SeasonMapTortuguero weather in September
Costa Rica
September in Tortuguero: sweltering, soaked, with clean air — a gamble, with 29 rainy days.
#6 of 12 months in Tortuguero · #1182 of 1383 destinations to visit in September · comfort 56/100 (tier D)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Tortuguero in September
No notes yet. Open Tortuguero on the map to add the first one.
Tortuguero climate normals — September
| Daytime high | 29°C / 84°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 24°C / 75°F | |
| Feels like (high) | 36°C / 97°F | |
| Sea temperature | 30°C / 87°F | ♨️ bath-warm |
| Rainfall | 279 mm / 11 in | ⛈ soaked |
| Rainy days | 29 days | |
| Humidity | 90% | 💦 very humid |
| Dew point | 24°C / 76°F | |
| Sunshine | 9.2 h/day | |
| Daylight | 12.2 h | |
| Wind | 10 km/h / 6 mph | |
| Air quality (US AQI) | 26 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Tortuguero in September
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.
BusyGreen turtle nesting, school holidays in 2 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Tortuguero'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 weatherTortuguero's weather peaks February–April.
Best weatherFair weatherToughest weather
What's on in Tortuguero in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Nature
Green turtle nesting
1 Jul – 31 OctCrowdedBook earlyThe largest green turtle rookery in this half of the world, tens of thousands of females on a strip of black sand. Tours leave at eight and ten with a licensed guide: no torches, no cameras, dark clothes, and hatchlings running by October. Source ↗
- Season
The September dry spell
1 Sep – 31 Oct · usuallyDry seasonThe Caribbean lowlands get a break from the rain in September and October, which lands on the tail of the nesting season. The canals are calmer and the boat from La Pavona keeps to its times.
- Season
Wet season
MonsoonRisk29 rainy days and about 279 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 Tortuguero — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Tortuguero?
Tortuguero in September — FAQ
- Is September a good time to visit Tortuguero?
- September in Tortuguero: sweltering, soaked, with clean air — a gamble, with 29 rainy days. It ranks #6 of 12 months for Tortuguero on SeasonMap's comfort score (56/100).
- What is the weather like in Tortuguero in September?
- In September, Tortuguero averages a daily high of 29.1°C and a low of 23.9°C, with about 278.8 mm of rain over roughly 28.5 rainy days.
- What is the air quality in Tortuguero in September?
- Tortuguero has a mean US Air Quality Index of about 26 in September.
Other months in Tortuguero
Compare Tortuguero in September
Warmer or cooler than Tortuguero in September
Similar destinations in Central America — September
Within 300 km: Jacó's Humpback whales around 15 Jul – 15 Nov, and Bocas del Toro's Sea turtle nesting around 1 Mar – 31 Oct.