31 (月)	03:14	07:33	12:54	20:38
	114cm	92cm	128cm	9cm
中潮 出 06:49 入 16:34 出 03:50 入 13:57

日立（茨城）2040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	80.7	↑3.0
12/31 00:10	83.7	↑3.0
12/31 00:20	86.6	↑2.9
12/31 00:30	89.4	↑2.8
12/31 00:40	92.1	↑2.7
12/31 00:50	94.6	↑2.5
12/31 01:00	97.0	↑2.4
12/31 01:10	99.2	↑2.2
12/31 01:20	101.3	↑2.1
12/31 01:30	103.3	↑2.0
12/31 01:40	105.0	↑1.7
12/31 01:50	106.7	↑1.7
12/31 02:00	108.1	↑1.4
12/31 02:10	109.3	↑1.2
12/31 02:20	110.4	↑1.1
12/31 02:30	111.3	↑0.9
12/31 02:40	112.0	↑0.7
12/31 02:50	112.6	↑0.6
12/31 03:00	112.9	↑0.3
12/31 03:10	113.1	↑0.2	満潮
12/31 03:20	113.0	↓-0.1
12/31 03:30	112.8	↓-0.2
12/31 03:40	112.4	↓-0.4
12/31 03:50	111.9	↓-0.5
12/31 04:00	111.2	↓-0.7
12/31 04:10	110.4	↓-0.8
12/31 04:20	109.4	↓-1.0
12/31 04:30	108.4	↓-1.0
12/31 04:40	107.2	↓-1.2
12/31 04:50	106.0	↓-1.2
12/31 05:00	104.7	↓-1.3
12/31 05:10	103.4	↓-1.3
12/31 05:20	102.1	↓-1.3
12/31 05:30	100.9	↓-1.2
12/31 05:40	99.6	↓-1.3
12/31 05:50	98.4	↓-1.2
12/31 06:00	97.2	↓-1.2
12/31 06:10	96.2	↓-1.0
12/31 06:20	95.2	↓-1.0
12/31 06:30	94.3	↓-0.9
12/31 06:40	93.6	↓-0.7
12/31 06:50	93.0	↓-0.6
12/31 07:00	92.5	↓-0.5
12/31 07:10	92.1	↓-0.4
12/31 07:20	91.9	↓-0.2
12/31 07:30	91.8	↓-0.1	干潮
12/31 07:40	91.8	0
12/31 07:50	92.0	↑0.2
12/31 08:00	92.3	↑0.3
12/31 08:10	92.7	↑0.4
12/31 08:20	93.3	↑0.6
12/31 08:30	94.0	↑0.7
12/31 08:40	94.9	↑0.9
12/31 08:50	95.8	↑0.9
12/31 09:00	96.9	↑1.1
12/31 09:10	98.1	↑1.2
12/31 09:20	99.5	↑1.4
12/31 09:30	100.9	↑1.4
12/31 09:40	102.4	↑1.5
12/31 09:50	104.0	↑1.6
12/31 10:00	105.7	↑1.7
12/31 10:10	107.4	↑1.7
12/31 10:20	109.1	↑1.7
12/31 10:30	110.9	↑1.8
12/31 10:40	112.7	↑1.8
12/31 10:50	114.5	↑1.8
12/31 11:00	116.2	↑1.7
12/31 11:10	117.9	↑1.7
12/31 11:20	119.5	↑1.6
12/31 11:30	121.0	↑1.5
12/31 11:40	122.4	↑1.4
12/31 11:50	123.7	↑1.3
12/31 12:00	124.8	↑1.1
12/31 12:10	125.7	↑0.9
12/31 12:20	126.5	↑0.8
12/31 12:30	127.0	↑0.5
12/31 12:40	127.4	↑0.4
12/31 12:50	127.6	↑0.2	満潮
12/31 13:00	127.5	↓-0.1
12/31 13:10	127.2	↓-0.3
12/31 13:20	126.8	↓-0.4
12/31 13:30	126.1	↓-0.7
12/31 13:40	125.1	↓-1.0
12/31 13:50	124.0	↓-1.1
12/31 14:00	122.6	↓-1.4
12/31 14:10	121.0	↓-1.6
12/31 14:20	119.2	↓-1.8
12/31 14:30	117.2	↓-2.0
12/31 14:40	115.0	↓-2.2
12/31 14:50	112.5	↓-2.5
12/31 15:00	109.9	↓-2.6
12/31 15:10	107.1	↓-2.8
12/31 15:20	104.1	↓-3.0
12/31 15:30	100.9	↓-3.2
12/31 15:40	97.5	↓-3.4
12/31 15:50	93.9	↓-3.6
12/31 16:00	90.3	↓-3.6
12/31 16:10	86.4	↓-3.9
12/31 16:20	82.5	↓-3.9
12/31 16:30	78.5	↓-4.0
12/31 16:40	74.3	↓-4.2	最大潮位差
12/31 16:50	70.2	↓-4.1
12/31 17:00	66.0	↓-4.2	最大潮位差
12/31 17:10	61.8	↓-4.2	最大潮位差
12/31 17:20	57.6	↓-4.2	最大潮位差
12/31 17:30	53.4	↓-4.2	最大潮位差
12/31 17:40	49.3	↓-4.1
12/31 17:50	45.3	↓-4.0
12/31 18:00	41.5	↓-3.8
12/31 18:10	37.8	↓-3.7
12/31 18:20	34.2	↓-3.6
12/31 18:30	30.8	↓-3.4
12/31 18:40	27.6	↓-3.2
12/31 18:50	24.6	↓-3.0
12/31 19:00	21.9	↓-2.7
12/31 19:10	19.4	↓-2.5
12/31 19:20	17.1	↓-2.3
12/31 19:30	15.1	↓-2.0
12/31 19:40	13.4	↓-1.7
12/31 19:50	11.9	↓-1.5
12/31 20:00	10.7	↓-1.2
12/31 20:10	9.8	↓-0.9
12/31 20:20	9.2	↓-0.6
12/31 20:30	8.8	↓-0.4	干潮
12/31 20:40	8.8	0
12/31 20:50	9.0	↑0.2
12/31 21:00	9.5	↑0.5
12/31 21:10	10.3	↑0.8
12/31 21:20	11.4	↑1.1
12/31 21:30	12.8	↑1.4
12/31 21:40	14.5	↑1.7
12/31 21:50	16.4	↑1.9
12/31 22:00	18.6	↑2.2
12/31 22:10	21.1	↑2.5
12/31 22:20	23.8	↑2.7
12/31 22:30	26.8	↑3.0
12/31 22:40	29.9	↑3.1
12/31 22:50	33.3	↑3.4
12/31 23:00	36.8	↑3.5
12/31 23:10	40.5	↑3.7
12/31 23:20	44.3	↑3.8
12/31 23:30	48.2	↑3.9
12/31 23:40	52.2	↑4.0
12/31 23:50	56.2	↑4.0