20 (火)	04:08	10:37	17:09	22:50
	128cm	5cm	128cm	45cm
大潮 出 04:59 入 18:17 出 19:16 入 05:38 潮干狩り ◎ 08:32～12:39

日立（茨城）2038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	53.5	↑3.3
4/20 00:10	57.0	↑3.5
4/20 00:20	60.7	↑3.7
4/20 00:30	64.6	↑3.9
4/20 00:40	68.6	↑4.0
4/20 00:50	72.7	↑4.1
4/20 01:00	76.9	↑4.2
4/20 01:10	81.1	↑4.2
4/20 01:20	85.3	↑4.2
4/20 01:30	89.5	↑4.2
4/20 01:40	93.6	↑4.1
4/20 01:50	97.5	↑3.9
4/20 02:00	101.4	↑3.9
4/20 02:10	105.1	↑3.7
4/20 02:20	108.5	↑3.4
4/20 02:30	111.8	↑3.3
4/20 02:40	114.8	↑3.0
4/20 02:50	117.5	↑2.7
4/20 03:00	119.9	↑2.4
4/20 03:10	122.0	↑2.1
4/20 03:20	123.9	↑1.9
4/20 03:30	125.3	↑1.4
4/20 03:40	126.5	↑1.2
4/20 03:50	127.3	↑0.8
4/20 04:00	127.7	↑0.4	満潮
4/20 04:10	127.8	↑0.1
4/20 04:20	127.5	↓-0.3
4/20 04:30	126.8	↓-0.7
4/20 04:40	125.8	↓-1.0
4/20 04:50	124.4	↓-1.4
4/20 05:00	122.6	↓-1.8
4/20 05:10	120.4	↓-2.2
4/20 05:20	117.9	↓-2.5
4/20 05:30	115.1	↓-2.8
4/20 05:40	111.9	↓-3.2
4/20 05:50	108.4	↓-3.5
4/20 06:00	104.7	↓-3.7
4/20 06:10	100.6	↓-4.1
4/20 06:20	96.3	↓-4.3
4/20 06:30	91.8	↓-4.5
4/20 06:40	87.1	↓-4.7
4/20 06:50	82.3	↓-4.8
4/20 07:00	77.3	↓-5.0
4/20 07:10	72.3	↓-5.0
4/20 07:20	67.2	↓-5.1	最大潮位差
4/20 07:30	62.1	↓-5.1	最大潮位差
4/20 07:40	57.1	↓-5.0
4/20 07:50	52.2	↓-4.9
4/20 08:00	47.3	↓-4.9
4/20 08:10	42.6	↓-4.7
4/20 08:20	38.1	↓-4.5
4/20 08:30	33.8	↓-4.3
4/20 08:40	29.7	↓-4.1
4/20 08:50	25.8	↓-3.9
4/20 09:00	22.2	↓-3.6
4/20 09:10	18.9	↓-3.3
4/20 09:20	16.0	↓-2.9
4/20 09:30	13.3	↓-2.7
4/20 09:40	11.0	↓-2.3
4/20 09:50	9.1	↓-1.9
4/20 10:00	7.5	↓-1.6
4/20 10:10	6.3	↓-1.2
4/20 10:20	5.4	↓-0.9
4/20 10:30	5.0	↓-0.4	干潮
4/20 10:40	4.9	↓-0.1
4/20 10:50	5.3	↑0.4
4/20 11:00	6.0	↑0.7
4/20 11:10	7.1	↑1.1
4/20 11:20	8.6	↑1.5
4/20 11:30	10.5	↑1.9
4/20 11:40	12.8	↑2.3
4/20 11:50	15.5	↑2.7
4/20 12:00	18.5	↑3.0
4/20 12:10	21.8	↑3.3
4/20 12:20	25.5	↑3.7
4/20 12:30	29.4	↑3.9
4/20 12:40	33.6	↑4.2
4/20 12:50	38.0	↑4.4
4/20 13:00	42.6	↑4.6
4/20 13:10	47.3	↑4.7
4/20 13:20	52.2	↑4.9
4/20 13:30	57.2	↑5.0
4/20 13:40	62.2	↑5.0
4/20 13:50	67.2	↑5.0
4/20 14:00	72.2	↑5.0
4/20 14:10	77.2	↑5.0
4/20 14:20	82.0	↑4.8
4/20 14:30	86.7	↑4.7
4/20 14:40	91.3	↑4.6
4/20 14:50	95.7	↑4.4
4/20 15:00	99.9	↑4.2
4/20 15:10	103.8	↑3.9
4/20 15:20	107.5	↑3.7
4/20 15:30	111.0	↑3.5
4/20 15:40	114.1	↑3.1
4/20 15:50	117.0	↑2.9
4/20 16:00	119.5	↑2.5
4/20 16:10	121.7	↑2.2
4/20 16:20	123.6	↑1.9
4/20 16:30	125.1	↑1.5
4/20 16:40	126.3	↑1.2
4/20 16:50	127.1	↑0.8
4/20 17:00	127.6	↑0.5	満潮
4/20 17:10	127.7	↑0.1
4/20 17:20	127.4	↓-0.3
4/20 17:30	126.8	↓-0.6
4/20 17:40	125.8	↓-1.0
4/20 17:50	124.5	↓-1.3
4/20 18:00	122.8	↓-1.7
4/20 18:10	120.7	↓-2.1
4/20 18:20	118.4	↓-2.3
4/20 18:30	115.8	↓-2.6
4/20 18:40	112.9	↓-2.9
4/20 18:50	109.8	↓-3.1
4/20 19:00	106.5	↓-3.3
4/20 19:10	103.0	↓-3.5
4/20 19:20	99.3	↓-3.7
4/20 19:30	95.6	↓-3.7
4/20 19:40	91.8	↓-3.8
4/20 19:50	87.9	↓-3.9
4/20 20:00	84.0	↓-3.9
4/20 20:10	80.2	↓-3.8
4/20 20:20	76.5	↓-3.7
4/20 20:30	72.8	↓-3.7
4/20 20:40	69.2	↓-3.6
4/20 20:50	65.9	↓-3.3
4/20 21:00	62.7	↓-3.2
4/20 21:10	59.7	↓-3.0
4/20 21:20	56.9	↓-2.8
4/20 21:30	54.3	↓-2.6
4/20 21:40	52.1	↓-2.2
4/20 21:50	50.1	↓-2.0
4/20 22:00	48.4	↓-1.7
4/20 22:10	46.9	↓-1.5
4/20 22:20	45.8	↓-1.1
4/20 22:30	45.0	↓-0.8
4/20 22:40	44.6	↓-0.4	干潮
4/20 22:50	44.4	↓-0.2	干潮
4/20 23:00	44.6	↑0.2
4/20 23:10	45.1	↑0.5
4/20 23:20	46.0	↑0.9
4/20 23:30	47.2	↑1.2
4/20 23:40	48.7	↑1.5
4/20 23:50	50.5	↑1.8