20 (月)	03:32	11:18	17:51	20:52
	112cm	4cm	54cm	48cm
中潮 出 04:31 入 18:12 出 05:40 入 22:08 潮干狩り ◎ 08:57～14:00

コイセボイ（北海道）2026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	74.9	↑2.3
4/20 00:10	77.4	↑2.5
4/20 00:20	79.8	↑2.4
4/20 00:30	82.3	↑2.5
4/20 00:40	84.8	↑2.5
4/20 00:50	87.2	↑2.4
4/20 01:00	89.6	↑2.4
4/20 01:10	92.0	↑2.4
4/20 01:20	94.3	↑2.3
4/20 01:30	96.5	↑2.2
4/20 01:40	98.6	↑2.1
4/20 01:50	100.6	↑2.0
4/20 02:00	102.5	↑1.9
4/20 02:10	104.2	↑1.7
4/20 02:20	105.8	↑1.6
4/20 02:30	107.2	↑1.4
4/20 02:40	108.4	↑1.2
4/20 02:50	109.4	↑1.0
4/20 03:00	110.3	↑0.9
4/20 03:10	110.9	↑0.6
4/20 03:20	111.2	↑0.3
4/20 03:30	111.4	↑0.2	満潮
4/20 03:40	111.3	↓-0.1
4/20 03:50	111.0	↓-0.3
4/20 04:00	110.4	↓-0.6
4/20 04:10	109.6	↓-0.8
4/20 04:20	108.6	↓-1.0
4/20 04:30	107.3	↓-1.3
4/20 04:40	105.8	↓-1.5
4/20 04:50	104.0	↓-1.8
4/20 05:00	102.1	↓-1.9
4/20 05:10	99.9	↓-2.2
4/20 05:20	97.5	↓-2.4
4/20 05:30	95.0	↓-2.5
4/20 05:40	92.2	↓-2.8
4/20 05:50	89.3	↓-2.9
4/20 06:00	86.2	↓-3.1
4/20 06:10	83.0	↓-3.2
4/20 06:20	79.7	↓-3.3
4/20 06:30	76.2	↓-3.5
4/20 06:40	72.7	↓-3.5
4/20 06:50	69.0	↓-3.7
4/20 07:00	65.4	↓-3.6
4/20 07:10	61.7	↓-3.7
4/20 07:20	57.9	↓-3.8	最大潮位差
4/20 07:30	54.2	↓-3.7
4/20 07:40	50.5	↓-3.7
4/20 07:50	46.8	↓-3.7
4/20 08:00	43.2	↓-3.6
4/20 08:10	39.6	↓-3.6
4/20 08:20	36.2	↓-3.4
4/20 08:30	32.8	↓-3.4
4/20 08:40	29.6	↓-3.2
4/20 08:50	26.5	↓-3.1
4/20 09:00	23.5	↓-3.0
4/20 09:10	20.8	↓-2.7
4/20 09:20	18.2	↓-2.6
4/20 09:30	15.7	↓-2.5
4/20 09:40	13.5	↓-2.2
4/20 09:50	11.5	↓-2.0
4/20 10:00	9.7	↓-1.8
4/20 10:10	8.1	↓-1.6
4/20 10:20	6.7	↓-1.4
4/20 10:30	5.6	↓-1.1
4/20 10:40	4.7	↓-0.9
4/20 10:50	4.0	↓-0.7
4/20 11:00	3.5	↓-0.5
4/20 11:10	3.2	↓-0.3	干潮
4/20 11:20	3.2	0
4/20 11:30	3.4	↑0.2
4/20 11:40	3.8	↑0.4
4/20 11:50	4.3	↑0.5
4/20 12:00	5.1	↑0.8
4/20 12:10	6.0	↑0.9
4/20 12:20	7.2	↑1.2
4/20 12:30	8.4	↑1.2
4/20 12:40	9.8	↑1.4
4/20 12:50	11.4	↑1.6
4/20 13:00	13.0	↑1.6
4/20 13:10	14.8	↑1.8
4/20 13:20	16.6	↑1.8
4/20 13:30	18.5	↑1.9
4/20 13:40	20.5	↑2.0
4/20 13:50	22.5	↑2.0
4/20 14:00	24.6	↑2.1
4/20 14:10	26.6	↑2.0
4/20 14:20	28.7	↑2.1
4/20 14:30	30.7	↑2.0
4/20 14:40	32.7	↑2.0
4/20 14:50	34.7	↑2.0
4/20 15:00	36.6	↑1.9
4/20 15:10	38.4	↑1.8
4/20 15:20	40.1	↑1.7
4/20 15:30	41.8	↑1.7
4/20 15:40	43.4	↑1.6
4/20 15:50	44.9	↑1.5
4/20 16:00	46.2	↑1.3
4/20 16:10	47.5	↑1.3
4/20 16:20	48.6	↑1.1
4/20 16:30	49.6	↑1.0
4/20 16:40	50.5	↑0.9
4/20 16:50	51.2	↑0.7
4/20 17:00	51.8	↑0.6
4/20 17:10	52.3	↑0.5
4/20 17:20	52.7	↑0.4
4/20 17:30	53.0	↑0.3
4/20 17:40	53.2	↑0.2
4/20 17:50	53.2	0	満潮
4/20 18:00	53.2	0
4/20 18:10	53.0	↓-0.2
4/20 18:20	52.8	↓-0.2
4/20 18:30	52.5	↓-0.3
4/20 18:40	52.2	↓-0.3
4/20 18:50	51.8	↓-0.4
4/20 19:00	51.3	↓-0.5
4/20 19:10	50.9	↓-0.4
4/20 19:20	50.4	↓-0.5
4/20 19:30	49.9	↓-0.5
4/20 19:40	49.5	↓-0.4
4/20 19:50	49.0	↓-0.5
4/20 20:00	48.6	↓-0.4
4/20 20:10	48.3	↓-0.3
4/20 20:20	48.0	↓-0.3
4/20 20:30	47.7	↓-0.3
4/20 20:40	47.6	↓-0.1
4/20 20:50	47.5	↓-0.1	干潮
4/20 21:00	47.5	0
4/20 21:10	47.7	↑0.2
4/20 21:20	47.9	↑0.2
4/20 21:30	48.3	↑0.4
4/20 21:40	48.8	↑0.5
4/20 21:50	49.5	↑0.7
4/20 22:00	50.3	↑0.8
4/20 22:10	51.2	↑0.9
4/20 22:20	52.2	↑1.0
4/20 22:30	53.4	↑1.2
4/20 22:40	54.8	↑1.4
4/20 22:50	56.2	↑1.4
4/20 23:00	57.8	↑1.6
4/20 23:10	59.6	↑1.8
4/20 23:20	61.4	↑1.8
4/20 23:30	63.4	↑2.0
4/20 23:40	65.5	↑2.1
4/20 23:50	67.6	↑2.1