20 (水)	05:21	13:14	19:37	22:31
	103cm	19cm	51cm	47cm
中潮 出 04:30 入 18:12 出 23:12 入 08:07 潮干狩り ○ 11:46～14:52

コイセボイ（北海道）2033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	52.5	↑1.2
4/20 00:10	53.9	↑1.4
4/20 00:20	55.3	↑1.4
4/20 00:30	56.9	↑1.6
4/20 00:40	58.5	↑1.6
4/20 00:50	60.3	↑1.8
4/20 01:00	62.1	↑1.8
4/20 01:10	64.0	↑1.9
4/20 01:20	66.0	↑2.0
4/20 01:30	68.0	↑2.0
4/20 01:40	70.0	↑2.0
4/20 01:50	72.1	↑2.1
4/20 02:00	74.3	↑2.2
4/20 02:10	76.4	↑2.1
4/20 02:20	78.5	↑2.1
4/20 02:30	80.6	↑2.1
4/20 02:40	82.7	↑2.1
4/20 02:50	84.8	↑2.1
4/20 03:00	86.7	↑1.9
4/20 03:10	88.7	↑2.0
4/20 03:20	90.5	↑1.8
4/20 03:30	92.2	↑1.7
4/20 03:40	93.9	↑1.7
4/20 03:50	95.4	↑1.5
4/20 04:00	96.8	↑1.4
4/20 04:10	98.1	↑1.3
4/20 04:20	99.2	↑1.1
4/20 04:30	100.1	↑0.9
4/20 04:40	100.9	↑0.8
4/20 04:50	101.6	↑0.7
4/20 05:00	102.0	↑0.4
4/20 05:10	102.3	↑0.3
4/20 05:20	102.4	↑0.1	満潮
4/20 05:30	102.3	↓-0.1
4/20 05:40	102.0	↓-0.3
4/20 05:50	101.5	↓-0.5
4/20 06:00	100.9	↓-0.6
4/20 06:10	100.0	↓-0.9
4/20 06:20	99.0	↓-1.0
4/20 06:30	97.8	↓-1.2
4/20 06:40	96.4	↓-1.4
4/20 06:50	94.9	↓-1.5
4/20 07:00	93.1	↓-1.8
4/20 07:10	91.3	↓-1.8
4/20 07:20	89.3	↓-2.0
4/20 07:30	87.1	↓-2.2
4/20 07:40	84.8	↓-2.3
4/20 07:50	82.4	↓-2.4
4/20 08:00	80.0	↓-2.4
4/20 08:10	77.4	↓-2.6
4/20 08:20	74.7	↓-2.7
4/20 08:30	72.0	↓-2.7
4/20 08:40	69.2	↓-2.8
4/20 08:50	66.4	↓-2.8
4/20 09:00	63.5	↓-2.9	最大潮位差
4/20 09:10	60.7	↓-2.8
4/20 09:20	57.8	↓-2.9	最大潮位差
4/20 09:30	55.0	↓-2.8
4/20 09:40	52.2	↓-2.8
4/20 09:50	49.4	↓-2.8
4/20 10:00	46.7	↓-2.7
4/20 10:10	44.1	↓-2.6
4/20 10:20	41.6	↓-2.5
4/20 10:30	39.1	↓-2.5
4/20 10:40	36.7	↓-2.4
4/20 10:50	34.5	↓-2.2
4/20 11:00	32.4	↓-2.1
4/20 11:10	30.4	↓-2.0
4/20 11:20	28.5	↓-1.9
4/20 11:30	26.8	↓-1.7
4/20 11:40	25.3	↓-1.5
4/20 11:50	23.9	↓-1.4
4/20 12:00	22.6	↓-1.3
4/20 12:10	21.5	↓-1.1
4/20 12:20	20.6	↓-0.9
4/20 12:30	19.9	↓-0.7
4/20 12:40	19.3	↓-0.6
4/20 12:50	18.8	↓-0.5
4/20 13:00	18.5	↓-0.3
4/20 13:10	18.4	↓-0.1	干潮
4/20 13:20	18.4	0
4/20 13:30	18.6	↑0.2
4/20 13:40	18.9	↑0.3
4/20 13:50	19.4	↑0.5
4/20 14:00	19.9	↑0.5
4/20 14:10	20.6	↑0.7
4/20 14:20	21.4	↑0.8
4/20 14:30	22.3	↑0.9
4/20 14:40	23.3	↑1.0
4/20 14:50	24.3	↑1.0
4/20 15:00	25.5	↑1.2
4/20 15:10	26.7	↑1.2
4/20 15:20	27.9	↑1.2
4/20 15:30	29.2	↑1.3
4/20 15:40	30.5	↑1.3
4/20 15:50	31.8	↑1.3
4/20 16:00	33.2	↑1.4
4/20 16:10	34.5	↑1.3
4/20 16:20	35.8	↑1.3
4/20 16:30	37.1	↑1.3
4/20 16:40	38.4	↑1.3
4/20 16:50	39.6	↑1.2
4/20 17:00	40.8	↑1.2
4/20 17:10	41.9	↑1.1
4/20 17:20	43.0	↑1.1
4/20 17:30	44.0	↑1.0
4/20 17:40	44.9	↑0.9
4/20 17:50	45.8	↑0.9
4/20 18:00	46.6	↑0.8
4/20 18:10	47.3	↑0.7
4/20 18:20	47.9	↑0.6
4/20 18:30	48.5	↑0.6
4/20 18:40	48.9	↑0.4
4/20 18:50	49.3	↑0.4
4/20 19:00	49.6	↑0.3
4/20 19:10	49.8	↑0.2
4/20 19:20	50.0	↑0.2
4/20 19:30	50.0	0	満潮
4/20 19:40	50.0	0
4/20 19:50	50.0	0
4/20 20:00	49.9	↓-0.1
4/20 20:10	49.7	↓-0.2
4/20 20:20	49.5	↓-0.2
4/20 20:30	49.3	↓-0.2
4/20 20:40	49.0	↓-0.3
4/20 20:50	48.7	↓-0.3
4/20 21:00	48.4	↓-0.3
4/20 21:10	48.1	↓-0.3
4/20 21:20	47.8	↓-0.3
4/20 21:30	47.6	↓-0.2
4/20 21:40	47.3	↓-0.3
4/20 21:50	47.1	↓-0.2
4/20 22:00	46.9	↓-0.2
4/20 22:10	46.8	↓-0.1
4/20 22:20	46.7	↓-0.1
4/20 22:30	46.6	↓-0.1	干潮
4/20 22:40	46.7	↑0.1
4/20 22:50	46.8	↑0.1
4/20 23:00	47.0	↑0.2
4/20 23:10	47.2	↑0.2
4/20 23:20	47.6	↑0.4
4/20 23:30	48.0	↑0.4
4/20 23:40	48.6	↑0.6
4/20 23:50	49.2	↑0.6