20 (月)	05:59	06:13	14:36	22:51
	65cm	65cm	133cm	12cm
大潮 出 06:52 入 15:46 出 16:21 入 07:48

コイセボイ（北海道）2021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	22.7	↑1.7
12/20 00:10	24.4	↑1.7
12/20 00:20	26.3	↑1.9
12/20 00:30	28.2	↑1.9
12/20 00:40	30.1	↑1.9
12/20 00:50	32.1	↑2.0
12/20 01:00	34.1	↑2.0
12/20 01:10	36.1	↑2.0
12/20 01:20	38.1	↑2.0
12/20 01:30	40.1	↑2.0
12/20 01:40	42.0	↑1.9
12/20 01:50	43.9	↑1.9
12/20 02:00	45.8	↑1.9
12/20 02:10	47.6	↑1.8
12/20 02:20	49.3	↑1.7
12/20 02:30	50.9	↑1.6
12/20 02:40	52.5	↑1.6
12/20 02:50	54.0	↑1.5
12/20 03:00	55.4	↑1.4
12/20 03:10	56.6	↑1.2
12/20 03:20	57.8	↑1.2
12/20 03:30	58.9	↑1.1
12/20 03:40	59.9	↑1.0
12/20 03:50	60.7	↑0.8
12/20 04:00	61.5	↑0.8
12/20 04:10	62.2	↑0.7
12/20 04:20	62.7	↑0.5
12/20 04:30	63.2	↑0.5
12/20 04:40	63.6	↑0.4
12/20 04:50	63.9	↑0.3
12/20 05:00	64.2	↑0.3
12/20 05:10	64.3	↑0.1
12/20 05:20	64.5	↑0.2
12/20 05:30	64.6	↑0.1
12/20 05:40	64.6	0
12/20 05:50	64.6	0	満潮
12/20 06:00	64.6	0
12/20 06:10	64.6	0	干潮
12/20 06:20	64.6	0
12/20 06:30	64.6	0
12/20 06:40	64.7	↑0.1
12/20 06:50	64.8	↑0.1
12/20 07:00	64.9	↑0.1
12/20 07:10	65.1	↑0.2
12/20 07:20	65.3	↑0.2
12/20 07:30	65.7	↑0.4
12/20 07:40	66.1	↑0.4
12/20 07:50	66.6	↑0.5
12/20 08:00	67.2	↑0.6
12/20 08:10	67.9	↑0.7
12/20 08:20	68.7	↑0.8
12/20 08:30	69.6	↑0.9
12/20 08:40	70.6	↑1.0
12/20 08:50	71.8	↑1.2
12/20 09:00	73.1	↑1.3
12/20 09:10	74.5	↑1.4
12/20 09:20	76.0	↑1.5
12/20 09:30	77.6	↑1.6
12/20 09:40	79.3	↑1.7
12/20 09:50	81.2	↑1.9
12/20 10:00	83.1	↑1.9
12/20 10:10	85.1	↑2.0
12/20 10:20	87.3	↑2.2
12/20 10:30	89.5	↑2.2
12/20 10:40	91.7	↑2.2
12/20 10:50	94.1	↑2.4
12/20 11:00	96.4	↑2.3
12/20 11:10	98.8	↑2.4
12/20 11:20	101.3	↑2.5
12/20 11:30	103.7	↑2.4
12/20 11:40	106.1	↑2.4
12/20 11:50	108.5	↑2.4
12/20 12:00	110.9	↑2.4
12/20 12:10	113.2	↑2.3
12/20 12:20	115.5	↑2.3
12/20 12:30	117.7	↑2.2
12/20 12:40	119.8	↑2.1
12/20 12:50	121.8	↑2.0
12/20 13:00	123.6	↑1.8
12/20 13:10	125.3	↑1.7
12/20 13:20	126.9	↑1.6
12/20 13:30	128.3	↑1.4
12/20 13:40	129.6	↑1.3
12/20 13:50	130.6	↑1.0
12/20 14:00	131.5	↑0.9
12/20 14:10	132.2	↑0.7
12/20 14:20	132.6	↑0.4
12/20 14:30	132.8	↑0.2	満潮
12/20 14:40	132.9	↑0.1
12/20 14:50	132.6	↓-0.3
12/20 15:00	132.2	↓-0.4
12/20 15:10	131.5	↓-0.7
12/20 15:20	130.6	↓-0.9
12/20 15:30	129.4	↓-1.2
12/20 15:40	128.0	↓-1.4
12/20 15:50	126.4	↓-1.6
12/20 16:00	124.5	↓-1.9
12/20 16:10	122.5	↓-2.0
12/20 16:20	120.2	↓-2.3
12/20 16:30	117.7	↓-2.5
12/20 16:40	115.0	↓-2.7
12/20 16:50	112.1	↓-2.9
12/20 17:00	109.1	↓-3.0
12/20 17:10	105.9	↓-3.2
12/20 17:20	102.5	↓-3.4
12/20 17:30	99.0	↓-3.5
12/20 17:40	95.4	↓-3.6
12/20 17:50	91.7	↓-3.7
12/20 18:00	87.9	↓-3.8
12/20 18:10	84.1	↓-3.8
12/20 18:20	80.2	↓-3.9
12/20 18:30	76.2	↓-4.0	最大潮位差
12/20 18:40	72.3	↓-3.9
12/20 18:50	68.3	↓-4.0	最大潮位差
12/20 19:00	64.4	↓-3.9
12/20 19:10	60.5	↓-3.9
12/20 19:20	56.6	↓-3.9
12/20 19:30	52.9	↓-3.7
12/20 19:40	49.2	↓-3.7
12/20 19:50	45.6	↓-3.6
12/20 20:00	42.2	↓-3.4
12/20 20:10	38.8	↓-3.4
12/20 20:20	35.7	↓-3.1
12/20 20:30	32.6	↓-3.1
12/20 20:40	29.8	↓-2.8
12/20 20:50	27.1	↓-2.7
12/20 21:00	24.7	↓-2.4
12/20 21:10	22.4	↓-2.3
12/20 21:20	20.3	↓-2.1
12/20 21:30	18.5	↓-1.8
12/20 21:40	16.8	↓-1.7
12/20 21:50	15.4	↓-1.4
12/20 22:00	14.2	↓-1.2
12/20 22:10	13.3	↓-0.9
12/20 22:20	12.5	↓-0.8
12/20 22:30	12.0	↓-0.5
12/20 22:40	11.7	↓-0.3
12/20 22:50	11.6	↓-0.1	干潮
12/20 23:00	11.7	↑0.1
12/20 23:10	12.0	↑0.3
12/20 23:20	12.5	↑0.5
12/20 23:30	13.2	↑0.7
12/20 23:40	14.0	↑0.8
12/20 23:50	15.0	↑1.0