From http://www.wetsand.com/wavecast/wc-costa-rica.asp
Saturday the 21st the short-period swell is expected to completely diminish, just in time for some long-period (16-second) ground swell to arrive from activity that originated near the Tasman Sea. This is looking like a head high swell for breaks with decent southerly exposure, 2-3 feet overhead for breaks facing directly to the south. This swell should fill into most all south-facing breaks in the Central American region. Note that the Nicaragua region may still be recuperating from wind swell early in the day on the 21st.
Sunday the 22nd the SW should level off with shoulder to head high surf for most south facing breaks, still overhead at the standouts.
Our next SW swell is due on the 24th, although this is looking smaller. It’s another southern hemi system, but this one didn’t have as much oomph as its predecessors. Still, by the looks of things today, this should bring in at least some chest high + surf from around 190-200 degrees, angled best at Panama; Costa Rica and regions further to the north may not see as much energy.
This particular swell should diminish around the 26th, and it looks like we may hit a temporary lull as the models are calling for quietness in the southern hemisphere for at least a little while.