20 (金)	03:23	08:25	13:49	21:01
	107cm	72cm	115cm	0cm
中潮 出 06:20 入 17:25 出 15:08 入 04:21

那珂湊（茨城）2054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	63.8	↑3.7
2/20 00:10	67.4	↑3.6
2/20 00:20	70.9	↑3.5
2/20 00:30	74.4	↑3.5
2/20 00:40	77.7	↑3.3
2/20 00:50	80.9	↑3.2
2/20 01:00	84.0	↑3.1
2/20 01:10	86.9	↑2.9
2/20 01:20	89.6	↑2.7
2/20 01:30	92.2	↑2.6
2/20 01:40	94.5	↑2.3
2/20 01:50	96.7	↑2.2
2/20 02:00	98.6	↑1.9
2/20 02:10	100.4	↑1.8
2/20 02:20	101.9	↑1.5
2/20 02:30	103.1	↑1.2
2/20 02:40	104.2	↑1.1
2/20 02:50	105.0	↑0.8
2/20 03:00	105.6	↑0.6
2/20 03:10	106.0	↑0.4
2/20 03:20	106.1	↑0.1	満潮
2/20 03:30	106.0	↓-0.1
2/20 03:40	105.7	↓-0.3
2/20 03:50	105.3	↓-0.4
2/20 04:00	104.6	↓-0.7
2/20 04:10	103.8	↓-0.8
2/20 04:20	102.7	↓-1.1
2/20 04:30	101.6	↓-1.1
2/20 04:40	100.3	↓-1.3
2/20 04:50	98.9	↓-1.4
2/20 05:00	97.3	↓-1.6
2/20 05:10	95.7	↓-1.6
2/20 05:20	94.0	↓-1.7
2/20 05:30	92.3	↓-1.7
2/20 05:40	90.5	↓-1.8
2/20 05:50	88.7	↓-1.8
2/20 06:00	86.9	↓-1.8
2/20 06:10	85.1	↓-1.8
2/20 06:20	83.4	↓-1.7
2/20 06:30	81.7	↓-1.7
2/20 06:40	80.1	↓-1.6
2/20 06:50	78.6	↓-1.5
2/20 07:00	77.2	↓-1.4
2/20 07:10	75.9	↓-1.3
2/20 07:20	74.7	↓-1.2
2/20 07:30	73.7	↓-1.0
2/20 07:40	72.8	↓-0.9
2/20 07:50	72.2	↓-0.6
2/20 08:00	71.6	↓-0.6
2/20 08:10	71.3	↓-0.3
2/20 08:20	71.1	↓-0.2	干潮
2/20 08:30	71.1	0
2/20 08:40	71.4	↑0.3
2/20 08:50	71.8	↑0.4
2/20 09:00	72.4	↑0.6
2/20 09:10	73.1	↑0.7
2/20 09:20	74.1	↑1.0
2/20 09:30	75.2	↑1.1
2/20 09:40	76.5	↑1.3
2/20 09:50	77.9	↑1.4
2/20 10:00	79.4	↑1.5
2/20 10:10	81.1	↑1.7
2/20 10:20	82.9	↑1.8
2/20 10:30	84.8	↑1.9
2/20 10:40	86.8	↑2.0
2/20 10:50	88.8	↑2.0
2/20 11:00	90.9	↑2.1
2/20 11:10	93.0	↑2.1
2/20 11:20	95.1	↑2.1
2/20 11:30	97.2	↑2.1
2/20 11:40	99.2	↑2.0
2/20 11:50	101.3	↑2.1
2/20 12:00	103.2	↑1.9
2/20 12:10	105.0	↑1.8
2/20 12:20	106.8	↑1.8
2/20 12:30	108.4	↑1.6
2/20 12:40	109.9	↑1.5
2/20 12:50	111.2	↑1.3
2/20 13:00	112.3	↑1.1
2/20 13:10	113.3	↑1.0
2/20 13:20	114.0	↑0.7
2/20 13:30	114.5	↑0.5
2/20 13:40	114.8	↑0.3	満潮
2/20 13:50	114.9	↑0.1
2/20 14:00	114.7	↓-0.2
2/20 14:10	114.3	↓-0.4
2/20 14:20	113.6	↓-0.7
2/20 14:30	112.7	↓-0.9
2/20 14:40	111.5	↓-1.2
2/20 14:50	110.0	↓-1.5
2/20 15:00	108.3	↓-1.7
2/20 15:10	106.3	↓-2.0
2/20 15:20	104.1	↓-2.2
2/20 15:30	101.6	↓-2.5
2/20 15:40	98.9	↓-2.7
2/20 15:50	95.9	↓-3.0
2/20 16:00	92.8	↓-3.1
2/20 16:10	89.5	↓-3.3
2/20 16:20	85.9	↓-3.6
2/20 16:30	82.3	↓-3.6
2/20 16:40	78.4	↓-3.9
2/20 16:50	74.5	↓-3.9
2/20 17:00	70.4	↓-4.1
2/20 17:10	66.2	↓-4.2
2/20 17:20	62.0	↓-4.2
2/20 17:30	57.8	↓-4.2
2/20 17:40	53.5	↓-4.3	最大潮位差
2/20 17:50	49.2	↓-4.3	最大潮位差
2/20 18:00	45.0	↓-4.2
2/20 18:10	40.8	↓-4.2
2/20 18:20	36.7	↓-4.1
2/20 18:30	32.8	↓-3.9
2/20 18:40	28.9	↓-3.9
2/20 18:50	25.2	↓-3.7
2/20 19:00	21.7	↓-3.5
2/20 19:10	18.4	↓-3.3
2/20 19:20	15.2	↓-3.2
2/20 19:30	12.4	↓-2.8
2/20 19:40	9.8	↓-2.6
2/20 19:50	7.4	↓-2.4
2/20 20:00	5.3	↓-2.1
2/20 20:10	3.6	↓-1.7
2/20 20:20	2.1	↓-1.5
2/20 20:30	1.0	↓-1.1
2/20 20:40	0.2	↓-0.8
2/20 20:50	-0.3	↓-0.5
2/20 21:00	-0.5	↓-0.2	干潮
2/20 21:10	-0.3	↑0.2
2/20 21:20	0.2	↑0.5
2/20 21:30	1.0	↑0.8
2/20 21:40	2.2	↑1.2
2/20 21:50	3.6	↑1.4
2/20 22:00	5.4	↑1.8
2/20 22:10	7.5	↑2.1
2/20 22:20	9.8	↑2.3
2/20 22:30	12.4	↑2.6
2/20 22:40	15.3	↑2.9
2/20 22:50	18.3	↑3.0
2/20 23:00	21.6	↑3.3
2/20 23:10	25.1	↑3.5
2/20 23:20	28.7	↑3.6
2/20 23:30	32.5	↑3.8
2/20 23:40	36.4	↑3.9
2/20 23:50	40.5	↑4.1