31 (木)	06:02	10:38	15:38	23:07
	121cm	92cm	124cm	-4cm
大潮 出 06:49 入 16:34 出 17:30 入 07:40

那珂湊（茨城）2020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	10.3	↑2.6
12/31 00:10	13.2	↑2.9
12/31 00:20	16.3	↑3.1
12/31 00:30	19.7	↑3.4
12/31 00:40	23.2	↑3.5
12/31 00:50	26.9	↑3.7
12/31 01:00	30.7	↑3.8
12/31 01:10	34.7	↑4.0
12/31 01:20	38.8	↑4.1
12/31 01:30	43.0	↑4.2
12/31 01:40	47.3	↑4.3
12/31 01:50	51.6	↑4.3
12/31 02:00	55.9	↑4.3
12/31 02:10	60.2	↑4.3
12/31 02:20	64.6	↑4.4
12/31 02:30	68.8	↑4.2
12/31 02:40	73.1	↑4.3
12/31 02:50	77.2	↑4.1
12/31 03:00	81.3	↑4.1
12/31 03:10	85.2	↑3.9
12/31 03:20	89.0	↑3.8
12/31 03:30	92.6	↑3.6
12/31 03:40	96.1	↑3.5
12/31 03:50	99.4	↑3.3
12/31 04:00	102.4	↑3.0
12/31 04:10	105.3	↑2.9
12/31 04:20	107.9	↑2.6
12/31 04:30	110.4	↑2.5
12/31 04:40	112.5	↑2.1
12/31 04:50	114.4	↑1.9
12/31 05:00	116.1	↑1.7
12/31 05:10	117.5	↑1.4
12/31 05:20	118.7	↑1.2
12/31 05:30	119.6	↑0.9
12/31 05:40	120.2	↑0.6
12/31 05:50	120.6	↑0.4
12/31 06:00	120.7	↑0.1	満潮
12/31 06:10	120.6	↓-0.1
12/31 06:20	120.3	↓-0.3
12/31 06:30	119.8	↓-0.5
12/31 06:40	119.1	↓-0.7
12/31 06:50	118.2	↓-0.9
12/31 07:00	117.2	↓-1.0
12/31 07:10	116.0	↓-1.2
12/31 07:20	114.6	↓-1.4
12/31 07:30	113.2	↓-1.4
12/31 07:40	111.7	↓-1.5
12/31 07:50	110.1	↓-1.6
12/31 08:00	108.5	↓-1.6
12/31 08:10	106.8	↓-1.7
12/31 08:20	105.2	↓-1.6
12/31 08:30	103.5	↓-1.7
12/31 08:40	101.9	↓-1.6
12/31 08:50	100.4	↓-1.5
12/31 09:00	98.9	↓-1.5
12/31 09:10	97.6	↓-1.3
12/31 09:20	96.3	↓-1.3
12/31 09:30	95.2	↓-1.1
12/31 09:40	94.2	↓-1.0
12/31 09:50	93.4	↓-0.8
12/31 10:00	92.7	↓-0.7
12/31 10:10	92.1	↓-0.6
12/31 10:20	91.8	↓-0.3
12/31 10:30	91.6	↓-0.2	干潮
12/31 10:40	91.5	↓-0.1
12/31 10:50	91.7	↑0.2
12/31 11:00	92.0	↑0.3
12/31 11:10	92.5	↑0.5
12/31 11:20	93.1	↑0.6
12/31 11:30	93.9	↑0.8
12/31 11:40	94.8	↑0.9
12/31 11:50	95.9	↑1.1
12/31 12:00	97.0	↑1.1
12/31 12:10	98.3	↑1.3
12/31 12:20	99.7	↑1.4
12/31 12:30	101.2	↑1.5
12/31 12:40	102.7	↑1.5
12/31 12:50	104.3	↑1.6
12/31 13:00	105.9	↑1.6
12/31 13:10	107.5	↑1.6
12/31 13:20	109.2	↑1.7
12/31 13:30	110.8	↑1.6
12/31 13:40	112.4	↑1.6
12/31 13:50	114.0	↑1.6
12/31 14:00	115.5	↑1.5
12/31 14:10	116.9	↑1.4
12/31 14:20	118.2	↑1.3
12/31 14:30	119.4	↑1.2
12/31 14:40	120.5	↑1.1
12/31 14:50	121.5	↑1.0
12/31 15:00	122.3	↑0.8
12/31 15:10	122.9	↑0.6
12/31 15:20	123.3	↑0.4
12/31 15:30	123.6	↑0.3	満潮
12/31 15:40	123.6	0
12/31 15:50	123.4	↓-0.2
12/31 16:00	123.0	↓-0.4
12/31 16:10	122.3	↓-0.7
12/31 16:20	121.5	↓-0.8
12/31 16:30	120.3	↓-1.2
12/31 16:40	118.9	↓-1.4
12/31 16:50	117.3	↓-1.6
12/31 17:00	115.4	↓-1.9
12/31 17:10	113.2	↓-2.2
12/31 17:20	110.8	↓-2.4
12/31 17:30	108.1	↓-2.7
12/31 17:40	105.2	↓-2.9
12/31 17:50	102.1	↓-3.1
12/31 18:00	98.7	↓-3.4
12/31 18:10	95.1	↓-3.6
12/31 18:20	91.3	↓-3.8
12/31 18:30	87.4	↓-3.9
12/31 18:40	83.3	↓-4.1
12/31 18:50	79.0	↓-4.3
12/31 19:00	74.6	↓-4.4
12/31 19:10	70.1	↓-4.5
12/31 19:20	65.6	↓-4.5
12/31 19:30	61.0	↓-4.6
12/31 19:40	56.3	↓-4.7	最大潮位差
12/31 19:50	51.7	↓-4.6
12/31 20:00	47.1	↓-4.6
12/31 20:10	42.6	↓-4.5
12/31 20:20	38.1	↓-4.5
12/31 20:30	33.7	↓-4.4
12/31 20:40	29.5	↓-4.2
12/31 20:50	25.4	↓-4.1
12/31 21:00	21.6	↓-3.8
12/31 21:10	17.9	↓-3.7
12/31 21:20	14.4	↓-3.5
12/31 21:30	11.2	↓-3.2
12/31 21:40	8.3	↓-2.9
12/31 21:50	5.7	↓-2.6
12/31 22:00	3.3	↓-2.4
12/31 22:10	1.3	↓-2.0
12/31 22:20	-0.4	↓-1.7
12/31 22:30	-1.8	↓-1.4
12/31 22:40	-2.9	↓-1.1
12/31 22:50	-3.6	↓-0.7
12/31 23:00	-4.0	↓-0.4	干潮
12/31 23:10	-4.0	0
12/31 23:20	-3.7	↑0.3
12/31 23:30	-3.0	↑0.7
12/31 23:40	-2.0	↑1.0
12/31 23:50	-0.7	↑1.3