Inamuragasaki - surf spot statistics

Inamuragasaki, Japan, offers surfable waves year-round, but conditions vary significantly across seasons. The best months for surfing are typically from September to March, when ground swell contributions are higher (20-29%) compared to wind swell dominance in summer. During this period, mean swell size hovers around 1.2-1.4m, providing more consistent and cleaner waves. September through November stands out as the prime window, with ground swell still present (24-26%) and marginally improved wind conditions (22-25% good winds). Winter months (December-February) bring slightly smaller swells (1.1-1.2m) and the worst onshore winds (bad wind conditions 77-81%), but ground swell remains reliable (22-24%). Summer (May-August) is less ideal, with wind swell dominating (68-89%) and smaller waves (1.2-1.3m), though August sees a temporary ground swell increase (29%). Wind conditions are generally poor year-round (75-83% bad winds), but autumn offers the least unfavorable winds. For advanced surfers, targeting September-November balances decent swell size, manageable winds, and a higher chance of ground swell. Early mornings or offshore wind days are key due to persistent onshore winds.

In February, Inamuragasaki offers surfable conditions with an average swell height of 1.2m and a decent period of 8.4s, indicating generally clean and organized waves. The swell is most frequently ENE (8.62% in the 0.5-1m range) and E (4.86% in the 0.5-1m range), with some larger swells from SW (3.21% in 1-1.5m) and WSW (1.76% in 1.5-2m). The best wave size for surfing (1-2m) occurs often enough to provide good sessions, though bigger days (2m+) are less frequent. Wind conditions are only ideal 19% of the time, with the worst winds coming from the N to NNE (strong 20-50kph gusts). Offshore winds (from land) are rare but can create clean conditions when they align. Expect mostly onshore or cross-shore winds, particularly from the W to NNW, which can create chop. Overall, February is a mixed month—rideable but not consistently epic, with the best days depending on swell direction and wind cooperation. Advanced surfers can find decent waves, especially when ENE swells combine with lighter winds.