In terms of precipitation, rainfall in Tamarindo ranges from 0.1 - 14.1 inches per month. September is typically the wettest month, when rainfall can reach 14.1 in. February is typically the driest time to visit Tamarindo when rainfall is around 0.1 in.
If weather is an important factor for your trip to Tamarindo, use this chart to help with planning. For those seeking warmer temperatures, March is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of September, when temperatures are typically at their lowest (around 78.8 F).