20 (火)	03:16	09:20	14:21	21:08
	23cm	10cm	18cm	-2cm
大潮 出 04:53 入 18:25 出 17:55 入 04:01

江差／桧山（北海道）2027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	13.4	↑0.8
4/20 00:10	14.2	↑0.8
4/20 00:20	15.0	↑0.8
4/20 00:30	15.8	↑0.8
4/20 00:40	16.5	↑0.7
4/20 00:50	17.3	↑0.8
4/20 01:00	18.0	↑0.7
4/20 01:10	18.6	↑0.6
4/20 01:20	19.2	↑0.6
4/20 01:30	19.8	↑0.6
4/20 01:40	20.3	↑0.5
4/20 01:50	20.8	↑0.5
4/20 02:00	21.3	↑0.5
4/20 02:10	21.7	↑0.4
4/20 02:20	22.0	↑0.3
4/20 02:30	22.3	↑0.3
4/20 02:40	22.5	↑0.2
4/20 02:50	22.7	↑0.2
4/20 03:00	22.8	↑0.1
4/20 03:10	22.8	0	満潮
4/20 03:20	22.8	0
4/20 03:30	22.8	0
4/20 03:40	22.7	↓-0.1
4/20 03:50	22.5	↓-0.2
4/20 04:00	22.3	↓-0.2
4/20 04:10	22.0	↓-0.3
4/20 04:20	21.7	↓-0.3
4/20 04:30	21.4	↓-0.3
4/20 04:40	21.0	↓-0.4
4/20 04:50	20.6	↓-0.4
4/20 05:00	20.1	↓-0.5
4/20 05:10	19.6	↓-0.5
4/20 05:20	19.1	↓-0.5
4/20 05:30	18.6	↓-0.5
4/20 05:40	18.0	↓-0.6
4/20 05:50	17.4	↓-0.6
4/20 06:00	16.9	↓-0.5
4/20 06:10	16.3	↓-0.6
4/20 06:20	15.7	↓-0.6
4/20 06:30	15.1	↓-0.6
4/20 06:40	14.6	↓-0.5
4/20 06:50	14.0	↓-0.6
4/20 07:00	13.5	↓-0.5
4/20 07:10	12.9	↓-0.6
4/20 07:20	12.4	↓-0.5
4/20 07:30	12.0	↓-0.4
4/20 07:40	11.5	↓-0.5
4/20 07:50	11.1	↓-0.4
4/20 08:00	10.8	↓-0.3
4/20 08:10	10.5	↓-0.3
4/20 08:20	10.2	↓-0.3
4/20 08:30	9.9	↓-0.3
4/20 08:40	9.7	↓-0.2
4/20 08:50	9.6	↓-0.1
4/20 09:00	9.5	↓-0.1
4/20 09:10	9.4	↓-0.1	干潮
4/20 09:20	9.4	0	干潮
4/20 09:30	9.4	0
4/20 09:40	9.5	↑0.1
4/20 09:50	9.6	↑0.1
4/20 10:00	9.8	↑0.2
4/20 10:10	10.0	↑0.2
4/20 10:20	10.2	↑0.2
4/20 10:30	10.5	↑0.3
4/20 10:40	10.8	↑0.3
4/20 10:50	11.1	↑0.3
4/20 11:00	11.4	↑0.3
4/20 11:10	11.8	↑0.4
4/20 11:20	12.2	↑0.4
4/20 11:30	12.6	↑0.4
4/20 11:40	13.0	↑0.4
4/20 11:50	13.4	↑0.4
4/20 12:00	13.8	↑0.4
4/20 12:10	14.2	↑0.4
4/20 12:20	14.6	↑0.4
4/20 12:30	15.0	↑0.4
4/20 12:40	15.4	↑0.4
4/20 12:50	15.8	↑0.4
4/20 13:00	16.1	↑0.3
4/20 13:10	16.4	↑0.3
4/20 13:20	16.7	↑0.3
4/20 13:30	16.9	↑0.2
4/20 13:40	17.1	↑0.2
4/20 13:50	17.3	↑0.2
4/20 14:00	17.4	↑0.1
4/20 14:10	17.5	↑0.1
4/20 14:20	17.5	0	満潮
4/20 14:30	17.5	0
4/20 14:40	17.4	↓-0.1
4/20 14:50	17.3	↓-0.1
4/20 15:00	17.1	↓-0.2
4/20 15:10	16.9	↓-0.2
4/20 15:20	16.6	↓-0.3
4/20 15:30	16.3	↓-0.3
4/20 15:40	15.9	↓-0.4
4/20 15:50	15.4	↓-0.5
4/20 16:00	15.0	↓-0.4
4/20 16:10	14.4	↓-0.6
4/20 16:20	13.9	↓-0.5
4/20 16:30	13.3	↓-0.6
4/20 16:40	12.6	↓-0.7
4/20 16:50	12.0	↓-0.6
4/20 17:00	11.3	↓-0.7
4/20 17:10	10.5	↓-0.8
4/20 17:20	9.8	↓-0.7
4/20 17:30	9.0	↓-0.8
4/20 17:40	8.3	↓-0.7
4/20 17:50	7.5	↓-0.8
4/20 18:00	6.7	↓-0.8
4/20 18:10	5.9	↓-0.8
4/20 18:20	5.2	↓-0.7
4/20 18:30	4.4	↓-0.8
4/20 18:40	3.7	↓-0.7
4/20 18:50	3.0	↓-0.7
4/20 19:00	2.3	↓-0.7
4/20 19:10	1.6	↓-0.7
4/20 19:20	1.0	↓-0.6
4/20 19:30	0.4	↓-0.6
4/20 19:40	-0.1	↓-0.5
4/20 19:50	-0.6	↓-0.5
4/20 20:00	-1.1	↓-0.5
4/20 20:10	-1.4	↓-0.3
4/20 20:20	-1.8	↓-0.4
4/20 20:30	-2.0	↓-0.2
4/20 20:40	-2.2	↓-0.2
4/20 20:50	-2.4	↓-0.2
4/20 21:00	-2.5	↓-0.1	干潮
4/20 21:10	-2.5	0
4/20 21:20	-2.4	↑0.1
4/20 21:30	-2.3	↑0.1
4/20 21:40	-2.1	↑0.2
4/20 21:50	-1.9	↑0.2
4/20 22:00	-1.6	↑0.3
4/20 22:10	-1.2	↑0.4
4/20 22:20	-0.8	↑0.4
4/20 22:30	-0.3	↑0.5
4/20 22:40	0.3	↑0.6
4/20 22:50	0.9	↑0.6
4/20 23:00	1.5	↑0.6
4/20 23:10	2.2	↑0.7
4/20 23:20	2.9	↑0.7
4/20 23:30	3.7	↑0.8
4/20 23:40	4.4	↑0.7
4/20 23:50	5.3	↑0.9	最大潮位差