20 (月)	01:26	07:15	13:35	19:50
	70cm	37cm	80cm	36cm
中潮 出 04:30 入 18:12 出 15:55 入 03:34

コイセボイ（北海道）2054年04月20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
4/20 00:00	64.8	↑1.1
4/20 00:10	65.7	↑0.9
4/20 00:20	66.6	↑0.9
4/20 00:30	67.4	↑0.8
4/20 00:40	68.0	↑0.6
4/20 00:50	68.5	↑0.5
4/20 01:00	68.9	↑0.4
4/20 01:10	69.1	↑0.2
4/20 01:20	69.3	↑0.2	満潮
4/20 01:30	69.3	0
4/20 01:40	69.2	↓-0.1
4/20 01:50	68.9	↓-0.3
4/20 02:00	68.5	↓-0.4
4/20 02:10	68.0	↓-0.5
4/20 02:20	67.4	↓-0.6
4/20 02:30	66.6	↓-0.8
4/20 02:40	65.8	↓-0.8
4/20 02:50	64.8	↓-1.0
4/20 03:00	63.8	↓-1.0
4/20 03:10	62.7	↓-1.1
4/20 03:20	61.5	↓-1.2
4/20 03:30	60.2	↓-1.3
4/20 03:40	58.9	↓-1.3
4/20 03:50	57.5	↓-1.4
4/20 04:00	56.1	↓-1.4
4/20 04:10	54.7	↓-1.4
4/20 04:20	53.2	↓-1.5
4/20 04:30	51.8	↓-1.4
4/20 04:40	50.3	↓-1.5
4/20 04:50	48.9	↓-1.4
4/20 05:00	47.5	↓-1.4
4/20 05:10	46.2	↓-1.3
4/20 05:20	44.9	↓-1.3
4/20 05:30	43.7	↓-1.2
4/20 05:40	42.5	↓-1.2
4/20 05:50	41.4	↓-1.1
4/20 06:00	40.5	↓-0.9
4/20 06:10	39.6	↓-0.9
4/20 06:20	38.9	↓-0.7
4/20 06:30	38.2	↓-0.7
4/20 06:40	37.7	↓-0.5
4/20 06:50	37.3	↓-0.4
4/20 07:00	37.1	↓-0.2
4/20 07:10	36.9	↓-0.2	干潮
4/20 07:20	36.9	0
4/20 07:30	37.1	↑0.2
4/20 07:40	37.4	↑0.3
4/20 07:50	37.8	↑0.4
4/20 08:00	38.4	↑0.6
4/20 08:10	39.1	↑0.7
4/20 08:20	39.9	↑0.8
4/20 08:30	40.9	↑1.0
4/20 08:40	41.9	↑1.0
4/20 08:50	43.1	↑1.2
4/20 09:00	44.4	↑1.3
4/20 09:10	45.8	↑1.4
4/20 09:20	47.3	↑1.5
4/20 09:30	48.8	↑1.5
4/20 09:40	50.5	↑1.7
4/20 09:50	52.1	↑1.6
4/20 10:00	53.8	↑1.7
4/20 10:10	55.6	↑1.8
4/20 10:20	57.4	↑1.8
4/20 10:30	59.2	↑1.8
4/20 10:40	60.9	↑1.7
4/20 10:50	62.7	↑1.8
4/20 11:00	64.4	↑1.7
4/20 11:10	66.1	↑1.7
4/20 11:20	67.8	↑1.7
4/20 11:30	69.4	↑1.6
4/20 11:40	70.9	↑1.5
4/20 11:50	72.3	↑1.4
4/20 12:00	73.6	↑1.3
4/20 12:10	74.8	↑1.2
4/20 12:20	76.0	↑1.2
4/20 12:30	76.9	↑0.9
4/20 12:40	77.8	↑0.9
4/20 12:50	78.5	↑0.7
4/20 13:00	79.1	↑0.6
4/20 13:10	79.5	↑0.4
4/20 13:20	79.8	↑0.3
4/20 13:30	79.9	↑0.1	満潮
4/20 13:40	79.9	0
4/20 13:50	79.7	↓-0.2
4/20 14:00	79.4	↓-0.3
4/20 14:10	78.9	↓-0.5
4/20 14:20	78.3	↓-0.6
4/20 14:30	77.5	↓-0.8
4/20 14:40	76.6	↓-0.9
4/20 14:50	75.6	↓-1.0
4/20 15:00	74.4	↓-1.2
4/20 15:10	73.2	↓-1.2
4/20 15:20	71.8	↓-1.4
4/20 15:30	70.3	↓-1.5
4/20 15:40	68.7	↓-1.6
4/20 15:50	67.1	↓-1.6
4/20 16:00	65.4	↓-1.7
4/20 16:10	63.6	↓-1.8
4/20 16:20	61.8	↓-1.8
4/20 16:30	59.9	↓-1.9	最大潮位差
4/20 16:40	58.1	↓-1.8
4/20 16:50	56.2	↓-1.9	最大潮位差
4/20 17:00	54.4	↓-1.8
4/20 17:10	52.6	↓-1.8
4/20 17:20	50.8	↓-1.8
4/20 17:30	49.0	↓-1.8
4/20 17:40	47.4	↓-1.6
4/20 17:50	45.8	↓-1.6
4/20 18:00	44.3	↓-1.5
4/20 18:10	42.8	↓-1.5
4/20 18:20	41.5	↓-1.3
4/20 18:30	40.3	↓-1.2
4/20 18:40	39.3	↓-1.0
4/20 18:50	38.3	↓-1.0
4/20 19:00	37.5	↓-0.8
4/20 19:10	36.8	↓-0.7
4/20 19:20	36.3	↓-0.5
4/20 19:30	36.0	↓-0.3
4/20 19:40	35.7	↓-0.3	干潮
4/20 19:50	35.7	0	干潮
4/20 20:00	35.8	↑0.1
4/20 20:10	36.0	↑0.2
4/20 20:20	36.4	↑0.4
4/20 20:30	37.0	↑0.6
4/20 20:40	37.7	↑0.7
4/20 20:50	38.5	↑0.8
4/20 21:00	39.5	↑1.0
4/20 21:10	40.6	↑1.1
4/20 21:20	41.8	↑1.2
4/20 21:30	43.2	↑1.4
4/20 21:40	44.6	↑1.4
4/20 21:50	46.1	↑1.5
4/20 22:00	47.7	↑1.6
4/20 22:10	49.4	↑1.7
4/20 22:20	51.1	↑1.7
4/20 22:30	52.8	↑1.7
4/20 22:40	54.6	↑1.8
4/20 22:50	56.4	↑1.8
4/20 23:00	58.2	↑1.8
4/20 23:10	59.9	↑1.7
4/20 23:20	61.7	↑1.8
4/20 23:30	63.4	↑1.7
4/20 23:40	65.0	↑1.6
4/20 23:50	66.6	↑1.6