20 (日)	03:46	08:55	14:30	21:30
	109cm	65cm	120cm	1cm
大潮 出 06:20 入 17:25 出 04:51 入 15:53

那珂湊（茨城）2050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	51.7	↑4.0
2/20 00:10	55.7	↑4.0
2/20 00:20	59.7	↑4.0
2/20 00:30	63.6	↑3.9
2/20 00:40	67.5	↑3.9
2/20 00:50	71.3	↑3.8
2/20 01:00	75.0	↑3.7
2/20 01:10	78.6	↑3.6
2/20 01:20	82.1	↑3.5
2/20 01:30	85.3	↑3.2
2/20 01:40	88.5	↑3.2
2/20 01:50	91.4	↑2.9
2/20 02:00	94.1	↑2.7
2/20 02:10	96.6	↑2.5
2/20 02:20	98.9	↑2.3
2/20 02:30	100.9	↑2.0
2/20 02:40	102.7	↑1.8
2/20 02:50	104.3	↑1.6
2/20 03:00	105.6	↑1.3
2/20 03:10	106.6	↑1.0
2/20 03:20	107.4	↑0.8
2/20 03:30	107.9	↑0.5
2/20 03:40	108.1	↑0.2	満潮
2/20 03:50	108.1	0
2/20 04:00	107.9	↓-0.2
2/20 04:10	107.4	↓-0.5
2/20 04:20	106.7	↓-0.7
2/20 04:30	105.8	↓-0.9
2/20 04:40	104.6	↓-1.2
2/20 04:50	103.3	↓-1.3
2/20 05:00	101.8	↓-1.5
2/20 05:10	100.2	↓-1.6
2/20 05:20	98.4	↓-1.8
2/20 05:30	96.5	↓-1.9
2/20 05:40	94.5	↓-2.0
2/20 05:50	92.4	↓-2.1
2/20 06:00	90.3	↓-2.1
2/20 06:10	88.1	↓-2.2
2/20 06:20	85.9	↓-2.2
2/20 06:30	83.8	↓-2.1
2/20 06:40	81.6	↓-2.2
2/20 06:50	79.5	↓-2.1
2/20 07:00	77.5	↓-2.0
2/20 07:10	75.6	↓-1.9
2/20 07:20	73.7	↓-1.9
2/20 07:30	72.1	↓-1.6
2/20 07:40	70.5	↓-1.6
2/20 07:50	69.1	↓-1.4
2/20 08:00	67.9	↓-1.2
2/20 08:10	66.9	↓-1.0
2/20 08:20	66.0	↓-0.9
2/20 08:30	65.4	↓-0.6
2/20 08:40	65.0	↓-0.4
2/20 08:50	64.8	↓-0.2	干潮
2/20 09:00	64.8	0
2/20 09:10	65.1	↑0.3
2/20 09:20	65.5	↑0.4
2/20 09:30	66.2	↑0.7
2/20 09:40	67.1	↑0.9
2/20 09:50	68.2	↑1.1
2/20 10:00	69.5	↑1.3
2/20 10:10	71.0	↑1.5
2/20 10:20	72.7	↑1.7
2/20 10:30	74.5	↑1.8
2/20 10:40	76.5	↑2.0
2/20 10:50	78.6	↑2.1
2/20 11:00	80.8	↑2.2
2/20 11:10	83.1	↑2.3
2/20 11:20	85.5	↑2.4
2/20 11:30	88.0	↑2.5
2/20 11:40	90.5	↑2.5
2/20 11:50	93.0	↑2.5
2/20 12:00	95.5	↑2.5
2/20 12:10	98.0	↑2.5
2/20 12:20	100.5	↑2.5
2/20 12:30	102.9	↑2.4
2/20 12:40	105.1	↑2.2
2/20 12:50	107.3	↑2.2
2/20 13:00	109.4	↑2.1
2/20 13:10	111.3	↑1.9
2/20 13:20	113.0	↑1.7
2/20 13:30	114.5	↑1.5
2/20 13:40	115.9	↑1.4
2/20 13:50	117.0	↑1.1
2/20 14:00	117.9	↑0.9
2/20 14:10	118.6	↑0.7
2/20 14:20	118.9	↑0.3	満潮
2/20 14:30	119.1	↑0.2	満潮
2/20 14:40	118.9	↓-0.2
2/20 14:50	118.5	↓-0.4
2/20 15:00	117.8	↓-0.7
2/20 15:10	116.7	↓-1.1
2/20 15:20	115.4	↓-1.3
2/20 15:30	113.8	↓-1.6
2/20 15:40	112.0	↓-1.8
2/20 15:50	109.8	↓-2.2
2/20 16:00	107.4	↓-2.4
2/20 16:10	104.7	↓-2.7
2/20 16:20	101.7	↓-3.0
2/20 16:30	98.5	↓-3.2
2/20 16:40	95.1	↓-3.4
2/20 16:50	91.5	↓-3.6
2/20 17:00	87.7	↓-3.8
2/20 17:10	83.7	↓-4.0
2/20 17:20	79.6	↓-4.1
2/20 17:30	75.3	↓-4.3
2/20 17:40	70.9	↓-4.4
2/20 17:50	66.5	↓-4.4
2/20 18:00	62.0	↓-4.5	最大潮位差
2/20 18:10	57.5	↓-4.5	最大潮位差
2/20 18:20	53.0	↓-4.5	最大潮位差
2/20 18:30	48.5	↓-4.5	最大潮位差
2/20 18:40	44.1	↓-4.4
2/20 18:50	39.7	↓-4.4
2/20 19:00	35.5	↓-4.2
2/20 19:10	31.4	↓-4.1
2/20 19:20	27.5	↓-3.9
2/20 19:30	23.7	↓-3.8
2/20 19:40	20.2	↓-3.5
2/20 19:50	16.9	↓-3.3
2/20 20:00	13.9	↓-3.0
2/20 20:10	11.1	↓-2.8
2/20 20:20	8.6	↓-2.5
2/20 20:30	6.4	↓-2.2
2/20 20:40	4.6	↓-1.8
2/20 20:50	3.0	↓-1.6
2/20 21:00	1.8	↓-1.2
2/20 21:10	1.0	↓-0.8
2/20 21:20	0.5	↓-0.5	干潮
2/20 21:30	0.3	↓-0.2	干潮
2/20 21:40	0.5	↑0.2
2/20 21:50	1.1	↑0.6
2/20 22:00	2.0	↑0.9
2/20 22:10	3.2	↑1.2
2/20 22:20	4.7	↑1.5
2/20 22:30	6.6	↑1.9
2/20 22:40	8.7	↑2.1
2/20 22:50	11.2	↑2.5
2/20 23:00	13.9	↑2.7
2/20 23:10	16.9	↑3.0
2/20 23:20	20.1	↑3.2
2/20 23:30	23.5	↑3.4
2/20 23:40	27.1	↑3.6
2/20 23:50	30.9	↑3.8