20 (水)	06:34	00:13	18:22	12:29
	121cm	20cm	116cm	44cm
中潮 出 06:20 入 17:25 出 21:16 入 08:24

日立（茨城）2041年02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
2/20 00:00	19.8	↓-0.6
2/20 00:10	19.6	↓-0.2	干潮
2/20 00:20	19.7	↑0.1
2/20 00:30	20.1	↑0.4
2/20 00:40	20.9	↑0.8
2/20 00:50	22.0	↑1.1
2/20 01:00	23.4	↑1.4
2/20 01:10	25.1	↑1.7
2/20 01:20	27.2	↑2.1
2/20 01:30	29.5	↑2.3
2/20 01:40	32.2	↑2.7
2/20 01:50	35.1	↑2.9
2/20 02:00	38.2	↑3.1
2/20 02:10	41.6	↑3.4
2/20 02:20	45.2	↑3.6
2/20 02:30	49.0	↑3.8
2/20 02:40	52.9	↑3.9
2/20 02:50	57.0	↑4.1
2/20 03:00	61.1	↑4.1
2/20 03:10	65.3	↑4.2
2/20 03:20	69.6	↑4.3	最大潮位差
2/20 03:30	73.8	↑4.2
2/20 03:40	78.0	↑4.2
2/20 03:50	82.1	↑4.1
2/20 04:00	86.1	↑4.0
2/20 04:10	90.0	↑3.9
2/20 04:20	93.8	↑3.8
2/20 04:30	97.3	↑3.5
2/20 04:40	100.7	↑3.4
2/20 04:50	103.8	↑3.1
2/20 05:00	106.7	↑2.9
2/20 05:10	109.4	↑2.7
2/20 05:20	111.7	↑2.3
2/20 05:30	113.8	↑2.1
2/20 05:40	115.6	↑1.8
2/20 05:50	117.1	↑1.5
2/20 06:00	118.3	↑1.2
2/20 06:10	119.2	↑0.9
2/20 06:20	119.8	↑0.6
2/20 06:30	120.1	↑0.3	満潮
2/20 06:40	120.0	↓-0.1
2/20 06:50	119.7	↓-0.3
2/20 07:00	119.0	↓-0.7
2/20 07:10	118.0	↓-1.0
2/20 07:20	116.7	↓-1.3
2/20 07:30	115.2	↓-1.5
2/20 07:40	113.4	↓-1.8
2/20 07:50	111.3	↓-2.1
2/20 08:00	109.0	↓-2.3
2/20 08:10	106.4	↓-2.6
2/20 08:20	103.7	↓-2.7
2/20 08:30	100.7	↓-3.0
2/20 08:40	97.7	↓-3.0
2/20 08:50	94.5	↓-3.2
2/20 09:00	91.2	↓-3.3
2/20 09:10	87.8	↓-3.4
2/20 09:20	84.4	↓-3.4
2/20 09:30	81.0	↓-3.4
2/20 09:40	77.6	↓-3.4
2/20 09:50	74.2	↓-3.4
2/20 10:00	71.0	↓-3.2
2/20 10:10	67.8	↓-3.2
2/20 10:20	64.7	↓-3.1
2/20 10:30	61.8	↓-2.9
2/20 10:40	59.1	↓-2.7
2/20 10:50	56.5	↓-2.6
2/20 11:00	54.2	↓-2.3
2/20 11:10	52.0	↓-2.2
2/20 11:20	50.1	↓-1.9
2/20 11:30	48.5	↓-1.6
2/20 11:40	47.0	↓-1.5
2/20 11:50	45.9	↓-1.1
2/20 12:00	45.0	↓-0.9
2/20 12:10	44.4	↓-0.6
2/20 12:20	44.0	↓-0.4	干潮
2/20 12:30	43.9	↓-0.1
2/20 12:40	44.1	↑0.2
2/20 12:50	44.6	↑0.5
2/20 13:00	45.3	↑0.7
2/20 13:10	46.3	↑1.0
2/20 13:20	47.5	↑1.2
2/20 13:30	49.1	↑1.6
2/20 13:40	50.8	↑1.7
2/20 13:50	52.8	↑2.0
2/20 14:00	55.0	↑2.2
2/20 14:10	57.4	↑2.4
2/20 14:20	60.0	↑2.6
2/20 14:30	62.8	↑2.8
2/20 14:40	65.7	↑2.9
2/20 14:50	68.8	↑3.1
2/20 15:00	71.9	↑3.1
2/20 15:10	75.1	↑3.2
2/20 15:20	78.3	↑3.2
2/20 15:30	81.5	↑3.2
2/20 15:40	84.7	↑3.2
2/20 15:50	87.9	↑3.2
2/20 16:00	91.0	↑3.1
2/20 16:10	94.0	↑3.0
2/20 16:20	96.9	↑2.9
2/20 16:30	99.6	↑2.7
2/20 16:40	102.2	↑2.6
2/20 16:50	104.6	↑2.4
2/20 17:00	106.8	↑2.2
2/20 17:10	108.7	↑1.9
2/20 17:20	110.5	↑1.8
2/20 17:30	111.9	↑1.4
2/20 17:40	113.2	↑1.3
2/20 17:50	114.1	↑0.9
2/20 18:00	114.8	↑0.7
2/20 18:10	115.3	↑0.5
2/20 18:20	115.4	↑0.1	満潮
2/20 18:30	115.3	↓-0.1
2/20 18:40	114.9	↓-0.4
2/20 18:50	114.2	↓-0.7
2/20 19:00	113.3	↓-0.9
2/20 19:10	112.1	↓-1.2
2/20 19:20	110.6	↓-1.5
2/20 19:30	108.8	↓-1.8
2/20 19:40	106.9	↓-1.9
2/20 19:50	104.6	↓-2.3
2/20 20:00	102.2	↓-2.4
2/20 20:10	99.5	↓-2.7
2/20 20:20	96.7	↓-2.8
2/20 20:30	93.7	↓-3.0
2/20 20:40	90.5	↓-3.2
2/20 20:50	87.2	↓-3.3
2/20 21:00	83.8	↓-3.4
2/20 21:10	80.3	↓-3.5
2/20 21:20	76.8	↓-3.5
2/20 21:30	73.2	↓-3.6
2/20 21:40	69.6	↓-3.6
2/20 21:50	66.1	↓-3.5
2/20 22:00	62.6	↓-3.5
2/20 22:10	59.2	↓-3.4
2/20 22:20	55.9	↓-3.3
2/20 22:30	52.7	↓-3.2
2/20 22:40	49.7	↓-3.0
2/20 22:50	46.8	↓-2.9
2/20 23:00	44.2	↓-2.6
2/20 23:10	41.7	↓-2.5
2/20 23:20	39.5	↓-2.2
2/20 23:30	37.6	↓-1.9
2/20 23:40	35.8	↓-1.8
2/20 23:50	34.4	↓-1.4