20 (木)	06:19	10:49	15:52	23:22
	121cm	94cm	126cm	0cm
大潮 出 06:45 入 16:27 出 17:45 入 08:13

那珂湊（茨城）2040年12月20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
12/20 00:00	6.3	↑2.2
12/20 00:10	8.7	↑2.4
12/20 00:20	11.4	↑2.7
12/20 00:30	14.3	↑2.9
12/20 00:40	17.5	↑3.2
12/20 00:50	20.8	↑3.3
12/20 01:00	24.4	↑3.6
12/20 01:10	28.1	↑3.7
12/20 01:20	32.0	↑3.9
12/20 01:30	36.0	↑4.0
12/20 01:40	40.1	↑4.1
12/20 01:50	44.3	↑4.2
12/20 02:00	48.6	↑4.3
12/20 02:10	52.9	↑4.3
12/20 02:20	57.2	↑4.3
12/20 02:30	61.5	↑4.3
12/20 02:40	65.8	↑4.3
12/20 02:50	70.1	↑4.3
12/20 03:00	74.3	↑4.2
12/20 03:10	78.4	↑4.1
12/20 03:20	82.4	↑4.0
12/20 03:30	86.3	↑3.9
12/20 03:40	90.1	↑3.8
12/20 03:50	93.7	↑3.6
12/20 04:00	97.1	↑3.4
12/20 04:10	100.3	↑3.2
12/20 04:20	103.3	↑3.0
12/20 04:30	106.1	↑2.8
12/20 04:40	108.6	↑2.5
12/20 04:50	111.0	↑2.4
12/20 05:00	113.0	↑2.0
12/20 05:10	114.9	↑1.9
12/20 05:20	116.4	↑1.5
12/20 05:30	117.8	↑1.4
12/20 05:40	118.8	↑1.0
12/20 05:50	119.6	↑0.8
12/20 06:00	120.2	↑0.6
12/20 06:10	120.5	↑0.3	満潮
12/20 06:20	120.6	↑0.1
12/20 06:30	120.4	↓-0.2
12/20 06:40	120.1	↓-0.3
12/20 06:50	119.5	↓-0.6
12/20 07:00	118.8	↓-0.7
12/20 07:10	117.9	↓-0.9
12/20 07:20	116.8	↓-1.1
12/20 07:30	115.6	↓-1.2
12/20 07:40	114.3	↓-1.3
12/20 07:50	113.0	↓-1.3
12/20 08:00	111.5	↓-1.5
12/20 08:10	110.0	↓-1.5
12/20 08:20	108.5	↓-1.5
12/20 08:30	106.9	↓-1.6
12/20 08:40	105.4	↓-1.5
12/20 08:50	103.9	↓-1.5
12/20 09:00	102.5	↓-1.4
12/20 09:10	101.1	↓-1.4
12/20 09:20	99.8	↓-1.3
12/20 09:30	98.6	↓-1.2
12/20 09:40	97.5	↓-1.1
12/20 09:50	96.6	↓-0.9
12/20 10:00	95.7	↓-0.9
12/20 10:10	95.1	↓-0.6
12/20 10:20	94.5	↓-0.6
12/20 10:30	94.2	↓-0.3
12/20 10:40	93.9	↓-0.3	干潮
12/20 10:50	93.9	0
12/20 11:00	94.0	↑0.1
12/20 11:10	94.3	↑0.3
12/20 11:20	94.7	↑0.4
12/20 11:30	95.3	↑0.6
12/20 11:40	96.0	↑0.7
12/20 11:50	96.8	↑0.8
12/20 12:00	97.8	↑1.0
12/20 12:10	98.9	↑1.1
12/20 12:20	100.1	↑1.2
12/20 12:30	101.4	↑1.3
12/20 12:40	102.8	↑1.4
12/20 12:50	104.3	↑1.5
12/20 13:00	105.8	↑1.5
12/20 13:10	107.4	↑1.6
12/20 13:20	109.0	↑1.6
12/20 13:30	110.6	↑1.6
12/20 13:40	112.2	↑1.6
12/20 13:50	113.7	↑1.5
12/20 14:00	115.3	↑1.6
12/20 14:10	116.8	↑1.5
12/20 14:20	118.2	↑1.4
12/20 14:30	119.5	↑1.3
12/20 14:40	120.8	↑1.3
12/20 14:50	121.9	↑1.1
12/20 15:00	122.9	↑1.0
12/20 15:10	123.7	↑0.8
12/20 15:20	124.4	↑0.7
12/20 15:30	124.9	↑0.5
12/20 15:40	125.2	↑0.3
12/20 15:50	125.3	↑0.1	満潮
12/20 16:00	125.2	↓-0.1
12/20 16:10	124.9	↓-0.3
12/20 16:20	124.4	↓-0.5
12/20 16:30	123.6	↓-0.8
12/20 16:40	122.6	↓-1.0
12/20 16:50	121.3	↓-1.3
12/20 17:00	119.7	↓-1.6
12/20 17:10	118.0	↓-1.7
12/20 17:20	115.9	↓-2.1
12/20 17:30	113.6	↓-2.3
12/20 17:40	111.1	↓-2.5
12/20 17:50	108.3	↓-2.8
12/20 18:00	105.3	↓-3.0
12/20 18:10	102.0	↓-3.3
12/20 18:20	98.6	↓-3.4
12/20 18:30	94.9	↓-3.7
12/20 18:40	91.1	↓-3.8
12/20 18:50	87.1	↓-4.0
12/20 19:00	82.9	↓-4.2
12/20 19:10	78.7	↓-4.2
12/20 19:20	74.3	↓-4.4
12/20 19:30	69.8	↓-4.5
12/20 19:40	65.3	↓-4.5
12/20 19:50	60.8	↓-4.5
12/20 20:00	56.2	↓-4.6	最大潮位差
12/20 20:10	51.7	↓-4.5
12/20 20:20	47.2	↓-4.5
12/20 20:30	42.8	↓-4.4
12/20 20:40	38.5	↓-4.3
12/20 20:50	34.3	↓-4.2
12/20 21:00	30.3	↓-4.0
12/20 21:10	26.4	↓-3.9
12/20 21:20	22.8	↓-3.6
12/20 21:30	19.3	↓-3.5
12/20 21:40	16.1	↓-3.2
12/20 21:50	13.1	↓-3.0
12/20 22:00	10.4	↓-2.7
12/20 22:10	8.0	↓-2.4
12/20 22:20	5.9	↓-2.1
12/20 22:30	4.1	↓-1.8
12/20 22:40	2.5	↓-1.6
12/20 22:50	1.4	↓-1.1
12/20 23:00	0.5	↓-0.9
12/20 23:10	0.0	↓-0.5
12/20 23:20	-0.2	0	干潮
12/20 23:30	-0.1	↑0.1
12/20 23:40	0.3	↑0.4
12/20 23:50	1.1	↑0.8