21 (月)	07:59	01:28	18:40	12:05
	73cm	37cm	99cm	64cm
小潮 出 06:53 入 15:47 出 23:03 入 11:13

コイセボイ（北海道）2054年12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
12/21 00:00	41.9	↓-1.4
12/21 00:10	40.7	↓-1.2
12/21 00:20	39.6	↓-1.1
12/21 00:30	38.6	↓-1.0
12/21 00:40	37.8	↓-0.8
12/21 00:50	37.2	↓-0.6
12/21 01:00	36.7	↓-0.5
12/21 01:10	36.4	↓-0.3
12/21 01:20	36.2	↓-0.2	干潮
12/21 01:30	36.2	0
12/21 01:40	36.3	↑0.1
12/21 01:50	36.5	↑0.2
12/21 02:00	36.9	↑0.4
12/21 02:10	37.5	↑0.6
12/21 02:20	38.1	↑0.6
12/21 02:30	38.9	↑0.8
12/21 02:40	39.8	↑0.9
12/21 02:50	40.8	↑1.0
12/21 03:00	41.9	↑1.1
12/21 03:10	43.1	↑1.2
12/21 03:20	44.4	↑1.3
12/21 03:30	45.7	↑1.3
12/21 03:40	47.1	↑1.4
12/21 03:50	48.5	↑1.4
12/21 04:00	49.9	↑1.4
12/21 04:10	51.4	↑1.5
12/21 04:20	52.9	↑1.5
12/21 04:30	54.4	↑1.5
12/21 04:40	55.9	↑1.5
12/21 04:50	57.4	↑1.5
12/21 05:00	58.8	↑1.4
12/21 05:10	60.3	↑1.5
12/21 05:20	61.6	↑1.3
12/21 05:30	62.9	↑1.3
12/21 05:40	64.2	↑1.3
12/21 05:50	65.4	↑1.2
12/21 06:00	66.5	↑1.1
12/21 06:10	67.5	↑1.0
12/21 06:20	68.5	↑1.0
12/21 06:30	69.4	↑0.9
12/21 06:40	70.1	↑0.7
12/21 06:50	70.8	↑0.7
12/21 07:00	71.4	↑0.6
12/21 07:10	71.9	↑0.5
12/21 07:20	72.3	↑0.4
12/21 07:30	72.6	↑0.3
12/21 07:40	72.8	↑0.2
12/21 07:50	72.9	↑0.1	満潮
12/21 08:00	73.0	↑0.1
12/21 08:10	72.9	↓-0.1
12/21 08:20	72.8	↓-0.1
12/21 08:30	72.5	↓-0.3
12/21 08:40	72.3	↓-0.2
12/21 08:50	71.9	↓-0.4
12/21 09:00	71.5	↓-0.4
12/21 09:10	71.1	↓-0.4
12/21 09:20	70.6	↓-0.5
12/21 09:30	70.0	↓-0.6
12/21 09:40	69.5	↓-0.5
12/21 09:50	68.9	↓-0.6
12/21 10:00	68.4	↓-0.5
12/21 10:10	67.8	↓-0.6
12/21 10:20	67.2	↓-0.6
12/21 10:30	66.7	↓-0.5
12/21 10:40	66.1	↓-0.6
12/21 10:50	65.6	↓-0.5
12/21 11:00	65.2	↓-0.4
12/21 11:10	64.8	↓-0.4
12/21 11:20	64.4	↓-0.4
12/21 11:30	64.1	↓-0.3
12/21 11:40	63.9	↓-0.2
12/21 11:50	63.7	↓-0.2
12/21 12:00	63.7	0	干潮
12/21 12:10	63.7	0
12/21 12:20	63.8	↑0.1
12/21 12:30	63.9	↑0.1
12/21 12:40	64.2	↑0.3
12/21 12:50	64.6	↑0.4
12/21 13:00	65.0	↑0.4
12/21 13:10	65.6	↑0.6
12/21 13:20	66.2	↑0.6
12/21 13:30	66.9	↑0.7
12/21 13:40	67.7	↑0.8
12/21 13:50	68.6	↑0.9
12/21 14:00	69.5	↑0.9
12/21 14:10	70.6	↑1.1
12/21 14:20	71.7	↑1.1
12/21 14:30	72.8	↑1.1
12/21 14:40	74.1	↑1.3
12/21 14:50	75.3	↑1.2
12/21 15:00	76.6	↑1.3
12/21 15:10	78.0	↑1.4
12/21 15:20	79.3	↑1.3
12/21 15:30	80.7	↑1.4
12/21 15:40	82.1	↑1.4
12/21 15:50	83.5	↑1.4
12/21 16:00	84.9	↑1.4
12/21 16:10	86.2	↑1.3
12/21 16:20	87.5	↑1.3
12/21 16:30	88.8	↑1.3
12/21 16:40	90.0	↑1.2
12/21 16:50	91.2	↑1.2
12/21 17:00	92.3	↑1.1
12/21 17:10	93.3	↑1.0
12/21 17:20	94.3	↑1.0
12/21 17:30	95.1	↑0.8
12/21 17:40	95.9	↑0.8
12/21 17:50	96.5	↑0.6
12/21 18:00	97.1	↑0.6
12/21 18:10	97.5	↑0.4
12/21 18:20	97.8	↑0.3
12/21 18:30	98.0	↑0.2	満潮
12/21 18:40	98.0	0	満潮
12/21 18:50	98.0	0
12/21 19:00	97.8	↓-0.2
12/21 19:10	97.4	↓-0.4
12/21 19:20	97.0	↓-0.4
12/21 19:30	96.4	↓-0.6
12/21 19:40	95.6	↓-0.8
12/21 19:50	94.8	↓-0.8
12/21 20:00	93.8	↓-1.0
12/21 20:10	92.7	↓-1.1
12/21 20:20	91.5	↓-1.2
12/21 20:30	90.2	↓-1.3
12/21 20:40	88.8	↓-1.4
12/21 20:50	87.3	↓-1.5
12/21 21:00	85.7	↓-1.6
12/21 21:10	84.0	↓-1.7
12/21 21:20	82.3	↓-1.7
12/21 21:30	80.5	↓-1.8
12/21 21:40	78.6	↓-1.9
12/21 21:50	76.7	↓-1.9
12/21 22:00	74.8	↓-1.9
12/21 22:10	72.8	↓-2.0	最大潮位差
12/21 22:20	70.9	↓-1.9
12/21 22:30	68.9	↓-2.0	最大潮位差
12/21 22:40	66.9	↓-2.0	最大潮位差
12/21 22:50	65.0	↓-1.9
12/21 23:00	63.1	↓-1.9
12/21 23:10	61.2	↓-1.9
12/21 23:20	59.4	↓-1.8
12/21 23:30	57.7	↓-1.7
12/21 23:40	56.0	↓-1.7
12/21 23:50	54.3	↓-1.7