My husband and I are avid long distance hikers and would love to hike the Camino de Costa Rica. As teachers, our main holidays fall mid December-mid January (3 weeks) and during the summer time (late June-early/mid August (6-7 weeks). However, we would like to hike this trail when the weather is most advantageous for us so are flexible to wait and complete the trip at a later date. Which time of year (months) are optimal? Having hiked the length of South Korea (nearly 800km) this summer is 40+C weather made for some early mornings on the trail and long afternoons napping and swimming. However, we would rather not feel as though we are 'racing the sun' and isntead enjoy the beauty of Costa Rica as we complete this 15 day trek.
Emma
If you get a chance you shoukd get the recently published guide book on Amazon https://www.amazon.com/-/es/Evan-Brashier/dp/1737139308
This group of young Costa Ricans offers small group expeditions you could consider getting an itinerary from them and seeing if that works for you. They know all the cool things along the route to interact with local people and have great experiences.
I would say you could do it in their 11 day offers.