20 (日)	03:11	10:17	16:40	21:21
	98cm	10cm	69cm	45cm
大潮 出 04:30 入 18:12 出 05:34 入 19:49 潮干狩り ◎ 08:22～12:18

コイセボイ（北海道）2053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	68.1	↑2.3
4/20 00:10	70.4	↑2.3
4/20 00:20	72.7	↑2.3
4/20 00:30	75.1	↑2.4
4/20 00:40	77.4	↑2.3
4/20 00:50	79.6	↑2.2
4/20 01:00	81.8	↑2.2
4/20 01:10	83.9	↑2.1
4/20 01:20	85.9	↑2.0
4/20 01:30	87.8	↑1.9
4/20 01:40	89.6	↑1.8
4/20 01:50	91.3	↑1.7
4/20 02:00	92.7	↑1.4
4/20 02:10	94.1	↑1.4
4/20 02:20	95.2	↑1.1
4/20 02:30	96.2	↑1.0
4/20 02:40	96.9	↑0.7
4/20 02:50	97.5	↑0.6
4/20 03:00	97.8	↑0.3
4/20 03:10	97.9	↑0.1	満潮
4/20 03:20	97.8	↓-0.1
4/20 03:30	97.4	↓-0.4
4/20 03:40	96.9	↓-0.5
4/20 03:50	96.1	↓-0.8
4/20 04:00	95.0	↓-1.1
4/20 04:10	93.8	↓-1.2
4/20 04:20	92.3	↓-1.5
4/20 04:30	90.7	↓-1.6
4/20 04:40	88.8	↓-1.9
4/20 04:50	86.7	↓-2.1
4/20 05:00	84.5	↓-2.2
4/20 05:10	82.0	↓-2.5
4/20 05:20	79.5	↓-2.5
4/20 05:30	76.7	↓-2.8
4/20 05:40	73.9	↓-2.8
4/20 05:50	70.9	↓-3.0
4/20 06:00	67.8	↓-3.1
4/20 06:10	64.7	↓-3.1
4/20 06:20	61.5	↓-3.2
4/20 06:30	58.2	↓-3.3	最大潮位差
4/20 06:40	54.9	↓-3.3	最大潮位差
4/20 06:50	51.6	↓-3.3	最大潮位差
4/20 07:00	48.4	↓-3.2
4/20 07:10	45.1	↓-3.3	最大潮位差
4/20 07:20	41.9	↓-3.2
4/20 07:30	38.8	↓-3.1
4/20 07:40	35.7	↓-3.1
4/20 07:50	32.8	↓-2.9
4/20 08:00	30.0	↓-2.8
4/20 08:10	27.3	↓-2.7
4/20 08:20	24.8	↓-2.5
4/20 08:30	22.4	↓-2.4
4/20 08:40	20.2	↓-2.2
4/20 08:50	18.2	↓-2.0
4/20 09:00	16.4	↓-1.8
4/20 09:10	14.8	↓-1.6
4/20 09:20	13.4	↓-1.4
4/20 09:30	12.2	↓-1.2
4/20 09:40	11.3	↓-0.9
4/20 09:50	10.6	↓-0.7
4/20 10:00	10.1	↓-0.5
4/20 10:10	9.8	↓-0.3	干潮
4/20 10:20	9.8	0
4/20 10:30	10.0	↑0.2
4/20 10:40	10.4	↑0.4
4/20 10:50	11.1	↑0.7
4/20 11:00	11.9	↑0.8
4/20 11:10	13.0	↑1.1
4/20 11:20	14.2	↑1.2
4/20 11:30	15.6	↑1.4
4/20 11:40	17.2	↑1.6
4/20 11:50	18.9	↑1.7
4/20 12:00	20.8	↑1.9
4/20 12:10	22.8	↑2.0
4/20 12:20	24.9	↑2.1
4/20 12:30	27.1	↑2.2
4/20 12:40	29.4	↑2.3
4/20 12:50	31.8	↑2.4
4/20 13:00	34.2	↑2.4
4/20 13:10	36.6	↑2.4
4/20 13:20	39.0	↑2.4
4/20 13:30	41.4	↑2.4
4/20 13:40	43.8	↑2.4
4/20 13:50	46.2	↑2.4
4/20 14:00	48.5	↑2.3
4/20 14:10	50.7	↑2.2
4/20 14:20	52.9	↑2.2
4/20 14:30	54.9	↑2.0
4/20 14:40	56.9	↑2.0
4/20 14:50	58.7	↑1.8
4/20 15:00	60.4	↑1.7
4/20 15:10	61.9	↑1.5
4/20 15:20	63.3	↑1.4
4/20 15:30	64.6	↑1.3
4/20 15:40	65.6	↑1.0
4/20 15:50	66.6	↑1.0
4/20 16:00	67.3	↑0.7
4/20 16:10	67.9	↑0.6
4/20 16:20	68.3	↑0.4
4/20 16:30	68.5	↑0.2	満潮
4/20 16:40	68.6	↑0.1	満潮
4/20 16:50	68.5	↓-0.1
4/20 17:00	68.2	↓-0.3
4/20 17:10	67.8	↓-0.4
4/20 17:20	67.3	↓-0.5
4/20 17:30	66.6	↓-0.7
4/20 17:40	65.8	↓-0.8
4/20 17:50	64.9	↓-0.9
4/20 18:00	63.9	↓-1.0
4/20 18:10	62.8	↓-1.1
4/20 18:20	61.6	↓-1.2
4/20 18:30	60.4	↓-1.2
4/20 18:40	59.1	↓-1.3
4/20 18:50	57.8	↓-1.3
4/20 19:00	56.5	↓-1.3
4/20 19:10	55.2	↓-1.3
4/20 19:20	53.9	↓-1.3
4/20 19:30	52.6	↓-1.3
4/20 19:40	51.4	↓-1.2
4/20 19:50	50.2	↓-1.2
4/20 20:00	49.1	↓-1.1
4/20 20:10	48.1	↓-1.0
4/20 20:20	47.2	↓-0.9
4/20 20:30	46.4	↓-0.8
4/20 20:40	45.7	↓-0.7
4/20 20:50	45.2	↓-0.5
4/20 21:00	44.8	↓-0.4
4/20 21:10	44.6	↓-0.2
4/20 21:20	44.5	↓-0.1	干潮
4/20 21:30	44.6	↑0.1
4/20 21:40	44.8	↑0.2
4/20 21:50	45.2	↑0.4
4/20 22:00	45.8	↑0.6
4/20 22:10	46.5	↑0.7
4/20 22:20	47.5	↑1.0
4/20 22:30	48.5	↑1.0
4/20 22:40	49.8	↑1.3
4/20 22:50	51.2	↑1.4
4/20 23:00	52.7	↑1.5
4/20 23:10	54.4	↑1.7
4/20 23:20	56.2	↑1.8
4/20 23:30	58.2	↑2.0
4/20 23:40	60.2	↑2.0
4/20 23:50	62.3	↑2.1