There is another alert out for high seas for the weekend. The big waves are accompanied by high winds.
The national emergency commission joined with the University de Costa Rica experts in issuing the warning. The summary cited high pressure in the North Atlantic and over North America for generating the heavy seas.
In the north Pacific of Guanacaste, the waves are expected to reach four meters by Sunday, said the summary. And wind gusts were predicted to be at least 75 kph or about 47 mph.
The university experts are from its Centro de Investigación en Ciencias del Mar y Limnología.
The size of the waves are diminishing further south on the Pacific coast, but the winds were predicted to continue to be strong.
On the Caribbean coast the waves are expected to range as high a 2.5 meters and begin to return to normal by Monday.
The winds were expected to be weak.
There were small boat warnings issued for both coasts.