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.
Peak typhoon month; watch the forecast. Every year is different — check the 7-day forecast on the home page before you go.
| Date | Call | Prob. | Waves | Wind |
|---|---|---|---|---|
| 09/01 | △ | 56% | 1.0 m | 9 m/s |
| 09/02 | △ | 66% | 1.0 m | 8 m/s |
| 09/03 | × | 5% | 1.2 m | 8 m/s |
| 09/04 | × | 36% | 1.4 m | 8 m/s |
| 09/05 | × | 0% | 1.7 m | 7 m/s |
| 09/06 | × | 0% | 1.6 m | 11 m/s |
| 09/07 | × | 0% | 2.1 m | 8 m/s |
| 09/08 | × | 0% | 1.5 m | 8 m/s |
| 09/09 | × | 12% | 1.2 m | 5 m/s |
| 09/10 | △ | 59% | 0.9 m | 3 m/s |
| 09/11 | △ | 49% | 1.0 m | 4 m/s |
| 09/12 | ○ | 78% | 0.7 m | 5 m/s |
| 09/13 | ○ | 72% | 0.7 m | 6 m/s |
| 09/14 | ○ | 86% | 0.6 m | 4 m/s |
| 09/15 | ○ | 90% | 0.6 m | 3 m/s |
| 09/16 | ○ | 84% | 0.7 m | 3 m/s |
| 09/17 | ○ | 85% | 0.7 m | 3 m/s |
| 09/18 | ○ | 93% | 0.5 m | 3 m/s |
| 09/19 | △ | 49% | 0.9 m | 6 m/s |
| 09/20 | × | 31% | 1.1 m | 6 m/s |
| 09/21 | × | 0% | 1.4 m | 6 m/s |
| 09/22 | △ | 55% | 1.0 m | 4 m/s |
| 09/23 | ○ | 88% | 0.6 m | 3 m/s |
| 09/24 | ○ | 95% | 0.5 m | 3 m/s |
| 09/25 | ○ | 95% | 0.4 m | 4 m/s |
| 09/26 | ○ | 87% | 0.5 m | 6 m/s |
| 09/27 | × | 30% | 1.2 m | 11 m/s |
| 09/28 | × | 17% | 1.1 m | 8 m/s |
| 09/29 | ○ | 74% | 0.7 m | 6 m/s |
| 09/30 | ○ | 85% | 0.6 m | 4 m/s |