La Altagracia

La Altagracia is the easternmost province of the Dominican Republic, the corner of Hispaniola that points into the open Atlantic where the Mona Passage opens between the DR and Puerto Rico. The coast here runs from Cabo Engaño at the eastern tip down through Punta Cana, Bávaro, Cabeza de Toro, and the Cap Cana marina, then south past the resort strip toward La Romana and the offshore islands of Saona and Catalina in the adjacent Parque Nacional Cotubanamá. The tidal regime is mixed semidiurnal and small — mean range across the province sits around 30 to 50 cm, with the two daily highs typically unequal in size and the two lows unequal in depth. That is genuinely small. The tide is real, but it is not the headline. What moves water on La Altagracia's coast is the sustained northeast trade wind, the offshore reef that fronts most of the Punta Cana-Bávaro shoreline, and the seasonal swell that pulses in from the open Atlantic during late autumn and winter. The reef matters: from Cabeza de Toro south through Bávaro and Punta Cana, a near-continuous fringing reef sits a few hundred metres offshore and breaks the bulk of any ocean swell before it reaches the white sand. Inside the reef, the lagoon water is calm and shallow, and the tide signal is what drives the small daily flushing through the reef passes. Outside the reef, the same swell that breaks at the reef edge is unrelated to the tide table. The authoritative regional source is the Servicio Hidrográfico de la Armada Dominicana (the Dominican Navy's hydrographic service), which publishes tide tables for the principal DR ports; NOAA's gauges across the Mona Passage at Mayagüez and at San Juan in Puerto Rico are commonly referenced for the wider regional tidal pattern. For Punta Cana itself, gridded model output is the practical option, and the small range is the honest caveat to keep in mind.