31 (土)	05:35	10:26	15:36	22:57
	124cm	89cm	132cm	1cm
大潮 出 06:49 入 16:33 出 17:02 入 07:21

日立（茨城）2039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	17.8	↑3.1
12/31 00:10	21.1	↑3.3
12/31 00:20	24.7	↑3.6
12/31 00:30	28.5	↑3.8
12/31 00:40	32.5	↑4.0
12/31 00:50	36.6	↑4.1
12/31 01:00	40.9	↑4.3
12/31 01:10	45.3	↑4.4
12/31 01:20	49.8	↑4.5
12/31 01:30	54.3	↑4.5
12/31 01:40	58.8	↑4.5
12/31 01:50	63.4	↑4.6
12/31 02:00	67.8	↑4.4
12/31 02:10	72.3	↑4.5
12/31 02:20	76.6	↑4.3
12/31 02:30	80.8	↑4.2
12/31 02:40	84.9	↑4.1
12/31 02:50	88.9	↑4.0
12/31 03:00	92.7	↑3.8
12/31 03:10	96.3	↑3.6
12/31 03:20	99.8	↑3.5
12/31 03:30	103.0	↑3.2
12/31 03:40	106.1	↑3.1
12/31 03:50	108.9	↑2.8
12/31 04:00	111.5	↑2.6
12/31 04:10	113.8	↑2.3
12/31 04:20	115.9	↑2.1
12/31 04:30	117.8	↑1.9
12/31 04:40	119.4	↑1.6
12/31 04:50	120.7	↑1.3
12/31 05:00	121.7	↑1.0
12/31 05:10	122.5	↑0.8
12/31 05:20	123.0	↑0.5
12/31 05:30	123.2	↑0.2	満潮
12/31 05:40	123.2	0
12/31 05:50	122.9	↓-0.3
12/31 06:00	122.4	↓-0.5
12/31 06:10	121.7	↓-0.7
12/31 06:20	120.7	↓-1.0
12/31 06:30	119.5	↓-1.2
12/31 06:40	118.2	↓-1.3
12/31 06:50	116.7	↓-1.5
12/31 07:00	115.1	↓-1.6
12/31 07:10	113.4	↓-1.7
12/31 07:20	111.6	↓-1.8
12/31 07:30	109.8	↓-1.8
12/31 07:40	107.9	↓-1.9
12/31 07:50	106.0	↓-1.9
12/31 08:00	104.1	↓-1.9
12/31 08:10	102.3	↓-1.8
12/31 08:20	100.5	↓-1.8
12/31 08:30	98.8	↓-1.7
12/31 08:40	97.2	↓-1.6
12/31 08:50	95.7	↓-1.5
12/31 09:00	94.3	↓-1.4
12/31 09:10	93.0	↓-1.3
12/31 09:20	91.9	↓-1.1
12/31 09:30	90.9	↓-1.0
12/31 09:40	90.1	↓-0.8
12/31 09:50	89.4	↓-0.7
12/31 10:00	88.8	↓-0.6
12/31 10:10	88.5	↓-0.3
12/31 10:20	88.3	↓-0.2	干潮
12/31 10:30	88.3	0
12/31 10:40	88.5	↑0.2
12/31 10:50	88.9	↑0.4
12/31 11:00	89.4	↑0.5
12/31 11:10	90.2	↑0.8
12/31 11:20	91.1	↑0.9
12/31 11:30	92.2	↑1.1
12/31 11:40	93.5	↑1.3
12/31 11:50	95.0	↑1.5
12/31 12:00	96.6	↑1.6
12/31 12:10	98.4	↑1.8
12/31 12:20	100.3	↑1.9
12/31 12:30	102.3	↑2.0
12/31 12:40	104.4	↑2.1
12/31 12:50	106.6	↑2.2
12/31 13:00	108.8	↑2.2
12/31 13:10	111.1	↑2.3
12/31 13:20	113.3	↑2.2
12/31 13:30	115.5	↑2.2
12/31 13:40	117.7	↑2.2
12/31 13:50	119.8	↑2.1
12/31 14:00	121.8	↑2.0
12/31 14:10	123.6	↑1.8
12/31 14:20	125.3	↑1.7
12/31 14:30	126.9	↑1.6
12/31 14:40	128.2	↑1.3
12/31 14:50	129.4	↑1.2
12/31 15:00	130.3	↑0.9
12/31 15:10	131.1	↑0.8
12/31 15:20	131.6	↑0.5
12/31 15:30	131.8	↑0.2	満潮
12/31 15:40	131.8	0
12/31 15:50	131.5	↓-0.3
12/31 16:00	131.0	↓-0.5
12/31 16:10	130.2	↓-0.8
12/31 16:20	129.2	↓-1.0
12/31 16:30	127.8	↓-1.4
12/31 16:40	126.2	↓-1.6
12/31 16:50	124.3	↓-1.9
12/31 17:00	122.2	↓-2.1
12/31 17:10	119.7	↓-2.5
12/31 17:20	117.0	↓-2.7
12/31 17:30	114.0	↓-3.0
12/31 17:40	110.8	↓-3.2
12/31 17:50	107.3	↓-3.5
12/31 18:00	103.6	↓-3.7
12/31 18:10	99.6	↓-4.0
12/31 18:20	95.4	↓-4.2
12/31 18:30	91.1	↓-4.3
12/31 18:40	86.6	↓-4.5
12/31 18:50	82.0	↓-4.6
12/31 19:00	77.2	↓-4.8
12/31 19:10	72.4	↓-4.8
12/31 19:20	67.5	↓-4.9	最大潮位差
12/31 19:30	62.7	↓-4.8
12/31 19:40	57.8	↓-4.9	最大潮位差
12/31 19:50	53.0	↓-4.8
12/31 20:00	48.2	↓-4.8
12/31 20:10	43.5	↓-4.7
12/31 20:20	39.0	↓-4.5
12/31 20:30	34.7	↓-4.3
12/31 20:40	30.5	↓-4.2
12/31 20:50	26.5	↓-4.0
12/31 21:00	22.8	↓-3.7
12/31 21:10	19.3	↓-3.5
12/31 21:20	16.0	↓-3.3
12/31 21:30	13.1	↓-2.9
12/31 21:40	10.4	↓-2.7
12/31 21:50	8.0	↓-2.4
12/31 22:00	6.0	↓-2.0
12/31 22:10	4.2	↓-1.8
12/31 22:20	2.8	↓-1.4
12/31 22:30	1.7	↓-1.1
12/31 22:40	1.0	↓-0.7
12/31 22:50	0.6	↓-0.4	干潮
12/31 23:00	0.5	↓-0.1
12/31 23:10	0.8	↑0.3
12/31 23:20	1.5	↑0.7
12/31 23:30	2.5	↑1.0
12/31 23:40	3.9	↑1.4
12/31 23:50	5.6	↑1.7