31 (金)	02:13	06:56	12:46	20:29
	68cm	55cm	93cm	8cm
中潮 出 07:04 入 16:18 出 03:55 入 13:43

函館（北海道）2021年12月31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
12/31 00:00	57.2	↑1.7
12/31 00:10	58.8	↑1.6
12/31 00:20	60.2	↑1.4
12/31 00:30	61.6	↑1.4
12/31 00:40	62.8	↑1.2
12/31 00:50	63.8	↑1.0
12/31 01:00	64.7	↑0.9
12/31 01:10	65.5	↑0.8
12/31 01:20	66.2	↑0.7
12/31 01:30	66.7	↑0.5
12/31 01:40	67.1	↑0.4
12/31 01:50	67.4	↑0.3
12/31 02:00	67.6	↑0.2
12/31 02:10	67.6	0	満潮
12/31 02:20	67.6	0
12/31 02:30	67.5	↓-0.1
12/31 02:40	67.3	↓-0.2
12/31 02:50	67.0	↓-0.3
12/31 03:00	66.6	↓-0.4
12/31 03:10	66.2	↓-0.4
12/31 03:20	65.7	↓-0.5
12/31 03:30	65.1	↓-0.6
12/31 03:40	64.5	↓-0.6
12/31 03:50	63.9	↓-0.6
12/31 04:00	63.2	↓-0.7
12/31 04:10	62.5	↓-0.7
12/31 04:20	61.8	↓-0.7
12/31 04:30	61.1	↓-0.7
12/31 04:40	60.3	↓-0.8
12/31 04:50	59.6	↓-0.7
12/31 05:00	58.9	↓-0.7
12/31 05:10	58.2	↓-0.7
12/31 05:20	57.6	↓-0.6
12/31 05:30	57.0	↓-0.6
12/31 05:40	56.4	↓-0.6
12/31 05:50	55.9	↓-0.5
12/31 06:00	55.4	↓-0.5
12/31 06:10	55.0	↓-0.4
12/31 06:20	54.7	↓-0.3
12/31 06:30	54.5	↓-0.2
12/31 06:40	54.3	↓-0.2
12/31 06:50	54.2	↓-0.1	干潮
12/31 07:00	54.2	0
12/31 07:10	54.3	↑0.1
12/31 07:20	54.5	↑0.2
12/31 07:30	54.8	↑0.3
12/31 07:40	55.2	↑0.4
12/31 07:50	55.6	↑0.4
12/31 08:00	56.2	↑0.6
12/31 08:10	56.9	↑0.7
12/31 08:20	57.7	↑0.8
12/31 08:30	58.6	↑0.9
12/31 08:40	59.6	↑1.0
12/31 08:50	60.7	↑1.1
12/31 09:00	61.9	↑1.2
12/31 09:10	63.3	↑1.4
12/31 09:20	64.7	↑1.4
12/31 09:30	66.2	↑1.5
12/31 09:40	67.8	↑1.6
12/31 09:50	69.5	↑1.7
12/31 10:00	71.3	↑1.8
12/31 10:10	73.0	↑1.7
12/31 10:20	74.9	↑1.9
12/31 10:30	76.7	↑1.8
12/31 10:40	78.5	↑1.8
12/31 10:50	80.3	↑1.8
12/31 11:00	82.0	↑1.7
12/31 11:10	83.7	↑1.7
12/31 11:20	85.3	↑1.6
12/31 11:30	86.7	↑1.4
12/31 11:40	88.0	↑1.3
12/31 11:50	89.2	↑1.2
12/31 12:00	90.2	↑1.0
12/31 12:10	91.0	↑0.8
12/31 12:20	91.6	↑0.6
12/31 12:30	92.1	↑0.5
12/31 12:40	92.3	↑0.2	満潮
12/31 12:50	92.3	0
12/31 13:00	92.0	↓-0.3
12/31 13:10	91.6	↓-0.4
12/31 13:20	91.0	↓-0.6
12/31 13:30	90.1	↓-0.9
12/31 13:40	89.1	↓-1.0
12/31 13:50	87.9	↓-1.2
12/31 14:00	86.5	↓-1.4
12/31 14:10	84.9	↓-1.6
12/31 14:20	83.2	↓-1.7
12/31 14:30	81.3	↓-1.9
12/31 14:40	79.3	↓-2.0
12/31 14:50	77.2	↓-2.1
12/31 15:00	74.9	↓-2.3
12/31 15:10	72.6	↓-2.3
12/31 15:20	70.1	↓-2.5
12/31 15:30	67.6	↓-2.5
12/31 15:40	65.0	↓-2.6
12/31 15:50	62.3	↓-2.7
12/31 16:00	59.6	↓-2.7
12/31 16:10	56.8	↓-2.8	最大潮位差
12/31 16:20	54.0	↓-2.8	最大潮位差
12/31 16:30	51.2	↓-2.8	最大潮位差
12/31 16:40	48.4	↓-2.8	最大潮位差
12/31 16:50	45.6	↓-2.8	最大潮位差
12/31 17:00	42.8	↓-2.8	最大潮位差
12/31 17:10	40.1	↓-2.7
12/31 17:20	37.4	↓-2.7
12/31 17:30	34.7	↓-2.7
12/31 17:40	32.1	↓-2.6
12/31 17:50	29.6	↓-2.5
12/31 18:00	27.2	↓-2.4
12/31 18:10	24.9	↓-2.3
12/31 18:20	22.7	↓-2.2
12/31 18:30	20.6	↓-2.1
12/31 18:40	18.7	↓-1.9
12/31 18:50	16.9	↓-1.8
12/31 19:00	15.2	↓-1.7
12/31 19:10	13.7	↓-1.5
12/31 19:20	12.3	↓-1.4
12/31 19:30	11.2	↓-1.1
12/31 19:40	10.1	↓-1.1
12/31 19:50	9.3	↓-0.8
12/31 20:00	8.7	↓-0.6
12/31 20:10	8.2	↓-0.5
12/31 20:20	7.9	↓-0.3	干潮
12/31 20:30	7.9	0
12/31 20:40	8.0	↑0.1
12/31 20:50	8.3	↑0.3
12/31 21:00	8.9	↑0.6
12/31 21:10	9.6	↑0.7
12/31 21:20	10.6	↑1.0
12/31 21:30	11.8	↑1.2
12/31 21:40	13.1	↑1.3
12/31 21:50	14.7	↑1.6
12/31 22:00	16.5	↑1.8
12/31 22:10	18.4	↑1.9
12/31 22:20	20.5	↑2.1
12/31 22:30	22.7	↑2.2
12/31 22:40	25.1	↑2.4
12/31 22:50	27.6	↑2.5
12/31 23:00	30.2	↑2.6
12/31 23:10	32.9	↑2.7
12/31 23:20	35.6	↑2.7
12/31 23:30	38.3	↑2.7
12/31 23:40	41.1	↑2.8	最大潮位差
12/31 23:50	43.8	↑2.7