OSA WEATHER
The Osa Peninsula is quite temperate and rarely experiences extreme high or low temperatures. The temperature seldom drops below 25°C (77°F) in the green season (May to September), and is usually around 30°C (85°F) in the dry season (December to April). October and November are considered the rainiest months (wet season) and because of this travel to and around the Osa can be difficult.
If you’re wondering during which season it’s best to visit, the green season or the dry season, we recommend both for different reasons. In the dry season, there's no rain, which is great if you want to spend most of your time on the beach or escape the snow and cold back home. However, if you are more interested in seeing wildlife, you will enjoy the green season. That’s when the turtles return and red-eye tree frogs are easier to spot. As for the weather during the green season, you can compare it to spring, where mornings are usually sunny with some showers here and there. The great thing about the rain here is that it’s nice and warm and gives you a great excuse to completely rest and relax.