Guanacaste is one of Costa Rica’s most popular destinations, particularly known for its beaches, natural landscapes, and sunny weather. However, weather conditions in this province change considerably throughout the year, creating two distinct seasons: the dry season and the green season.

The dry season generally runs from December to April, while the green season lasts from May through November. Each offers a different experience for visitors exploring the region, so it is worth considering the weather conditions when planning a trip.

Dry Season: Sunshine and Beaches in Guanacaste

From December to April, Guanacaste experiences its driest months, with plenty of sunshine and little rainfall, particularly in January, February, and March. These conditions are ideal for visiting beaches such as Tamarindo, Playa Avellanas, and Playa Langosta, as well as enjoying excursions and outdoor activities.

Thanks to the favorable weather, this period also coincides with the peak tourist season. Accommodation and other services may be more expensive, so booking in advance is recommended, especially around Christmas, New Year’s, and Easter Week.

Green Season: Lush Landscapes and Fewer Crowds

From May to November, rainfall transforms the landscape. Forests become green again, the surrounding countryside takes on vibrant shades of green, and nature becomes an even greater part of the experience. During May, June, and November, rainy periods often alternate with sunny mornings, allowing visitors to make the most of the day by heading to the beaches and enjoying excursions. July and August can also be good months to visit, although weather conditions tend to be more variable.

September and October, on the other hand, are usually the rainiest months in the province. For this reason, they are less suitable for travelers planning a vacation focused primarily on beach activities.

When Does the Dry Season Begin in Guanacaste in 2026?

According to forecasts from Costa Rica’s National Meteorological Institute (IMN), the 2026–2027 dry season is expected to begin setting in across the North Pacific region during the week of November 9–15. This includes Guanacaste, where a significant decrease in rainfall is expected.

However, the transition will be gradual, meaning that rainfall will not disappear overnight. Rain showers may still occur throughout November due to atmospheric systems and weather patterns associated with the seasonal transition. By late November and early December, increasingly dry conditions are expected across the North Pacific, marking the beginning of the province’s sunnier months.

When Is the Best Time to Visit Guanacaste?

The best time to visit depends on the kind of experience you are looking for. From December to April, weather conditions are generally ideal for enjoying the beaches and outdoor activities, although these months also bring larger crowds and higher prices.

May, June, and November, meanwhile, are interesting alternatives for travelers who prefer fewer crowds and want to experience Guanacaste’s lush green landscapes. If spending time at the beach is the main priority, September and October require more careful consideration because of the heavier rainfall.

Ultimately, Guanacaste has something to offer throughout the year. Understanding the characteristics of each season makes it easier to choose the right time to discover its beaches, explore its landscapes, and experience the natural beauty of this Costa Rican province.

Sensorial Sunsets