What weather can I expect in May? DWQA Questions › Category: General Travel Questions › What weather can I expect in May? 0 Vote Up Vote Down giorgie78 asked 7 years ago I am planning my first visit to Costa Rica and would like to spend a week in Tamarindo and surrounding areas and a week in Manuel Antonio. I would like to travel in January or May but would like to know what weather I can expect in May. Thanks!