21 (日)	09:10	01:59	-	17:15
	74cm	48cm	-	27cm
長潮 出 06:25 入 17:19 出 11:11 入 01:39

函館（北海道）2021年02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
2/21 00:00	50.8	↓-0.4
2/21 00:10	50.4	↓-0.4
2/21 00:20	50.1	↓-0.3
2/21 00:30	49.7	↓-0.4
2/21 00:40	49.4	↓-0.3
2/21 00:50	49.1	↓-0.3
2/21 01:00	48.8	↓-0.3
2/21 01:10	48.5	↓-0.3
2/21 01:20	48.3	↓-0.2
2/21 01:30	48.1	↓-0.2
2/21 01:40	47.9	↓-0.2
2/21 01:50	47.9	0	干潮
2/21 02:00	47.8	↓-0.1
2/21 02:10	47.9	↑0.1
2/21 02:20	48.0	↑0.1
2/21 02:30	48.2	↑0.2
2/21 02:40	48.4	↑0.2
2/21 02:50	48.8	↑0.4
2/21 03:00	49.2	↑0.4
2/21 03:10	49.7	↑0.5
2/21 03:20	50.3	↑0.6
2/21 03:30	50.9	↑0.6
2/21 03:40	51.6	↑0.7
2/21 03:50	52.4	↑0.8
2/21 04:00	53.2	↑0.8
2/21 04:10	54.0	↑0.8
2/21 04:20	54.9	↑0.9
2/21 04:30	55.8	↑0.9
2/21 04:40	56.8	↑1.0
2/21 04:50	57.7	↑0.9
2/21 05:00	58.7	↑1.0
2/21 05:10	59.6	↑0.9
2/21 05:20	60.5	↑0.9
2/21 05:30	61.4	↑0.9
2/21 05:40	62.3	↑0.9
2/21 05:50	63.2	↑0.9
2/21 06:00	64.0	↑0.8
2/21 06:10	64.8	↑0.8
2/21 06:20	65.5	↑0.7
2/21 06:30	66.3	↑0.8
2/21 06:40	67.0	↑0.7
2/21 06:50	67.7	↑0.7
2/21 07:00	68.3	↑0.6
2/21 07:10	69.0	↑0.7
2/21 07:20	69.6	↑0.6
2/21 07:30	70.2	↑0.6
2/21 07:40	70.7	↑0.5
2/21 07:50	71.2	↑0.5
2/21 08:00	71.7	↑0.5
2/21 08:10	72.1	↑0.4
2/21 08:20	72.5	↑0.4
2/21 08:30	72.8	↑0.3
2/21 08:40	73.1	↑0.3
2/21 08:50	73.3	↑0.2
2/21 09:00	73.4	↑0.1	満潮
2/21 09:10	73.4	0	満潮
2/21 09:20	73.4	0
2/21 09:30	73.2	↓-0.2
2/21 09:40	73.0	↓-0.2
2/21 09:50	72.6	↓-0.4
2/21 10:00	72.2	↓-0.4
2/21 10:10	71.6	↓-0.6
2/21 10:20	70.9	↓-0.7
2/21 10:30	70.2	↓-0.7
2/21 10:40	69.3	↓-0.9
2/21 10:50	68.3	↓-1.0
2/21 11:00	67.3	↓-1.0
2/21 11:10	66.2	↓-1.1
2/21 11:20	65.0	↓-1.2
2/21 11:30	63.7	↓-1.3
2/21 11:40	62.4	↓-1.3
2/21 11:50	61.0	↓-1.4
2/21 12:00	59.5	↓-1.5
2/21 12:10	58.1	↓-1.4
2/21 12:20	56.6	↓-1.5
2/21 12:30	55.0	↓-1.6	最大潮位差
2/21 12:40	53.5	↓-1.5
2/21 12:50	51.9	↓-1.6	最大潮位差
2/21 13:00	50.4	↓-1.5
2/21 13:10	48.8	↓-1.6	最大潮位差
2/21 13:20	47.2	↓-1.6	最大潮位差
2/21 13:30	45.7	↓-1.5
2/21 13:40	44.2	↓-1.5
2/21 13:50	42.7	↓-1.5
2/21 14:00	41.2	↓-1.5
2/21 14:10	39.8	↓-1.4
2/21 14:20	38.4	↓-1.4
2/21 14:30	37.1	↓-1.3
2/21 14:40	35.9	↓-1.2
2/21 14:50	34.7	↓-1.2
2/21 15:00	33.6	↓-1.1
2/21 15:10	32.6	↓-1.0
2/21 15:20	31.6	↓-1.0
2/21 15:30	30.8	↓-0.8
2/21 15:40	30.0	↓-0.8
2/21 15:50	29.3	↓-0.7
2/21 16:00	28.8	↓-0.5
2/21 16:10	28.3	↓-0.5
2/21 16:20	27.8	↓-0.5
2/21 16:30	27.5	↓-0.3
2/21 16:40	27.3	↓-0.2
2/21 16:50	27.1	↓-0.2
2/21 17:00	27.0	↓-0.1
2/21 17:10	26.9	↓-0.1	干潮
2/21 17:20	26.9	0
2/21 17:30	27.0	↑0.1
2/21 17:40	27.1	↑0.1
2/21 17:50	27.2	↑0.1
2/21 18:00	27.5	↑0.3
2/21 18:10	27.7	↑0.2
2/21 18:20	28.0	↑0.3
2/21 18:30	28.4	↑0.4
2/21 18:40	28.8	↑0.4
2/21 18:50	29.3	↑0.5
2/21 19:00	29.8	↑0.5
2/21 19:10	30.4	↑0.6
2/21 19:20	31.1	↑0.7
2/21 19:30	31.8	↑0.7
2/21 19:40	32.6	↑0.8
2/21 19:50	33.4	↑0.8
2/21 20:00	34.3	↑0.9
2/21 20:10	35.2	↑0.9
2/21 20:20	36.2	↑1.0
2/21 20:30	37.2	↑1.0
2/21 20:40	38.3	↑1.1
2/21 20:50	39.4	↑1.1
2/21 21:00	40.5	↑1.1
2/21 21:10	41.5	↑1.0
2/21 21:20	42.6	↑1.1
2/21 21:30	43.7	↑1.1
2/21 21:40	44.7	↑1.0
2/21 21:50	45.7	↑1.0
2/21 22:00	46.7	↑1.0
2/21 22:10	47.6	↑0.9
2/21 22:20	48.4	↑0.8
2/21 22:30	49.2	↑0.8
2/21 22:40	49.9	↑0.7
2/21 22:50	50.5	↑0.6
2/21 23:00	51.1	↑0.6
2/21 23:10	51.6	↑0.5
2/21 23:20	52.0	↑0.4
2/21 23:30	52.4	↑0.4
2/21 23:40	52.8	↑0.4
2/21 23:50	53.0	↑0.2