20 (水)	04:42	10:40	16:33	23:01
	153cm	55cm	152cm	28cm
大潮 出 05:24 入 17:39 出 06:56 入 18:08

日立（茨城）2028年09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
9/20 00:00	55.5	↑3.3
9/20 00:10	59.2	↑3.7
9/20 00:20	63.2	↑4.0
9/20 00:30	67.3	↑4.1
9/20 00:40	71.7	↑4.4
9/20 00:50	76.3	↑4.6
9/20 01:00	80.9	↑4.6
9/20 01:10	85.7	↑4.8
9/20 01:20	90.6	↑4.9
9/20 01:30	95.4	↑4.8
9/20 01:40	100.3	↑4.9
9/20 01:50	105.1	↑4.8
9/20 02:00	109.8	↑4.7
9/20 02:10	114.4	↑4.6
9/20 02:20	118.9	↑4.5
9/20 02:30	123.1	↑4.2
9/20 02:40	127.2	↑4.1
9/20 02:50	131.0	↑3.8
9/20 03:00	134.6	↑3.6
9/20 03:10	137.9	↑3.3
9/20 03:20	140.9	↑3.0
9/20 03:30	143.7	↑2.8
9/20 03:40	146.0	↑2.3
9/20 03:50	148.1	↑2.1
9/20 04:00	149.8	↑1.7
9/20 04:10	151.1	↑1.3
9/20 04:20	152.1	↑1.0
9/20 04:30	152.7	↑0.6
9/20 04:40	153.0	↑0.3	満潮
9/20 04:50	152.8	↓-0.2
9/20 05:00	152.3	↓-0.5
9/20 05:10	151.4	↓-0.9
9/20 05:20	150.1	↓-1.3
9/20 05:30	148.5	↓-1.6
9/20 05:40	146.5	↓-2.0
9/20 05:50	144.2	↓-2.3
9/20 06:00	141.5	↓-2.7
9/20 06:10	138.5	↓-3.0
9/20 06:20	135.3	↓-3.2
9/20 06:30	131.8	↓-3.5
9/20 06:40	128.0	↓-3.8
9/20 06:50	124.1	↓-3.9
9/20 07:00	120.0	↓-4.1
9/20 07:10	115.7	↓-4.3
9/20 07:20	111.4	↓-4.3
9/20 07:30	107.0	↓-4.4
9/20 07:40	102.7	↓-4.3
9/20 07:50	98.3	↓-4.4
9/20 08:00	94.0	↓-4.3
9/20 08:10	89.8	↓-4.2
9/20 08:20	85.7	↓-4.1
9/20 08:30	81.7	↓-4.0
9/20 08:40	78.0	↓-3.7
9/20 08:50	74.4	↓-3.6
9/20 09:00	71.1	↓-3.3
9/20 09:10	68.1	↓-3.0
9/20 09:20	65.3	↓-2.8
9/20 09:30	62.8	↓-2.5
9/20 09:40	60.6	↓-2.2
9/20 09:50	58.7	↓-1.9
9/20 10:00	57.2	↓-1.5
9/20 10:10	56.0	↓-1.2
9/20 10:20	55.2	↓-0.8
9/20 10:30	54.7	↓-0.5	干潮
9/20 10:40	54.5	↓-0.2	干潮
9/20 10:50	54.8	↑0.3
9/20 11:00	55.4	↑0.6
9/20 11:10	56.3	↑0.9
9/20 11:20	57.7	↑1.4
9/20 11:30	59.3	↑1.6
9/20 11:40	61.4	↑2.1
9/20 11:50	63.7	↑2.3
9/20 12:00	66.4	↑2.7
9/20 12:10	69.3	↑2.9
9/20 12:20	72.6	↑3.3
9/20 12:30	76.1	↑3.5
9/20 12:40	79.8	↑3.7
9/20 12:50	83.8	↑4.0
9/20 13:00	87.8	↑4.0
9/20 13:10	92.1	↑4.3
9/20 13:20	96.4	↑4.3
9/20 13:30	100.7	↑4.3
9/20 13:40	105.1	↑4.4
9/20 13:50	109.5	↑4.4
9/20 14:00	113.8	↑4.3
9/20 14:10	117.9	↑4.1
9/20 14:20	122.0	↑4.1
9/20 14:30	125.9	↑3.9
9/20 14:40	129.6	↑3.7
9/20 14:50	133.1	↑3.5
9/20 15:00	136.4	↑3.3
9/20 15:10	139.4	↑3.0
9/20 15:20	142.0	↑2.6
9/20 15:30	144.4	↑2.4
9/20 15:40	146.5	↑2.1
9/20 15:50	148.2	↑1.7
9/20 16:00	149.6	↑1.4
9/20 16:10	150.6	↑1.0
9/20 16:20	151.2	↑0.6
9/20 16:30	151.5	↑0.3	満潮
9/20 16:40	151.3	↓-0.2
9/20 16:50	150.9	↓-0.4
9/20 17:00	150.0	↓-0.9
9/20 17:10	148.7	↓-1.3
9/20 17:20	147.1	↓-1.6
9/20 17:30	145.1	↓-2.0
9/20 17:40	142.7	↓-2.4
9/20 17:50	139.9	↓-2.8
9/20 18:00	136.9	↓-3.0
9/20 18:10	133.5	↓-3.4
9/20 18:20	129.7	↓-3.8
9/20 18:30	125.7	↓-4.0
9/20 18:40	121.5	↓-4.2
9/20 18:50	117.0	↓-4.5
9/20 19:00	112.3	↓-4.7
9/20 19:10	107.5	↓-4.8
9/20 19:20	102.5	↓-5.0
9/20 19:30	97.5	↓-5.0
9/20 19:40	92.3	↓-5.2	最大潮位差
9/20 19:50	87.2	↓-5.1
9/20 20:00	82.1	↓-5.1
9/20 20:10	77.1	↓-5.0
9/20 20:20	72.1	↓-5.0
9/20 20:30	67.3	↓-4.8
9/20 20:40	62.6	↓-4.7
9/20 20:50	58.2	↓-4.4
9/20 21:00	53.9	↓-4.3
9/20 21:10	49.9	↓-4.0
9/20 21:20	46.2	↓-3.7
9/20 21:30	42.8	↓-3.4
9/20 21:40	39.7	↓-3.1
9/20 21:50	36.9	↓-2.8
9/20 22:00	34.4	↓-2.5
9/20 22:10	32.3	↓-2.1
9/20 22:20	30.6	↓-1.7
9/20 22:30	29.2	↓-1.4
9/20 22:40	28.2	↓-1.0
9/20 22:50	27.7	↓-0.5
9/20 23:00	27.5	↓-0.2	干潮
9/20 23:10	27.7	↑0.2
9/20 23:20	28.3	↑0.6
9/20 23:30	29.3	↑1.0
9/20 23:40	30.7	↑1.4
9/20 23:50	32.4	↑1.7