Puerto Plata: Weather Forecast. The warmest day over the next 7 days in Puerto Plata is forecast to be 24th April at 30Â°C (86Â°F) and the warmest night on 21st April at 22Â°C (72Â°F). The average temperature over the next 7 days is forecast to be 29Â°C (84Â°F) and there will be 1 day of sunshine . The average for April is 24Â°C (75Â°F) in Puerto Plata.