SeasonMapJacó weather in May
Costa Rica
May in Jacó: sweltering, soaked, with clean air — a gamble, with 31 rainy days.
#6 of 12 months in Jacó · #1121 of 1383 destinations to visit in May · comfort 62/100 (tier C)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Jacó in May
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Jacó climate normals — May
| Daytime high | 28°C / 83°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 25°C / 77°F | |
| Feels like (high) | 35°C / 95°F | |
| Sea temperature | 31°C / 87°F | ♨️ bath-warm |
| Rainfall | 582 mm / 22.9 in | ⛈ soaked |
| Rainy days | 31 days | |
| Humidity | 88% | 💦 very humid |
| Dew point | 25°C / 76°F | |
| Sunshine | 8.3 h/day | |
| Daylight | 12.6 h | |
| Wind | 10 km/h / 6 mph | |
| Air quality (US AQI) | 30 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Jacó in May
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Shoulder seasonan ordinary month(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Jacó's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherJacó's weather peaks January–March, best around February.
Best weatherFair weatherToughest weather
What's on in Jacó in May
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
South swell season
1 Apr – 31 Oct · usuallySurf seasonThe southern-hemisphere swells arrive through the middle of the year. Playa Hermosa a few minutes down the coast is the serious wave and holds national contests; Jaco's own beach is where people learn.
- Season
Green season
1 May – 30 Nov · usuallyMonsoonMornings stay clear and the rain comes after lunch, hard and short. Rates drop by a third, the hills opposite turn over, and September and October are the two months that genuinely stay grey.
- Season
Wet season
MonsoonRisk31 rainy days and about 582 mm in the month — the real kind of rainy season, not afternoon showers.
from the climate normals
Nearby, and something's on
Within 300 km of Jacó — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Jacó?
Jacó in May — FAQ
- Is May a good time to visit Jacó?
- May in Jacó: sweltering, soaked, with clean air — a gamble, with 31 rainy days. It ranks #6 of 12 months for Jacó on SeasonMap's comfort score (62/100).
- What is the weather like in Jacó in May?
- In May, Jacó averages a daily high of 28.3°C and a low of 25°C, with about 581.8 mm of rain over roughly 30.7 rainy days.
- What is the air quality in Jacó in May?
- Jacó has a mean US Air Quality Index of about 30 in May.
Other months in Jacó
Compare Jacó in May
Warmer or cooler than Jacó in May
Similar destinations in Central America — May
Within 300 km: Tortuguero's Leatherback nesting around 1 Mar – 31 May, and Boquete's Quetzal nesting season around 1 Feb – 30 Jun.