21 (木)	04:20	09:37	15:39	22:38
	88cm	52cm	105cm	21cm
中潮 出 05:07 入 17:21 出 08:10 入 18:10

コイセボイ（北海道）2028年09月21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
9/21 00:00	40.4	↑2.2
9/21 00:10	42.8	↑2.4
9/21 00:20	45.2	↑2.4
9/21 00:30	47.7	↑2.5
9/21 00:40	50.3	↑2.6
9/21 00:50	52.9	↑2.6
9/21 01:00	55.5	↑2.6
9/21 01:10	58.1	↑2.6
9/21 01:20	60.7	↑2.6
9/21 01:30	63.3	↑2.6
9/21 01:40	65.8	↑2.5
9/21 01:50	68.2	↑2.4
9/21 02:00	70.6	↑2.4
9/21 02:10	72.8	↑2.2
9/21 02:20	74.9	↑2.1
9/21 02:30	76.9	↑2.0
9/21 02:40	78.8	↑1.9
9/21 02:50	80.5	↑1.7
9/21 03:00	82.1	↑1.6
9/21 03:10	83.4	↑1.3
9/21 03:20	84.7	↑1.3
9/21 03:30	85.7	↑1.0
9/21 03:40	86.5	↑0.8
9/21 03:50	87.2	↑0.7
9/21 04:00	87.6	↑0.4
9/21 04:10	87.9	↑0.3	満潮
9/21 04:20	87.9	0	満潮
9/21 04:30	87.8	↓-0.1
9/21 04:40	87.5	↓-0.3
9/21 04:50	87.0	↓-0.5
9/21 05:00	86.4	↓-0.6
9/21 05:10	85.6	↓-0.8
9/21 05:20	84.6	↓-1.0
9/21 05:30	83.5	↓-1.1
9/21 05:40	82.3	↓-1.2
9/21 05:50	80.9	↓-1.4
9/21 06:00	79.5	↓-1.4
9/21 06:10	77.9	↓-1.6
9/21 06:20	76.3	↓-1.6
9/21 06:30	74.6	↓-1.7
9/21 06:40	72.9	↓-1.7
9/21 06:50	71.2	↓-1.7
9/21 07:00	69.4	↓-1.8
9/21 07:10	67.7	↓-1.7
9/21 07:20	65.9	↓-1.8
9/21 07:30	64.2	↓-1.7
9/21 07:40	62.6	↓-1.6
9/21 07:50	61.0	↓-1.6
9/21 08:00	59.6	↓-1.4
9/21 08:10	58.2	↓-1.4
9/21 08:20	56.9	↓-1.3
9/21 08:30	55.8	↓-1.1
9/21 08:40	54.7	↓-1.1
9/21 08:50	53.9	↓-0.8
9/21 09:00	53.2	↓-0.7
9/21 09:10	52.6	↓-0.6
9/21 09:20	52.2	↓-0.4
9/21 09:30	52.0	↓-0.2	干潮
9/21 09:40	52.0	0
9/21 09:50	52.2	↑0.2
9/21 10:00	52.5	↑0.3
9/21 10:10	53.0	↑0.5
9/21 10:20	53.7	↑0.7
9/21 10:30	54.6	↑0.9
9/21 10:40	55.6	↑1.0
9/21 10:50	56.8	↑1.2
9/21 11:00	58.2	↑1.4
9/21 11:10	59.7	↑1.5
9/21 11:20	61.4	↑1.7
9/21 11:30	63.2	↑1.8
9/21 11:40	65.1	↑1.9
9/21 11:50	67.1	↑2.0
9/21 12:00	69.2	↑2.1
9/21 12:10	71.3	↑2.1
9/21 12:20	73.6	↑2.3
9/21 12:30	75.8	↑2.2
9/21 12:40	78.1	↑2.3
9/21 12:50	80.4	↑2.3
9/21 13:00	82.7	↑2.3
9/21 13:10	84.9	↑2.2
9/21 13:20	87.2	↑2.3
9/21 13:30	89.3	↑2.1
9/21 13:40	91.4	↑2.1
9/21 13:50	93.3	↑1.9
9/21 14:00	95.2	↑1.9
9/21 14:10	96.9	↑1.7
9/21 14:20	98.5	↑1.6
9/21 14:30	99.9	↑1.4
9/21 14:40	101.2	↑1.3
9/21 14:50	102.3	↑1.1
9/21 15:00	103.2	↑0.9
9/21 15:10	103.9	↑0.7
9/21 15:20	104.4	↑0.5
9/21 15:30	104.7	↑0.3	満潮
9/21 15:40	104.7	0
9/21 15:50	104.6	↓-0.1
9/21 16:00	104.2	↓-0.4
9/21 16:10	103.6	↓-0.6
9/21 16:20	102.7	↓-0.9
9/21 16:30	101.7	↓-1.0
9/21 16:40	100.4	↓-1.3
9/21 16:50	98.9	↓-1.5
9/21 17:00	97.2	↓-1.7
9/21 17:10	95.3	↓-1.9
9/21 17:20	93.3	↓-2.0
9/21 17:30	91.0	↓-2.3
9/21 17:40	88.6	↓-2.4
9/21 17:50	86.0	↓-2.6
9/21 18:00	83.3	↓-2.7
9/21 18:10	80.5	↓-2.8
9/21 18:20	77.6	↓-2.9
9/21 18:30	74.6	↓-3.0
9/21 18:40	71.5	↓-3.1
9/21 18:50	68.4	↓-3.1
9/21 19:00	65.2	↓-3.2	最大潮位差
9/21 19:10	62.1	↓-3.1
9/21 19:20	58.9	↓-3.2	最大潮位差
9/21 19:30	55.7	↓-3.2	最大潮位差
9/21 19:40	52.6	↓-3.1
9/21 19:50	49.6	↓-3.0
9/21 20:00	46.6	↓-3.0
9/21 20:10	43.7	↓-2.9
9/21 20:20	41.0	↓-2.7
9/21 20:30	38.3	↓-2.7
9/21 20:40	35.8	↓-2.5
9/21 20:50	33.5	↓-2.3
9/21 21:00	31.3	↓-2.2
9/21 21:10	29.4	↓-1.9
9/21 21:20	27.6	↓-1.8
9/21 21:30	26.0	↓-1.6
9/21 21:40	24.6	↓-1.4
9/21 21:50	23.4	↓-1.2
9/21 22:00	22.5	↓-0.9
9/21 22:10	21.8	↓-0.7
9/21 22:20	21.3	↓-0.5
9/21 22:30	21.0	↓-0.3	干潮
9/21 22:40	21.0	0
9/21 22:50	21.1	↑0.1
9/21 23:00	21.5	↑0.4
9/21 23:10	22.2	↑0.7
9/21 23:20	23.0	↑0.8
9/21 23:30	24.0	↑1.0
9/21 23:40	25.2	↑1.2
9/21 23:50	26.6	↑1.4