21 (月)	13:08	06:40	23:44	16:39
	63cm	35cm	98cm	57cm
中潮 出 03:38 入 19:09 出 14:52 入 00:52

コイセボイ（北海道）2021年06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
6/21 00:00	85.8	↓-0.7
6/21 00:10	85.1	↓-0.7
6/21 00:20	84.2	↓-0.9
6/21 00:30	83.2	↓-1.0
6/21 00:40	82.1	↓-1.1
6/21 00:50	81.0	↓-1.1
6/21 01:00	79.7	↓-1.3
6/21 01:10	78.3	↓-1.4
6/21 01:20	76.8	↓-1.5
6/21 01:30	75.3	↓-1.5
6/21 01:40	73.7	↓-1.6
6/21 01:50	72.0	↓-1.7
6/21 02:00	70.3	↓-1.7
6/21 02:10	68.5	↓-1.8
6/21 02:20	66.7	↓-1.8
6/21 02:30	64.9	↓-1.8
6/21 02:40	63.0	↓-1.9	最大潮位差
6/21 02:50	61.2	↓-1.8
6/21 03:00	59.3	↓-1.9	最大潮位差
6/21 03:10	57.5	↓-1.8
6/21 03:20	55.6	↓-1.9	最大潮位差
6/21 03:30	53.8	↓-1.8
6/21 03:40	52.1	↓-1.7
6/21 03:50	50.4	↓-1.7
6/21 04:00	48.7	↓-1.7
6/21 04:10	47.1	↓-1.6
6/21 04:20	45.6	↓-1.5
6/21 04:30	44.2	↓-1.4
6/21 04:40	42.8	↓-1.4
6/21 04:50	41.6	↓-1.2
6/21 05:00	40.4	↓-1.2
6/21 05:10	39.3	↓-1.1
6/21 05:20	38.4	↓-0.9
6/21 05:30	37.5	↓-0.9
6/21 05:40	36.8	↓-0.7
6/21 05:50	36.1	↓-0.7
6/21 06:00	35.6	↓-0.5
6/21 06:10	35.2	↓-0.4
6/21 06:20	35.0	↓-0.2
6/21 06:30	34.8	↓-0.2	干潮
6/21 06:40	34.8	0	干潮
6/21 06:50	34.8	0
6/21 07:00	35.0	↑0.2
6/21 07:10	35.3	↑0.3
6/21 07:20	35.7	↑0.4
6/21 07:30	36.1	↑0.4
6/21 07:40	36.7	↑0.6
6/21 07:50	37.4	↑0.7
6/21 08:00	38.1	↑0.7
6/21 08:10	38.9	↑0.8
6/21 08:20	39.8	↑0.9
6/21 08:30	40.7	↑0.9
6/21 08:40	41.7	↑1.0
6/21 08:50	42.7	↑1.0
6/21 09:00	43.8	↑1.1
6/21 09:10	44.9	↑1.1
6/21 09:20	46.0	↑1.1
6/21 09:30	47.1	↑1.1
6/21 09:40	48.2	↑1.1
6/21 09:50	49.4	↑1.2
6/21 10:00	50.5	↑1.1
6/21 10:10	51.5	↑1.0
6/21 10:20	52.6	↑1.1
6/21 10:30	53.6	↑1.0
6/21 10:40	54.6	↑1.0
6/21 10:50	55.6	↑1.0
6/21 11:00	56.5	↑0.9
6/21 11:10	57.3	↑0.8
6/21 11:20	58.1	↑0.8
6/21 11:30	58.8	↑0.7
6/21 11:40	59.4	↑0.6
6/21 11:50	60.0	↑0.6
6/21 12:00	60.5	↑0.5
6/21 12:10	60.9	↑0.4
6/21 12:20	61.3	↑0.4
6/21 12:30	61.6	↑0.3
6/21 12:40	61.8	↑0.2
6/21 12:50	61.9	↑0.1
6/21 13:00	62.0	↑0.1	満潮
6/21 13:10	62.0	0
6/21 13:20	62.0	0
6/21 13:30	61.9	↓-0.1
6/21 13:40	61.7	↓-0.2
6/21 13:50	61.5	↓-0.2
6/21 14:00	61.2	↓-0.3
6/21 14:10	60.9	↓-0.3
6/21 14:20	60.6	↓-0.3
6/21 14:30	60.3	↓-0.3
6/21 14:40	59.9	↓-0.4
6/21 14:50	59.5	↓-0.4
6/21 15:00	59.2	↓-0.3
6/21 15:10	58.8	↓-0.4
6/21 15:20	58.4	↓-0.4
6/21 15:30	58.1	↓-0.3
6/21 15:40	57.8	↓-0.3
6/21 15:50	57.5	↓-0.3
6/21 16:00	57.2	↓-0.3
6/21 16:10	57.0	↓-0.2
6/21 16:20	56.9	↓-0.1
6/21 16:30	56.8	↓-0.1	干潮
6/21 16:40	56.8	0
6/21 16:50	56.8	0
6/21 17:00	57.0	↑0.2
6/21 17:10	57.2	↑0.2
6/21 17:20	57.4	↑0.2
6/21 17:30	57.8	↑0.4
6/21 17:40	58.3	↑0.5
6/21 17:50	58.8	↑0.5
6/21 18:00	59.4	↑0.6
6/21 18:10	60.1	↑0.7
6/21 18:20	60.9	↑0.8
6/21 18:30	61.8	↑0.9
6/21 18:40	62.8	↑1.0
6/21 18:50	63.8	↑1.0
6/21 19:00	65.0	↑1.2
6/21 19:10	66.2	↑1.2
6/21 19:20	67.4	↑1.2
6/21 19:30	68.8	↑1.4
6/21 19:40	70.1	↑1.3
6/21 19:50	71.6	↑1.5
6/21 20:00	73.0	↑1.4
6/21 20:10	74.5	↑1.5
6/21 20:20	76.1	↑1.6
6/21 20:30	77.6	↑1.5
6/21 20:40	79.2	↑1.6
6/21 20:50	80.7	↑1.5
6/21 21:00	82.3	↑1.6
6/21 21:10	83.8	↑1.5
6/21 21:20	85.2	↑1.4
6/21 21:30	86.7	↑1.5
6/21 21:40	88.1	↑1.4
6/21 21:50	89.4	↑1.3
6/21 22:00	90.7	↑1.3
6/21 22:10	91.8	↑1.1
6/21 22:20	92.9	↑1.1
6/21 22:30	93.9	↑1.0
6/21 22:40	94.8	↑0.9
6/21 22:50	95.6	↑0.8
6/21 23:00	96.2	↑0.6
6/21 23:10	96.7	↑0.5
6/21 23:20	97.1	↑0.4
6/21 23:30	97.4	↑0.3
6/21 23:40	97.5	↑0.1	満潮
6/21 23:50	97.5	0