20 (日)	04:26	10:58	17:47	23:16
	112cm	4cm	115cm	53cm
大潮 出 04:59 入 18:17 出 06:04 入 19:52 潮干狩り ◎ 08:47～13:10

那珂湊（茨城）2053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	52.7	↑2.0
4/20 00:10	54.8	↑2.1
4/20 00:20	57.1	↑2.3
4/20 00:30	59.6	↑2.5
4/20 00:40	62.2	↑2.6
4/20 00:50	64.9	↑2.7
4/20 01:00	67.8	↑2.9
4/20 01:10	70.7	↑2.9
4/20 01:20	73.6	↑2.9
4/20 01:30	76.6	↑3.0
4/20 01:40	79.6	↑3.0
4/20 01:50	82.6	↑3.0
4/20 02:00	85.6	↑3.0
4/20 02:10	88.5	↑2.9
4/20 02:20	91.3	↑2.8
4/20 02:30	94.0	↑2.7
4/20 02:40	96.5	↑2.5
4/20 02:50	99.0	↑2.5
4/20 03:00	101.2	↑2.2
4/20 03:10	103.3	↑2.1
4/20 03:20	105.2	↑1.9
4/20 03:30	106.8	↑1.6
4/20 03:40	108.2	↑1.4
4/20 03:50	109.3	↑1.1
4/20 04:00	110.2	↑0.9
4/20 04:10	110.8	↑0.6
4/20 04:20	111.1	↑0.3	満潮
4/20 04:30	111.1	0
4/20 04:40	110.8	↓-0.3
4/20 04:50	110.2	↓-0.6
4/20 05:00	109.3	↓-0.9
4/20 05:10	108.0	↓-1.3
4/20 05:20	106.5	↓-1.5
4/20 05:30	104.6	↓-1.9
4/20 05:40	102.5	↓-2.1
4/20 05:50	100.0	↓-2.5
4/20 06:00	97.3	↓-2.7
4/20 06:10	94.3	↓-3.0
4/20 06:20	91.1	↓-3.2
4/20 06:30	87.7	↓-3.4
4/20 06:40	84.0	↓-3.7
4/20 06:50	80.2	↓-3.8
4/20 07:00	76.1	↓-4.1
4/20 07:10	72.0	↓-4.1
4/20 07:20	67.7	↓-4.3
4/20 07:30	63.4	↓-4.3
4/20 07:40	59.0	↓-4.4	最大潮位差
4/20 07:50	54.6	↓-4.4	最大潮位差
4/20 08:00	50.2	↓-4.4	最大潮位差
4/20 08:10	45.9	↓-4.3
4/20 08:20	41.6	↓-4.3
4/20 08:30	37.4	↓-4.2
4/20 08:40	33.4	↓-4.0
4/20 08:50	29.5	↓-3.9
4/20 09:00	25.8	↓-3.7
4/20 09:10	22.3	↓-3.5
4/20 09:20	19.0	↓-3.3
4/20 09:30	16.0	↓-3.0
4/20 09:40	13.3	↓-2.7
4/20 09:50	10.8	↓-2.5
4/20 10:00	8.7	↓-2.1
4/20 10:10	6.9	↓-1.8
4/20 10:20	5.5	↓-1.4
4/20 10:30	4.4	↓-1.1
4/20 10:40	3.6	↓-0.8
4/20 10:50	3.2	↓-0.4	干潮
4/20 11:00	3.1	↓-0.1
4/20 11:10	3.4	↑0.3
4/20 11:20	4.1	↑0.7
4/20 11:30	5.1	↑1.0
4/20 11:40	6.4	↑1.3
4/20 11:50	8.0	↑1.6
4/20 12:00	10.0	↑2.0
4/20 12:10	12.2	↑2.2
4/20 12:20	14.8	↑2.6
4/20 12:30	17.6	↑2.8
4/20 12:40	20.6	↑3.0
4/20 12:50	23.8	↑3.2
4/20 13:00	27.3	↑3.5
4/20 13:10	30.9	↑3.6
4/20 13:20	34.7	↑3.8
4/20 13:30	38.7	↑4.0
4/20 13:40	42.7	↑4.0
4/20 13:50	46.8	↑4.1
4/20 14:00	51.0	↑4.2
4/20 14:10	55.3	↑4.3
4/20 14:20	59.5	↑4.2
4/20 14:30	63.8	↑4.3
4/20 14:40	68.0	↑4.2
4/20 14:50	72.1	↑4.1
4/20 15:00	76.2	↑4.1
4/20 15:10	80.1	↑3.9
4/20 15:20	84.0	↑3.9
4/20 15:30	87.6	↑3.6
4/20 15:40	91.2	↑3.6
4/20 15:50	94.5	↑3.3
4/20 16:00	97.6	↑3.1
4/20 16:10	100.5	↑2.9
4/20 16:20	103.1	↑2.6
4/20 16:30	105.5	↑2.4
4/20 16:40	107.6	↑2.1
4/20 16:50	109.5	↑1.9
4/20 17:00	111.0	↑1.5
4/20 17:10	112.3	↑1.3
4/20 17:20	113.2	↑0.9
4/20 17:30	113.9	↑0.7
4/20 17:40	114.2	↑0.3	満潮
4/20 17:50	114.2	0
4/20 18:00	114.0	↓-0.2
4/20 18:10	113.4	↓-0.6
4/20 18:20	112.5	↓-0.9
4/20 18:30	111.4	↓-1.1
4/20 18:40	110.0	↓-1.4
4/20 18:50	108.3	↓-1.7
4/20 19:00	106.4	↓-1.9
4/20 19:10	104.3	↓-2.1
4/20 19:20	102.0	↓-2.3
4/20 19:30	99.5	↓-2.5
4/20 19:40	96.9	↓-2.6
4/20 19:50	94.2	↓-2.7
4/20 20:00	91.3	↓-2.9
4/20 20:10	88.4	↓-2.9
4/20 20:20	85.5	↓-2.9
4/20 20:30	82.5	↓-3.0
4/20 20:40	79.6	↓-2.9
4/20 20:50	76.7	↓-2.9
4/20 21:00	73.8	↓-2.9
4/20 21:10	71.1	↓-2.7
4/20 21:20	68.4	↓-2.7
4/20 21:30	65.9	↓-2.5
4/20 21:40	63.6	↓-2.3
4/20 21:50	61.4	↓-2.2
4/20 22:00	59.5	↓-1.9
4/20 22:10	57.8	↓-1.7
4/20 22:20	56.2	↓-1.6
4/20 22:30	55.0	↓-1.2
4/20 22:40	53.9	↓-1.1
4/20 22:50	53.2	↓-0.7
4/20 23:00	52.6	↓-0.6
4/20 23:10	52.4	↓-0.2	干潮
4/20 23:20	52.4	0
4/20 23:30	52.6	↑0.2
4/20 23:40	53.2	↑0.6
4/20 23:50	53.9	↑0.7