The Wave
South swell and northeast wind are the clean pair, and the spot only really makes sense when the rivermouth line is organized.
Surf GuideShikoku
Yasuda Rivermouth
Yasuda Rivermouth is one of Kochis Shikoku rivermouth checks, a left-hand reef and river mouth blend that lights up when the south pulse arrives. Get the latest surfing conditions, forecast, and tide details for Yasuda Rivermouth in Shikoku.
Break TypeReef Break
Skill LevelIntermediate
LocationShikoku, JP
Live updates
Spot Guide
Lineup Insights
Lineup Guide
Tide is secondary; so the better reads come from swell shape and the reef line rather than tide timing.
It can get crowded and the rocks matter, so treat it as a river-mouth reef session rather than a casual beach check.
Deep Dive
Get the full picture in WaveWise.
Stop guessing and start surfing. WaveWise analyzes live data to find your best upcoming sessions so you spend less time planning and more time paddling out.
Hourly swells, wind & weather
Live tide windows & daylight
Session Finder ranking
Explore