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Lapa RiosSeptember 2026

Most rooms run 1,061/night.Here's when it's worth it — and when to avoid.

Monthly Scores & Pricing

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Best Value
Adventure mode

September 2026

Trip type
Value verdictValue verdict
Score
82 / 100
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Avg Rate
—
Best Week From
— ★
Temp Range
75.4-83.1°F
Crowds
Low
Rain Risk
High
Why September

September is the peak of southern humpback whale season in the Golfo Dulce. Whale density is at its maximum, with large competitive groups, singing males, and nursing mothers operating simultaneously in the protected inner waters. This is the extraordinary event the Osa Peninsula is known for in marine biology circles. The tradeoff is that September is also the wettest month for rain days — and the Corcovado Sirena station boat transfer from Puerto Jiménez faces rough sea conditions that regularly make it inadvisable or impossible on the Pacific side.

What's possible this month
Book a Golfo Dulce whale watching tour at the absolute peak of southern humpback season — large competitive groups and mother-calf pairs are reliably present
Listen for male humpback song from the boat as competing groups move through the inner fjord
Track the four-monkey morning walk through the lower canopy reserve in the brief dry window before rain arrives
Rappel the King Louis Waterfall at maximum wet-season volume
Conditions
🌞 Warm 83.1°F days💧 High humidity🌅 12hr daylight
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Corcovado boat transfer is unreliableThe rough Pacific sea state in September makes the boat transfer to Corcovado's Sirena station inadvisable on many days and impossible on some. SANSA small-plane flights from San José are also subject to weather delays and cancellations in the peak rainy period. Do not schedule an international connection on the same day as your domestic leg. Build a buffer day in San José.
September 2026 — Daily Rate Tracker
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Wildist Research

Not just when it's cheapest.
When it's worth it.

We study Lapa Rios year-round. Tell us your travel style and we'll tell you the best time to book.

✓The best months for your trip type
✓The weeks worth paying more for — and the ones to avoid
✓The best way to book when you're ready

Free · Independent Research Guide

Before you book September at Lapa Rios

If you're planning a trip to Lapa Rios in September, expect temperatures ranging from 75.4-83.1°F alongside 12hr daylight. You'll be navigating low crowds with a high risk of rain.

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