Carrownisky, Ireland, offers consistent surf year-round, but the best conditions for experienced surfers are primarily during the winter months. From November to February, ground swell dominates (72-87%) with mean swell sizes ranging from 1.9m to 2.3m, providing powerful, clean waves. However, wind conditions are challenging during this period, with bad onshore winds occurring 87-91% of the time, meaning sessions are best timed around rare offshore or light wind windows (only 9-13% good wind days). March and October offer slightly more manageable winds (13-14% good days) while still maintaining decent ground swell influence (56-76%) and mean swell heights around 1.6-1.9m, making them potential sweet spots for those seeking a balance between wave quality and wind. The summer months (April-September) see a significant drop in ground swell (12-55%) as wind swell takes over (49-73%), resulting in smaller, less consistent waves (1.0-1.3m). Wind conditions remain poor (82-89% bad winds), further limiting surf potential. Overall, committed surfers will find the biggest and cleanest waves in peak winter despite the predominant onshore winds, while shoulder months like March and October may provide occasional high-quality sessions with slightly better wind odds.