Costa Rica in December: Complete Travel Guide

December in Costa Rica brings a distinct shift in weather patterns, particularly on the Pacific coast. The dry season officially begins in mid-November and is fully established by December, with Guanacaste and the North Pacific experiencing sunny days with little to no rainfall. Temperatures in lowland Pacific zones hover around 28–32°C (82–90°F) during the day, cooling to a comfortable 22–26°C (72–79°F) at night. Beach days are long, sunny, and generally free from the afternoon showers that characterize the rainy months.

The Central Valley around San José also dries out considerably in December, though mornings can be cool (18–22°C / 64–72°F) at the capital's 1,150-meter elevation. The highlands around Monteverde, Cerro de la Muerte, and the Talamanca Range maintain cooler temperatures year-round, with December bringing misty cloud forest conditions and occasional cold-weather gear requirements (temperatures dipping to 10–15°C / 50–59°F at elevation).

The Caribbean coast in December experiences its own distinct pattern — while the Pacific is drying out, the Caribbean side receives increased rainfall driven by trade winds. Tortuguero, Puerto Viejo, and Cahuita can see significant rain in December, though this rarely deters determined Caribbean travelers seeking the region's unique culture and biodiversity. The Caribbean coast's true dry windows fall in September–October and February–April.

Beach activities headline December in Costa Rica, particularly along the Pacific coast. Guanacaste's Playa Conchal, Playa Flamingo, Playa Tamarindo, and the Papagayo Peninsula beaches are at their sunny, calm best. The Pacific swell conditions in December favor bodyboarding and light surfing rather than the powerful waves that define the peak surfing season (May–October). Snorkeling tours to the Catalinas Islands and Bat Islands offer excellent visibility in December's calm, clear water.

December is an excellent month for wildlife excursions across most of Costa Rica. The dry conditions make hiking easier, trails are less muddy, and wildlife concentrates around water sources, making sightings more predictable. December through March is prime quetzal-watching season in the Monteverde highlands and San Gerardo de Dota — the birds are often visible during their breeding season, making this period one of the most sought-after by birding travelers.

Adventure activities across the country are in optimal condition in December. Zip-lining in Monteverde, white-water rafting on the Pacuare and Balsa rivers, and volcano hiking around Arenal and Rincón de la Vieja all operate with minimal weather disruption. Hiking trails in national parks like Manuel Antonio, Corcovado, and Carara are drier and easier to navigate than during the rainy season, though national park reservations should be made well in advance for December visits.

Las Fiestas de Zapote is Costa Rica's most famous December event, held in the San José suburb of Zapote from approximately December 25 through January 5. The festival centers on bullfighting (toro a la tica — in the Costa Rican style, the bull is not harmed), carnival rides, live music, traditional foods, and a general atmosphere of celebration that draws hundreds of thousands of Costa Ricans annually. It is a deeply local tradition and offers a vivid window into Costa Rican popular culture.

Christmas celebrations in Costa Rica are family-centered affairs with religious processions, nativity scenes (pesebres), and community gatherings. Navidad (Christmas) on December 25 is a national holiday, with families gathering for traditional meals featuring rice dishes, tamales (a distinctly Costa Rican holiday food made with corn dough wrapped in plantain leaves), and rompope (an eggnog-like drink). Churches throughout the country hold Misa de Gallo (Christmas midnight mass) on December 24.

New Year's Eve (Fin de Año / Año Nuevo) on December 31 brings fireworks and celebrations across the country. Beach destinations like Tamarindo, Jacó, and Manuel Antonio host outdoor celebrations with live music, fireworks, and countdown festivities that attract both local and international travelers. San José's downtown celebrations and hotel events draw significant crowds. Securing reservations at restaurants and event venues for New Year's Eve well in advance is essential.

December is one of the best months for wildlife watching in Costa Rica, combining the benefits of dry season trail conditions with active wildlife cycles. Leatherback sea turtles begin nesting on Pacific beaches in October and continue through March — Playa Grande in the Las Baulas National Marine Park is the premier leatherback nesting site in the world for this critically endangered species. Night tours with certified guides allow visitors to observe nesting females from careful, designated positions.

Humpback whale watching transitions between populations in December. Southern Hemisphere humpbacks that visit Costa Rica's southern Pacific (Marino Ballena National Park area) from August through October are replaced by North Pacific humpbacks arriving in December. This means whale watching is generally productive from Uvita to Drake Bay through the first months of the year. Boat tours departing from Uvita, Drake Bay, and Dominical regularly encounter these remarkable animals.

The Resplendent Quetzal is at the height of its breeding season from December through April in Costa Rica's highland forests. Cloud forest reserves around Monteverde and the San Gerardo de Dota valley (near the Cerro de la Muerte pass) offer the best accessible quetzal viewing. Early morning guided walks (starting before 6 AM) offer the highest probability of sightings when the birds are most active. December to March is considered the absolute prime window.

Guanacaste is arguably the top December destination in Costa Rica. The North Pacific dry season is in full swing, beach conditions are excellent, and the region's world-class resorts on the Papagayo Peninsula — Four Seasons, Andaz, Secrets, Westin Reserva Conchal — are at peak operation. The variety of beaches from sheltered family-friendly bays to open surf breaks accommodates all traveler types. Proximity to Liberia airport (LIR) with its international connections makes Guanacaste the most logistics-friendly December destination.

Manuel Antonio in December transitions into its peak season with strong beach-and-wildlife combinations. The park's sloths, monkeys, and scarlet macaws are easily spotted along well-maintained trails in December's dry conditions. Quepos town offers a wide range of accommodation, dining, and activity operators. Book Manuel Antonio National Park entry reservations online in advance — the park has daily visitor limits and December is one of the busiest months of the year.

Arenal and La Fortuna work exceptionally well in December for families and adventure travelers. The volcano is more often visible on clear December mornings than during the rainy season, when cloud cover frequently obscures it. Hot springs resorts operate at full capacity with holiday decorations during Christmas season. The hanging bridges, waterfall rappelling, and rafting operations are all running optimally. December mornings are usually clear before any afternoon clouds develop.

Book everything well in advance for December visits to Costa Rica. This cannot be overstated: accommodation, car rentals, domestic flights, national park reservations, and popular restaurant tables fill up months in advance for the Christmas–New Year's period. Properties in Guanacaste, Manuel Antonio, and Arenal may be fully booked by September or October for the peak holiday week. Travelers without confirmed bookings arriving in late December risk severely limited or expensive last-minute options.

Expect higher prices in December compared to the rainy season. Accommodation rates often increase by 30–60% during December compared to October–November rates, with a further premium during Christmas week. Car rentals are in high demand — booking 2–3 months ahead and confirming 4WD availability is advisable. Domestic flight routes to Liberia (LIR), Quepos, and Nosara fill up, so booking air tickets for December travel by October is recommended.

Pack for dry season conditions in Pacific destinations: lightweight clothing, reef-safe sunscreen, sunglasses, and a sun hat are essential. Despite the dry season, a lightweight rain jacket is worth carrying for sudden showers that can still occur. Evening temperatures in beach towns are warm and comfortable. Holiday travelers should also pack extra patience — popular attractions, restaurants, and roads experience significant congestion during Christmas and New Year's week.