In tropical nations like Costa Rica, there are mainly two seasons, namely the wet and dry seasons.During the dry seasons, you'll get lots of sun, hence it's time to hit the beach. However, there also is a rainy season. How bad is it in Costa Rica, or in this particular case, Guanacaste region in Costa Rica? Someone already asked it in Yahoo! Answers. Check out the answer.
Link: How bad is the "rainy season" in the Guanacaste region (north pacific) of Costa Rica in June? - Yahoo! Answers