31 (火)	08:13	00:45	18:10	13:13
	116cm	14cm	108cm	86cm
中潮 出 06:49 入 16:34 出 10:18 入 21:17

那珂湊（茨城）2019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	16.3	↓-1.3
12/31 00:10	15.2	↓-1.1
12/31 00:20	14.4	↓-0.8
12/31 00:30	13.9	↓-0.5
12/31 00:40	13.7	↓-0.2	干潮
12/31 00:50	13.7	0
12/31 01:00	14.0	↑0.3
12/31 01:10	14.6	↑0.6
12/31 01:20	15.4	↑0.8
12/31 01:30	16.5	↑1.1
12/31 01:40	17.8	↑1.3
12/31 01:50	19.4	↑1.6
12/31 02:00	21.2	↑1.8
12/31 02:10	23.2	↑2.0
12/31 02:20	25.4	↑2.2
12/31 02:30	27.8	↑2.4
12/31 02:40	30.4	↑2.6
12/31 02:50	33.2	↑2.8
12/31 03:00	36.1	↑2.9
12/31 03:10	39.1	↑3.0
12/31 03:20	42.3	↑3.2
12/31 03:30	45.6	↑3.3
12/31 03:40	48.9	↑3.3
12/31 03:50	52.4	↑3.5
12/31 04:00	55.9	↑3.5
12/31 04:10	59.4	↑3.5
12/31 04:20	63.0	↑3.6	最大潮位差
12/31 04:30	66.6	↑3.6	最大潮位差
12/31 04:40	70.2	↑3.6	最大潮位差
12/31 04:50	73.7	↑3.5
12/31 05:00	77.2	↑3.5
12/31 05:10	80.6	↑3.4
12/31 05:20	84.0	↑3.4
12/31 05:30	87.2	↑3.2
12/31 05:40	90.4	↑3.2
12/31 05:50	93.4	↑3.0
12/31 06:00	96.3	↑2.9
12/31 06:10	99.0	↑2.7
12/31 06:20	101.5	↑2.5
12/31 06:30	103.8	↑2.3
12/31 06:40	106.0	↑2.2
12/31 06:50	107.9	↑1.9
12/31 07:00	109.7	↑1.8
12/31 07:10	111.2	↑1.5
12/31 07:20	112.4	↑1.2
12/31 07:30	113.5	↑1.1
12/31 07:40	114.3	↑0.8
12/31 07:50	114.9	↑0.6
12/31 08:00	115.3	↑0.4
12/31 08:10	115.4	↑0.1	満潮
12/31 08:20	115.3	↓-0.1
12/31 08:30	115.0	↓-0.3
12/31 08:40	114.6	↓-0.4
12/31 08:50	113.9	↓-0.7
12/31 09:00	113.1	↓-0.8
12/31 09:10	112.1	↓-1.0
12/31 09:20	111.0	↓-1.1
12/31 09:30	109.8	↓-1.2
12/31 09:40	108.4	↓-1.4
12/31 09:50	107.0	↓-1.4
12/31 10:00	105.5	↓-1.5
12/31 10:10	104.0	↓-1.5
12/31 10:20	102.4	↓-1.6
12/31 10:30	100.8	↓-1.6
12/31 10:40	99.3	↓-1.5
12/31 10:50	97.7	↓-1.6
12/31 11:00	96.2	↓-1.5
12/31 11:10	94.8	↓-1.4
12/31 11:20	93.4	↓-1.4
12/31 11:30	92.1	↓-1.3
12/31 11:40	90.9	↓-1.2
12/31 11:50	89.8	↓-1.1
12/31 12:00	88.8	↓-1.0
12/31 12:10	87.9	↓-0.9
12/31 12:20	87.2	↓-0.7
12/31 12:30	86.6	↓-0.6
12/31 12:40	86.1	↓-0.5
12/31 12:50	85.7	↓-0.4
12/31 13:00	85.5	↓-0.2
12/31 13:10	85.4	↓-0.1	干潮
12/31 13:20	85.4	0
12/31 13:30	85.6	↑0.2
12/31 13:40	85.9	↑0.3
12/31 13:50	86.3	↑0.4
12/31 14:00	86.8	↑0.5
12/31 14:10	87.4	↑0.6
12/31 14:20	88.1	↑0.7
12/31 14:30	88.8	↑0.7
12/31 14:40	89.7	↑0.9
12/31 14:50	90.6	↑0.9
12/31 15:00	91.6	↑1.0
12/31 15:10	92.7	↑1.1
12/31 15:20	93.7	↑1.0
12/31 15:30	94.8	↑1.1
12/31 15:40	96.0	↑1.2
12/31 15:50	97.1	↑1.1
12/31 16:00	98.2	↑1.1
12/31 16:10	99.4	↑1.2
12/31 16:20	100.5	↑1.1
12/31 16:30	101.5	↑1.0
12/31 16:40	102.5	↑1.0
12/31 16:50	103.5	↑1.0
12/31 17:00	104.4	↑0.9
12/31 17:10	105.2	↑0.8
12/31 17:20	105.9	↑0.7
12/31 17:30	106.5	↑0.6
12/31 17:40	107.0	↑0.5
12/31 17:50	107.3	↑0.3
12/31 18:00	107.5	↑0.2	満潮
12/31 18:10	107.6	↑0.1	満潮
12/31 18:20	107.5	↓-0.1
12/31 18:30	107.2	↓-0.3
12/31 18:40	106.8	↓-0.4
12/31 18:50	106.2	↓-0.6
12/31 19:00	105.3	↓-0.9
12/31 19:10	104.3	↓-1.0
12/31 19:20	103.2	↓-1.1
12/31 19:30	101.8	↓-1.4
12/31 19:40	100.2	↓-1.6
12/31 19:50	98.4	↓-1.8
12/31 20:00	96.4	↓-2.0
12/31 20:10	94.3	↓-2.1
12/31 20:20	92.0	↓-2.3
12/31 20:30	89.5	↓-2.5
12/31 20:40	86.9	↓-2.6
12/31 20:50	84.1	↓-2.8
12/31 21:00	81.2	↓-2.9
12/31 21:10	78.2	↓-3.0
12/31 21:20	75.1	↓-3.1
12/31 21:30	72.0	↓-3.1
12/31 21:40	68.7	↓-3.3
12/31 21:50	65.5	↓-3.2
12/31 22:00	62.2	↓-3.3
12/31 22:10	59.0	↓-3.2
12/31 22:20	55.8	↓-3.2
12/31 22:30	52.6	↓-3.2
12/31 22:40	49.5	↓-3.1
12/31 22:50	46.5	↓-3.0
12/31 23:00	43.6	↓-2.9
12/31 23:10	40.8	↓-2.8
12/31 23:20	38.2	↓-2.6
12/31 23:30	35.8	↓-2.4
12/31 23:40	33.5	↓-2.3
12/31 23:50	31.4	↓-2.1