21 (水)	07:46	00:26	17:05	09:30
	12cm	-6cm	32cm	12cm
中潮 出 04:51 入 18:27 出 22:13 入 06:44

江差／桧山（北海道）2049年04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
4/21 00:00	-6.6	↓-0.2
4/21 00:10	-6.7	↓-0.1
4/21 00:20	-6.8	↓-0.1	干潮
4/21 00:30	-6.8	0
4/21 00:40	-6.7	↑0.1
4/21 00:50	-6.6	↑0.1
4/21 01:00	-6.4	↑0.2
4/21 01:10	-6.1	↑0.3
4/21 01:20	-5.8	↑0.3
4/21 01:30	-5.4	↑0.4
4/21 01:40	-5.0	↑0.4
4/21 01:50	-4.6	↑0.4
4/21 02:00	-4.0	↑0.6
4/21 02:10	-3.5	↑0.5
4/21 02:20	-2.9	↑0.6
4/21 02:30	-2.3	↑0.6
4/21 02:40	-1.6	↑0.7
4/21 02:50	-1.0	↑0.6
4/21 03:00	-0.3	↑0.7
4/21 03:10	0.4	↑0.7
4/21 03:20	1.1	↑0.7
4/21 03:30	1.8	↑0.7
4/21 03:40	2.5	↑0.7
4/21 03:50	3.2	↑0.7
4/21 04:00	3.9	↑0.7
4/21 04:10	4.6	↑0.7
4/21 04:20	5.2	↑0.6
4/21 04:30	5.8	↑0.6
4/21 04:40	6.5	↑0.7
4/21 04:50	7.0	↑0.5
4/21 05:00	7.6	↑0.6
4/21 05:10	8.1	↑0.5
4/21 05:20	8.6	↑0.5
4/21 05:30	9.0	↑0.4
4/21 05:40	9.4	↑0.4
4/21 05:50	9.8	↑0.4
4/21 06:00	10.2	↑0.4
4/21 06:10	10.5	↑0.3
4/21 06:20	10.7	↑0.2
4/21 06:30	10.9	↑0.2
4/21 06:40	11.1	↑0.2
4/21 06:50	11.3	↑0.2
4/21 07:00	11.4	↑0.1
4/21 07:10	11.5	↑0.1
4/21 07:20	11.6	↑0.1
4/21 07:30	11.6	0
4/21 07:40	11.7	↑0.1	満潮
4/21 07:50	11.7	0
4/21 08:00	11.6	↓-0.1
4/21 08:10	11.6	0
4/21 08:20	11.6	0
4/21 08:30	11.5	↓-0.1
4/21 08:40	11.5	0
4/21 08:50	11.4	↓-0.1
4/21 09:00	11.4	0
4/21 09:10	11.4	0
4/21 09:20	11.3	↓-0.1	干潮
4/21 09:30	11.3	0	干潮
4/21 09:40	11.3	0
4/21 09:50	11.4	↑0.1
4/21 10:00	11.4	0
4/21 10:10	11.5	↑0.1
4/21 10:20	11.6	↑0.1
4/21 10:30	11.8	↑0.2
4/21 10:40	12.0	↑0.2
4/21 10:50	12.2	↑0.2
4/21 11:00	12.4	↑0.2
4/21 11:10	12.7	↑0.3
4/21 11:20	13.0	↑0.3
4/21 11:30	13.4	↑0.4
4/21 11:40	13.8	↑0.4
4/21 11:50	14.3	↑0.5
4/21 12:00	14.7	↑0.4
4/21 12:10	15.3	↑0.6
4/21 12:20	15.8	↑0.5
4/21 12:30	16.4	↑0.6
4/21 12:40	17.0	↑0.6
4/21 12:50	17.7	↑0.7
4/21 13:00	18.3	↑0.6
4/21 13:10	19.0	↑0.7
4/21 13:20	19.7	↑0.7
4/21 13:30	20.5	↑0.8
4/21 13:40	21.2	↑0.7
4/21 13:50	21.9	↑0.7
4/21 14:00	22.7	↑0.8
4/21 14:10	23.4	↑0.7
4/21 14:20	24.2	↑0.8
4/21 14:30	24.9	↑0.7
4/21 14:40	25.6	↑0.7
4/21 14:50	26.3	↑0.7
4/21 15:00	27.0	↑0.7
4/21 15:10	27.7	↑0.7
4/21 15:20	28.3	↑0.6
4/21 15:30	28.8	↑0.5
4/21 15:40	29.4	↑0.6
4/21 15:50	29.9	↑0.5
4/21 16:00	30.3	↑0.4
4/21 16:10	30.7	↑0.4
4/21 16:20	31.0	↑0.3
4/21 16:30	31.3	↑0.3
4/21 16:40	31.5	↑0.2
4/21 16:50	31.6	↑0.1
4/21 17:00	31.7	↑0.1	満潮
4/21 17:10	31.7	0
4/21 17:20	31.6	↓-0.1
4/21 17:30	31.4	↓-0.2
4/21 17:40	31.2	↓-0.2
4/21 17:50	30.9	↓-0.3
4/21 18:00	30.6	↓-0.3
4/21 18:10	30.1	↓-0.5
4/21 18:20	29.6	↓-0.5
4/21 18:30	29.0	↓-0.6
4/21 18:40	28.4	↓-0.6
4/21 18:50	27.7	↓-0.7
4/21 19:00	26.9	↓-0.8
4/21 19:10	26.0	↓-0.9
4/21 19:20	25.1	↓-0.9
4/21 19:30	24.2	↓-0.9
4/21 19:40	23.2	↓-1.0
4/21 19:50	22.2	↓-1.0
4/21 20:00	21.1	↓-1.1
4/21 20:10	20.0	↓-1.1
4/21 20:20	18.8	↓-1.2
4/21 20:30	17.6	↓-1.2
4/21 20:40	16.4	↓-1.2
4/21 20:50	15.2	↓-1.2
4/21 21:00	14.0	↓-1.2
4/21 21:10	12.8	↓-1.2
4/21 21:20	11.6	↓-1.2
4/21 21:30	10.3	↓-1.3	最大潮位差
4/21 21:40	9.1	↓-1.2
4/21 21:50	8.0	↓-1.1
4/21 22:00	6.8	↓-1.2
4/21 22:10	5.7	↓-1.1
4/21 22:20	4.6	↓-1.1
4/21 22:30	3.5	↓-1.1
4/21 22:40	2.5	↓-1.0
4/21 22:50	1.5	↓-1.0
4/21 23:00	0.5	↓-1.0
4/21 23:10	-0.3	↓-0.8
4/21 23:20	-1.1	↓-0.8
4/21 23:30	-1.9	↓-0.8
4/21 23:40	-2.6	↓-0.7
4/21 23:50	-3.2	↓-0.6