| 満潮 | 干潮 | 満潮 | 干潮 |
|
21
(日) |
03:26 | 07:47 | 13:06 | 20:18 |
| 15cm | 12cm | 18cm | 1cm | |
|
||||
留萌（北海道）2028年05月21日の10分毎の潮の高低差を確認できます。
また1日の潮の高低差が1番大きい（潮の流れが大きい）時間に「最大潮位差」と明記してます。
| 時刻 | 潮位 | 高低差 | 各ポイント |
|---|---|---|---|
| 5/21 00:00 | 10.0 | ↑0.4 | |
| 5/21 00:10 | 10.5 | ↑0.5 | |
| 5/21 00:20 | 10.9 | ↑0.4 | |
| 5/21 00:30 | 11.3 | ↑0.4 | |
| 5/21 00:40 | 11.7 | ↑0.4 | |
| 5/21 00:50 | 12.1 | ↑0.4 | |
| 5/21 01:00 | 12.4 | ↑0.3 | |
| 5/21 01:10 | 12.7 | ↑0.3 | |
| 5/21 01:20 | 13.0 | ↑0.3 | |
| 5/21 01:30 | 13.2 | ↑0.2 | |
| 5/21 01:40 | 13.5 | ↑0.3 | |
| 5/21 01:50 | 13.6 | ↑0.1 | |
| 5/21 02:00 | 13.8 | ↑0.2 | |
| 5/21 02:10 | 14.0 | ↑0.2 | |
| 5/21 02:20 | 14.1 | ↑0.1 | |
| 5/21 02:30 | 14.2 | ↑0.1 | |
| 5/21 02:40 | 14.2 | 0 | |
| 5/21 02:50 | 14.3 | ↑0.1 | |
| 5/21 03:00 | 14.4 | ↑0.1 | |
| 5/21 03:10 | 14.4 | 0 | |
| 5/21 03:20 | 14.4 | 0 | 満潮 |
| 5/21 03:30 | 14.4 | 0 | |
| 5/21 03:40 | 14.4 | 0 | |
| 5/21 03:50 | 14.4 | 0 | |
| 5/21 04:00 | 14.3 | ↓-0.1 | |
| 5/21 04:10 | 14.3 | 0 | |
| 5/21 04:20 | 14.2 | ↓-0.1 | |
| 5/21 04:30 | 14.1 | ↓-0.1 | |
| 5/21 04:40 | 14.0 | ↓-0.1 | |
| 5/21 04:50 | 13.9 | ↓-0.1 | |
| 5/21 05:00 | 13.7 | ↓-0.2 | |
| 5/21 05:10 | 13.6 | ↓-0.1 | |
| 5/21 05:20 | 13.4 | ↓-0.2 | |
| 5/21 05:30 | 13.3 | ↓-0.1 | |
| 5/21 05:40 | 13.1 | ↓-0.2 | |
| 5/21 05:50 | 12.9 | ↓-0.2 | |
| 5/21 06:00 | 12.8 | ↓-0.1 | |
| 5/21 06:10 | 12.6 | ↓-0.2 | |
| 5/21 06:20 | 12.5 | ↓-0.1 | |
| 5/21 06:30 | 12.3 | ↓-0.2 | |
| 5/21 06:40 | 12.2 | ↓-0.1 | |
| 5/21 06:50 | 12.0 | ↓-0.2 | |
| 5/21 07:00 | 11.9 | ↓-0.1 | |
| 5/21 07:10 | 11.8 | ↓-0.1 | |
| 5/21 07:20 | 11.8 | 0 | |
| 5/21 07:30 | 11.7 | ↓-0.1 | |
| 5/21 07:40 | 11.7 | 0 | 干潮 |
| 5/21 07:50 | 11.7 | 0 | |
| 5/21 08:00 | 11.7 | 0 | |
| 5/21 08:10 | 11.8 | ↑0.1 | |
| 5/21 08:20 | 11.8 | 0 | |
| 5/21 08:30 | 11.9 | ↑0.1 | |
| 5/21 08:40 | 12.0 | ↑0.1 | |
| 5/21 08:50 | 12.1 | ↑0.1 | |
| 5/21 09:00 | 12.3 | ↑0.2 | |
| 5/21 09:10 | 12.4 | ↑0.1 | |
| 5/21 09:20 | 12.6 | ↑0.2 | |
| 5/21 09:30 | 12.7 | ↑0.1 | |
| 5/21 09:40 | 12.9 | ↑0.2 | |
| 5/21 09:50 | 13.1 | ↑0.2 | |
| 5/21 10:00 | 13.3 | ↑0.2 | |
| 5/21 10:10 | 13.6 | ↑0.3 | |
| 5/21 10:20 | 13.8 | ↑0.2 | |
| 5/21 10:30 | 14.0 | ↑0.2 | |
| 5/21 10:40 | 14.3 | ↑0.3 | |
| 5/21 10:50 | 14.6 | ↑0.3 | |
| 5/21 11:00 | 14.8 | ↑0.2 | |
| 5/21 11:10 | 15.1 | ↑0.3 | |
| 5/21 11:20 | 15.4 | ↑0.3 | |
| 5/21 11:30 | 15.6 | ↑0.2 | |
