31 (金)	02:40	07:27	12:53	20:22
	108cm	82cm	122cm	7cm
中潮 出 06:49 入 16:34 出 03:42 入 13:58

那珂湊（茨城）2021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	84.0	↑2.8
12/31 00:10	86.7	↑2.7
12/31 00:20	89.2	↑2.5
12/31 00:30	91.7	↑2.5
12/31 00:40	94.0	↑2.3
12/31 00:50	96.1	↑2.1
12/31 01:00	98.0	↑1.9
12/31 01:10	99.8	↑1.8
12/31 01:20	101.3	↑1.5
12/31 01:30	102.7	↑1.4
12/31 01:40	103.9	↑1.2
12/31 01:50	104.9	↑1.0
12/31 02:00	105.8	↑0.9
12/31 02:10	106.4	↑0.6
12/31 02:20	106.8	↑0.4
12/31 02:30	107.1	↑0.3	満潮
12/31 02:40	107.1	0	満潮
12/31 02:50	107.0	↓-0.1
12/31 03:00	106.8	↓-0.2
12/31 03:10	106.4	↓-0.4
12/31 03:20	105.8	↓-0.6
12/31 03:30	105.1	↓-0.7
12/31 03:40	104.2	↓-0.9
12/31 03:50	103.3	↓-0.9
12/31 04:00	102.3	↓-1.0
12/31 04:10	101.1	↓-1.2
12/31 04:20	99.9	↓-1.2
12/31 04:30	98.7	↓-1.2
12/31 04:40	97.3	↓-1.4
12/31 04:50	96.0	↓-1.3
12/31 05:00	94.7	↓-1.3
12/31 05:10	93.3	↓-1.4
12/31 05:20	92.0	↓-1.3
12/31 05:30	90.7	↓-1.3
12/31 05:40	89.4	↓-1.3
12/31 05:50	88.2	↓-1.2
12/31 06:00	87.1	↓-1.1
12/31 06:10	86.0	↓-1.1
12/31 06:20	85.1	↓-0.9
12/31 06:30	84.2	↓-0.9
12/31 06:40	83.5	↓-0.7
12/31 06:50	82.9	↓-0.6
12/31 07:00	82.5	↓-0.4
12/31 07:10	82.2	↓-0.3
12/31 07:20	82.0	↓-0.2	干潮
12/31 07:30	82.0	0
12/31 07:40	82.1	↑0.1
12/31 07:50	82.4	↑0.3
12/31 08:00	82.9	↑0.5
12/31 08:10	83.5	↑0.6
12/31 08:20	84.3	↑0.8
12/31 08:30	85.2	↑0.9
12/31 08:40	86.3	↑1.1
12/31 08:50	87.5	↑1.2
12/31 09:00	88.8	↑1.3
12/31 09:10	90.3	↑1.5
12/31 09:20	91.8	↑1.5
12/31 09:30	93.5	↑1.7
12/31 09:40	95.2	↑1.7
12/31 09:50	97.0	↑1.8
12/31 10:00	98.8	↑1.8
12/31 10:10	100.7	↑1.9
12/31 10:20	102.6	↑1.9
12/31 10:30	104.5	↑1.9
12/31 10:40	106.3	↑1.8
12/31 10:50	108.2	↑1.9
12/31 11:00	110.0	↑1.8
12/31 11:10	111.7	↑1.7
12/31 11:20	113.3	↑1.6
12/31 11:30	114.8	↑1.5
12/31 11:40	116.2	↑1.4
12/31 11:50	117.4	↑1.2
12/31 12:00	118.5	↑1.1
12/31 12:10	119.5	↑1.0
12/31 12:20	120.2	↑0.7
12/31 12:30	120.8	↑0.6
12/31 12:40	121.2	↑0.4
12/31 12:50	121.3	↑0.1	満潮
12/31 13:00	121.3	0
12/31 13:10	121.0	↓-0.3
12/31 13:20	120.4	↓-0.6
12/31 13:30	119.7	↓-0.7
12/31 13:40	118.7	↓-1.0
12/31 13:50	117.4	↓-1.3
12/31 14:00	116.0	↓-1.4
12/31 14:10	114.2	↓-1.8
12/31 14:20	112.3	↓-1.9
12/31 14:30	110.1	↓-2.2
12/31 14:40	107.7	↓-2.4
12/31 14:50	105.1	↓-2.6
12/31 15:00	102.3	↓-2.8
12/31 15:10	99.3	↓-3.0
12/31 15:20	96.1	↓-3.2
12/31 15:30	92.8	↓-3.3
12/31 15:40	89.3	↓-3.5
12/31 15:50	85.6	↓-3.7
12/31 16:00	81.9	↓-3.7
12/31 16:10	78.0	↓-3.9
12/31 16:20	74.1	↓-3.9
12/31 16:30	70.1	↓-4.0
12/31 16:40	66.0	↓-4.1	最大潮位差
12/31 16:50	61.9	↓-4.1	最大潮位差
12/31 17:00	57.9	↓-4.0
12/31 17:10	53.8	↓-4.1	最大潮位差
12/31 17:20	49.8	↓-4.0
12/31 17:30	45.9	↓-3.9
12/31 17:40	42.0	↓-3.9
12/31 17:50	38.3	↓-3.7
12/31 18:00	34.6	↓-3.7
12/31 18:10	31.2	↓-3.4
12/31 18:20	27.8	↓-3.4
12/31 18:30	24.7	↓-3.1
12/31 18:40	21.8	↓-2.9
12/31 18:50	19.1	↓-2.7
12/31 19:00	16.6	↓-2.5
12/31 19:10	14.4	↓-2.2
12/31 19:20	12.5	↓-1.9
12/31 19:30	10.8	↓-1.7
12/31 19:40	9.4	↓-1.4
12/31 19:50	8.3	↓-1.1
12/31 20:00	7.5	↓-0.8
12/31 20:10	7.0	↓-0.5
12/31 20:20	6.8	↓-0.2	干潮
12/31 20:30	6.9	↑0.1
12/31 20:40	7.3	↑0.4
12/31 20:50	8.0	↑0.7
12/31 21:00	9.0	↑1.0
12/31 21:10	10.3	↑1.3
12/31 21:20	11.9	↑1.6
12/31 21:30	13.8	↑1.9
12/31 21:40	15.9	↑2.1
12/31 21:50	18.3	↑2.4
12/31 22:00	20.9	↑2.6
12/31 22:10	23.7	↑2.8
12/31 22:20	26.7	↑3.0
12/31 22:30	29.9	↑3.2
12/31 22:40	33.2	↑3.3
12/31 22:50	36.7	↑3.5
12/31 23:00	40.4	↑3.7
12/31 23:10	44.1	↑3.7
12/31 23:20	47.9	↑3.8
12/31 23:30	51.7	↑3.8
12/31 23:40	55.6	↑3.9
12/31 23:50	59.5	↑3.9