park guide have practical logistics.
Frequently asked questions
Is May a good time to visit Costa Rica?
May is one of the best-value months in Costa Rica. The dry season crowds and prices have disappeared, mornings are still reliably sunny on the Pacific coast, and the first green-season rains bring a burst of vegetation and animal activity. The catch: afternoon showers are likely most days from mid-May, and some outdoor activities need to be planned for morning hours. Budget travellers save 25-35% on accommodation versus January-March.
Where to go in Costa Rica in May?
The Caribbean coast (Cahuita, Puerto Viejo, Tortuguero) is at or near its best in May — the Caribbean's dry season overlaps and conditions are often excellent. The Pacific coast still delivers good mornings; La Fortuna and Arenal are excellent year-round. The Osa Peninsula becomes more challenging as the rains arrive and some roads turn difficult.
What about rain in May?
The Pacific coast transitions into green season during May. Early May (first two weeks) feels more like an extended dry season, with occasional afternoon showers. By mid to late May, expect daily afternoon rain on the Pacific coast lasting 1-3 hours from around 2-4pm. Mornings remain largely clear. The Caribbean coast is notably drier in May than the Pacific — a counter-intuitive fact that makes it one of the best months to visit Cahuita and Puerto Viejo.
How much does it cost in May?
May is shoulder season and marks a genuine drop from peak pricing. Mid-range hotels ($80-120/night) are 25-35% cheaper than January-March rates. Backpackers spend $35-55/day; mid-range travellers $90-130/day; comfort travellers $180-300/day. Luxury properties see smaller drops (10-20%) but still have better availability. May is the best month to access high-end eco-lodges at reasonable rates.
What wildlife is active in May?
May sees some of Costa Rica's most exciting wildlife activity. Leatherback turtle nesting wraps up at Playa Grande. Green sea turtles begin pre-arrival activity near Tortuguero. Baby scarlet macaws fledge from Carara National Park nests. Poison dart frogs become highly active as the rains trigger breeding. Humpback whale watching (southern hemisphere season) begins in August, so May is a gap — the water around Marino Ballena is calm but whale sightings are not guaranteed.