21 (月)	01:42	02:42	10:25	18:23
	57cm	57cm	81cm	30cm
長潮 出 04:28 入 18:13 出 02:06 入 12:41

コイセボイ（北海道）2036年04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
4/21 00:00	55.2	↑0.3
4/21 00:10	55.5	↑0.3
4/21 00:20	55.8	↑0.3
4/21 00:30	56.0	↑0.2
4/21 00:40	56.1	↑0.1
4/21 00:50	56.3	↑0.2
4/21 01:00	56.4	↑0.1
4/21 01:10	56.4	0
4/21 01:20	56.5	↑0.1
4/21 01:30	56.5	0
4/21 01:40	56.5	0	満潮
4/21 01:50	56.5	0
4/21 02:00	56.5	0
4/21 02:10	56.5	0
4/21 02:20	56.5	0
4/21 02:30	56.4	↓-0.1
4/21 02:40	56.4	0	干潮
4/21 02:50	56.4	0
4/21 03:00	56.5	↑0.1
4/21 03:10	56.5	0
4/21 03:20	56.6	↑0.1
4/21 03:30	56.7	↑0.1
4/21 03:40	56.8	↑0.1
4/21 03:50	56.9	↑0.1
4/21 04:00	57.1	↑0.2
4/21 04:10	57.4	↑0.3
4/21 04:20	57.6	↑0.2
4/21 04:30	57.9	↑0.3
4/21 04:40	58.3	↑0.4
4/21 04:50	58.7	↑0.4
4/21 05:00	59.1	↑0.4
4/21 05:10	59.6	↑0.5
4/21 05:20	60.2	↑0.6
4/21 05:30	60.7	↑0.5
4/21 05:40	61.4	↑0.7
4/21 05:50	62.0	↑0.6
4/21 06:00	62.7	↑0.7
4/21 06:10	63.5	↑0.8
4/21 06:20	64.2	↑0.7
4/21 06:30	65.0	↑0.8
4/21 06:40	65.8	↑0.8
4/21 06:50	66.7	↑0.9
4/21 07:00	67.5	↑0.8
4/21 07:10	68.4	↑0.9
4/21 07:20	69.3	↑0.9
4/21 07:30	70.2	↑0.9
4/21 07:40	71.1	↑0.9
4/21 07:50	71.9	↑0.8
4/21 08:00	72.8	↑0.9
4/21 08:10	73.6	↑0.8
4/21 08:20	74.4	↑0.8
4/21 08:30	75.2	↑0.8
4/21 08:40	75.9	↑0.7
4/21 08:50	76.6	↑0.7
4/21 09:00	77.3	↑0.7
4/21 09:10	77.9	↑0.6
4/21 09:20	78.4	↑0.5
4/21 09:30	78.9	↑0.5
4/21 09:40	79.3	↑0.4
4/21 09:50	79.6	↑0.3
4/21 10:00	79.9	↑0.3
4/21 10:10	80.0	↑0.1
4/21 10:20	80.1	↑0.1	満潮
4/21 10:30	80.1	0
4/21 10:40	80.0	↓-0.1
4/21 10:50	79.8	↓-0.2
4/21 11:00	79.5	↓-0.3
4/21 11:10	79.1	↓-0.4
4/21 11:20	78.6	↓-0.5
4/21 11:30	78.1	↓-0.5
4/21 11:40	77.4	↓-0.7
4/21 11:50	76.6	↓-0.8
4/21 12:00	75.8	↓-0.8
4/21 12:10	74.8	↓-1.0
4/21 12:20	73.8	↓-1.0
4/21 12:30	72.7	↓-1.1
4/21 12:40	71.5	↓-1.2
4/21 12:50	70.2	↓-1.3
4/21 13:00	68.9	↓-1.3
4/21 13:10	67.5	↓-1.4
4/21 13:20	66.0	↓-1.5
4/21 13:30	64.5	↓-1.5
4/21 13:40	62.9	↓-1.6
4/21 13:50	61.3	↓-1.6
4/21 14:00	59.7	↓-1.6
4/21 14:10	58.0	↓-1.7	最大潮位差
4/21 14:20	56.4	↓-1.6
4/21 14:30	54.7	↓-1.7	最大潮位差
4/21 14:40	53.0	↓-1.7	最大潮位差
4/21 14:50	51.3	↓-1.7	最大潮位差
4/21 15:00	49.7	↓-1.6
4/21 15:10	48.0	↓-1.7	最大潮位差
4/21 15:20	46.4	↓-1.6
4/21 15:30	44.8	↓-1.6
4/21 15:40	43.3	↓-1.5
4/21 15:50	41.9	↓-1.4
4/21 16:00	40.4	↓-1.5
4/21 16:10	39.1	↓-1.3
4/21 16:20	37.8	↓-1.3
4/21 16:30	36.6	↓-1.2
4/21 16:40	35.5	↓-1.1
4/21 16:50	34.5	↓-1.0
4/21 17:00	33.6	↓-0.9
4/21 17:10	32.8	↓-0.8
4/21 17:20	32.1	↓-0.7
4/21 17:30	31.4	↓-0.7
4/21 17:40	30.9	↓-0.5
4/21 17:50	30.5	↓-0.4
4/21 18:00	30.2	↓-0.3
4/21 18:10	30.1	↓-0.1
4/21 18:20	30.0	↓-0.1	干潮
4/21 18:30	30.0	0
4/21 18:40	30.2	↑0.2
4/21 18:50	30.4	↑0.2
4/21 19:00	30.7	↑0.3
4/21 19:10	31.2	↑0.5
4/21 19:20	31.7	↑0.5
4/21 19:30	32.4	↑0.7
4/21 19:40	33.1	↑0.7
4/21 19:50	33.9	↑0.8
4/21 20:00	34.7	↑0.8
4/21 20:10	35.7	↑1.0
4/21 20:20	36.7	↑1.0
4/21 20:30	37.7	↑1.0
4/21 20:40	38.8	↑1.1
4/21 20:50	40.0	↑1.2
4/21 21:00	41.1	↑1.1
4/21 21:10	42.3	↑1.2
4/21 21:20	43.5	↑1.2
4/21 21:30	44.7	↑1.2
4/21 21:40	45.9	↑1.2
4/21 21:50	47.2	↑1.3
4/21 22:00	48.3	↑1.1
4/21 22:10	49.5	↑1.2
4/21 22:20	50.7	↑1.2
4/21 22:30	51.8	↑1.1
4/21 22:40	52.8	↑1.0
4/21 22:50	53.8	↑1.0
4/21 23:00	54.8	↑1.0
4/21 23:10	55.7	↑0.9
4/21 23:20	56.5	↑0.8
4/21 23:30	57.3	↑0.8
4/21 23:40	58.0	↑0.7
4/21 23:50	58.6	↑0.6