20 (月)	05:02	10:03	15:32	22:36
	114cm	70cm	123cm	-7cm
大潮 出 06:21 入 17:24 出 06:33 入 17:14

那珂湊（茨城）2023年02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
2/20 00:00	16.6	↑3.8
2/20 00:10	20.5	↑3.9
2/20 00:20	24.6	↑4.1
2/20 00:30	28.8	↑4.2
2/20 00:40	33.1	↑4.3
2/20 00:50	37.6	↑4.5
2/20 01:00	42.1	↑4.5
2/20 01:10	46.6	↑4.5
2/20 01:20	51.2	↑4.6
2/20 01:30	55.8	↑4.6
2/20 01:40	60.3	↑4.5
2/20 01:50	64.8	↑4.5
2/20 02:00	69.2	↑4.4
2/20 02:10	73.5	↑4.3
2/20 02:20	77.7	↑4.2
2/20 02:30	81.7	↑4.0
2/20 02:40	85.5	↑3.8
2/20 02:50	89.2	↑3.7
2/20 03:00	92.7	↑3.5
2/20 03:10	95.9	↑3.2
2/20 03:20	98.9	↑3.0
2/20 03:30	101.6	↑2.7
2/20 03:40	104.1	↑2.5
2/20 03:50	106.3	↑2.2
2/20 04:00	108.2	↑1.9
2/20 04:10	109.8	↑1.6
2/20 04:20	111.2	↑1.4
2/20 04:30	112.2	↑1.0
2/20 04:40	113.0	↑0.8
2/20 04:50	113.4	↑0.4
2/20 05:00	113.6	↑0.2	満潮
2/20 05:10	113.5	↓-0.1
2/20 05:20	113.1	↓-0.4
2/20 05:30	112.5	↓-0.6
2/20 05:40	111.6	↓-0.9
2/20 05:50	110.5	↓-1.1
2/20 06:00	109.2	↓-1.3
2/20 06:10	107.6	↓-1.6
2/20 06:20	105.9	↓-1.7
2/20 06:30	104.1	↓-1.8
2/20 06:40	102.1	↓-2.0
2/20 06:50	100.0	↓-2.1
2/20 07:00	97.8	↓-2.2
2/20 07:10	95.6	↓-2.2
2/20 07:20	93.3	↓-2.3
2/20 07:30	91.0	↓-2.3
2/20 07:40	88.8	↓-2.2
2/20 07:50	86.5	↓-2.3
2/20 08:00	84.3	↓-2.2
2/20 08:10	82.2	↓-2.1
2/20 08:20	80.2	↓-2.0
2/20 08:30	78.3	↓-1.9
2/20 08:40	76.6	↓-1.7
2/20 08:50	75.0	↓-1.6
2/20 09:00	73.6	↓-1.4
2/20 09:10	72.4	↓-1.2
2/20 09:20	71.4	↓-1.0
2/20 09:30	70.5	↓-0.9
2/20 09:40	69.9	↓-0.6
2/20 09:50	69.6	↓-0.3
2/20 10:00	69.4	↓-0.2	干潮
2/20 10:10	69.5	↑0.1
2/20 10:20	69.8	↑0.3
2/20 10:30	70.3	↑0.5
2/20 10:40	71.1	↑0.8
2/20 10:50	72.0	↑0.9
2/20 11:00	73.2	↑1.2
2/20 11:10	74.6	↑1.4
2/20 11:20	76.1	↑1.5
2/20 11:30	77.9	↑1.8
2/20 11:40	79.8	↑1.9
2/20 11:50	81.8	↑2.0
2/20 12:00	83.9	↑2.1
2/20 12:10	86.2	↑2.3
2/20 12:20	88.6	↑2.4
2/20 12:30	91.0	↑2.4
2/20 12:40	93.5	↑2.5
2/20 12:50	96.0	↑2.5
2/20 13:00	98.5	↑2.5
2/20 13:10	101.0	↑2.5
2/20 13:20	103.5	↑2.5
2/20 13:30	105.9	↑2.4
2/20 13:40	108.3	↑2.4
2/20 13:50	110.5	↑2.2
2/20 14:00	112.6	↑2.1
2/20 14:10	114.6	↑2.0
2/20 14:20	116.4	↑1.8
2/20 14:30	118.0	↑1.6
2/20 14:40	119.4	↑1.4
2/20 14:50	120.6	↑1.2
2/20 15:00	121.6	↑1.0
2/20 15:10	122.3	↑0.7
2/20 15:20	122.7	↑0.4
2/20 15:30	122.9	↑0.2	満潮
2/20 15:40	122.8	↓-0.1
2/20 15:50	122.4	↓-0.4
2/20 16:00	121.6	↓-0.8
2/20 16:10	120.6	↓-1.0
2/20 16:20	119.3	↓-1.3
2/20 16:30	117.6	↓-1.7
2/20 16:40	115.6	↓-2.0
2/20 16:50	113.4	↓-2.2
2/20 17:00	110.8	↓-2.6
2/20 17:10	107.9	↓-2.9
2/20 17:20	104.8	↓-3.1
2/20 17:30	101.4	↓-3.4
2/20 17:40	97.7	↓-3.7
2/20 17:50	93.8	↓-3.9
2/20 18:00	89.7	↓-4.1
2/20 18:10	85.4	↓-4.3
2/20 18:20	80.9	↓-4.5
2/20 18:30	76.3	↓-4.6
2/20 18:40	71.6	↓-4.7
2/20 18:50	66.7	↓-4.9
2/20 19:00	61.8	↓-4.9
2/20 19:10	56.9	↓-4.9
2/20 19:20	52.0	↓-4.9
2/20 19:30	47.0	↓-5.0	最大潮位差
2/20 19:40	42.2	↓-4.8
2/20 19:50	37.4	↓-4.8
2/20 20:00	32.8	↓-4.6
2/20 20:10	28.2	↓-4.6
2/20 20:20	23.9	↓-4.3
2/20 20:30	19.7	↓-4.2
2/20 20:40	15.8	↓-3.9
2/20 20:50	12.1	↓-3.7
2/20 21:00	8.7	↓-3.4
2/20 21:10	5.6	↓-3.1
2/20 21:20	2.7	↓-2.9
2/20 21:30	0.2	↓-2.5
2/20 21:40	-1.9	↓-2.1
2/20 21:50	-3.7	↓-1.8
2/20 22:00	-5.2	↓-1.5
2/20 22:10	-6.3	↓-1.1
2/20 22:20	-7.0	↓-0.7
2/20 22:30	-7.4	↓-0.4	干潮
2/20 22:40	-7.4	0
2/20 22:50	-7.0	↑0.4
2/20 23:00	-6.2	↑0.8
2/20 23:10	-5.1	↑1.1
2/20 23:20	-3.7	↑1.4
2/20 23:30	-1.9	↑1.8
2/20 23:40	0.2	↑2.1
2/20 23:50	2.7	↑2.5