20 (月)	02:28	08:45	14:21	20:55
	72cm	24cm	72cm	18cm
中潮 出 04:51 入 18:24 出 03:57 入 15:32

函館（北海道）2020年04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
4/20 00:00	54.8	↑2.2
4/20 00:10	56.9	↑2.1
4/20 00:20	58.9	↑2.0
4/20 00:30	60.8	↑1.9
4/20 00:40	62.5	↑1.7
4/20 00:50	64.1	↑1.6
4/20 01:00	65.5	↑1.4
4/20 01:10	66.8	↑1.3
4/20 01:20	67.9	↑1.1
4/20 01:30	68.9	↑1.0
4/20 01:40	69.7	↑0.8
4/20 01:50	70.4	↑0.7
4/20 02:00	70.9	↑0.5
4/20 02:10	71.3	↑0.4
4/20 02:20	71.4	↑0.1	満潮
4/20 02:30	71.5	↑0.1
4/20 02:40	71.3	↓-0.2
4/20 02:50	71.1	↓-0.2
4/20 03:00	70.6	↓-0.5
4/20 03:10	70.1	↓-0.5
4/20 03:20	69.3	↓-0.8
4/20 03:30	68.5	↓-0.8
4/20 03:40	67.5	↓-1.0
4/20 03:50	66.4	↓-1.1
4/20 04:00	65.1	↓-1.3
4/20 04:10	63.7	↓-1.4
4/20 04:20	62.2	↓-1.5
4/20 04:30	60.7	↓-1.5
4/20 04:40	59.0	↓-1.7
4/20 04:50	57.2	↓-1.8
4/20 05:00	55.4	↓-1.8
4/20 05:10	53.6	↓-1.8
4/20 05:20	51.6	↓-2.0
4/20 05:30	49.7	↓-1.9
4/20 05:40	47.7	↓-2.0
4/20 05:50	45.8	↓-1.9
4/20 06:00	43.8	↓-2.0
4/20 06:10	41.9	↓-1.9
4/20 06:20	40.0	↓-1.9
4/20 06:30	38.2	↓-1.8
4/20 06:40	36.4	↓-1.8
4/20 06:50	34.7	↓-1.7
4/20 07:00	33.1	↓-1.6
4/20 07:10	31.5	↓-1.6
4/20 07:20	30.1	↓-1.4
4/20 07:30	28.8	↓-1.3
4/20 07:40	27.6	↓-1.2
4/20 07:50	26.6	↓-1.0
4/20 08:00	25.7	↓-0.9
4/20 08:10	25.0	↓-0.7
4/20 08:20	24.4	↓-0.6
4/20 08:30	24.1	↓-0.3
4/20 08:40	23.9	↓-0.2	干潮
4/20 08:50	23.9	0
4/20 09:00	24.1	↑0.2
4/20 09:10	24.6	↑0.5
4/20 09:20	25.2	↑0.6
4/20 09:30	26.0	↑0.8
4/20 09:40	27.1	↑1.1
4/20 09:50	28.3	↑1.2
4/20 10:00	29.7	↑1.4
4/20 10:10	31.3	↑1.6
4/20 10:20	33.1	↑1.8
4/20 10:30	35.0	↑1.9
4/20 10:40	37.0	↑2.0
4/20 10:50	39.2	↑2.2
4/20 11:00	41.4	↑2.2
4/20 11:10	43.7	↑2.3
4/20 11:20	46.0	↑2.3
4/20 11:30	48.3	↑2.3
4/20 11:40	50.6	↑2.3
4/20 11:50	52.9	↑2.3
4/20 12:00	55.1	↑2.2
4/20 12:10	57.2	↑2.1
4/20 12:20	59.2	↑2.0
4/20 12:30	61.1	↑1.9
4/20 12:40	62.8	↑1.7
4/20 12:50	64.4	↑1.6
4/20 13:00	65.9	↑1.5
4/20 13:10	67.2	↑1.3
4/20 13:20	68.3	↑1.1
4/20 13:30	69.2	↑0.9
4/20 13:40	70.0	↑0.8
4/20 13:50	70.6	↑0.6
4/20 14:00	71.1	↑0.5
4/20 14:10	71.3	↑0.2
4/20 14:20	71.4	↑0.1	満潮
4/20 14:30	71.3	↓-0.1
4/20 14:40	71.1	↓-0.2
4/20 14:50	70.7	↓-0.4
4/20 15:00	70.1	↓-0.6
4/20 15:10	69.4	↓-0.7
4/20 15:20	68.6	↓-0.8
4/20 15:30	67.6	↓-1.0
4/20 15:40	66.5	↓-1.1
4/20 15:50	65.3	↓-1.2
4/20 16:00	63.9	↓-1.4
4/20 16:10	62.4	↓-1.5
4/20 16:20	60.8	↓-1.6
4/20 16:30	59.1	↓-1.7
4/20 16:40	57.3	↓-1.8
4/20 16:50	55.4	↓-1.9
4/20 17:00	53.4	↓-2.0
4/20 17:10	51.4	↓-2.0
4/20 17:20	49.4	↓-2.0
4/20 17:30	47.2	↓-2.2
4/20 17:40	45.1	↓-2.1
4/20 17:50	43.0	↓-2.1
4/20 18:00	40.9	↓-2.1
4/20 18:10	38.7	↓-2.2
4/20 18:20	36.7	↓-2.0
4/20 18:30	34.6	↓-2.1
4/20 18:40	32.6	↓-2.0
4/20 18:50	30.7	↓-1.9
4/20 19:00	28.9	↓-1.8
4/20 19:10	27.2	↓-1.7
4/20 19:20	25.6	↓-1.6
4/20 19:30	24.0	↓-1.6
4/20 19:40	22.7	↓-1.3
4/20 19:50	21.4	↓-1.3
4/20 20:00	20.3	↓-1.1
4/20 20:10	19.4	↓-0.9
4/20 20:20	18.6	↓-0.8
4/20 20:30	18.1	↓-0.5
4/20 20:40	17.7	↓-0.4
4/20 20:50	17.5	↓-0.2	干潮
4/20 21:00	17.5	0
4/20 21:10	17.7	↑0.2
4/20 21:20	18.2	↑0.5
4/20 21:30	18.8	↑0.6
4/20 21:40	19.7	↑0.9
4/20 21:50	20.8	↑1.1
4/20 22:00	22.1	↑1.3
4/20 22:10	23.7	↑1.6
4/20 22:20	25.4	↑1.7
4/20 22:30	27.3	↑1.9
4/20 22:40	29.4	↑2.1
4/20 22:50	31.6	↑2.2
4/20 23:00	34.0	↑2.4
4/20 23:10	36.4	↑2.4
4/20 23:20	39.0	↑2.6
4/20 23:30	41.6	↑2.6
4/20 23:40	44.3	↑2.7	最大潮位差
4/20 23:50	46.9	↑2.6