Tamarindo in June

December through April means guaranteed sunshine and consistent offshore winds that clean up the surf. This is high season, so expect crowds and prices to match. January and February offer the sweet spot: perfect weather without Christmas chaos. March brings the biggest swells of the dry season. But here's what guidebooks won't tell you: early rainy season (May-June) can be magical. Fewer tourists, green landscapes, and afternoon storms that clear quickly. Just avoid September and October when roads wash out and waves disappear. The transition months of November and late April give you decent weather with shoulder season prices.