Jaco has two main seasons, and each suits a different kind of trip. Understanding them helps you choose dates, budget and activities. In general, the dry season brings reliable sunshine and high prices, while the green season brings lush scenery, lower rates and afternoon showers.
The dry season, December to April
These months are sunny and hot, with little rain, clear skies and strong sunsets. The hills are still green but drier, trails are firmer and rivers are lower, which makes waterfall hikes and ATV rides more comfortable. This is also the busiest and most expensive time, with peak demand around Christmas, New Year and Easter. Book hotels and headline tours early, and expect crowds on the beach and in restaurants.
The green season, May to November
The rains arrive in the afternoon, often as a heavy shower that clears by evening, and the countryside becomes lush. Hotel rates fall, crowds thin and many visitors find the atmosphere more relaxed. Mornings are usually bright, so plan activities early and keep afternoons flexible. September and October are often the wettest months, and some operators may adjust tours in heavy storms, so keep a spare day.
Waves and surf
Jaco's waves are surfable all year, with gentler conditions often found in the dry season and larger swells arriving in the green season. Beginners usually do best when waves are small, so ask your school about conditions. Playa Hermosa works best for experienced surfers, particularly on good swells. Rip currents are a risk in any season, so swim near lifeguards and follow local advice.
Wildlife
Wildlife can be seen in both seasons. Scarlet macaws, monkeys and sloths are present year-round in Carara National Park, and crocodiles are visible on the Tarcoles River in all seasons, with larger gatherings on sandbanks at low water in the dry season. Frogs and insects are most active in the green season, which makes night walks especially rewarding then. Migrating birds add variety at certain times of year.
Waterfalls and hikes
Waterfalls are fuller in the green season, with more dramatic cascades and pools, while the dry season gives safer crossings and firmer trails. Guides adjust routes with the water level, and heavy rain can lead to changes or cancellations. If waterfalls are your priority, the early green season, when the flow has returned but storms are not yet at their peak, can be a good compromise.
Sea trips
Boat trips to Tortuga Island and sunset cruises are most reliable in the dry season, when seas are calm and skies clear. In the green season, trips usually still run, but the sea can be rougher and visibility for snorkeling can change after rain. Check the operator's weather policy and be ready to reschedule.
Prices and crowds
Hotel prices can differ greatly between seasons, and weekends are more expensive than weekdays. If you want a quiet stay and good value, look at the early or late green season, and if you want the most reliable sun, accept higher prices in the dry season. Shoulder weeks at the start and end of the dry season often offer a good balance.
Packing by season
In the dry season, bring sun protection, light clothing and a hat. In the green season, add a light rain jacket, a dry bag and quick-drying clothes. Insect repellent is useful all year. Closed shoes with grip suit hikes in either season, and water shoes are handy for waterfalls.
Choosing your dates
If you want the easiest, sunniest holiday, choose the dry season and book early. If you prefer green hills, fewer people and lower prices, choose the green season and plan around the afternoon rain. Either way, Jaco's mix of beach, wildlife and adventure works all year, and a flexible plan makes the most of every season.
Holidays and events
Christmas, New Year and Easter week are the busiest periods, when Costa Rican families as well as international visitors fill the beaches. Prices rise, traffic builds on the roads to and from San Jose, and tours sell out early. If you can travel outside those windows, you will find a calmer town and easier bookings. Check school holiday dates, since local breaks can also affect crowds, and aim to arrive midweek whenever you can to avoid weekend traffic.
