20 (木)	03:01	10:05	16:28	21:13
	97cm	11cm	70cm	45cm
大潮 出 04:31 入 18:12 出 05:34 入 19:54 潮干狩り ◎ 08:11～12:03

コイセボイ（北海道）2034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	69.7	↑2.3
4/20 00:10	72.0	↑2.3
4/20 00:20	74.3	↑2.3
4/20 00:30	76.6	↑2.3
4/20 00:40	78.8	↑2.2
4/20 00:50	81.0	↑2.2
4/20 01:00	83.1	↑2.1
4/20 01:10	85.0	↑1.9
4/20 01:20	86.9	↑1.9
4/20 01:30	88.7	↑1.8
4/20 01:40	90.3	↑1.6
4/20 01:50	91.8	↑1.5
4/20 02:00	93.1	↑1.3
4/20 02:10	94.2	↑1.1
4/20 02:20	95.1	↑0.9
4/20 02:30	95.9	↑0.8
4/20 02:40	96.4	↑0.5
4/20 02:50	96.7	↑0.3
4/20 03:00	96.8	↑0.1	満潮
4/20 03:10	96.7	↓-0.1
4/20 03:20	96.4	↓-0.3
4/20 03:30	95.8	↓-0.6
4/20 03:40	95.0	↓-0.8
4/20 03:50	94.0	↓-1.0
4/20 04:00	92.7	↓-1.3
4/20 04:10	91.3	↓-1.4
4/20 04:20	89.6	↓-1.7
4/20 04:30	87.8	↓-1.8
4/20 04:40	85.7	↓-2.1
4/20 04:50	83.5	↓-2.2
4/20 05:00	81.1	↓-2.4
4/20 05:10	78.5	↓-2.6
4/20 05:20	75.8	↓-2.7
4/20 05:30	73.0	↓-2.8
4/20 05:40	70.0	↓-3.0
4/20 05:50	67.0	↓-3.0
4/20 06:00	63.9	↓-3.1
4/20 06:10	60.7	↓-3.2
4/20 06:20	57.5	↓-3.2
4/20 06:30	54.2	↓-3.3	最大潮位差
4/20 06:40	51.0	↓-3.2
4/20 06:50	47.7	↓-3.3	最大潮位差
4/20 07:00	44.6	↓-3.1
4/20 07:10	41.4	↓-3.2
4/20 07:20	38.3	↓-3.1
4/20 07:30	35.3	↓-3.0
4/20 07:40	32.5	↓-2.8
4/20 07:50	29.7	↓-2.8
4/20 08:00	27.1	↓-2.6
4/20 08:10	24.6	↓-2.5
4/20 08:20	22.3	↓-2.3
4/20 08:30	20.1	↓-2.2
4/20 08:40	18.2	↓-1.9
4/20 08:50	16.4	↓-1.8
4/20 09:00	14.9	↓-1.5
4/20 09:10	13.6	↓-1.3
4/20 09:20	12.4	↓-1.2
4/20 09:30	11.6	↓-0.8
4/20 09:40	10.9	↓-0.7
4/20 09:50	10.5	↓-0.4
4/20 10:00	10.3	↓-0.2	干潮
4/20 10:10	10.3	0
4/20 10:20	10.6	↑0.3
4/20 10:30	11.0	↑0.4
4/20 10:40	11.7	↑0.7
4/20 10:50	12.6	↑0.9
4/20 11:00	13.7	↑1.1
4/20 11:10	15.0	↑1.3
4/20 11:20	16.5	↑1.5
4/20 11:30	18.1	↑1.6
4/20 11:40	19.9	↑1.8
4/20 11:50	21.8	↑1.9
4/20 12:00	23.8	↑2.0
4/20 12:10	26.0	↑2.2
4/20 12:20	28.2	↑2.2
4/20 12:30	30.5	↑2.3
4/20 12:40	32.9	↑2.4
4/20 12:50	35.3	↑2.4
4/20 13:00	37.8	↑2.5
4/20 13:10	40.2	↑2.4
4/20 13:20	42.7	↑2.5
4/20 13:30	45.1	↑2.4
4/20 13:40	47.4	↑2.3
4/20 13:50	49.8	↑2.4
4/20 14:00	52.0	↑2.2
4/20 14:10	54.1	↑2.1
4/20 14:20	56.2	↑2.1
4/20 14:30	58.1	↑1.9
4/20 14:40	59.9	↑1.8
4/20 14:50	61.6	↑1.7
4/20 15:00	63.2	↑1.6
4/20 15:10	64.5	↑1.3
4/20 15:20	65.7	↑1.2
4/20 15:30	66.8	↑1.1
4/20 15:40	67.7	↑0.9
4/20 15:50	68.4	↑0.7
4/20 16:00	68.9	↑0.5
4/20 16:10	69.3	↑0.4
4/20 16:20	69.5	↑0.2	満潮
4/20 16:30	69.5	0
4/20 16:40	69.4	↓-0.1
4/20 16:50	69.1	↓-0.3
4/20 17:00	68.7	↓-0.4
4/20 17:10	68.1	↓-0.6
4/20 17:20	67.3	↓-0.8
4/20 17:30	66.5	↓-0.8
4/20 17:40	65.5	↓-1.0
4/20 17:50	64.5	↓-1.0
4/20 18:00	63.3	↓-1.2
4/20 18:10	62.1	↓-1.2
4/20 18:20	60.9	↓-1.2
4/20 18:30	59.5	↓-1.4
4/20 18:40	58.2	↓-1.3
4/20 18:50	56.8	↓-1.4
4/20 19:00	55.5	↓-1.3
4/20 19:10	54.1	↓-1.4
4/20 19:20	52.8	↓-1.3
4/20 19:30	51.5	↓-1.3
4/20 19:40	50.3	↓-1.2
4/20 19:50	49.2	↓-1.1
4/20 20:00	48.1	↓-1.1
4/20 20:10	47.2	↓-0.9
4/20 20:20	46.4	↓-0.8
4/20 20:30	45.7	↓-0.7
4/20 20:40	45.1	↓-0.6
4/20 20:50	44.7	↓-0.4
4/20 21:00	44.4	↓-0.3
4/20 21:10	44.3	↓-0.1	干潮
4/20 21:20	44.3	0
4/20 21:30	44.6	↑0.3
4/20 21:40	44.9	↑0.3
4/20 21:50	45.5	↑0.6
4/20 22:00	46.2	↑0.7
4/20 22:10	47.1	↑0.9
4/20 22:20	48.2	↑1.1
4/20 22:30	49.4	↑1.2
4/20 22:40	50.8	↑1.4
4/20 22:50	52.3	↑1.5
4/20 23:00	54.0	↑1.7
4/20 23:10	55.8	↑1.8
4/20 23:20	57.7	↑1.9
4/20 23:30	59.8	↑2.1
4/20 23:40	61.9	↑2.1
4/20 23:50	64.1	↑2.2