01 (火)	00:31	02:53	08:21	17:14
	86cm	85cm	96cm	38cm
長潮 出 05:25 入 18:00 出 11:47 入 01:14

日立（茨城）2031年04月01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
4/1 00:00	85.5	↑0.1
4/1 00:10	85.6	↑0.1
4/1 00:20	85.6	0
4/1 00:30	85.6	0	満潮
4/1 00:40	85.6	0
4/1 00:50	85.6	0
4/1 01:00	85.5	↓-0.1
4/1 01:10	85.4	↓-0.1
4/1 01:20	85.4	0
4/1 01:30	85.3	↓-0.1
4/1 01:40	85.2	↓-0.1
4/1 01:50	85.1	↓-0.1
4/1 02:00	85.0	↓-0.1
4/1 02:10	84.9	↓-0.1
4/1 02:20	84.8	↓-0.1
4/1 02:30	84.8	0
4/1 02:40	84.7	↓-0.1
4/1 02:50	84.7	0	干潮
4/1 03:00	84.7	0
4/1 03:10	84.7	0
4/1 03:20	84.8	↑0.1
4/1 03:30	85.0	↑0.2
4/1 03:40	85.1	↑0.1
4/1 03:50	85.3	↑0.2
4/1 04:00	85.6	↑0.3
4/1 04:10	85.9	↑0.3
4/1 04:20	86.2	↑0.3
4/1 04:30	86.6	↑0.4
4/1 04:40	87.0	↑0.4
4/1 04:50	87.5	↑0.5
4/1 05:00	88.0	↑0.5
4/1 05:10	88.5	↑0.5
4/1 05:20	89.0	↑0.5
4/1 05:30	89.6	↑0.6
4/1 05:40	90.1	↑0.5
4/1 05:50	90.6	↑0.5
4/1 06:00	91.2	↑0.6
4/1 06:10	91.7	↑0.5
4/1 06:20	92.2	↑0.5
4/1 06:30	92.7	↑0.5
4/1 06:40	93.1	↑0.4
4/1 06:50	93.5	↑0.4
4/1 07:00	93.9	↑0.4
4/1 07:10	94.3	↑0.4
4/1 07:20	94.6	↑0.3
4/1 07:30	94.9	↑0.3
4/1 07:40	95.1	↑0.2
4/1 07:50	95.3	↑0.2
4/1 08:00	95.5	↑0.2
4/1 08:10	95.5	0
4/1 08:20	95.6	↑0.1	満潮
4/1 08:30	95.5	↓-0.1
4/1 08:40	95.4	↓-0.1
4/1 08:50	95.3	↓-0.1
4/1 09:00	95.0	↓-0.3
4/1 09:10	94.7	↓-0.3
4/1 09:20	94.3	↓-0.4
4/1 09:30	93.9	↓-0.4
4/1 09:40	93.3	↓-0.6
4/1 09:50	92.7	↓-0.6
4/1 10:00	92.0	↓-0.7
4/1 10:10	91.2	↓-0.8
4/1 10:20	90.3	↓-0.9
4/1 10:30	89.4	↓-0.9
4/1 10:40	88.4	↓-1.0
4/1 10:50	87.3	↓-1.1
4/1 11:00	86.1	↓-1.2
4/1 11:10	84.9	↓-1.2
4/1 11:20	83.6	↓-1.3
4/1 11:30	82.3	↓-1.3
4/1 11:40	80.9	↓-1.4
4/1 11:50	79.5	↓-1.4
4/1 12:00	78.0	↓-1.5
4/1 12:10	76.5	↓-1.5
4/1 12:20	74.9	↓-1.6
4/1 12:30	73.3	↓-1.6
4/1 12:40	71.7	↓-1.6
4/1 12:50	70.1	↓-1.6
4/1 13:00	68.5	↓-1.6
4/1 13:10	66.8	↓-1.7
4/1 13:20	65.1	↓-1.7
4/1 13:30	63.4	↓-1.7
4/1 13:40	61.7	↓-1.7
4/1 13:50	60.0	↓-1.7
4/1 14:00	58.3	↓-1.7
4/1 14:10	56.6	↓-1.7
4/1 14:20	54.9	↓-1.7
4/1 14:30	53.3	↓-1.6
4/1 14:40	51.7	↓-1.6
4/1 14:50	50.1	↓-1.6
4/1 15:00	48.6	↓-1.5
4/1 15:10	47.1	↓-1.5
4/1 15:20	45.8	↓-1.3
4/1 15:30	44.5	↓-1.3
4/1 15:40	43.3	↓-1.2
4/1 15:50	42.2	↓-1.1
4/1 16:00	41.2	↓-1.0
4/1 16:10	40.3	↓-0.9
4/1 16:20	39.6	↓-0.7
4/1 16:30	38.9	↓-0.7
4/1 16:40	38.4	↓-0.5
4/1 16:50	38.1	↓-0.3
4/1 17:00	37.8	↓-0.3
4/1 17:10	37.7	↓-0.1	干潮
4/1 17:20	37.8	↑0.1
4/1 17:30	37.9	↑0.1
4/1 17:40	38.2	↑0.3
4/1 17:50	38.6	↑0.4
4/1 18:00	39.1	↑0.5
4/1 18:10	39.7	↑0.6
4/1 18:20	40.5	↑0.8
4/1 18:30	41.3	↑0.8
4/1 18:40	42.3	↑1.0
4/1 18:50	43.3	↑1.0
4/1 19:00	44.4	↑1.1
4/1 19:10	45.7	↑1.3
4/1 19:20	47.0	↑1.3
4/1 19:30	48.4	↑1.4
4/1 19:40	49.8	↑1.4
4/1 19:50	51.4	↑1.6
4/1 20:00	53.0	↑1.6
4/1 20:10	54.6	↑1.6
4/1 20:20	56.3	↑1.7
4/1 20:30	58.0	↑1.7
4/1 20:40	59.8	↑1.8	最大潮位差
4/1 20:50	61.5	↑1.7
4/1 21:00	63.3	↑1.8	最大潮位差
4/1 21:10	65.1	↑1.8	最大潮位差
4/1 21:20	66.8	↑1.7
4/1 21:30	68.6	↑1.8	最大潮位差
4/1 21:40	70.3	↑1.7
4/1 21:50	71.9	↑1.6
4/1 22:00	73.5	↑1.6
4/1 22:10	75.1	↑1.6
4/1 22:20	76.6	↑1.5
4/1 22:30	78.0	↑1.4
4/1 22:40	79.4	↑1.4
4/1 22:50	80.7	↑1.3
4/1 23:00	81.9	↑1.2
4/1 23:10	83.1	↑1.2
4/1 23:20	84.1	↑1.0
4/1 23:30	85.1	↑1.0
4/1 23:40	86.1	↑1.0
4/1 23:50	86.9	↑0.8