This is an update to clarify the weather situation in Arenal.  Typically Arenal has good weather all year, but there are times where you can see heavy down pours, however Costa Rica really needs these down pours in Arenal as it put water in the lake which powers the country.  Costa Rica is powered by around 80% renewable energy and the goal is to have it 100% within the next coming years.

Arenal is right in the middle of the country and at an elevation of around 2,000 ft above sea level and receives a mixture of the Pacific and Caribbean weather.  But due to its location and also height sometimes it can be lucky in months such at September /October and receive little rain, where as the majority of the country receives above average rainfall.  There are days where there are light showers and heavy showers but it is not typical for it to rain heavy all day every day, usually it is in bouts.

The best months for Arenal is March and April and then rainfall is pretty much constant for the rest of the year.  If you are doing tours it is always better to do these in the morning just to be sure to miss the afternoon showers.

There are many tours available in Arenal and La Mansion Arenal Hotel offers a wide variety of these.