| 5/21 11:40 | 15.9 | ↑0.3 | |
| 5/21 11:50 | 16.1 | ↑0.2 | |
| 5/21 12:00 | 16.4 | ↑0.3 | |
| 5/21 12:10 | 16.6 | ↑0.2 | |
| 5/21 12:20 | 16.8 | ↑0.2 | |
| 5/21 12:30 | 16.9 | ↑0.1 | |
| 5/21 12:40 | 17.0 | ↑0.1 | |
| 5/21 12:50 | 17.1 | ↑0.1 | |
| 5/21 13:00 | 17.2 | ↑0.1 | 満潮 |
| 5/21 13:10 | 17.2 | 0 | |
| 5/21 13:20 | 17.1 | ↓-0.1 | |
| 5/21 13:30 | 17.0 | ↓-0.1 | |
| 5/21 13:40 | 16.9 | ↓-0.1 | |
| 5/21 13:50 | 16.7 | ↓-0.2 | |
| 5/21 14:00 | 16.5 | ↓-0.2 | |
| 5/21 14:10 | 16.2 | ↓-0.3 | |
| 5/21 14:20 | 15.9 | ↓-0.3 | |
| 5/21 14:30 | 15.5 | ↓-0.4 | |
| 5/21 14:40 | 15.2 | ↓-0.3 | |
| 5/21 14:50 | 14.7 | ↓-0.5 | |
| 5/21 15:00 | 14.3 | ↓-0.4 | |
| 5/21 15:10 | 13.8 | ↓-0.5 | |
| 5/21 15:20 | 13.3 | ↓-0.5 | |
| 5/21 15:30 | 12.8 | ↓-0.5 | |
| 5/21 15:40 | 12.3 | ↓-0.5 | |
| 5/21 15:50 | 11.7 | ↓-0.6 | 最大潮位差 |
| 5/21 16:00 | 11.2 | ↓-0.5 | |
| 5/21 16:10 | 10.6 | ↓-0.6 | 最大潮位差 |
| 5/21 16:20 | 10.0 | ↓-0.6 | 最大潮位差 |
| 5/21 16:30 | 9.4 | ↓-0.6 | 最大潮位差 |
| 5/21 16:40 | 8.9 | ↓-0.5 | |
| 5/21 16:50 | 8.3 | ↓-0.6 | 最大潮位差 |
| 5/21 17:00 | 7.7 | ↓-0.6 | 最大潮位差 |
| 5/21 17:10 | 7.1 | ↓-0.6 | 最大潮位差 |
| 5/21 17:20 | 6.5 | ↓-0.6 | 最大潮位差 |
| 5/21 17:30 | 5.9 | ↓-0.6 | 最大潮位差 |
| 5/21 17:40 | 5.3 | ↓-0.6 | 最大潮位差 |
| 5/21 17:50 | 4.7 | ↓-0.6 | 最大潮位差 |
| 5/21 18:00 | 4.2 | ↓-0.5 | |
| 5/21 18:10 | 3.7 | ↓-0.5 | |
| 5/21 18:20 | 3.2 | ↓-0.5 | |
| 5/21 18:30 | 2.7 | ↓-0.5 | |
| 5/21 18:40 | 2.2 | ↓-0.5 | |
| 5/21 18:50 | 1.8 | ↓-0.4 | |
| 5/21 19:00 | 1.4 | ↓-0.4 | |
| 5/21 19:10 | 1.1 | ↓-0.3 | |
| 5/21 19:20 | 0.8 | ↓-0.3 | |
| 5/21 19:30 | 0.6 | ↓-0.2 | |
| 5/21 19:40 | 0.4 | ↓-0.2 | |
| 5/21 19:50 | 0.2 | ↓-0.2 | |
| 5/21 20:00 | 0.1 | ↓-0.1 | |
| 5/21 20:10 | 0.1 | 0 | 干潮 |
| 5/21 20:20 | 0.1 | 0 | |
| 5/21 20:30 | 0.1 | 0 | |
| 5/21 20:40 | 0.2 | ↑0.1 | |
| 5/21 20:50 | 0.3 | ↑0.1 | |
| 5/21 21:00 | 0.5 | ↑0.2 | |
| 5/21 21:10 | 0.6 | ↑0.1 | |
| 5/21 21:20 | 0.9 | ↑0.3 | |
| 5/21 21:30 | 1.1 | ↑0.2 | |
| 5/21 21:40 | 1.4 | ↑0.3 | |
| 5/21 21:50 | 1.8 | ↑0.4 | |
| 5/21 22:00 | 2.1 | ↑0.3 | |
| 5/21 22:10 | 2.5 | ↑0.4 | |
| 5/21 22:20 | 2.9 | ↑0.4 | |
| 5/21 22:30 | 3.4 | ↑0.5 | |
| 5/21 22:40 | 3.9 | ↑0.5 | |
| 5/21 22:50 | 4.4 | ↑0.5 | |
| 5/21 23:00 | 4.9 | ↑0.5 | |
| 5/21 23:10 | 5.4 | ↑0.5 | |
| 5/21 23:20 | 6.0 | ↑0.6 | 最大潮位差 |
| 5/21 23:30 | 6.6 | ↑0.6 | 最大潮位差 |
| 5/21 23:40 | 7.2 | ↑0.6 | 最大潮位差 |
| 5/21 23:50 | 7.8 | ↑0.6 | 最大潮位差 |