20 (木)	02:10	08:46	15:19	20:40
	82cm	18cm	80cm	45cm
大潮 出 04:31 入 18:11 出 04:32 入 18:18 潮干狩り ○ 07:21～10:11

コイセボイ（北海道）2023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	68.4	↑1.8
4/20 00:10	70.1	↑1.7
4/20 00:20	71.8	↑1.7
4/20 00:30	73.3	↑1.5
4/20 00:40	74.8	↑1.5
4/20 00:50	76.2	↑1.4
4/20 01:00	77.4	↑1.2
4/20 01:10	78.5	↑1.1
4/20 01:20	79.4	↑0.9
4/20 01:30	80.2	↑0.8
4/20 01:40	80.8	↑0.6
4/20 01:50	81.2	↑0.4
4/20 02:00	81.5	↑0.3	満潮
4/20 02:10	81.5	0	満潮
4/20 02:20	81.4	↓-0.1
4/20 02:30	81.1	↓-0.3
4/20 02:40	80.6	↓-0.5
4/20 02:50	80.0	↓-0.6
4/20 03:00	79.1	↓-0.9
4/20 03:10	78.1	↓-1.0
4/20 03:20	76.8	↓-1.3
4/20 03:30	75.5	↓-1.3
4/20 03:40	73.9	↓-1.6
4/20 03:50	72.2	↓-1.7
4/20 04:00	70.3	↓-1.9
4/20 04:10	68.3	↓-2.0
4/20 04:20	66.2	↓-2.1
4/20 04:30	64.0	↓-2.2
4/20 04:40	61.7	↓-2.3
4/20 04:50	59.3	↓-2.4
4/20 05:00	56.9	↓-2.4
4/20 05:10	54.3	↓-2.6	最大潮位差
4/20 05:20	51.8	↓-2.5
4/20 05:30	49.2	↓-2.6	最大潮位差
4/20 05:40	46.7	↓-2.5
4/20 05:50	44.1	↓-2.6	最大潮位差
4/20 06:00	41.6	↓-2.5
4/20 06:10	39.1	↓-2.5
4/20 06:20	36.7	↓-2.4
4/20 06:30	34.4	↓-2.3
4/20 06:40	32.2	↓-2.2
4/20 06:50	30.0	↓-2.2
4/20 07:00	28.0	↓-2.0
4/20 07:10	26.2	↓-1.8
4/20 07:20	24.5	↓-1.7
4/20 07:30	22.9	↓-1.6
4/20 07:40	21.5	↓-1.4
4/20 07:50	20.3	↓-1.2
4/20 08:00	19.3	↓-1.0
4/20 08:10	18.5	↓-0.8
4/20 08:20	17.9	↓-0.6
4/20 08:30	17.5	↓-0.4
4/20 08:40	17.3	↓-0.2	干潮
4/20 08:50	17.3	0
4/20 09:00	17.5	↑0.2
4/20 09:10	17.9	↑0.4
4/20 09:20	18.5	↑0.6
4/20 09:30	19.3	↑0.8
4/20 09:40	20.3	↑1.0
4/20 09:50	21.5	↑1.2
4/20 10:00	22.8	↑1.3
4/20 10:10	24.4	↑1.6
4/20 10:20	26.0	↑1.6
4/20 10:30	27.9	↑1.9
4/20 10:40	29.8	↑1.9
4/20 10:50	31.9	↑2.1
4/20 11:00	34.1	↑2.2
4/20 11:10	36.4	↑2.3
4/20 11:20	38.7	↑2.3
4/20 11:30	41.2	↑2.5
4/20 11:40	43.6	↑2.4
4/20 11:50	46.1	↑2.5
4/20 12:00	48.6	↑2.5
4/20 12:10	51.1	↑2.5
4/20 12:20	53.5	↑2.4
4/20 12:30	56.0	↑2.5
4/20 12:40	58.3	↑2.3
4/20 12:50	60.6	↑2.3
4/20 13:00	62.8	↑2.2
4/20 13:10	65.0	↑2.2
4/20 13:20	67.0	↑2.0
4/20 13:30	68.9	↑1.9
4/20 13:40	70.6	↑1.7
4/20 13:50	72.2	↑1.6
4/20 14:00	73.7	↑1.5
4/20 14:10	74.9	↑1.2
4/20 14:20	76.1	↑1.2
4/20 14:30	77.0	↑0.9
4/20 14:40	77.8	↑0.8
4/20 14:50	78.4	↑0.6
4/20 15:00	78.8	↑0.4
4/20 15:10	79.0	↑0.2	満潮
4/20 15:20	79.0	0
4/20 15:30	78.9	↓-0.1
4/20 15:40	78.6	↓-0.3
4/20 15:50	78.1	↓-0.5
4/20 16:00	77.5	↓-0.6
4/20 16:10	76.7	↓-0.8
4/20 16:20	75.8	↓-0.9
4/20 16:30	74.7	↓-1.1
4/20 16:40	73.5	↓-1.2
4/20 16:50	72.2	↓-1.3
4/20 17:00	70.8	↓-1.4
4/20 17:10	69.4	↓-1.4
4/20 17:20	67.8	↓-1.6
4/20 17:30	66.2	↓-1.6
4/20 17:40	64.6	↓-1.6
4/20 17:50	62.9	↓-1.7
4/20 18:00	61.2	↓-1.7
4/20 18:10	59.5	↓-1.7
4/20 18:20	57.9	↓-1.6
4/20 18:30	56.3	↓-1.6
4/20 18:40	54.7	↓-1.6
4/20 18:50	53.2	↓-1.5
4/20 19:00	51.8	↓-1.4
4/20 19:10	50.4	↓-1.4
4/20 19:20	49.2	↓-1.2
4/20 19:30	48.1	↓-1.1
4/20 19:40	47.1	↓-1.0
4/20 19:50	46.3	↓-0.8
4/20 20:00	45.5	↓-0.8
4/20 20:10	45.0	↓-0.5
4/20 20:20	44.6	↓-0.4
4/20 20:30	44.4	↓-0.2	干潮
4/20 20:40	44.3	↓-0.1	干潮
4/20 20:50	44.4	↑0.1
4/20 21:00	44.7	↑0.3
4/20 21:10	45.2	↑0.5
4/20 21:20	45.8	↑0.6
4/20 21:30	46.6	↑0.8
4/20 21:40	47.5	↑0.9
4/20 21:50	48.6	↑1.1
4/20 22:00	49.8	↑1.2
4/20 22:10	51.2	↑1.4
4/20 22:20	52.7	↑1.5
4/20 22:30	54.4	↑1.7
4/20 22:40	56.1	↑1.7
4/20 22:50	57.9	↑1.8
4/20 23:00	59.8	↑1.9
4/20 23:10	61.8	↑2.0
4/20 23:20	63.8	↑2.0
4/20 23:30	65.9	↑2.1
4/20 23:40	68.0	↑2.1
4/20 23:50	70.0	↑2.0