Basse-Terre

Basse-Terre is the volcanic western wing of Guadeloupe — the island that carries the active La Soufrière stratovolcano (1,467 m), dense tropical forest covering the Parc National de la Guadeloupe interior, and some of the finest diving in the Caribbean at Pigeon Island's Jacques Cousteau Underwater Reserve. Despite sharing Guadeloupe's name, Basse-Terre is the quieter and more dramatically scenic of the two main islands. The administrative capital, also named Basse-Terre, sits on the southwest coast; the tourist infrastructure is lighter and more dispersed than on Grande-Terre. The coastline of Basse-Terre is volcanic: black and grey sand beaches, rocky headlands dropping steeply to deep water close inshore, and lava-formed seabed structure that creates complex dive terrain. The northwest coast — Deshaies in particular — offers the best-sheltered anchorages; the southwest coast from Vieux-Habitants to Trois-Rivières faces southeast and catches residual Atlantic swell that wraps around the southern tip. Tidal range across Basse-Terre is the same mixed-semidiurnal microtidal pattern: spring range 0.3–0.5 m. The steep volcanic seabed means minimal intertidal zone on most of the coast — the tide does not expose broad flats here the way it does on the limestone platforms of Grande-Terre's south coast. Tidal relevance on Basse-Terre is mostly current-focused: the Guadeloupe Passage (north, between Guadeloupe and Antigua) and the Dominica Passage (south, between Guadeloupe and Dominica) both produce noticeable current on springs, and offshore dive sites on the exposed coasts can run 1–2 knots on mid-tide. SHOM tables reference Pointe-à-Pitre for the Guadeloupe group, with secondary corrections for Basse-Terre and Deshaies. Open-Meteo Marine data on this site carries the standard ±45-minute timing, ±0.2–0.3 m height accuracy. Divers at the Cousteau Reserve and anglers fishing the offshore slopes off Deshaies should cross-reference SHOM data for current-critical planning.