20 (月)	09:50	03:08	21:27	15:38
	81cm	50cm	80cm	62cm
長潮 出 06:52 入 15:46 出 - 入 12:08

コイセボイ（北海道）2038年12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
12/20 00:00	65.2	↓-1.4
12/20 00:10	63.7	↓-1.5	最大潮位差
12/20 00:20	62.3	↓-1.4
12/20 00:30	61.0	↓-1.3
12/20 00:40	59.7	↓-1.3
12/20 00:50	58.4	↓-1.3
12/20 01:00	57.2	↓-1.2
12/20 01:10	56.1	↓-1.1
12/20 01:20	55.0	↓-1.1
12/20 01:30	54.1	↓-0.9
12/20 01:40	53.2	↓-0.9
12/20 01:50	52.3	↓-0.9
12/20 02:00	51.6	↓-0.7
12/20 02:10	51.0	↓-0.6
12/20 02:20	50.5	↓-0.5
12/20 02:30	50.0	↓-0.5
12/20 02:40	49.7	↓-0.3
12/20 02:50	49.5	↓-0.2
12/20 03:00	49.4	↓-0.1	干潮
12/20 03:10	49.3	↓-0.1
12/20 03:20	49.4	↑0.1
12/20 03:30	49.6	↑0.2
12/20 03:40	49.9	↑0.3
12/20 03:50	50.3	↑0.4
12/20 04:00	50.8	↑0.5
12/20 04:10	51.3	↑0.5
12/20 04:20	52.0	↑0.7
12/20 04:30	52.7	↑0.7
12/20 04:40	53.5	↑0.8
12/20 04:50	54.4	↑0.9
12/20 05:00	55.3	↑0.9
12/20 05:10	56.3	↑1.0
12/20 05:20	57.4	↑1.1
12/20 05:30	58.5	↑1.1
12/20 05:40	59.6	↑1.1
12/20 05:50	60.8	↑1.2
12/20 06:00	62.0	↑1.2
12/20 06:10	63.2	↑1.2
12/20 06:20	64.4	↑1.2
12/20 06:30	65.6	↑1.2
12/20 06:40	66.8	↑1.2
12/20 06:50	67.9	↑1.1
12/20 07:00	69.1	↑1.2
12/20 07:10	70.2	↑1.1
12/20 07:20	71.3	↑1.1
12/20 07:30	72.4	↑1.1
12/20 07:40	73.4	↑1.0
12/20 07:50	74.3	↑0.9
12/20 08:00	75.2	↑0.9
12/20 08:10	76.0	↑0.8
12/20 08:20	76.8	↑0.8
12/20 08:30	77.5	↑0.7
12/20 08:40	78.1	↑0.6
12/20 08:50	78.6	↑0.5
12/20 09:00	79.0	↑0.4
12/20 09:10	79.4	↑0.4
12/20 09:20	79.7	↑0.3
12/20 09:30	79.9	↑0.2
12/20 09:40	80.0	↑0.1	満潮
12/20 09:50	80.0	0	満潮
12/20 10:00	80.0	0
12/20 10:10	79.8	↓-0.2
12/20 10:20	79.6	↓-0.2
12/20 10:30	79.4	↓-0.2
12/20 10:40	79.0	↓-0.4
12/20 10:50	78.6	↓-0.4
12/20 11:00	78.1	↓-0.5
12/20 11:10	77.6	↓-0.5
12/20 11:20	77.0	↓-0.6
12/20 11:30	76.3	↓-0.7
12/20 11:40	75.6	↓-0.7
12/20 11:50	74.9	↓-0.7
12/20 12:00	74.2	↓-0.7
12/20 12:10	73.4	↓-0.8
12/20 12:20	72.6	↓-0.8
12/20 12:30	71.8	↓-0.8
12/20 12:40	71.0	↓-0.8
12/20 12:50	70.1	↓-0.9
12/20 13:00	69.3	↓-0.8
12/20 13:10	68.6	↓-0.7
12/20 13:20	67.8	↓-0.8
12/20 13:30	67.0	↓-0.8
12/20 13:40	66.3	↓-0.7
12/20 13:50	65.7	↓-0.6
12/20 14:00	65.0	↓-0.7
12/20 14:10	64.4	↓-0.6
12/20 14:20	63.9	↓-0.5
12/20 14:30	63.4	↓-0.5
12/20 14:40	63.0	↓-0.4
12/20 14:50	62.7	↓-0.3
12/20 15:00	62.4	↓-0.3
12/20 15:10	62.2	↓-0.2
12/20 15:20	62.0	↓-0.2
12/20 15:30	61.9	↓-0.1	干潮
12/20 15:40	61.9	0
12/20 15:50	62.0	↑0.1
12/20 16:00	62.1	↑0.1
12/20 16:10	62.3	↑0.2
12/20 16:20	62.5	↑0.2
12/20 16:30	62.9	↑0.4
12/20 16:40	63.3	↑0.4
12/20 16:50	63.7	↑0.4
12/20 17:00	64.2	↑0.5
12/20 17:10	64.8	↑0.6
12/20 17:20	65.3	↑0.5
12/20 17:30	66.0	↑0.7
12/20 17:40	66.7	↑0.7
12/20 17:50	67.4	↑0.7
12/20 18:00	68.1	↑0.7
12/20 18:10	68.9	↑0.8
12/20 18:20	69.6	↑0.7
12/20 18:30	70.4	↑0.8
12/20 18:40	71.2	↑0.8
12/20 18:50	72.0	↑0.8
12/20 19:00	72.8	↑0.8
12/20 19:10	73.5	↑0.7
12/20 19:20	74.2	↑0.7
12/20 19:30	74.9	↑0.7
12/20 19:40	75.6	↑0.7
12/20 19:50	76.2	↑0.6
12/20 20:00	76.8	↑0.6
12/20 20:10	77.3	↑0.5
12/20 20:20	77.8	↑0.5
12/20 20:30	78.2	↑0.4
12/20 20:40	78.6	↑0.4
12/20 20:50	78.9	↑0.3
12/20 21:00	79.1	↑0.2
12/20 21:10	79.3	↑0.2
12/20 21:20	79.4	↑0.1	満潮
12/20 21:30	79.4	0
12/20 21:40	79.3	↓-0.1
12/20 21:50	79.1	↓-0.2
12/20 22:00	78.9	↓-0.2
12/20 22:10	78.6	↓-0.3
12/20 22:20	78.3	↓-0.3
12/20 22:30	77.8	↓-0.5
12/20 22:40	77.3	↓-0.5
12/20 22:50	76.8	↓-0.5
12/20 23:00	76.1	↓-0.7
12/20 23:10	75.4	↓-0.7
12/20 23:20	74.7	↓-0.7
12/20 23:30	73.9	↓-0.8
12/20 23:40	73.0	↓-0.9
12/20 23:50	72.2	↓-0.8