While most of the world is wrapping up in coats, Puerto Rico is basking in warm sunshine. December is one of the best months to visit this Caribbean island. The weather is comfortable, the skies are clear, and the whole island is buzzing with festive energy.

If you are planning a December trip, here is everything you need to know about what to expect.

What Are the Average Temperatures in December?

Puerto Rico enjoys a warm tropical climate all year round. December sits right at the sweet spot — warm enough for the beach, cool enough to stay comfortable.

Here is a simple breakdown of typical December temperatures:

• Daytime highs: Around 83°F to 85°F (28°C to 29°C)
• Night-time lows: Around 70°F to 73°F (21°C to 23°C)
• Ocean water temperature: Around 80°F to 82°F (27°C to 28°C)
• Average daily sunshine: Approximately 11 hours
• Humidity: Moderate — lower than summer months, making it feel comfortable

These are averages for coastal areas like San Juan and Isla Verde. The island’s mountainous central highlands can be cooler, sometimes dropping to around 60°F (15°C) in the evenings. If you plan to hike in the interior, pack a light layer.

Is December a Dry Month in Puerto Rico?

Yes. December marks the start of Puerto Rico’s dry season. The Atlantic hurricane season officially ends in late November. By December, rainfall decreases noticeably and the skies clear up beautifully.

What this means for travellers:

• Fewer rainy days compared to summer and early autumn
• Shorter and lighter showers when rain does fall
• More sunshine hours and cleaner blue skies
• Lower humidity levels across the island
• Better conditions for outdoor activities and beach days

The northern part of the island, including areas near El Yunque National Forest, can still see the occasional brief shower. The southern coast — places like Ponce and Cabo Rojo — tends to stay sunnier and drier. If you want maximum dry weather, head south.

Regional Temperature Differences to Know

Puerto Rico is a small island but it has real climate variation. Where you stay matters.

• San Juan and the North Coast — warm and breezy, with the occasional light shower. Temperatures hover around 82°F to 85°F during the day
• Ponce and the South Coast — slightly drier and hotter, often the sunniest part of the island in December
• El Yunque and the East — lush and green for a reason. Expect more tropical moisture and brief afternoon showers
• The Central Mountains — cooler evenings and mornings. A jacket is useful here, especially after sunset
• Vieques and Culebra — small islands off the east coast, warm and beautiful, with calm seas perfect for snorkelling

What to Wear in Puerto Rico in December

Leave the heavy coats at home. December in Puerto Rico calls for light, breathable clothing.

Daytime outfits:

• Lightweight T-shirts, tank tops, and shorts
• Sundresses, linen trousers, or breathable fabrics
• Comfortable sandals or flip flops for the beach and boardwalk

Evening and indoor wear:

• A light cardigan or long-sleeved shirt for air-conditioned restaurants
• A light jacket for cooler mountain evenings
• Comfortable walking shoes for exploring Old San Juan

Sun and sea essentials:

• High-SPF broad-spectrum sunscreen — the UV index is still around 6 in December
• Reef-safe sunscreen if you plan to snorkel in protected marine areas
• Wide-brim hat and UV-protection sunglasses
• Rash guard for extended time in the water

Is December a Good Time to Visit Puerto Rico?

Without question, yes. December is widely considered one of the best times to visit the island. Here is why:

• The hurricane season is over, so travel is safer and more predictable
• Beach and water conditions are ideal for swimming, snorkelling, and water sports
• The festive holiday season transforms the island into a celebration
• Lower humidity makes outdoor activities more enjoyable
• Ocean temperatures remain warm and inviting throughout the month

One thing to keep in mind: December is peak tourist season. Mid to late December, especially around Christmas and New Year, sees larger crowds and higher prices for flights and hotels. Book accommodation and tours early if you are visiting during the holidays.

What to Do in Puerto Rico in December

The warm December weather opens up the whole island for exploration. Here are the top experiences to enjoy:

Beach and water activities:

• Swim and snorkel at Flamenco Beach, Condado, or Isla Verde
• Take a catamaran tour to the small islands of Vieques or Culebra
• Kayak through the bioluminescent bay at Fajardo — an unforgettable night experience
• Try surfing along the northwest coast near Rincon, where December swells are ideal

Culture and food:

• Stroll through Old San Juan and enjoy the Christmas light displays
• Taste coquito (Puerto Rico’s beloved coconut and rum drink)
• Join a parranda — a traditional Christmas caroling celebration unique to Puerto Rico
• Try lechón asado (roasted pork) at the famous lechoneras along Route 184 in Cayey

Nature and adventure:

• Hike the trails of El Yunque National Forest after brief morning showers clear the air
• Visit El Morro fortress in Old San Juan for sweeping coastal views
• Explore Cabo Rojo’s dramatic cliffs and salt flats on the southwest coast

Quick Tips for Visiting in December

Before you book, keep these practical points in mind:

• Book early
• Carry reef-safe sunscreen
• Expect holiday traffic
• Bring cash for smaller vendors
• Pack light layers for evenings