Costa Rica could be considered the adrenalin capital of Latin America, and most of the pulse-raising activities available happen rain or shine. A classic example is white-water rafting; you’re likely to get pretty wet anyway, so a few extra droplets from the sky won’t make a huge difference. To make the most of white-water rafting, go spend time at Pacuare Lodge, an incredible eco-lodge in central rainforest, which most access by the class III/VI rapids of the Pacuare River. Other exciting rivers can be found near to Arenal Volcano, and in Manuel Antonio National Park as well as in other areas. Another activity where rain is no obstacle is surfing, and the shores of both the Pacific and Caribbean coast are lapped by some of the best swells in Latin America. 

The Caribbean coast is home to turtle nesting season from late February through to October. One of the best places for turtle encounters is Tortuguero National Park. April and May is peak season for leatherbacks whereas green turtles are more common during August and September. Hawksbill turtles lay their eggs on both coastlines; their primary home is the reef of Cahuita National Park on the southern Caribbean coast, but can also be found on the Osa Peninsula on the Pacific side. 

Costa Rica also enjoys the longest whale watching season in the world. The mighty humpbacks traverse the globe in their mammoth migration brushing the Pacific coast every year from August to November. Whale watching tours are at their best in Manuel Antonio and the Osa Peninsula. A common misconception is that animals are more difficult to spot during rainy season. Although they look for shelter when it rains, the increased foliage and plant life leads to a higher number of feeding grounds which may actually increase your chances.