20 (木)	00:14	06:21	11:06	18:03
	96cm	66cm	85cm	34cm
長潮 出 04:59 入 18:17 出 13:07 入 01:38

那珂湊（茨城）2051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	95.1	↑0.3
4/20 00:10	95.2	↑0.1	満潮
4/20 00:20	95.2	0
4/20 00:30	95.0	↓-0.2
4/20 00:40	94.7	↓-0.3
4/20 00:50	94.3	↓-0.4
4/20 01:00	93.8	↓-0.5
4/20 01:10	93.2	↓-0.6
4/20 01:20	92.4	↓-0.8
4/20 01:30	91.6	↓-0.8
4/20 01:40	90.7	↓-0.9
4/20 01:50	89.8	↓-0.9
4/20 02:00	88.8	↓-1.0
4/20 02:10	87.7	↓-1.1
4/20 02:20	86.6	↓-1.1
4/20 02:30	85.4	↓-1.2
4/20 02:40	84.2	↓-1.2
4/20 02:50	83.0	↓-1.2
4/20 03:00	81.8	↓-1.2
4/20 03:10	80.5	↓-1.3
4/20 03:20	79.3	↓-1.2
4/20 03:30	78.1	↓-1.2
4/20 03:40	76.9	↓-1.2
4/20 03:50	75.7	↓-1.2
4/20 04:00	74.6	↓-1.1
4/20 04:10	73.5	↓-1.1
4/20 04:20	72.4	↓-1.1
4/20 04:30	71.4	↓-1.0
4/20 04:40	70.4	↓-1.0
4/20 04:50	69.6	↓-0.8
4/20 05:00	68.8	↓-0.8
4/20 05:10	68.0	↓-0.8
4/20 05:20	67.4	↓-0.6
4/20 05:30	66.9	↓-0.5
4/20 05:40	66.4	↓-0.5
4/20 05:50	66.0	↓-0.4
4/20 06:00	65.8	↓-0.2
4/20 06:10	65.6	↓-0.2
4/20 06:20	65.6	0	干潮
4/20 06:30	65.6	0
4/20 06:40	65.8	↑0.2
4/20 06:50	66.1	↑0.3
4/20 07:00	66.4	↑0.3
4/20 07:10	66.9	↑0.5
4/20 07:20	67.4	↑0.5
4/20 07:30	68.1	↑0.7
4/20 07:40	68.8	↑0.7
4/20 07:50	69.6	↑0.8
4/20 08:00	70.5	↑0.9
4/20 08:10	71.4	↑0.9
4/20 08:20	72.3	↑0.9
4/20 08:30	73.3	↑1.0
4/20 08:40	74.4	↑1.1
4/20 08:50	75.4	↑1.0
4/20 09:00	76.4	↑1.0
4/20 09:10	77.4	↑1.0
4/20 09:20	78.4	↑1.0
4/20 09:30	79.4	↑1.0
4/20 09:40	80.3	↑0.9
4/20 09:50	81.1	↑0.8
4/20 10:00	81.9	↑0.8
4/20 10:10	82.5	↑0.6
4/20 10:20	83.1	↑0.6
4/20 10:30	83.6	↑0.5
4/20 10:40	84.0	↑0.4
4/20 10:50	84.2	↑0.2
4/20 11:00	84.4	↑0.2	満潮
4/20 11:10	84.4	0
4/20 11:20	84.2	↓-0.2
4/20 11:30	84.0	↓-0.2
4/20 11:40	83.6	↓-0.4
4/20 11:50	83.1	↓-0.5
4/20 12:00	82.4	↓-0.7
4/20 12:10	81.6	↓-0.8
4/20 12:20	80.7	↓-0.9
4/20 12:30	79.7	↓-1.0
4/20 12:40	78.5	↓-1.2
4/20 12:50	77.3	↓-1.2
4/20 13:00	75.9	↓-1.4
4/20 13:10	74.4	↓-1.5
4/20 13:20	72.9	↓-1.5
4/20 13:30	71.3	↓-1.6
4/20 13:40	69.6	↓-1.7
4/20 13:50	67.8	↓-1.8
4/20 14:00	66.0	↓-1.8
4/20 14:10	64.2	↓-1.8
4/20 14:20	62.3	↓-1.9
4/20 14:30	60.4	↓-1.9
4/20 14:40	58.5	↓-1.9
4/20 14:50	56.6	↓-1.9
4/20 15:00	54.7	↓-1.9
4/20 15:10	52.8	↓-1.9
4/20 15:20	51.0	↓-1.8
4/20 15:30	49.2	↓-1.8
4/20 15:40	47.4	↓-1.8
4/20 15:50	45.7	↓-1.7
4/20 16:00	44.1	↓-1.6
4/20 16:10	42.5	↓-1.6
4/20 16:20	41.1	↓-1.4
4/20 16:30	39.7	↓-1.4
4/20 16:40	38.5	↓-1.2
4/20 16:50	37.4	↓-1.1
4/20 17:00	36.3	↓-1.1
4/20 17:10	35.5	↓-0.8
4/20 17:20	34.7	↓-0.8
4/20 17:30	34.1	↓-0.6
4/20 17:40	33.7	↓-0.4
4/20 17:50	33.4	↓-0.3
4/20 18:00	33.3	↓-0.1	干潮
4/20 18:10	33.4	↑0.1
4/20 18:20	33.6	↑0.2
4/20 18:30	34.0	↑0.4
4/20 18:40	34.6	↑0.6
4/20 18:50	35.3	↑0.7
4/20 19:00	36.2	↑0.9
4/20 19:10	37.3	↑1.1
4/20 19:20	38.6	↑1.3
4/20 19:30	40.0	↑1.4
4/20 19:40	41.6	↑1.6
4/20 19:50	43.3	↑1.7
4/20 20:00	45.1	↑1.8
4/20 20:10	47.1	↑2.0
4/20 20:20	49.2	↑2.1
4/20 20:30	51.4	↑2.2
4/20 20:40	53.7	↑2.3
4/20 20:50	56.1	↑2.4
4/20 21:00	58.5	↑2.4
4/20 21:10	61.0	↑2.5
4/20 21:20	63.5	↑2.5
4/20 21:30	66.1	↑2.6	最大潮位差
4/20 21:40	68.6	↑2.5
4/20 21:50	71.1	↑2.5
4/20 22:00	73.6	↑2.5
4/20 22:10	76.0	↑2.4
4/20 22:20	78.4	↑2.4
4/20 22:30	80.7	↑2.3
4/20 22:40	82.9	↑2.2
4/20 22:50	85.0	↑2.1
4/20 23:00	87.0	↑2.0
4/20 23:10	88.8	↑1.8
4/20 23:20	90.6	↑1.8
4/20 23:30	92.1	↑1.5
4/20 23:40	93.5	↑1.4
4/20 23:50	94.8	↑1.3