20 (土)	05:20	10:33	16:12	23:02
	115cm	61cm	122cm	-1cm
大潮 出 06:20 入 17:25 出 18:05 入 06:48

那珂湊（茨城）2038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	11.1	↑3.1
2/20 00:10	14.4	↑3.3
2/20 00:20	17.9	↑3.5
2/20 00:30	21.7	↑3.8
2/20 00:40	25.6	↑3.9
2/20 00:50	29.7	↑4.1
2/20 01:00	33.9	↑4.2
2/20 01:10	38.3	↑4.4
2/20 01:20	42.7	↑4.4
2/20 01:30	47.2	↑4.5
2/20 01:40	51.7	↑4.5
2/20 01:50	56.2	↑4.5
2/20 02:00	60.7	↑4.5
2/20 02:10	65.2	↑4.5
2/20 02:20	69.6	↑4.4
2/20 02:30	73.9	↑4.3
2/20 02:40	78.1	↑4.2
2/20 02:50	82.1	↑4.0
2/20 03:00	86.0	↑3.9
2/20 03:10	89.7	↑3.7
2/20 03:20	93.3	↑3.6
2/20 03:30	96.5	↑3.2
2/20 03:40	99.6	↑3.1
2/20 03:50	102.4	↑2.8
2/20 04:00	104.9	↑2.5
2/20 04:10	107.2	↑2.3
2/20 04:20	109.1	↑1.9
2/20 04:30	110.8	↑1.7
2/20 04:40	112.1	↑1.3
2/20 04:50	113.2	↑1.1
2/20 05:00	113.9	↑0.7
2/20 05:10	114.3	↑0.4	満潮
2/20 05:20	114.4	↑0.1	満潮
2/20 05:30	114.2	↓-0.2
2/20 05:40	113.7	↓-0.5
2/20 05:50	113.0	↓-0.7
2/20 06:00	111.9	↓-1.1
2/20 06:10	110.7	↓-1.2
2/20 06:20	109.1	↓-1.6
2/20 06:30	107.4	↓-1.7
2/20 06:40	105.4	↓-2.0
2/20 06:50	103.3	↓-2.1
2/20 07:00	101.0	↓-2.3
2/20 07:10	98.6	↓-2.4
2/20 07:20	96.1	↓-2.5
2/20 07:30	93.5	↓-2.6
2/20 07:40	90.9	↓-2.6
2/20 07:50	88.2	↓-2.7
2/20 08:00	85.5	↓-2.7
2/20 08:10	82.9	↓-2.6
2/20 08:20	80.3	↓-2.6
2/20 08:30	77.8	↓-2.5
2/20 08:40	75.4	↓-2.4
2/20 08:50	73.1	↓-2.3
2/20 09:00	70.9	↓-2.2
2/20 09:10	69.0	↓-1.9
2/20 09:20	67.2	↓-1.8
2/20 09:30	65.6	↓-1.6
2/20 09:40	64.2	↓-1.4
2/20 09:50	63.1	↓-1.1
2/20 10:00	62.2	↓-0.9
2/20 10:10	61.5	↓-0.7
2/20 10:20	61.1	↓-0.4
2/20 10:30	60.9	↓-0.2	干潮
2/20 10:40	61.0	↑0.1
2/20 10:50	61.3	↑0.3
2/20 11:00	61.9	↑0.6
2/20 11:10	62.7	↑0.8
2/20 11:20	63.8	↑1.1
2/20 11:30	65.1	↑1.3
2/20 11:40	66.6	↑1.5
2/20 11:50	68.3	↑1.7
2/20 12:00	70.2	↑1.9
2/20 12:10	72.3	↑2.1
2/20 12:20	74.5	↑2.2
2/20 12:30	76.9	↑2.4
2/20 12:40	79.4	↑2.5
2/20 12:50	81.9	↑2.5
2/20 13:00	84.6	↑2.7
2/20 13:10	87.3	↑2.7
2/20 13:20	90.1	↑2.8
2/20 13:30	92.9	↑2.8
2/20 13:40	95.7	↑2.8
2/20 13:50	98.4	↑2.7
2/20 14:00	101.1	↑2.7
2/20 14:10	103.7	↑2.6
2/20 14:20	106.2	↑2.5
2/20 14:30	108.6	↑2.4
2/20 14:40	110.9	↑2.3
2/20 14:50	113.0	↑2.1
2/20 15:00	114.9	↑1.9
2/20 15:10	116.6	↑1.7
2/20 15:20	118.1	↑1.5
2/20 15:30	119.3	↑1.2
2/20 15:40	120.3	↑1.0
2/20 15:50	121.1	↑0.8
2/20 16:00	121.5	↑0.4
2/20 16:10	121.7	↑0.2	満潮
2/20 16:20	121.6	↓-0.1
2/20 16:30	121.1	↓-0.5
2/20 16:40	120.4	↓-0.7
2/20 16:50	119.3	↓-1.1
2/20 17:00	117.9	↓-1.4
2/20 17:10	116.2	↓-1.7
2/20 17:20	114.1	↓-2.1
2/20 17:30	111.8	↓-2.3
2/20 17:40	109.1	↓-2.7
2/20 17:50	106.2	↓-2.9
2/20 18:00	103.0	↓-3.2
2/20 18:10	99.5	↓-3.5
2/20 18:20	95.8	↓-3.7
2/20 18:30	91.9	↓-3.9
2/20 18:40	87.7	↓-4.2
2/20 18:50	83.4	↓-4.3
2/20 19:00	78.9	↓-4.5
2/20 19:10	74.3	↓-4.6
2/20 19:20	69.7	↓-4.6
2/20 19:30	64.9	↓-4.8	最大潮位差
2/20 19:40	60.1	↓-4.8	最大潮位差
2/20 19:50	55.3	↓-4.8	最大潮位差
2/20 20:00	50.5	↓-4.8	最大潮位差
2/20 20:10	45.7	↓-4.8	最大潮位差
2/20 20:20	41.1	↓-4.6
2/20 20:30	36.5	↓-4.6
2/20 20:40	32.1	↓-4.4
2/20 20:50	27.9	↓-4.2
2/20 21:00	23.9	↓-4.0
2/20 21:10	20.1	↓-3.8
2/20 21:20	16.5	↓-3.6
2/20 21:30	13.2	↓-3.3
2/20 21:40	10.2	↓-3.0
2/20 21:50	7.6	↓-2.6
2/20 22:00	5.2	↓-2.4
2/20 22:10	3.2	↓-2.0
2/20 22:20	1.5	↓-1.7
2/20 22:30	0.2	↓-1.3
2/20 22:40	-0.8	↓-1.0
2/20 22:50	-1.4	↓-0.6
2/20 23:00	-1.6	↓-0.2	干潮
2/20 23:10	-1.5	↑0.1
2/20 23:20	-1.0	↑0.5
2/20 23:30	-0.1	↑0.9
2/20 23:40	1.1	↑1.2
2/20 23:50	2.6	↑1.5