While awaiting 'cane season, just to make myself more miserable I checked the f'u'cast for North Costa Rica: http://www.swellinfo.com/surf-forecast/costa-rica-north.html
No doubt. You're right. Was just in Guiones in July, it was clean & green, not quite this big, but what gorgeous waves, whoa. I guess I'll go down to the beach aside the 15th Street pier... work on my rock skipping...