20 (日)	02:14	09:00	15:34	20:41
	86cm	14cm	77cm	46cm
大潮 出 04:30 入 18:12 出 04:29 入 18:28 潮干狩り ○ 07:19～10:42

コイセボイ（北海道）2042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	70.7	↑1.9
4/20 00:10	72.5	↑1.8
4/20 00:20	74.3	↑1.8
4/20 00:30	76.0	↑1.7
4/20 00:40	77.5	↑1.5
4/20 00:50	79.0	↑1.5
4/20 01:00	80.3	↑1.3
4/20 01:10	81.5	↑1.2
4/20 01:20	82.5	↑1.0
4/20 01:30	83.4	↑0.9
4/20 01:40	84.1	↑0.7
4/20 01:50	84.7	↑0.6
4/20 02:00	85.0	↑0.3
4/20 02:10	85.2	↑0.2	満潮
4/20 02:20	85.1	↓-0.1
4/20 02:30	84.9	↓-0.2
4/20 02:40	84.5	↓-0.4
4/20 02:50	83.9	↓-0.6
4/20 03:00	83.0	↓-0.9
4/20 03:10	82.0	↓-1.0
4/20 03:20	80.8	↓-1.2
4/20 03:30	79.4	↓-1.4
4/20 03:40	77.9	↓-1.5
4/20 03:50	76.1	↓-1.8
4/20 04:00	74.2	↓-1.9
4/20 04:10	72.2	↓-2.0
4/20 04:20	70.0	↓-2.2
4/20 04:30	67.7	↓-2.3
4/20 04:40	65.3	↓-2.4
4/20 04:50	62.7	↓-2.6
4/20 05:00	60.1	↓-2.6
4/20 05:10	57.5	↓-2.6
4/20 05:20	54.7	↓-2.8	最大潮位差
4/20 05:30	52.0	↓-2.7
4/20 05:40	49.2	↓-2.8	最大潮位差
4/20 05:50	46.4	↓-2.8	最大潮位差
4/20 06:00	43.7	↓-2.7
4/20 06:10	40.9	↓-2.8	最大潮位差
4/20 06:20	38.3	↓-2.6
4/20 06:30	35.7	↓-2.6
4/20 06:40	33.1	↓-2.6
4/20 06:50	30.7	↓-2.4
4/20 07:00	28.4	↓-2.3
4/20 07:10	26.2	↓-2.2
4/20 07:20	24.2	↓-2.0
4/20 07:30	22.3	↓-1.9
4/20 07:40	20.6	↓-1.7
4/20 07:50	19.1	↓-1.5
4/20 08:00	17.8	↓-1.3
4/20 08:10	16.6	↓-1.2
4/20 08:20	15.7	↓-0.9
4/20 08:30	14.9	↓-0.8
4/20 08:40	14.4	↓-0.5
4/20 08:50	14.1	↓-0.3	干潮
4/20 09:00	14.0	↓-0.1	干潮
4/20 09:10	14.1	↑0.1
4/20 09:20	14.4	↑0.3
4/20 09:30	15.0	↑0.6
4/20 09:40	15.7	↑0.7
4/20 09:50	16.7	↑1.0
4/20 10:00	17.8	↑1.1
4/20 10:10	19.1	↑1.3
4/20 10:20	20.6	↑1.5
4/20 10:30	22.3	↑1.7
4/20 10:40	24.1	↑1.8
4/20 10:50	26.1	↑2.0
4/20 11:00	28.2	↑2.1
4/20 11:10	30.4	↑2.2
4/20 11:20	32.6	↑2.2
4/20 11:30	35.0	↑2.4
4/20 11:40	37.5	↑2.5
4/20 11:50	39.9	↑2.4
4/20 12:00	42.5	↑2.6
4/20 12:10	45.0	↑2.5
4/20 12:20	47.5	↑2.5
4/20 12:30	50.0	↑2.5
4/20 12:40	52.5	↑2.5
4/20 12:50	54.9	↑2.4
4/20 13:00	57.3	↑2.4
4/20 13:10	59.5	↑2.2
4/20 13:20	61.7	↑2.2
4/20 13:30	63.8	↑2.1
4/20 13:40	65.7	↑1.9
4/20 13:50	67.6	↑1.9
4/20 14:00	69.2	↑1.6
4/20 14:10	70.8	↑1.6
4/20 14:20	72.1	↑1.3
4/20 14:30	73.3	↑1.2
4/20 14:40	74.3	↑1.0
4/20 14:50	75.2	↑0.9
4/20 15:00	75.9	↑0.7
4/20 15:10	76.4	↑0.5
4/20 15:20	76.7	↑0.3
4/20 15:30	76.8	↑0.1	満潮
4/20 15:40	76.8	0
4/20 15:50	76.6	↓-0.2
4/20 16:00	76.2	↓-0.4
4/20 16:10	75.6	↓-0.6
4/20 16:20	74.9	↓-0.7
4/20 16:30	74.1	↓-0.8
4/20 16:40	73.2	↓-0.9
4/20 16:50	72.1	↓-1.1
4/20 17:00	70.9	↓-1.2
4/20 17:10	69.6	↓-1.3
4/20 17:20	68.2	↓-1.4
4/20 17:30	66.8	↓-1.4
4/20 17:40	65.3	↓-1.5
4/20 17:50	63.8	↓-1.5
4/20 18:00	62.2	↓-1.6
4/20 18:10	60.7	↓-1.5
4/20 18:20	59.1	↓-1.6
4/20 18:30	57.6	↓-1.5
4/20 18:40	56.1	↓-1.5
4/20 18:50	54.7	↓-1.4
4/20 19:00	53.3	↓-1.4
4/20 19:10	52.0	↓-1.3
4/20 19:20	50.8	↓-1.2
4/20 19:30	49.8	↓-1.0
4/20 19:40	48.8	↓-1.0
4/20 19:50	47.9	↓-0.9
4/20 20:00	47.2	↓-0.7
4/20 20:10	46.7	↓-0.5
4/20 20:20	46.3	↓-0.4
4/20 20:30	46.0	↓-0.3
4/20 20:40	46.0	0	干潮
4/20 20:50	46.1	↑0.1
4/20 21:00	46.3	↑0.2
4/20 21:10	46.7	↑0.4
4/20 21:20	47.3	↑0.6
4/20 21:30	48.1	↑0.8
4/20 21:40	49.0	↑0.9
4/20 21:50	50.1	↑1.1
4/20 22:00	51.3	↑1.2
4/20 22:10	52.7	↑1.4
4/20 22:20	54.2	↑1.5
4/20 22:30	55.8	↑1.6
4/20 22:40	57.6	↑1.8
4/20 22:50	59.4	↑1.8
4/20 23:00	61.3	↑1.9
4/20 23:10	63.3	↑2.0
4/20 23:20	65.4	↑2.1
4/20 23:30	67.5	↑2.1
4/20 23:40	69.6	↑2.1
4/20 23:50	71.8	↑2.2