Wave height, wind, swell and tides for 122 spots in Japan and Korea, rated by surfer level with a BEST TIME. Free, no sign-up.
No. It is wave-model output (ECMWF WAM and MFWAM via Open-Meteo), not an official forecast. Actual sea conditions may differ. Always check on site before deciding to paddle out.
Calculated from wave height, period, wind direction, swell direction and more. Set your surf level on My Page and the rating adapts to that level (the same conditions rate differently for beginners and advanced surfers).
Predicted values from the tide tables published by the Japan Meteorological Agency. Each spot references its nearest station (the station name is shown in the tide section of the spot page).
When a Japan Meteorological Agency alert is detected, a warning banner appears at the top and wave scores are hidden. If the data can't be fetched we never show "safe"; we say plainly that the fetch failed. Always check the official announcements.