First-hand data, observed automatically every morning
Source: this site's automatic 06:00 JST observation of sea conditions at Cape Maeda. Not official data.
Midsummer; highest open rate outside typhoons. Every year is different — check the 7-day forecast on the home page before you go.
| Date | Call | Prob. | Waves | Wind |
|---|---|---|---|---|
| 08/01 | ○ | 95% | 0.2 m | 3 m/s |
| 08/02 | ○ | 95% | 0.2 m | 3 m/s |
| 08/03 | ○ | 87% | 0.5 m | 5 m/s |
| 08/04 | ○ | 84% | 0.7 m | 4 m/s |
| 08/05 | × | 34% | 1.1 m | 5 m/s |
| 08/06 | × | 0% | 2.8 m | 15 m/s |
| 08/07 | × | 0% | 4.2 m | 18 m/s |
| 08/08 | × | 0% | 3.3 m | 19 m/s |
| 08/09 | × | 0% | 2.5 m | 13 m/s |
| 08/10 | × | 26% | 1.5 m | 8 m/s |
| 08/11 | ○ | 76% | 0.9 m | 6 m/s |
| 08/12 | ○ | 86% | 0.9 m | 3 m/s |
| 08/13 | ○ | 79% | 0.8 m | 3 m/s |
| 08/14 | ○ | 80% | 0.7 m | 4 m/s |
| 08/15 | ○ | 93% | 0.6 m | 3 m/s |
| 08/16 | ○ | 88% | 0.6 m | 5 m/s |
| 08/17 | ○ | 84% | 0.6 m | 6 m/s |
| 08/18 | ○ | 73% | 0.8 m | 8 m/s |
| 08/19 | △ | 54% | 1.0 m | 9 m/s |
| 08/20 | ○ | 78% | 0.7 m | 7 m/s |
| 08/21 | × | 36% | 1.3 m | 9 m/s |
| 08/22 | × | 32% | 1.3 m | 9 m/s |
| 08/23 | ○ | 71% | 1.0 m | 6 m/s |
| 08/24 | ○ | 80% | 0.8 m | 6 m/s |
| 08/25 | × | 0% | 3.1 m | 17 m/s |
| 08/26 | × | 0% | 3.6 m | 16 m/s |
| 08/27 | × | 0% | 2.3 m | 7 m/s |
| 08/28 | × | 13% | 1.5 m | 9 m/s |
| 08/29 | △ | 59% | 1.0 m | 9 m/s |
| 08/30 | ○ | 77% | 0.8 m | 7 m/s |
| 08/31 | △ | 69% | 0.9 m | 8 m/s |