31 (日)	05:01	09:44	14:47	22:17
	125cm	94cm	134cm	-6cm
大潮 出 06:49 入 16:34 出 16:05 入 06:14

日立（茨城）2028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	32.0	↑4.1
12/31 00:10	36.1	↑4.1
12/31 00:20	40.5	↑4.4
12/31 00:30	44.9	↑4.4
12/31 00:40	49.3	↑4.4
12/31 00:50	53.9	↑4.6
12/31 01:00	58.4	↑4.5
12/31 01:10	62.9	↑4.5
12/31 01:20	67.4	↑4.5
12/31 01:30	71.8	↑4.4
12/31 01:40	76.1	↑4.3
12/31 01:50	80.4	↑4.3
12/31 02:00	84.5	↑4.1
12/31 02:10	88.4	↑3.9
12/31 02:20	92.3	↑3.9
12/31 02:30	95.9	↑3.6
12/31 02:40	99.4	↑3.5
12/31 02:50	102.7	↑3.3
12/31 03:00	105.8	↑3.1
12/31 03:10	108.6	↑2.8
12/31 03:20	111.3	↑2.7
12/31 03:30	113.7	↑2.4
12/31 03:40	115.9	↑2.2
12/31 03:50	117.8	↑1.9
12/31 04:00	119.5	↑1.7
12/31 04:10	121.0	↑1.5
12/31 04:20	122.2	↑1.2
12/31 04:30	123.1	↑0.9
12/31 04:40	123.7	↑0.6
12/31 04:50	124.1	↑0.4
12/31 05:00	124.2	↑0.1	満潮
12/31 05:10	124.1	↓-0.1
12/31 05:20	123.8	↓-0.3
12/31 05:30	123.2	↓-0.6
12/31 05:40	122.4	↓-0.8
12/31 05:50	121.5	↓-0.9
12/31 06:00	120.3	↓-1.2
12/31 06:10	119.0	↓-1.3
12/31 06:20	117.6	↓-1.4
12/31 06:30	116.1	↓-1.5
12/31 06:40	114.5	↓-1.6
12/31 06:50	112.8	↓-1.7
12/31 07:00	111.2	↓-1.6
12/31 07:10	109.5	↓-1.7
12/31 07:20	107.8	↓-1.7
12/31 07:30	106.1	↓-1.7
12/31 07:40	104.5	↓-1.6
12/31 07:50	103.0	↓-1.5
12/31 08:00	101.5	↓-1.5
12/31 08:10	100.2	↓-1.3
12/31 08:20	98.9	↓-1.3
12/31 08:30	97.8	↓-1.1
12/31 08:40	96.8	↓-1.0
12/31 08:50	95.9	↓-0.9
12/31 09:00	95.2	↓-0.7
12/31 09:10	94.6	↓-0.6
12/31 09:20	94.1	↓-0.5
12/31 09:30	93.8	↓-0.3
12/31 09:40	93.7	↓-0.1	干潮
12/31 09:50	93.8	↑0.1
12/31 10:00	94.0	↑0.2
12/31 10:10	94.3	↑0.3
12/31 10:20	94.9	↑0.6
12/31 10:30	95.6	↑0.7
12/31 10:40	96.5	↑0.9
12/31 10:50	97.6	↑1.1
12/31 11:00	98.9	↑1.3
12/31 11:10	100.3	↑1.4
12/31 11:20	101.8	↑1.5
12/31 11:30	103.5	↑1.7
12/31 11:40	105.3	↑1.8
12/31 11:50	107.2	↑1.9
12/31 12:00	109.2	↑2.0
12/31 12:10	111.3	↑2.1
12/31 12:20	113.3	↑2.0
12/31 12:30	115.5	↑2.2
12/31 12:40	117.5	↑2.0
12/31 12:50	119.6	↑2.1
12/31 13:00	121.6	↑2.0
12/31 13:10	123.5	↑1.9
12/31 13:20	125.3	↑1.8
12/31 13:30	127.0	↑1.7
12/31 13:40	128.5	↑1.5
12/31 13:50	129.9	↑1.4
12/31 14:00	131.0	↑1.1
12/31 14:10	132.0	↑1.0
12/31 14:20	132.7	↑0.7
12/31 14:30	133.3	↑0.6
12/31 14:40	133.5	↑0.2	満潮
12/31 14:50	133.6	↑0.1
12/31 15:00	133.4	↓-0.2
12/31 15:10	132.9	↓-0.5
12/31 15:20	132.1	↓-0.8
12/31 15:30	131.1	↓-1.0
12/31 15:40	129.8	↓-1.3
12/31 15:50	128.3	↓-1.5
12/31 16:00	126.4	↓-1.9
12/31 16:10	124.3	↓-2.1
12/31 16:20	121.9	↓-2.4
12/31 16:30	119.3	↓-2.6
12/31 16:40	116.3	↓-3.0
12/31 16:50	113.1	↓-3.2
12/31 17:00	109.6	↓-3.5
12/31 17:10	105.9	↓-3.7
12/31 17:20	101.9	↓-4.0
12/31 17:30	97.7	↓-4.2
12/31 17:40	93.3	↓-4.4
12/31 17:50	88.6	↓-4.7
12/31 18:00	83.9	↓-4.7
12/31 18:10	79.0	↓-4.9
12/31 18:20	74.0	↓-5.0
12/31 18:30	68.9	↓-5.1
12/31 18:40	63.7	↓-5.2	最大潮位差
12/31 18:50	58.6	↓-5.1
12/31 19:00	53.5	↓-5.1
12/31 19:10	48.4	↓-5.1
12/31 19:20	43.4	↓-5.0
12/31 19:30	38.5	↓-4.9
12/31 19:40	33.7	↓-4.8
12/31 19:50	29.1	↓-4.6
12/31 20:00	24.7	↓-4.4
12/31 20:10	20.5	↓-4.2
12/31 20:20	16.6	↓-3.9
12/31 20:30	12.9	↓-3.7
12/31 20:40	9.5	↓-3.4
12/31 20:50	6.4	↓-3.1
12/31 21:00	3.6	↓-2.8
12/31 21:10	1.1	↓-2.5
12/31 21:20	-1.1	↓-2.2
12/31 21:30	-2.9	↓-1.8
12/31 21:40	-4.4	↓-1.5
12/31 21:50	-5.6	↓-1.2
12/31 22:00	-6.3	↓-0.7
12/31 22:10	-6.7	↓-0.4	干潮
12/31 22:20	-6.8	↓-0.1
12/31 22:30	-6.4	↑0.4
12/31 22:40	-5.7	↑0.7
12/31 22:50	-4.6	↑1.1
12/31 23:00	-3.2	↑1.4
12/31 23:10	-1.4	↑1.8
12/31 23:20	0.8	↑2.2
12/31 23:30	3.4	↑2.6
12/31 23:40	6.2	↑2.8
12/31 23:50	9.4	↑3.2