Take guagua C or F (RD$20) from Puerto Plata. Going back to town take only the C – the F does lots of twists and turns in the city and takes twice as long to get you to the center. It’s a steep downhill walk of about 700m to the main beach area. There’s guagua service until about 7pm. If you’re driving, simply follow the main highway west.
There’s also a taxi stand (US$25 to Puerto Plata and US$100 to the airport) located just outside Lifestyle Holidays.