20 (土)	06:24	09:35	16:12	-
	15cm	13cm	30cm	-
中潮 出 04:53 入 18:26 出 21:19 入 05:52

江差／桧山（北海道）2030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	-6.1	↑0.3
4/20 00:10	-5.8	↑0.3
4/20 00:20	-5.4	↑0.4
4/20 00:30	-4.9	↑0.5
4/20 00:40	-4.4	↑0.5
4/20 00:50	-3.8	↑0.6
4/20 01:00	-3.2	↑0.6
4/20 01:10	-2.6	↑0.6
4/20 01:20	-1.9	↑0.7
4/20 01:30	-1.1	↑0.8
4/20 01:40	-0.4	↑0.7
4/20 01:50	0.4	↑0.8
4/20 02:00	1.2	↑0.8
4/20 02:10	2.0	↑0.8
4/20 02:20	2.8	↑0.8
4/20 02:30	3.6	↑0.8
4/20 02:40	4.4	↑0.8
4/20 02:50	5.2	↑0.8
4/20 03:00	6.0	↑0.8
4/20 03:10	6.8	↑0.8
4/20 03:20	7.6	↑0.8
4/20 03:30	8.3	↑0.7
4/20 03:40	9.0	↑0.7
4/20 03:50	9.7	↑0.7
4/20 04:00	10.3	↑0.6
4/20 04:10	10.9	↑0.6
4/20 04:20	11.4	↑0.5
4/20 04:30	12.0	↑0.6
4/20 04:40	12.4	↑0.4
4/20 04:50	12.8	↑0.4
4/20 05:00	13.2	↑0.4
4/20 05:10	13.6	↑0.4
4/20 05:20	13.8	↑0.2
4/20 05:30	14.1	↑0.3
4/20 05:40	14.3	↑0.2
4/20 05:50	14.4	↑0.1
4/20 06:00	14.5	↑0.1
4/20 06:10	14.6	↑0.1
4/20 06:20	14.6	0	満潮
4/20 06:30	14.6	0
4/20 06:40	14.6	0
4/20 06:50	14.5	↓-0.1
4/20 07:00	14.4	↓-0.1
4/20 07:10	14.3	↓-0.1
4/20 07:20	14.1	↓-0.2
4/20 07:30	14.0	↓-0.1
4/20 07:40	13.8	↓-0.2
4/20 07:50	13.7	↓-0.1
4/20 08:00	13.5	↓-0.2
4/20 08:10	13.3	↓-0.2
4/20 08:20	13.1	↓-0.2
4/20 08:30	13.0	↓-0.1
4/20 08:40	12.8	↓-0.2
4/20 08:50	12.7	↓-0.1
4/20 09:00	12.6	↓-0.1
4/20 09:10	12.5	↓-0.1
4/20 09:20	12.4	↓-0.1
4/20 09:30	12.4	0	干潮
4/20 09:40	12.4	0
4/20 09:50	12.5	↑0.1
4/20 10:00	12.5	0
4/20 10:10	12.7	↑0.2
4/20 10:20	12.8	↑0.1
4/20 10:30	13.0	↑0.2
4/20 10:40	13.2	↑0.2
4/20 10:50	13.5	↑0.3
4/20 11:00	13.8	↑0.3
4/20 11:10	14.2	↑0.4
4/20 11:20	14.6	↑0.4
4/20 11:30	15.1	↑0.5
4/20 11:40	15.6	↑0.5
4/20 11:50	16.1	↑0.5
4/20 12:00	16.6	↑0.5
4/20 12:10	17.2	↑0.6
4/20 12:20	17.8	↑0.6
4/20 12:30	18.5	↑0.7
4/20 12:40	19.1	↑0.6
4/20 12:50	19.8	↑0.7
4/20 13:00	20.5	↑0.7
4/20 13:10	21.1	↑0.6
4/20 13:20	21.8	↑0.7
4/20 13:30	22.5	↑0.7
4/20 13:40	23.2	↑0.7
4/20 13:50	23.9	↑0.7
4/20 14:00	24.6	↑0.7
4/20 14:10	25.2	↑0.6
4/20 14:20	25.8	↑0.6
4/20 14:30	26.4	↑0.6
4/20 14:40	26.9	↑0.5
4/20 14:50	27.4	↑0.5
4/20 15:00	27.9	↑0.5
4/20 15:10	28.3	↑0.4
4/20 15:20	28.6	↑0.3
4/20 15:30	28.9	↑0.3
4/20 15:40	29.2	↑0.3
4/20 15:50	29.4	↑0.2
4/20 16:00	29.5	↑0.1
4/20 16:10	29.5	0	満潮
4/20 16:20	29.5	0
4/20 16:30	29.4	↓-0.1
4/20 16:40	29.2	↓-0.2
4/20 16:50	29.0	↓-0.2
4/20 17:00	28.6	↓-0.4
4/20 17:10	28.2	↓-0.4
4/20 17:20	27.8	↓-0.4
4/20 17:30	27.2	↓-0.6
4/20 17:40	26.6	↓-0.6
4/20 17:50	25.9	↓-0.7
4/20 18:00	25.2	↓-0.7
4/20 18:10	24.4	↓-0.8
4/20 18:20	23.5	↓-0.9
4/20 18:30	22.6	↓-0.9
4/20 18:40	21.6	↓-1.0
4/20 18:50	20.6	↓-1.0
4/20 19:00	19.5	↓-1.1
4/20 19:10	18.4	↓-1.1
4/20 19:20	17.3	↓-1.1
4/20 19:30	16.1	↓-1.2
4/20 19:40	14.9	↓-1.2
4/20 19:50	13.7	↓-1.2
4/20 20:00	12.4	↓-1.3	最大潮位差
4/20 20:10	11.2	↓-1.2
4/20 20:20	10.0	↓-1.2
4/20 20:30	8.8	↓-1.2
4/20 20:40	7.5	↓-1.3	最大潮位差
4/20 20:50	6.3	↓-1.2
4/20 21:00	5.2	↓-1.1
4/20 21:10	4.0	↓-1.2
4/20 21:20	2.9	↓-1.1
4/20 21:30	1.8	↓-1.1
4/20 21:40	0.8	↓-1.0
4/20 21:50	-0.2	↓-1.0
4/20 22:00	-1.1	↓-0.9
4/20 22:10	-2.0	↓-0.9
4/20 22:20	-2.8	↓-0.8
4/20 22:30	-3.5	↓-0.7
4/20 22:40	-4.2	↓-0.7
4/20 22:50	-4.8	↓-0.6
4/20 23:00	-5.4	↓-0.6
4/20 23:10	-5.9	↓-0.5
4/20 23:20	-6.3	↓-0.4
4/20 23:30	-6.6	↓-0.3
4/20 23:40	-6.8	↓-0.2
4/20 23:50	-7.0	↓-0.2