20 (金)	01:39	08:31	15:05	20:04
	85cm	16cm	74cm	48cm
大潮 出 04:30 入 18:12 出 17:51 入 03:38 潮干狩り ○ 06:57～10:06

コイセボイ（北海道）2046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	76.7	↑1.5
4/20 00:10	78.1	↑1.4
4/20 00:20	79.4	↑1.3
4/20 00:30	80.5	↑1.1
4/20 00:40	81.5	↑1.0
4/20 00:50	82.4	↑0.9
4/20 01:00	83.1	↑0.7
4/20 01:10	83.7	↑0.6
4/20 01:20	84.1	↑0.4
4/20 01:30	84.3	↑0.2	満潮
4/20 01:40	84.4	↑0.1
4/20 01:50	84.2	↓-0.2
4/20 02:00	83.9	↓-0.3
4/20 02:10	83.4	↓-0.5
4/20 02:20	82.7	↓-0.7
4/20 02:30	81.9	↓-0.8
4/20 02:40	80.8	↓-1.1
4/20 02:50	79.6	↓-1.2
4/20 03:00	78.2	↓-1.4
4/20 03:10	76.7	↓-1.5
4/20 03:20	75.0	↓-1.7
4/20 03:30	73.1	↓-1.9
4/20 03:40	71.1	↓-2.0
4/20 03:50	69.0	↓-2.1
4/20 04:00	66.8	↓-2.2
4/20 04:10	64.4	↓-2.4
4/20 04:20	62.0	↓-2.4
4/20 04:30	59.5	↓-2.5
4/20 04:40	57.0	↓-2.5
4/20 04:50	54.4	↓-2.6
4/20 05:00	51.8	↓-2.6
4/20 05:10	49.1	↓-2.7	最大潮位差
4/20 05:20	46.5	↓-2.6
4/20 05:30	43.9	↓-2.6
4/20 05:40	41.3	↓-2.6
4/20 05:50	38.8	↓-2.5
4/20 06:00	36.4	↓-2.4
4/20 06:10	34.0	↓-2.4
4/20 06:20	31.7	↓-2.3
4/20 06:30	29.5	↓-2.2
4/20 06:40	27.5	↓-2.0
4/20 06:50	25.6	↓-1.9
4/20 07:00	23.8	↓-1.8
4/20 07:10	22.2	↓-1.6
4/20 07:20	20.8	↓-1.4
4/20 07:30	19.5	↓-1.3
4/20 07:40	18.4	↓-1.1
4/20 07:50	17.5	↓-0.9
4/20 08:00	16.8	↓-0.7
4/20 08:10	16.3	↓-0.5
4/20 08:20	16.0	↓-0.3
4/20 08:30	15.9	↓-0.1	干潮
4/20 08:40	16.0	↑0.1
4/20 08:50	16.3	↑0.3
4/20 09:00	16.8	↑0.5
4/20 09:10	17.5	↑0.7
4/20 09:20	18.4	↑0.9
4/20 09:30	19.4	↑1.0
4/20 09:40	20.6	↑1.2
4/20 09:50	22.0	↑1.4
4/20 10:00	23.6	↑1.6
4/20 10:10	25.2	↑1.6
4/20 10:20	27.0	↑1.8
4/20 10:30	29.0	↑2.0
4/20 10:40	31.0	↑2.0
4/20 10:50	33.1	↑2.1
4/20 11:00	35.3	↑2.2
4/20 11:10	37.5	↑2.2
4/20 11:20	39.8	↑2.3
4/20 11:30	42.1	↑2.3
4/20 11:40	44.5	↑2.4
4/20 11:50	46.8	↑2.3
4/20 12:00	49.1	↑2.3
4/20 12:10	51.4	↑2.3
4/20 12:20	53.6	↑2.2
4/20 12:30	55.8	↑2.2
4/20 12:40	57.9	↑2.1
4/20 12:50	59.9	↑2.0
4/20 13:00	61.8	↑1.9
4/20 13:10	63.6	↑1.8
4/20 13:20	65.3	↑1.7
4/20 13:30	66.9	↑1.6
4/20 13:40	68.3	↑1.4
4/20 13:50	69.5	↑1.2
4/20 14:00	70.7	↑1.2
4/20 14:10	71.6	↑0.9
4/20 14:20	72.4	↑0.8
4/20 14:30	73.0	↑0.6
4/20 14:40	73.5	↑0.5
4/20 14:50	73.8	↑0.3
4/20 15:00	74.0	↑0.2	満潮
4/20 15:10	73.9	↓-0.1
4/20 15:20	73.8	↓-0.1
4/20 15:30	73.5	↓-0.3
4/20 15:40	73.0	↓-0.5
4/20 15:50	72.4	↓-0.6
4/20 16:00	71.7	↓-0.7
4/20 16:10	70.8	↓-0.9
4/20 16:20	69.9	↓-0.9
4/20 16:30	68.8	↓-1.1
4/20 16:40	67.7	↓-1.1
4/20 16:50	66.5	↓-1.2
4/20 17:00	65.2	↓-1.3
4/20 17:10	63.9	↓-1.3
4/20 17:20	62.5	↓-1.4
4/20 17:30	61.2	↓-1.3
4/20 17:40	59.8	↓-1.4
4/20 17:50	58.4	↓-1.4
4/20 18:00	57.1	↓-1.3
4/20 18:10	55.8	↓-1.3
4/20 18:20	54.6	↓-1.2
4/20 18:30	53.4	↓-1.2
4/20 18:40	52.3	↓-1.1
4/20 18:50	51.3	↓-1.0
4/20 19:00	50.4	↓-0.9
4/20 19:10	49.6	↓-0.8
4/20 19:20	48.9	↓-0.7
4/20 19:30	48.3	↓-0.6
4/20 19:40	47.9	↓-0.4
4/20 19:50	47.6	↓-0.3
4/20 20:00	47.5	↓-0.1	干潮
4/20 20:10	47.6	↑0.1
4/20 20:20	47.7	↑0.1
4/20 20:30	48.1	↑0.4
4/20 20:40	48.6	↑0.5
4/20 20:50	49.2	↑0.6
4/20 21:00	50.0	↑0.8
4/20 21:10	51.0	↑1.0
4/20 21:20	52.1	↑1.1
4/20 21:30	53.3	↑1.2
4/20 21:40	54.7	↑1.4
4/20 21:50	56.1	↑1.4
4/20 22:00	57.7	↑1.6
4/20 22:10	59.4	↑1.7
4/20 22:20	61.2	↑1.8
4/20 22:30	63.1	↑1.9
4/20 22:40	65.0	↑1.9
4/20 22:50	67.0	↑2.0
4/20 23:00	69.0	↑2.0
4/20 23:10	71.0	↑2.0
4/20 23:20	73.1	↑2.1
4/20 23:30	75.1	↑2.0
4/20 23:40	77.1	↑2.0
4/20 23:50	79.0	↑1.9