May falls within the dry season in Guanacaste, Costa Rica. This period is characterized by sunshine, minimal rainfall, and low humidity, creating ideal beach conditions. Daytime temperatures typically range from the high 80s to low 90s Fahrenheit (low 30s Celsius), while nights offer a comfortable reprieve with temperatures in the mid-70s Fahrenheit (low 20s Celsius).
This predictable weather makes May a popular time to visit the region, allowing for uninterrupted enjoyment of outdoor activities like surfing, swimming, hiking, and wildlife viewing. The lack of rain also contributes to optimal conditions for exploring the region’s diverse ecosystems, from lush dry forests to vibrant coastal areas. Historically, this period of dry weather has significantly influenced agricultural practices and cultural celebrations in Guanacaste.