20 (金)	02:52	09:44	16:12	21:13
	91cm	12cm	75cm	45cm
大潮 出 04:30 入 18:12 出 19:09 入 05:09 潮干狩り ◎ 07:55～11:35

コイセボイ（北海道）2057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	66.6	↑2.1
4/20 00:10	68.8	↑2.2
4/20 00:20	70.9	↑2.1
4/20 00:30	73.1	↑2.2
4/20 00:40	75.1	↑2.0
4/20 00:50	77.1	↑2.0
4/20 01:00	79.0	↑1.9
4/20 01:10	80.8	↑1.8
4/20 01:20	82.5	↑1.7
4/20 01:30	84.1	↑1.6
4/20 01:40	85.5	↑1.4
4/20 01:50	86.7	↑1.2
4/20 02:00	87.8	↑1.1
4/20 02:10	88.8	↑1.0
4/20 02:20	89.5	↑0.7
4/20 02:30	90.0	↑0.5
4/20 02:40	90.4	↑0.4
4/20 02:50	90.5	↑0.1	満潮
4/20 03:00	90.4	↓-0.1
4/20 03:10	90.1	↓-0.3
4/20 03:20	89.6	↓-0.5
4/20 03:30	88.8	↓-0.8
4/20 03:40	87.9	↓-0.9
4/20 03:50	86.7	↓-1.2
4/20 04:00	85.4	↓-1.3
4/20 04:10	83.8	↓-1.6
4/20 04:20	82.1	↓-1.7
4/20 04:30	80.1	↓-2.0
4/20 04:40	78.0	↓-2.1
4/20 04:50	75.8	↓-2.2
4/20 05:00	73.4	↓-2.4
4/20 05:10	70.8	↓-2.6
4/20 05:20	68.1	↓-2.7
4/20 05:30	65.4	↓-2.7
4/20 05:40	62.5	↓-2.9
4/20 05:50	59.6	↓-2.9
4/20 06:00	56.6	↓-3.0
4/20 06:10	53.6	↓-3.0
4/20 06:20	50.5	↓-3.1	最大潮位差
4/20 06:30	47.5	↓-3.0
4/20 06:40	44.5	↓-3.0
4/20 06:50	41.5	↓-3.0
4/20 07:00	38.6	↓-2.9
4/20 07:10	35.8	↓-2.8
4/20 07:20	33.0	↓-2.8
4/20 07:30	30.4	↓-2.6
4/20 07:40	27.8	↓-2.6
4/20 07:50	25.4	↓-2.4
4/20 08:00	23.2	↓-2.2
4/20 08:10	21.2	↓-2.0
4/20 08:20	19.3	↓-1.9
4/20 08:30	17.6	↓-1.7
4/20 08:40	16.1	↓-1.5
4/20 08:50	14.8	↓-1.3
4/20 09:00	13.7	↓-1.1
4/20 09:10	12.9	↓-0.8
4/20 09:20	12.2	↓-0.7
4/20 09:30	11.8	↓-0.4
4/20 09:40	11.7	↓-0.1	干潮
4/20 09:50	11.7	0
4/20 10:00	12.0	↑0.3
4/20 10:10	12.5	↑0.5
4/20 10:20	13.2	↑0.7
4/20 10:30	14.1	↑0.9
4/20 10:40	15.2	↑1.1
4/20 10:50	16.6	↑1.4
4/20 11:00	18.1	↑1.5
4/20 11:10	19.7	↑1.6
4/20 11:20	21.6	↑1.9
4/20 11:30	23.5	↑1.9
4/20 11:40	25.7	↑2.2
4/20 11:50	27.9	↑2.2
4/20 12:00	30.2	↑2.3
4/20 12:10	32.6	↑2.4
4/20 12:20	35.1	↑2.5
4/20 12:30	37.6	↑2.5
4/20 12:40	40.2	↑2.6
4/20 12:50	42.7	↑2.5
4/20 13:00	45.3	↑2.6
4/20 13:10	47.8	↑2.5
4/20 13:20	50.4	↑2.6
4/20 13:30	52.8	↑2.4
4/20 13:40	55.2	↑2.4
4/20 13:50	57.5	↑2.3
4/20 14:00	59.7	↑2.2
4/20 14:10	61.8	↑2.1
4/20 14:20	63.8	↑2.0
4/20 14:30	65.6	↑1.8
4/20 14:40	67.3	↑1.7
4/20 14:50	68.8	↑1.5
4/20 15:00	70.2	↑1.4
4/20 15:10	71.4	↑1.2
4/20 15:20	72.4	↑1.0
4/20 15:30	73.2	↑0.8
4/20 15:40	73.9	↑0.7
4/20 15:50	74.4	↑0.5
4/20 16:00	74.6	↑0.2
4/20 16:10	74.8	↑0.2	満潮
4/20 16:20	74.7	↓-0.1
4/20 16:30	74.5	↓-0.2
4/20 16:40	74.0	↓-0.5
4/20 16:50	73.5	↓-0.5
4/20 17:00	72.8	↓-0.7
4/20 17:10	71.9	↓-0.9
4/20 17:20	70.9	↓-1.0
4/20 17:30	69.8	↓-1.1
4/20 17:40	68.6	↓-1.2
4/20 17:50	67.3	↓-1.3
4/20 18:00	65.9	↓-1.4
4/20 18:10	64.5	↓-1.4
4/20 18:20	63.0	↓-1.5
4/20 18:30	61.5	↓-1.5
4/20 18:40	59.9	↓-1.6
4/20 18:50	58.4	↓-1.5
4/20 19:00	56.8	↓-1.6
4/20 19:10	55.3	↓-1.5
4/20 19:20	53.9	↓-1.4
4/20 19:30	52.5	↓-1.4
4/20 19:40	51.2	↓-1.3
4/20 19:50	50.0	↓-1.2
4/20 20:00	48.8	↓-1.2
4/20 20:10	47.8	↓-1.0
4/20 20:20	46.9	↓-0.9
4/20 20:30	46.2	↓-0.7
4/20 20:40	45.6	↓-0.6
4/20 20:50	45.1	↓-0.5
4/20 21:00	44.8	↓-0.3
4/20 21:10	44.7	↓-0.1	干潮
4/20 21:20	44.8	↑0.1
4/20 21:30	45.0	↑0.2
4/20 21:40	45.4	↑0.4
4/20 21:50	45.9	↑0.5
4/20 22:00	46.7	↑0.8
4/20 22:10	47.6	↑0.9
4/20 22:20	48.7	↑1.1
4/20 22:30	49.9	↑1.2
4/20 22:40	51.3	↑1.4
4/20 22:50	52.8	↑1.5
4/20 23:00	54.5	↑1.7
4/20 23:10	56.3	↑1.8
4/20 23:20	58.2	↑1.9
4/20 23:30	60.2	↑2.0
4/20 23:40	62.3	↑2.1
4/20 23:50	64.4	↑2.1