1 (月)	05:54	10:58	16:20	23:29
	130cm	86cm	139cm	11cm
大潮 出 06:30 入 16:24 出 18:26 入 08:04

日立（茨城）2031年12月1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
12/1 00:00	14.9	↑2.2
12/1 00:10	17.5	↑2.6
12/1 00:20	20.3	↑2.8
12/1 00:30	23.5	↑3.2
12/1 00:40	27.0	↑3.5
12/1 00:50	30.7	↑3.7
12/1 01:00	34.6	↑3.9
12/1 01:10	38.8	↑4.2
12/1 01:20	43.1	↑4.3
12/1 01:30	47.6	↑4.5
12/1 01:40	52.2	↑4.6
12/1 01:50	56.8	↑4.6
12/1 02:00	61.5	↑4.7
12/1 02:10	66.2	↑4.7
12/1 02:20	70.9	↑4.7
12/1 02:30	75.6	↑4.7
12/1 02:40	80.1	↑4.5
12/1 02:50	84.6	↑4.5
12/1 03:00	89.0	↑4.4
12/1 03:10	93.2	↑4.2
12/1 03:20	97.2	↑4.0
12/1 03:30	101.1	↑3.9
12/1 03:40	104.7	↑3.6
12/1 03:50	108.2	↑3.5
12/1 04:00	111.4	↑3.2
12/1 04:10	114.4	↑3.0
12/1 04:20	117.1	↑2.7
12/1 04:30	119.6	↑2.5
12/1 04:40	121.8	↑2.2
12/1 04:50	123.8	↑2.0
12/1 05:00	125.5	↑1.7
12/1 05:10	126.8	↑1.3
12/1 05:20	127.9	↑1.1
12/1 05:30	128.8	↑0.9
12/1 05:40	129.3	↑0.5
12/1 05:50	129.5	↑0.2	満潮
12/1 06:00	129.4	↓-0.1
12/1 06:10	129.1	↓-0.3
12/1 06:20	128.5	↓-0.6
12/1 06:30	127.6	↓-0.9
12/1 06:40	126.5	↓-1.1
12/1 06:50	125.2	↓-1.3
12/1 07:00	123.6	↓-1.6
12/1 07:10	121.9	↓-1.7
12/1 07:20	120.0	↓-1.9
12/1 07:30	118.0	↓-2.0
12/1 07:40	115.8	↓-2.2
12/1 07:50	113.6	↓-2.2
12/1 08:00	111.4	↓-2.2
12/1 08:10	109.1	↓-2.3
12/1 08:20	106.8	↓-2.3
12/1 08:30	104.5	↓-2.3
12/1 08:40	102.3	↓-2.2
12/1 08:50	100.2	↓-2.1
12/1 09:00	98.1	↓-2.1
12/1 09:10	96.1	↓-2.0
12/1 09:20	94.3	↓-1.8
12/1 09:30	92.6	↓-1.7
12/1 09:40	91.1	↓-1.5
12/1 09:50	89.7	↓-1.4
12/1 10:00	88.5	↓-1.2
12/1 10:10	87.5	↓-1.0
12/1 10:20	86.6	↓-0.9
12/1 10:30	86.0	↓-0.6
12/1 10:40	85.5	↓-0.5
12/1 10:50	85.3	↓-0.2	干潮
12/1 11:00	85.2	↓-0.1
12/1 11:10	85.4	↑0.2
12/1 11:20	85.8	↑0.4
12/1 11:30	86.4	↑0.6
12/1 11:40	87.2	↑0.8
12/1 11:50	88.2	↑1.0
12/1 12:00	89.5	↑1.3
12/1 12:10	90.9	↑1.4
12/1 12:20	92.6	↑1.7
12/1 12:30	94.4	↑1.8
12/1 12:40	96.4	↑2.0
12/1 12:50	98.6	↑2.2
12/1 13:00	100.9	↑2.3
12/1 13:10	103.3	↑2.4
12/1 13:20	105.8	↑2.5
12/1 13:30	108.4	↑2.6
12/1 13:40	111.0	↑2.6
12/1 13:50	113.7	↑2.7
12/1 14:00	116.3	↑2.6
12/1 14:10	118.9	↑2.6
12/1 14:20	121.4	↑2.5
12/1 14:30	123.8	↑2.4
12/1 14:40	126.1	↑2.3
12/1 14:50	128.3	↑2.2
12/1 15:00	130.3	↑2.0
12/1 15:10	132.1	↑1.8
12/1 15:20	133.7	↑1.6
12/1 15:30	135.0	↑1.3
12/1 15:40	136.2	↑1.2
12/1 15:50	137.1	↑0.9
12/1 16:00	137.7	↑0.6
12/1 16:10	138.1	↑0.4	満潮
12/1 16:20	138.2	↑0.1	満潮
12/1 16:30	138.0	↓-0.2
12/1 16:40	137.6	↓-0.4
12/1 16:50	136.8	↓-0.8
12/1 17:00	135.8	↓-1.0
12/1 17:10	134.5	↓-1.3
12/1 17:20	132.9	↓-1.6
12/1 17:30	131.0	↓-1.9
12/1 17:40	128.8	↓-2.2
12/1 17:50	126.3	↓-2.5
12/1 18:00	123.6	↓-2.7
12/1 18:10	120.6	↓-3.0
12/1 18:20	117.3	↓-3.3
12/1 18:30	113.7	↓-3.6
12/1 18:40	109.9	↓-3.8
12/1 18:50	105.9	↓-4.0
12/1 19:00	101.7	↓-4.2
12/1 19:10	97.4	↓-4.3
12/1 19:20	92.8	↓-4.6
12/1 19:30	88.2	↓-4.6
12/1 19:40	83.5	↓-4.7
12/1 19:50	78.6	↓-4.9	最大潮位差
12/1 20:00	73.8	↓-4.8
12/1 20:10	69.0	↓-4.8
12/1 20:20	64.2	↓-4.8
12/1 20:30	59.4	↓-4.8
12/1 20:40	54.8	↓-4.6
12/1 20:50	50.2	↓-4.6
12/1 21:00	45.9	↓-4.3
12/1 21:10	41.7	↓-4.2
12/1 21:20	37.7	↓-4.0
12/1 21:30	33.9	↓-3.8
12/1 21:40	30.3	↓-3.6
12/1 21:50	27.0	↓-3.3
12/1 22:00	24.0	↓-3.0
12/1 22:10	21.3	↓-2.7
12/1 22:20	18.8	↓-2.5
12/1 22:30	16.7	↓-2.1
12/1 22:40	14.9	↓-1.8
12/1 22:50	13.4	↓-1.5
12/1 23:00	12.3	↓-1.1
12/1 23:10	11.5	↓-0.8
12/1 23:20	11.0	↓-0.5	干潮
12/1 23:30	10.9	↓-0.1
12/1 23:40	11.1	↑0.2
12/1 23:50	11.7	↑0.6