Ikumi - surf spot statistics

Ikumi, Japan, offers varying surf conditions throughout the year, with the best swells typically arriving between March and September. The spot relies heavily on wind swells, which dominate from February to October, peaking between April and August with consistency above 60%. Ground swells, while less frequent, become more prominent from July to September, reaching their highest probability (27-28%) in August and September. The mean swell size is modest, generally ranging from 0.6m in winter to 1.3m in summer, with the largest waves occurring in August (1.3m). Wind conditions are critical here, as unfavorable onshore winds plague much of the year, particularly from October to March when bad wind conditions exceed 79%. The best balance of swell and wind occurs from May to August, when wind quality improves slightly (34-44% good winds), though even then, bad winds remain prevalent (56-66%). July and August stand out as the prime months, offering the highest ground swell contribution, decent wind swell consistency, and the most favorable wind conditions of the year. September still holds decent swell but sees a sharp decline in wind quality. Winter months (December-February) are less reliable, with smaller swells and consistently poor winds. For experienced surfers, late summer (July-August) is the optimal window, while intermediate surfers may find late spring (May-June) more manageable with slightly smaller but consistent swells.