From Tomari Port, Naha · updated every morning
This is a forecast based on sea conditions, not an official notice. Partial cancellations become likely from about 2.3 m of swell; above 3 m most sailings are cancelled. Always check the operator before you travel.
Naha (Tomari Port) → Kume Island: about 3–4 hours by ferry (Kume Line; some sailings call at Tonaki). Open-sea route — northerlies and swell cause frequent cancellations.
| 2 | 3 | 4 | 5 | 6 | 7 | 8 |
|---|---|---|---|---|---|---|
| △ 49% | △ 53% | ○ 88% | × 0% | × 0% | × 0% | × 0% |
| Month | Days | Cancel-risk days (×) | Partial (△) | Avg waves |
|---|---|---|---|---|
| Oct 2026 | 2 | 0% | 0% | 0.9 m |
| Sep 2026 | 30 | 7% | 7% | 1.6 m |
| Aug 2026 | 31 | 26% | 16% | 2.2 m |
| Jul 2026 | 4 | 0% | 0% | 0.6 m |
Last 30 days：
This site's own 06:00 JST daily record of route conditions — not the operator's actual cancellation record.