December thru February is one of RP's best kept secrets, perfect weather, whales / dolphins everywhere, smaller crowds, etc...Its one of my favorite times to be there. My suggestion for Semana Santa roughly April 13-20 is to steer clear of RP unless you like HUGE crowds ( all rooms booked , bars packed , loud music all night, etc ) March thru July is pretty consistently packed in RP & also Oct / Nov.