20 (土)	05:19	11:58	18:03	23:52
	100cm	38cm	84cm	46cm
中潮 出 03:57 入 18:59 出 21:20 入 09:43

コイセボイ（北海道）2030年07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
7/20 00:00	49.8	↑0.9
7/20 00:10	51.0	↑1.2
7/20 00:20	52.3	↑1.3
7/20 00:30	53.7	↑1.4
7/20 00:40	55.2	↑1.5
7/20 00:50	56.9	↑1.7
7/20 01:00	58.7	↑1.8
7/20 01:10	60.6	↑1.9
7/20 01:20	62.5	↑1.9
7/20 01:30	64.6	↑2.1
7/20 01:40	66.7	↑2.1
7/20 01:50	68.8	↑2.1
7/20 02:00	71.0	↑2.2
7/20 02:10	73.2	↑2.2
7/20 02:20	75.4	↑2.2
7/20 02:30	77.5	↑2.1
7/20 02:40	79.7	↑2.2
7/20 02:50	81.8	↑2.1
7/20 03:00	83.9	↑2.1
7/20 03:10	85.8	↑1.9
7/20 03:20	87.7	↑1.9
7/20 03:30	89.5	↑1.8
7/20 03:40	91.2	↑1.7
7/20 03:50	92.8	↑1.6
7/20 04:00	94.2	↑1.4
7/20 04:10	95.5	↑1.3
7/20 04:20	96.6	↑1.1
7/20 04:30	97.6	↑1.0
7/20 04:40	98.3	↑0.7
7/20 04:50	99.0	↑0.7
7/20 05:00	99.4	↑0.4
7/20 05:10	99.6	↑0.2	満潮
7/20 05:20	99.7	↑0.1
7/20 05:30	99.5	↓-0.2
7/20 05:40	99.2	↓-0.3
7/20 05:50	98.7	↓-0.5
7/20 06:00	98.0	↓-0.7
7/20 06:10	97.1	↓-0.9
7/20 06:20	96.1	↓-1.0
7/20 06:30	94.8	↓-1.3
7/20 06:40	93.4	↓-1.4
7/20 06:50	91.9	↓-1.5
7/20 07:00	90.2	↓-1.7
7/20 07:10	88.3	↓-1.9
7/20 07:20	86.4	↓-1.9
7/20 07:30	84.3	↓-2.1
7/20 07:40	82.2	↓-2.1
7/20 07:50	79.9	↓-2.3
7/20 08:00	77.6	↓-2.3
7/20 08:10	75.2	↓-2.4
7/20 08:20	72.8	↓-2.4
7/20 08:30	70.4	↓-2.4
7/20 08:40	67.9	↓-2.5	最大潮位差
7/20 08:50	65.5	↓-2.4
7/20 09:00	63.1	↓-2.4
7/20 09:10	60.7	↓-2.4
7/20 09:20	58.3	↓-2.4
7/20 09:30	56.1	↓-2.2
7/20 09:40	53.9	↓-2.2
7/20 09:50	51.8	↓-2.1
7/20 10:00	49.8	↓-2.0
7/20 10:10	48.0	↓-1.8
7/20 10:20	46.2	↓-1.8
7/20 10:30	44.6	↓-1.6
7/20 10:40	43.2	↓-1.4
7/20 10:50	41.9	↓-1.3
7/20 11:00	40.8	↓-1.1
7/20 11:10	39.9	↓-0.9
7/20 11:20	39.1	↓-0.8
7/20 11:30	38.5	↓-0.6
7/20 11:40	38.1	↓-0.4
7/20 11:50	37.9	↓-0.2	干潮
7/20 12:00	37.8	↓-0.1
7/20 12:10	38.0	↑0.2
7/20 12:20	38.3	↑0.3
7/20 12:30	38.8	↑0.5
7/20 12:40	39.4	↑0.6
7/20 12:50	40.3	↑0.9
7/20 13:00	41.2	↑0.9
7/20 13:10	42.4	↑1.2
7/20 13:20	43.6	↑1.2
7/20 13:30	45.0	↑1.4
7/20 13:40	46.5	↑1.5
7/20 13:50	48.1	↑1.6
7/20 14:00	49.8	↑1.7
7/20 14:10	51.6	↑1.8
7/20 14:20	53.5	↑1.9
7/20 14:30	55.4	↑1.9
7/20 14:40	57.3	↑1.9
7/20 14:50	59.3	↑2.0
7/20 15:00	61.2	↑1.9
7/20 15:10	63.2	↑2.0
7/20 15:20	65.1	↑1.9
7/20 15:30	67.0	↑1.9
7/20 15:40	68.8	↑1.8
7/20 15:50	70.6	↑1.8
7/20 16:00	72.3	↑1.7
7/20 16:10	74.0	↑1.7
7/20 16:20	75.5	↑1.5
7/20 16:30	76.9	↑1.4
7/20 16:40	78.2	↑1.3
7/20 16:50	79.3	↑1.1
7/20 17:00	80.4	↑1.1
7/20 17:10	81.3	↑0.9
7/20 17:20	82.0	↑0.7
7/20 17:30	82.6	↑0.6
7/20 17:40	83.0	↑0.4
7/20 17:50	83.3	↑0.3
7/20 18:00	83.4	↑0.1	満潮
7/20 18:10	83.4	0
7/20 18:20	83.2	↓-0.2
7/20 18:30	82.8	↓-0.4
7/20 18:40	82.3	↓-0.5
7/20 18:50	81.7	↓-0.6
7/20 19:00	80.9	↓-0.8
7/20 19:10	80.0	↓-0.9
7/20 19:20	78.9	↓-1.1
7/20 19:30	77.7	↓-1.2
7/20 19:40	76.5	↓-1.2
7/20 19:50	75.1	↓-1.4
7/20 20:00	73.7	↓-1.4
7/20 20:10	72.1	↓-1.6
7/20 20:20	70.6	↓-1.5
7/20 20:30	68.9	↓-1.7
7/20 20:40	67.3	↓-1.6
7/20 20:50	65.6	↓-1.7
7/20 21:00	63.9	↓-1.7
7/20 21:10	62.2	↓-1.7
7/20 21:20	60.5	↓-1.7
7/20 21:30	58.9	↓-1.6
7/20 21:40	57.3	↓-1.6
7/20 21:50	55.8	↓-1.5
7/20 22:00	54.3	↓-1.5
7/20 22:10	52.9	↓-1.4
7/20 22:20	51.7	↓-1.2
7/20 22:30	50.5	↓-1.2
7/20 22:40	49.4	↓-1.1
7/20 22:50	48.5	↓-0.9
7/20 23:00	47.6	↓-0.9
7/20 23:10	46.9	↓-0.7
7/20 23:20	46.4	↓-0.5
7/20 23:30	46.0	↓-0.4
7/20 23:40	45.8	↓-0.2
7/20 23:50	45.7	↓-0.1	干潮