First-hand data, observed automatically every morning
Statistics for this month are still accumulating (this site has logged every day since August 2026). Open rate and average wave height will appear here once data exists.
Source: this site's automatic 06:00 JST observation of sea conditions at Cape Maeda. Not official data.
Winter monsoon; more closed days. Every year is different — check the 7-day forecast on the home page before you go.