20 (日)	06:15	15:42	-	-
	104cm	21cm	-	-
小潮 出 04:30 入 18:12 出 00:33 入 08:46 潮干狩り ○ 14:08～17:34

コイセボイ（北海道）2025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	51.8	↑1.1
4/20 00:10	53.1	↑1.3
4/20 00:20	54.4	↑1.3
4/20 00:30	55.8	↑1.4
4/20 00:40	57.2	↑1.4
4/20 00:50	58.7	↑1.5
4/20 01:00	60.3	↑1.6
4/20 01:10	61.9	↑1.6
4/20 01:20	63.6	↑1.7
4/20 01:30	65.3	↑1.7
4/20 01:40	67.1	↑1.8
4/20 01:50	68.9	↑1.8
4/20 02:00	70.7	↑1.8
4/20 02:10	72.6	↑1.9
4/20 02:20	74.5	↑1.9
4/20 02:30	76.3	↑1.8
4/20 02:40	78.2	↑1.9
4/20 02:50	80.1	↑1.9
4/20 03:00	81.9	↑1.8
4/20 03:10	83.8	↑1.9
4/20 03:20	85.6	↑1.8
4/20 03:30	87.3	↑1.7
4/20 03:40	89.1	↑1.8
4/20 03:50	90.7	↑1.6
4/20 04:00	92.3	↑1.6
4/20 04:10	93.8	↑1.5
4/20 04:20	95.2	↑1.4
4/20 04:30	96.6	↑1.4
4/20 04:40	97.8	↑1.2
4/20 04:50	99.0	↑1.2
4/20 05:00	100.0	↑1.0
4/20 05:10	100.9	↑0.9
4/20 05:20	101.7	↑0.8
4/20 05:30	102.4	↑0.7
4/20 05:40	103.0	↑0.6
4/20 05:50	103.4	↑0.4
4/20 06:00	103.6	↑0.2
4/20 06:10	103.8	↑0.2	満潮
4/20 06:20	103.8	0
4/20 06:30	103.6	↓-0.2
4/20 06:40	103.3	↓-0.3
4/20 06:50	102.9	↓-0.4
4/20 07:00	102.3	↓-0.6
4/20 07:10	101.6	↓-0.7
4/20 07:20	100.7	↓-0.9
4/20 07:30	99.7	↓-1.0
4/20 07:40	98.5	↓-1.2
4/20 07:50	97.3	↓-1.2
4/20 08:00	95.9	↓-1.4
4/20 08:10	94.4	↓-1.5
4/20 08:20	92.7	↓-1.7
4/20 08:30	91.0	↓-1.7
4/20 08:40	89.2	↓-1.8
4/20 08:50	87.2	↓-2.0
4/20 09:00	85.2	↓-2.0
4/20 09:10	83.1	↓-2.1
4/20 09:20	80.9	↓-2.2
4/20 09:30	78.7	↓-2.2
4/20 09:40	76.4	↓-2.3
4/20 09:50	74.1	↓-2.3
4/20 10:00	71.7	↓-2.4	最大潮位差
4/20 10:10	69.3	↓-2.4	最大潮位差
4/20 10:20	66.9	↓-2.4	最大潮位差
4/20 10:30	64.5	↓-2.4	最大潮位差
4/20 10:40	62.1	↓-2.4	最大潮位差
4/20 10:50	59.7	↓-2.4	最大潮位差
4/20 11:00	57.3	↓-2.4	最大潮位差
4/20 11:10	55.0	↓-2.3
4/20 11:20	52.6	↓-2.4	最大潮位差
4/20 11:30	50.3	↓-2.3
4/20 11:40	48.1	↓-2.2
4/20 11:50	45.9	↓-2.2
4/20 12:00	43.8	↓-2.1
4/20 12:10	41.8	↓-2.0
4/20 12:20	39.8	↓-2.0
4/20 12:30	37.9	↓-1.9
4/20 12:40	36.1	↓-1.8
4/20 12:50	34.4	↓-1.7
4/20 13:00	32.8	↓-1.6
4/20 13:10	31.3	↓-1.5
4/20 13:20	29.8	↓-1.5
4/20 13:30	28.5	↓-1.3
4/20 13:40	27.3	↓-1.2
4/20 13:50	26.2	↓-1.1
4/20 14:00	25.2	↓-1.0
4/20 14:10	24.3	↓-0.9
4/20 14:20	23.5	↓-0.8
4/20 14:30	22.8	↓-0.7
4/20 14:40	22.2	↓-0.6
4/20 14:50	21.7	↓-0.5
4/20 15:00	21.3	↓-0.4
4/20 15:10	21.0	↓-0.3
4/20 15:20	20.8	↓-0.2
4/20 15:30	20.6	↓-0.2
4/20 15:40	20.6	0	干潮
4/20 15:50	20.6	0
4/20 16:00	20.7	↑0.1
4/20 16:10	20.9	↑0.2
4/20 16:20	21.1	↑0.2
4/20 16:30	21.4	↑0.3
4/20 16:40	21.8	↑0.4
4/20 16:50	22.2	↑0.4
4/20 17:00	22.7	↑0.5
4/20 17:10	23.2	↑0.5
4/20 17:20	23.7	↑0.5
4/20 17:30	24.3	↑0.6
4/20 17:40	24.9	↑0.6
4/20 17:50	25.5	↑0.6
4/20 18:00	26.1	↑0.6
4/20 18:10	26.8	↑0.7
4/20 18:20	27.4	↑0.6
4/20 18:30	28.1	↑0.7
4/20 18:40	28.7	↑0.6
4/20 18:50	29.4	↑0.7
4/20 19:00	30.1	↑0.7
4/20 19:10	30.7	↑0.6
4/20 19:20	31.4	↑0.7
4/20 19:30	32.0	↑0.6
4/20 19:40	32.7	↑0.7
4/20 19:50	33.3	↑0.6
4/20 20:00	33.9	↑0.6
4/20 20:10	34.5	↑0.6
4/20 20:20	35.1	↑0.6
4/20 20:30	35.7	↑0.6
4/20 20:40	36.3	↑0.6
4/20 20:50	36.9	↑0.6
4/20 21:00	37.5	↑0.6
4/20 21:10	38.0	↑0.5
4/20 21:20	38.6	↑0.6
4/20 21:30	39.2	↑0.6
4/20 21:40	39.7	↑0.5
4/20 21:50	40.3	↑0.6
4/20 22:00	40.9	↑0.6
4/20 22:10	41.4	↑0.5
4/20 22:20	42.0	↑0.6
4/20 22:30	42.6	↑0.6
4/20 22:40	43.3	↑0.7
4/20 22:50	43.9	↑0.6
4/20 23:00	44.6	↑0.7
4/20 23:10	45.2	↑0.6
4/20 23:20	46.0	↑0.8
4/20 23:30	46.7	↑0.7
4/20 23:40	47.5	↑0.8
4/20 23:50	48.3	↑0.8