7 (金)	04:54	10:13	15:44	22:34
	117cm	65cm	126cm	4cm
大潮 出 06:35 入 17:11 出 17:05 入 05:56

日立（茨城）2031年02月7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
2/7 00:00	26.6	↑3.6
2/7 00:10	30.3	↑3.7
2/7 00:20	34.2	↑3.9
2/7 00:30	38.3	↑4.1
2/7 00:40	42.5	↑4.2
2/7 00:50	46.7	↑4.2
2/7 01:00	51.1	↑4.4
2/7 01:10	55.4	↑4.3
2/7 01:20	59.8	↑4.4
2/7 01:30	64.1	↑4.3
2/7 01:40	68.4	↑4.3
2/7 01:50	72.7	↑4.3
2/7 02:00	76.8	↑4.1
2/7 02:10	80.8	↑4.0
2/7 02:20	84.7	↑3.9
2/7 02:30	88.4	↑3.7
2/7 02:40	91.9	↑3.5
2/7 02:50	95.3	↑3.4
2/7 03:00	98.5	↑3.2
2/7 03:10	101.4	↑2.9
2/7 03:20	104.1	↑2.7
2/7 03:30	106.6	↑2.5
2/7 03:40	108.9	↑2.3
2/7 03:50	110.8	↑1.9
2/7 04:00	112.5	↑1.7
2/7 04:10	114.0	↑1.5
2/7 04:20	115.1	↑1.1
2/7 04:30	116.0	↑0.9
2/7 04:40	116.5	↑0.5
2/7 04:50	116.7	↑0.2	満潮
2/7 05:00	116.7	0
2/7 05:10	116.4	↓-0.3
2/7 05:20	115.7	↓-0.7
2/7 05:30	114.8	↓-0.9
2/7 05:40	113.7	↓-1.1
2/7 05:50	112.2	↓-1.5
2/7 06:00	110.6	↓-1.6
2/7 06:10	108.8	↓-1.8
2/7 06:20	106.7	↓-2.1
2/7 06:30	104.6	↓-2.1
2/7 06:40	102.3	↓-2.3
2/7 06:50	99.9	↓-2.4
2/7 07:00	97.4	↓-2.5
2/7 07:10	94.9	↓-2.5
2/7 07:20	92.3	↓-2.6
2/7 07:30	89.8	↓-2.5
2/7 07:40	87.3	↓-2.5
2/7 07:50	84.8	↓-2.5
2/7 08:00	82.4	↓-2.4
2/7 08:10	80.1	↓-2.3
2/7 08:20	77.9	↓-2.2
2/7 08:30	75.9	↓-2.0
2/7 08:40	73.9	↓-2.0
2/7 08:50	72.2	↓-1.7
2/7 09:00	70.6	↓-1.6
2/7 09:10	69.1	↓-1.5
2/7 09:20	67.9	↓-1.2
2/7 09:30	66.8	↓-1.1
2/7 09:40	66.0	↓-0.8
2/7 09:50	65.4	↓-0.6
2/7 10:00	65.0	↓-0.4
2/7 10:10	64.8	↓-0.2	干潮
2/7 10:20	64.8	0
2/7 10:30	65.2	↑0.4
2/7 10:40	65.7	↑0.5
2/7 10:50	66.5	↑0.8
2/7 11:00	67.6	↑1.1
2/7 11:10	68.8	↑1.2
2/7 11:20	70.4	↑1.6
2/7 11:30	72.1	↑1.7
2/7 11:40	74.1	↑2.0
2/7 11:50	76.3	↑2.2
2/7 12:00	78.6	↑2.3
2/7 12:10	81.1	↑2.5
2/7 12:20	83.7	↑2.6
2/7 12:30	86.5	↑2.8
2/7 12:40	89.3	↑2.8
2/7 12:50	92.2	↑2.9
2/7 13:00	95.1	↑2.9
2/7 13:10	98.0	↑2.9
2/7 13:20	100.9	↑2.9
2/7 13:30	103.7	↑2.8
2/7 13:40	106.4	↑2.7
2/7 13:50	109.0	↑2.6
2/7 14:00	111.5	↑2.5
2/7 14:10	113.8	↑2.3
2/7 14:20	116.0	↑2.2
2/7 14:30	117.9	↑1.9
2/7 14:40	119.7	↑1.8
2/7 14:50	121.2	↑1.5
2/7 15:00	122.5	↑1.3
2/7 15:10	123.5	↑1.0
2/7 15:20	124.3	↑0.8
2/7 15:30	124.8	↑0.5
2/7 15:40	125.0	↑0.2	満潮
2/7 15:50	124.9	↓-0.1
2/7 16:00	124.6	↓-0.3
2/7 16:10	123.9	↓-0.7
2/7 16:20	122.9	↓-1.0
2/7 16:30	121.7	↓-1.2
2/7 16:40	120.1	↓-1.6
2/7 16:50	118.1	↓-2.0
2/7 17:00	115.9	↓-2.2
2/7 17:10	113.4	↓-2.5
2/7 17:20	110.5	↓-2.9
2/7 17:30	107.4	↓-3.1
2/7 17:40	104.0	↓-3.4
2/7 17:50	100.3	↓-3.7
2/7 18:00	96.4	↓-3.9
2/7 18:10	92.3	↓-4.1
2/7 18:20	88.0	↓-4.3
2/7 18:30	83.5	↓-4.5
2/7 18:40	78.9	↓-4.6
2/7 18:50	74.2	↓-4.7
2/7 19:00	69.4	↓-4.8	最大潮位差
2/7 19:10	64.6	↓-4.8	最大潮位差
2/7 19:20	59.8	↓-4.8	最大潮位差
2/7 19:30	55.0	↓-4.8	最大潮位差
2/7 19:40	50.3	↓-4.7
2/7 19:50	45.7	↓-4.6
2/7 20:00	41.2	↓-4.5
2/7 20:10	36.8	↓-4.4
2/7 20:20	32.7	↓-4.1
2/7 20:30	28.7	↓-4.0
2/7 20:40	25.0	↓-3.7
2/7 20:50	21.5	↓-3.5
2/7 21:00	18.2	↓-3.3
2/7 21:10	15.3	↓-2.9
2/7 21:20	12.6	↓-2.7
2/7 21:30	10.3	↓-2.3
2/7 21:40	8.2	↓-2.1
2/7 21:50	6.5	↓-1.7
2/7 22:00	5.1	↓-1.4
2/7 22:10	4.1	↓-1.0
2/7 22:20	3.4	↓-0.7
2/7 22:30	3.1	↓-0.3	干潮
2/7 22:40	3.2	↑0.1
2/7 22:50	3.6	↑0.4
2/7 23:00	4.4	↑0.8
2/7 23:10	5.6	↑1.2
2/7 23:20	7.2	↑1.6
2/7 23:30	9.1	↑1.9
2/7 23:40	11.3	↑2.2
2/7 23:50	13.9	↑2.6