The Lesser Antilles mangroves ecoregion (WWF ID: NT1416) covers the salt-water habitats along the coasts of the islands on the divide between the Caribbean Sea and the Atlantic Ocean.

The mangroves are found on coastal lowlands where salt-water wetlands penetrate.

This climate is characterized as hot, humid, and having at least 60 mm of precipitation every month.

[5][6] Differences in mangrove character among the islands is affected by salinity and nutrient levels.

The more northerly islands have higher salinity levels, and more diverse reefs and sea grass beds associated with mangroves.