Tides reshape Bijagós Archipelago in Guinea-Bissau

Twice daily, the tides surge and recede through a labyrinth of sandy channels, mudflats and mangrove forests that fringe the 88 islands and islets of Guinea‑Bissau’s Bijagós Archipelago. A satellite image captured on 28 November 2025 illustrates the dramatic transformation of the seascape, showing expansive intertidal mudflats and sandflats exposed at low tide and rapidly submerged as the water returns. The rhythmic ebb and flow sculpt the coastal terrain, reshaping shorelines and influencing sediment distribution across the archipelago’s extensive wetlands.

The tidal dynamics are a defining feature of the Bijagós ecosystem, supporting a rich mosaic of marine and terrestrial habitats that host diverse flora and fauna, including migratory birds, fish nurseries and mangrove species. Seasonal variations in water level affect local fishing practices, navigation routes and the livelihoods of communities that depend on the archipelago’s natural resources. Continued monitoring of these tidal patterns is essential for managing coastal resilience and preserving the ecological integrity of one of West Africa’s most distinctive maritime landscapes.