Every country, and the places worth the trip 26,398 places across 240 countries Guess the country
Meridiela.

Marais de Yiyi

Coastal marshes near Sinnamary with a visitor house and boardwalk over the swamp.

Updated 3 September 2026

WhereSinnamary
Nearest citySinnamary
Best seasonJuly to November
Time to allowHalf a day
Getting thereOff the coast road east of Sinnamary; visitor centre and boardwalk
EntryFree; guided outings charged

The Yiyi marshes spread behind the coast between Sinnamary and Iracoubo, a mosaic of wet savanna, swamp forest and open water, and the Maison de la Nature on the road gives the territory's easiest wetland access: a boardwalk out over the swamp, an observation platform, and guided canoe outings onto the channels. Hoatzins rustle in the bushes along the water and caimans lie in the channels.

The landscape

  • The boardwalk - the walkway out over the swamp from the visitor house.
  • The hoatzins - the prehistoric-looking birds in the waterside bushes.
  • The wet savanna - the open flooded grassland behind the coast.
  • The canoe outings - guided trips onto the channels.

When to go

July to November is the dry season with concentrated wildlife. The wet season floods the savanna and changes the birdlife. Early morning and late afternoon are best.

What to expect

The boardwalk is short and the reserve's depth needs the guided canoe trips, which run on a schedule. Mosquitoes are fierce at dusk. Big caimans are seen occasionally, not reliably.

Nearby

Sinnamary is west, and Kourou is east.

What to pack for Marais de Yiyi

Chosen from what this place is for. Tap a kit for the full checklist.

  • Broken-in walking shoes or boots - Grip and ankle support matter more than looks; never hike in brand-new boots. Find on Amazon
  • Quick-dry clothing - Board shorts or synthetics that shrug off spray and dry fast. Find on Amazon
  • Binoculars - The single best wildlife tool - even a compact pair transforms a sighting. Find on Amazon
  • Layers + a waterproof shell - Mountain weather turns fast; a packable rain jacket saves the day. Find on Amazon

Some links on this page are Amazon affiliate links - if you buy through them we may earn a small commission at no extra cost to you.

All packing kits

Plan your trip

Where to start if Marais de Yiyi is going on the list.

Booking links on this page are affiliate links - if you book through them we may earn a small commission at no extra cost to you. It never changes what we write about a place.

Opening times, ticket prices and seasonal closures change - check the official source before you go: official site.

← More nature & outdoors in French Guiana

One place a week.

A short Friday email about one place worth knowing.