20 (水)	01:47	05:53	12:25	19:37
	60cm	51cm	84cm	30cm
中潮 出 04:31 入 18:11 出 03:34 入 14:47

コイセボイ（北海道）2039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	↑0.9
4/20 00:10	55.6	↑0.8
4/20 00:20	56.3	↑0.7
4/20 00:30	57.0	↑0.7
4/20 00:40	57.6	↑0.6
4/20 00:50	58.1	↑0.5
4/20 01:00	58.5	↑0.4
4/20 01:10	58.8	↑0.3
4/20 01:20	59.1	↑0.3
4/20 01:30	59.2	↑0.1
4/20 01:40	59.3	↑0.1	満潮
4/20 01:50	59.3	0
4/20 02:00	59.2	↓-0.1
4/20 02:10	59.1	↓-0.1
4/20 02:20	58.9	↓-0.2
4/20 02:30	58.6	↓-0.3
4/20 02:40	58.3	↓-0.3
4/20 02:50	57.9	↓-0.4
4/20 03:00	57.5	↓-0.4
4/20 03:10	57.1	↓-0.4
4/20 03:20	56.6	↓-0.5
4/20 03:30	56.1	↓-0.5
4/20 03:40	55.6	↓-0.5
4/20 03:50	55.1	↓-0.5
4/20 04:00	54.5	↓-0.6
4/20 04:10	54.0	↓-0.5
4/20 04:20	53.5	↓-0.5
4/20 04:30	53.1	↓-0.4
4/20 04:40	52.6	↓-0.5
4/20 04:50	52.2	↓-0.4
4/20 05:00	51.8	↓-0.4
4/20 05:10	51.5	↓-0.3
4/20 05:20	51.3	↓-0.2
4/20 05:30	51.1	↓-0.2
4/20 05:40	51.0	↓-0.1
4/20 05:50	50.9	↓-0.1	干潮
4/20 06:00	50.9	0
4/20 06:10	51.1	↑0.2
4/20 06:20	51.2	↑0.1
4/20 06:30	51.5	↑0.3
4/20 06:40	51.9	↑0.4
4/20 06:50	52.3	↑0.4
4/20 07:00	52.8	↑0.5
4/20 07:10	53.5	↑0.7
4/20 07:20	54.2	↑0.7
4/20 07:30	54.9	↑0.7
4/20 07:40	55.8	↑0.9
4/20 07:50	56.7	↑0.9
4/20 08:00	57.7	↑1.0
4/20 08:10	58.8	↑1.1
4/20 08:20	59.9	↑1.1
4/20 08:30	61.1	↑1.2
4/20 08:40	62.4	↑1.3
4/20 08:50	63.6	↑1.2
4/20 09:00	64.9	↑1.3
4/20 09:10	66.2	↑1.3
4/20 09:20	67.6	↑1.4
4/20 09:30	68.9	↑1.3
4/20 09:40	70.3	↑1.4
4/20 09:50	71.6	↑1.3
4/20 10:00	72.9	↑1.3
4/20 10:10	74.2	↑1.3
4/20 10:20	75.4	↑1.2
4/20 10:30	76.6	↑1.2
4/20 10:40	77.7	↑1.1
4/20 10:50	78.7	↑1.0
4/20 11:00	79.7	↑1.0
4/20 11:10	80.6	↑0.9
4/20 11:20	81.4	↑0.8
4/20 11:30	82.1	↑0.7
4/20 11:40	82.7	↑0.6
4/20 11:50	83.2	↑0.5
4/20 12:00	83.5	↑0.3
4/20 12:10	83.8	↑0.3
4/20 12:20	83.9	↑0.1	満潮
4/20 12:30	83.9	0
4/20 12:40	83.7	↓-0.2
4/20 12:50	83.5	↓-0.2
4/20 13:00	83.1	↓-0.4
4/20 13:10	82.5	↓-0.6
4/20 13:20	81.8	↓-0.7
4/20 13:30	81.0	↓-0.8
4/20 13:40	80.1	↓-0.9
4/20 13:50	79.0	↓-1.1
4/20 14:00	77.9	↓-1.1
4/20 14:10	76.6	↓-1.3
4/20 14:20	75.2	↓-1.4
4/20 14:30	73.7	↓-1.5
4/20 14:40	72.1	↓-1.6
4/20 14:50	70.4	↓-1.7
4/20 15:00	68.6	↓-1.8
4/20 15:10	66.8	↓-1.8
4/20 15:20	64.9	↓-1.9
4/20 15:30	63.0	↓-1.9
4/20 15:40	61.0	↓-2.0
4/20 15:50	59.1	↓-1.9
4/20 16:00	57.0	↓-2.1	最大潮位差
4/20 16:10	55.0	↓-2.0
4/20 16:20	53.0	↓-2.0
4/20 16:30	51.0	↓-2.0
4/20 16:40	49.1	↓-1.9
4/20 16:50	47.2	↓-1.9
4/20 17:00	45.3	↓-1.9
4/20 17:10	43.5	↓-1.8
4/20 17:20	41.8	↓-1.7
4/20 17:30	40.1	↓-1.7
4/20 17:40	38.6	↓-1.5
4/20 17:50	37.1	↓-1.5
4/20 18:00	35.8	↓-1.3
4/20 18:10	34.5	↓-1.3
4/20 18:20	33.4	↓-1.1
4/20 18:30	32.4	↓-1.0
4/20 18:40	31.6	↓-0.8
4/20 18:50	30.9	↓-0.7
4/20 19:00	30.3	↓-0.6
4/20 19:10	29.9	↓-0.4
4/20 19:20	29.6	↓-0.3
4/20 19:30	29.4	↓-0.2	干潮
4/20 19:40	29.4	0
4/20 19:50	29.5	↑0.1
4/20 20:00	29.8	↑0.3
4/20 20:10	30.2	↑0.4
4/20 20:20	30.7	↑0.5
4/20 20:30	31.4	↑0.7
4/20 20:40	32.2	↑0.8
4/20 20:50	33.1	↑0.9
4/20 21:00	34.1	↑1.0
4/20 21:10	35.1	↑1.0
4/20 21:20	36.3	↑1.2
4/20 21:30	37.6	↑1.3
4/20 21:40	38.9	↑1.3
4/20 21:50	40.3	↑1.4
4/20 22:00	41.7	↑1.4
4/20 22:10	43.2	↑1.5
4/20 22:20	44.7	↑1.5
4/20 22:30	46.2	↑1.5
4/20 22:40	47.8	↑1.6
4/20 22:50	49.3	↑1.5
4/20 23:00	50.8	↑1.5
4/20 23:10	52.2	↑1.4
4/20 23:20	53.7	↑1.5
4/20 23:30	55.1	↑1.4
4/20 23:40	56.4	↑1.3
4/20 23:50	57.6	↑1.2