Comfortable clothing will allow you to blend in with the locals in Puerto Rico

Whatever your plans, comfortable clothing is essential. Lightweight cottons and linens are advisable for day wear while light woolens are suggested for evenings. Try to avoid synthetic fabrics, which may not be as breathable as natural fibers.

Letting the cool Atlantic breeze through your clothing will go a long way toward keeping you comfortable in the tropical temperatures. Additionally, waterproof clothing and rain wear are a necessity all year long. Rain showers in Puerto Rico usually come up suddenly, come down hard, and end fairly quickly, so you need to be prepared with a waterproof jacket or umbrella. Opt for clothing that is easy to carry that you can quickly slip on and then put away again when the sun reappears.

If you're planning on visiting the mountain regions, you'll want to pack a jacket, sweater, or other warm attire, as the altitudes and cool breezes can make the mornings and evenings quite chilly.

Unlike Martinique or Negril, there are no nude beaches or resorts on Puerto Rico, but the island's social climate feels more like Latin America than the United States, so the atmosphere is very laid back. Swim wear is fine for the beach and leisurewear for the resorts, but elsewhere a little dressing up is in order. Nighttime in San Juan is somewhat informal, and nothing too fancy is required unless attending a formal event or dining in an upscale restaurant, but some common-sense clothing choices will keep you appropriate.

If you are traveling to the island for business, lightweight suits are appropriate business attire. The usual Western formalities and courtesies are observed in Puerto Rico.