20 (火)	00:55	06:57	12:12	18:38
	98cm	71cm	90cm	46cm
若潮 出 04:58 入 18:17 出 13:18 入 01:44

日立（茨城）2032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	95.7	↑0.6
4/20 00:10	96.2	↑0.5
4/20 00:20	96.7	↑0.5
4/20 00:30	97.0	↑0.3
4/20 00:40	97.2	↑0.2
4/20 00:50	97.3	↑0.1	満潮
4/20 01:00	97.3	0
4/20 01:10	97.1	↓-0.2
4/20 01:20	96.9	↓-0.2
4/20 01:30	96.6	↓-0.3
4/20 01:40	96.1	↓-0.5
4/20 01:50	95.6	↓-0.5
4/20 02:00	94.9	↓-0.7
4/20 02:10	94.2	↓-0.7
4/20 02:20	93.4	↓-0.8
4/20 02:30	92.4	↓-1.0
4/20 02:40	91.5	↓-0.9
4/20 02:50	90.4	↓-1.1
4/20 03:00	89.3	↓-1.1
4/20 03:10	88.1	↓-1.2
4/20 03:20	86.9	↓-1.2
4/20 03:30	85.7	↓-1.2
4/20 03:40	84.5	↓-1.2
4/20 03:50	83.2	↓-1.3
4/20 04:00	82.0	↓-1.2
4/20 04:10	80.8	↓-1.2
4/20 04:20	79.6	↓-1.2
4/20 04:30	78.5	↓-1.1
4/20 04:40	77.4	↓-1.1
4/20 04:50	76.4	↓-1.0
4/20 05:00	75.5	↓-0.9
4/20 05:10	74.6	↓-0.9
4/20 05:20	73.8	↓-0.8
4/20 05:30	73.0	↓-0.8
4/20 05:40	72.4	↓-0.6
4/20 05:50	71.8	↓-0.6
4/20 06:00	71.3	↓-0.5
4/20 06:10	70.9	↓-0.4
4/20 06:20	70.5	↓-0.4
4/20 06:30	70.3	↓-0.2
4/20 06:40	70.1	↓-0.2
4/20 06:50	70.0	↓-0.1	干潮
4/20 07:00	70.0	0
4/20 07:10	70.1	↑0.1
4/20 07:20	70.3	↑0.2
4/20 07:30	70.5	↑0.2
4/20 07:40	70.8	↑0.3
4/20 07:50	71.3	↑0.5
4/20 08:00	71.8	↑0.5
4/20 08:10	72.3	↑0.5
4/20 08:20	73.0	↑0.7
4/20 08:30	73.7	↑0.7
4/20 08:40	74.5	↑0.8
4/20 08:50	75.3	↑0.8
4/20 09:00	76.2	↑0.9
4/20 09:10	77.1	↑0.9
4/20 09:20	78.1	↑1.0
4/20 09:30	79.1	↑1.0
4/20 09:40	80.0	↑0.9
4/20 09:50	81.0	↑1.0
4/20 10:00	82.0	↑1.0
4/20 10:10	82.9	↑0.9
4/20 10:20	83.8	↑0.9
4/20 10:30	84.7	↑0.9
4/20 10:40	85.5	↑0.8
4/20 10:50	86.2	↑0.7
4/20 11:00	86.9	↑0.7
4/20 11:10	87.5	↑0.6
4/20 11:20	88.0	↑0.5
4/20 11:30	88.4	↑0.4
4/20 11:40	88.8	↑0.4
4/20 11:50	89.0	↑0.2
4/20 12:00	89.2	↑0.2
4/20 12:10	89.3	↑0.1	満潮
4/20 12:20	89.2	↓-0.1
4/20 12:30	89.1	↓-0.1
4/20 12:40	88.8	↓-0.3
4/20 12:50	88.5	↓-0.3
4/20 13:00	88.0	↓-0.5
4/20 13:10	87.4	↓-0.6
4/20 13:20	86.7	↓-0.7
4/20 13:30	85.9	↓-0.8
4/20 13:40	85.0	↓-0.9
4/20 13:50	84.0	↓-1.0
4/20 14:00	82.8	↓-1.2
4/20 14:10	81.6	↓-1.2
4/20 14:20	80.2	↓-1.4
4/20 14:30	78.7	↓-1.5
4/20 14:40	77.2	↓-1.5
4/20 14:50	75.5	↓-1.7
4/20 15:00	73.8	↓-1.7
4/20 15:10	72.0	↓-1.8
4/20 15:20	70.2	↓-1.8
4/20 15:30	68.4	↓-1.8
4/20 15:40	66.5	↓-1.9
4/20 15:50	64.6	↓-1.9
4/20 16:00	62.7	↓-1.9
4/20 16:10	60.9	↓-1.8
4/20 16:20	59.1	↓-1.8
4/20 16:30	57.4	↓-1.7
4/20 16:40	55.8	↓-1.6
4/20 16:50	54.2	↓-1.6
4/20 17:00	52.8	↓-1.4
4/20 17:10	51.5	↓-1.3
4/20 17:20	50.3	↓-1.2
4/20 17:30	49.2	↓-1.1
4/20 17:40	48.2	↓-1.0
4/20 17:50	47.5	↓-0.7
4/20 18:00	46.8	↓-0.7
4/20 18:10	46.3	↓-0.5
4/20 18:20	46.0	↓-0.3
4/20 18:30	45.8	↓-0.2	干潮
4/20 18:40	45.7	↓-0.1
4/20 18:50	45.8	↑0.1
4/20 19:00	46.1	↑0.3
4/20 19:10	46.5	↑0.4
4/20 19:20	47.1	↑0.6
4/20 19:30	47.9	↑0.8
4/20 19:40	48.8	↑0.9
4/20 19:50	49.8	↑1.0
4/20 20:00	51.0	↑1.2
4/20 20:10	52.3	↑1.3
4/20 20:20	53.8	↑1.5
4/20 20:30	55.4	↑1.6
4/20 20:40	57.1	↑1.7
4/20 20:50	58.9	↑1.8
4/20 21:00	60.9	↑2.0
4/20 21:10	62.9	↑2.0
4/20 21:20	65.0	↑2.1
4/20 21:30	67.1	↑2.1
4/20 21:40	69.3	↑2.2
4/20 21:50	71.5	↑2.2
4/20 22:00	73.8	↑2.3	最大潮位差
4/20 22:10	76.0	↑2.2
4/20 22:20	78.2	↑2.2
4/20 22:30	80.4	↑2.2
4/20 22:40	82.5	↑2.1
4/20 22:50	84.6	↑2.1
4/20 23:00	86.6	↑2.0
4/20 23:10	88.5	↑1.9
4/20 23:20	90.3	↑1.8
4/20 23:30	92.0	↑1.7
4/20 23:40	93.6	↑1.6
4/20 23:50	95.0	↑1.4