20 (木)	01:58	07:32	13:18	20:36
	71cm	46cm	89cm	12cm
大潮 出 07:00 入 16:11 出 14:26 入 03:38

函館（北海道）2018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	59.8	↑1.9
12/20 00:10	61.6	↑1.8
12/20 00:20	63.2	↑1.6
12/20 00:30	64.7	↑1.5
12/20 00:40	66.0	↑1.3
12/20 00:50	67.1	↑1.1
12/20 01:00	68.1	↑1.0
12/20 01:10	68.9	↑0.8
12/20 01:20	69.5	↑0.6
12/20 01:30	70.0	↑0.5
12/20 01:40	70.3	↑0.3
12/20 01:50	70.5	↑0.2	満潮
12/20 02:00	70.5	0
12/20 02:10	70.4	↓-0.1
12/20 02:20	70.2	↓-0.2
12/20 02:30	69.8	↓-0.4
12/20 02:40	69.4	↓-0.4
12/20 02:50	68.8	↓-0.6
12/20 03:00	68.2	↓-0.6
12/20 03:10	67.5	↓-0.7
12/20 03:20	66.7	↓-0.8
12/20 03:30	65.8	↓-0.9
12/20 03:40	64.9	↓-0.9
12/20 03:50	63.9	↓-1.0
12/20 04:00	62.8	↓-1.1
12/20 04:10	61.8	↓-1.0
12/20 04:20	60.7	↓-1.1
12/20 04:30	59.6	↓-1.1
12/20 04:40	58.4	↓-1.2
12/20 04:50	57.3	↓-1.1
12/20 05:00	56.2	↓-1.1
12/20 05:10	55.1	↓-1.1
12/20 05:20	54.0	↓-1.1
12/20 05:30	52.9	↓-1.1
12/20 05:40	51.9	↓-1.0
12/20 05:50	51.0	↓-0.9
12/20 06:00	50.1	↓-0.9
12/20 06:10	49.3	↓-0.8
12/20 06:20	48.5	↓-0.8
12/20 06:30	47.9	↓-0.6
12/20 06:40	47.3	↓-0.6
12/20 06:50	46.8	↓-0.5
12/20 07:00	46.5	↓-0.3
12/20 07:10	46.2	↓-0.3
12/20 07:20	46.0	↓-0.2
12/20 07:30	45.9	↓-0.1	干潮
12/20 07:40	46.0	↑0.1
12/20 07:50	46.2	↑0.2
12/20 08:00	46.4	↑0.2
12/20 08:10	46.8	↑0.4
12/20 08:20	47.4	↑0.6
12/20 08:30	48.0	↑0.6
12/20 08:40	48.8	↑0.8
12/20 08:50	49.7	↑0.9
12/20 09:00	50.7	↑1.0
12/20 09:10	51.9	↑1.2
12/20 09:20	53.2	↑1.3
12/20 09:30	54.6	↑1.4
12/20 09:40	56.1	↑1.5
12/20 09:50	57.8	↑1.7
12/20 10:00	59.6	↑1.8
12/20 10:10	61.4	↑1.8
12/20 10:20	63.3	↑1.9
12/20 10:30	65.3	↑2.0
12/20 10:40	67.4	↑2.1
12/20 10:50	69.4	↑2.0
12/20 11:00	71.5	↑2.1
12/20 11:10	73.5	↑2.0
12/20 11:20	75.5	↑2.0
12/20 11:30	77.4	↑1.9
12/20 11:40	79.3	↑1.9
12/20 11:50	81.0	↑1.7
12/20 12:00	82.6	↑1.6
12/20 12:10	84.0	↑1.4
12/20 12:20	85.3	↑1.3
12/20 12:30	86.4	↑1.1
12/20 12:40	87.3	↑0.9
12/20 12:50	88.0	↑0.7
12/20 13:00	88.4	↑0.4
12/20 13:10	88.7	↑0.3	満潮
12/20 13:20	88.7	0
12/20 13:30	88.6	↓-0.1
12/20 13:40	88.2	↓-0.4
12/20 13:50	87.6	↓-0.6
12/20 14:00	86.8	↓-0.8
12/20 14:10	85.8	↓-1.0
12/20 14:20	84.6	↓-1.2
12/20 14:30	83.3	↓-1.3
12/20 14:40	81.8	↓-1.5
12/20 14:50	80.1	↓-1.7
12/20 15:00	78.3	↓-1.8
12/20 15:10	76.4	↓-1.9
12/20 15:20	74.4	↓-2.0
12/20 15:30	72.2	↓-2.2
12/20 15:40	69.9	↓-2.3
12/20 15:50	67.5	↓-2.4
12/20 16:00	65.1	↓-2.4
12/20 16:10	62.6	↓-2.5
12/20 16:20	60.0	↓-2.6
12/20 16:30	57.3	↓-2.7
12/20 16:40	54.7	↓-2.6
12/20 16:50	52.0	↓-2.7
12/20 17:00	49.2	↓-2.8
12/20 17:10	46.5	↓-2.7
12/20 17:20	43.8	↓-2.7
12/20 17:30	41.1	↓-2.7
12/20 17:40	38.5	↓-2.6
12/20 17:50	35.9	↓-2.6
12/20 18:00	33.3	↓-2.6
12/20 18:10	30.9	↓-2.4
12/20 18:20	28.5	↓-2.4
12/20 18:30	26.3	↓-2.2
12/20 18:40	24.2	↓-2.1
12/20 18:50	22.2	↓-2.0
12/20 19:00	20.3	↓-1.9
12/20 19:10	18.6	↓-1.7
12/20 19:20	17.1	↓-1.5
12/20 19:30	15.7	↓-1.4
12/20 19:40	14.5	↓-1.2
12/20 19:50	13.5	↓-1.0
12/20 20:00	12.6	↓-0.9
12/20 20:10	12.0	↓-0.6
12/20 20:20	11.6	↓-0.4
12/20 20:30	11.4	↓-0.2	干潮
12/20 20:40	11.3	↓-0.1
12/20 20:50	11.6	↑0.3
12/20 21:00	12.0	↑0.4
12/20 21:10	12.6	↑0.6
12/20 21:20	13.5	↑0.9
12/20 21:30	14.6	↑1.1
12/20 21:40	15.8	↑1.2
12/20 21:50	17.3	↑1.5
12/20 22:00	19.1	↑1.8
12/20 22:10	21.0	↑1.9
12/20 22:20	23.0	↑2.0
12/20 22:30	25.3	↑2.3
12/20 22:40	27.7	↑2.4
12/20 22:50	30.2	↑2.5
12/20 23:00	32.9	↑2.7
12/20 23:10	35.7	↑2.8
12/20 23:20	38.5	↑2.8
12/20 23:30	41.3	↑2.8
12/20 23:40	44.2	↑2.9	最大潮位差
12/20 23:50	47.0	↑2.8