Rock Island
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.
Live updates:
Lineup Insights
The Wave
Best with north-northeast offshore flow and south swell.
Check the live tide windows in the app to time your session perfectly.
Lineup Guide
Tide-wise, the reef is broad enough to stay usable through the cycle, but moving water usually gives the cleanest line.
Respect the local peak and watch for submerged hazards during lower tidal stages.
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