The Wave
Best with north-northeast offshore flow and south swell.
Rock Island is a Zushi-area reef break that lives in the same marina-and-beach shoreline context as the rest of the Kotsubo coast, with a more exposed reef feel than the nearby harbor edge. Get the latest surfing conditions, forecast, and tide details for Rock Island in Kanagawa and Chiba.
Forecast
As of:
Best with north-northeast offshore flow and south swell.
Tide-wise, the reef is broad enough to stay usable through the cycle, but moving water usually gives the cleanest line.
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.

