31 (火)	08:31	01:48	20:34	14:59
	123cm	44cm	98cm	58cm
小潮 出 06:49 入 16:34 出 10:51 入 23:53

日立（茨城）2030年12月31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
12/31 00:00	55.8	↓-2.2
12/31 00:10	53.8	↓-2.0
12/31 00:20	52.0	↓-1.8
12/31 00:30	50.3	↓-1.7
12/31 00:40	48.8	↓-1.5
12/31 00:50	47.5	↓-1.3
12/31 01:00	46.4	↓-1.1
12/31 01:10	45.5	↓-0.9
12/31 01:20	44.8	↓-0.7
12/31 01:30	44.3	↓-0.5
12/31 01:40	44.0	↓-0.3	干潮
12/31 01:50	44.0	0
12/31 02:00	44.2	↑0.2
12/31 02:10	44.6	↑0.4
12/31 02:20	45.3	↑0.7
12/31 02:30	46.2	↑0.9
12/31 02:40	47.3	↑1.1
12/31 02:50	48.6	↑1.3
12/31 03:00	50.2	↑1.6
12/31 03:10	52.0	↑1.8
12/31 03:20	54.0	↑2.0
12/31 03:30	56.2	↑2.2
12/31 03:40	58.5	↑2.3
12/31 03:50	61.1	↑2.6
12/31 04:00	63.7	↑2.6
12/31 04:10	66.5	↑2.8
12/31 04:20	69.4	↑2.9
12/31 04:30	72.3	↑2.9
12/31 04:40	75.4	↑3.1	最大潮位差
12/31 04:50	78.4	↑3.0
12/31 05:00	81.5	↑3.1	最大潮位差
12/31 05:10	84.6	↑3.1	最大潮位差
12/31 05:20	87.7	↑3.1	最大潮位差
12/31 05:30	90.7	↑3.0
12/31 05:40	93.7	↑3.0
12/31 05:50	96.6	↑2.9
12/31 06:00	99.5	↑2.9
12/31 06:10	102.2	↑2.7
12/31 06:20	104.8	↑2.6
12/31 06:30	107.3	↑2.5
12/31 06:40	109.6	↑2.3
12/31 06:50	111.8	↑2.2
12/31 07:00	113.8	↑2.0
12/31 07:10	115.6	↑1.8
12/31 07:20	117.2	↑1.6
12/31 07:30	118.7	↑1.5
12/31 07:40	119.9	↑1.2
12/31 07:50	120.9	↑1.0
12/31 08:00	121.7	↑0.8
12/31 08:10	122.3	↑0.6
12/31 08:20	122.7	↑0.4
12/31 08:30	122.8	↑0.1	満潮
12/31 08:40	122.7	↓-0.1
12/31 08:50	122.3	↓-0.4
12/31 09:00	121.8	↓-0.5
12/31 09:10	121.0	↓-0.8
12/31 09:20	120.0	↓-1.0
12/31 09:30	118.8	↓-1.2
12/31 09:40	117.3	↓-1.5
12/31 09:50	115.7	↓-1.6
12/31 10:00	114.0	↓-1.7
12/31 10:10	112.0	↓-2.0
12/31 10:20	110.0	↓-2.0
12/31 10:30	107.7	↓-2.3
12/31 10:40	105.4	↓-2.3
12/31 10:50	103.0	↓-2.4
12/31 11:00	100.5	↓-2.5
12/31 11:10	98.0	↓-2.5
12/31 11:20	95.4	↓-2.6
12/31 11:30	92.8	↓-2.6
12/31 11:40	90.2	↓-2.6
12/31 11:50	87.6	↓-2.6
12/31 12:00	85.0	↓-2.6
12/31 12:10	82.4	↓-2.6
12/31 12:20	79.9	↓-2.5
12/31 12:30	77.5	↓-2.4
12/31 12:40	75.2	↓-2.3
12/31 12:50	72.9	↓-2.3
12/31 13:00	70.8	↓-2.1
12/31 13:10	68.8	↓-2.0
12/31 13:20	66.9	↓-1.9
12/31 13:30	65.1	↓-1.8
12/31 13:40	63.5	↓-1.6
12/31 13:50	62.1	↓-1.4
12/31 14:00	60.9	↓-1.2
12/31 14:10	59.8	↓-1.1
12/31 14:20	59.0	↓-0.8
12/31 14:30	58.3	↓-0.7
12/31 14:40	57.8	↓-0.5
12/31 14:50	57.6	↓-0.2	干潮
12/31 15:00	57.5	↓-0.1
12/31 15:10	57.7	↑0.2
12/31 15:20	58.0	↑0.3
12/31 15:30	58.5	↑0.5
12/31 15:40	59.3	↑0.8
12/31 15:50	60.2	↑0.9
12/31 16:00	61.2	↑1.0
12/31 16:10	62.5	↑1.3
12/31 16:20	63.8	↑1.3
12/31 16:30	65.3	↑1.5
12/31 16:40	66.9	↑1.6
12/31 16:50	68.6	↑1.7
12/31 17:00	70.3	↑1.7
12/31 17:10	72.1	↑1.8
12/31 17:20	73.9	↑1.8
12/31 17:30	75.8	↑1.9
12/31 17:40	77.7	↑1.9
12/31 17:50	79.5	↑1.8
12/31 18:00	81.4	↑1.9
12/31 18:10	83.1	↑1.7
12/31 18:20	84.9	↑1.8
12/31 18:30	86.5	↑1.6
12/31 18:40	88.1	↑1.6
12/31 18:50	89.6	↑1.5
12/31 19:00	91.0	↑1.4
12/31 19:10	92.3	↑1.3
12/31 19:20	93.5	↑1.2
12/31 19:30	94.5	↑1.0
12/31 19:40	95.4	↑0.9
12/31 19:50	96.1	↑0.7
12/31 20:00	96.7	↑0.6
12/31 20:10	97.2	↑0.5
12/31 20:20	97.5	↑0.3
12/31 20:30	97.6	↑0.1	満潮
12/31 20:40	97.6	0
12/31 20:50	97.4	↓-0.2
12/31 21:00	97.0	↓-0.4
12/31 21:10	96.5	↓-0.5
12/31 21:20	95.8	↓-0.7
12/31 21:30	95.0	↓-0.8
12/31 21:40	94.1	↓-0.9
12/31 21:50	93.0	↓-1.1
12/31 22:00	91.8	↓-1.2
12/31 22:10	90.5	↓-1.3
12/31 22:20	89.1	↓-1.4
12/31 22:30	87.6	↓-1.5
12/31 22:40	86.0	↓-1.6
12/31 22:50	84.4	↓-1.6
12/31 23:00	82.7	↓-1.7
12/31 23:10	81.0	↓-1.7
12/31 23:20	79.3	↓-1.7
12/31 23:30	77.6	↓-1.7
12/31 23:40	75.9	↓-1.7
12/31 23:50	74.2	↓-1.7