20 (木)	07:15	00:52	20:36	14:03
	111cm	54cm	86cm	32cm
小潮 出 06:21 入 17:24 出 09:13 入 23:42

那珂湊（茨城）2048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	56.1	↓-1.1
2/20 00:10	55.3	↓-0.8
2/20 00:20	54.6	↓-0.7
2/20 00:30	54.1	↓-0.5
2/20 00:40	53.8	↓-0.3
2/20 00:50	53.6	↓-0.2	干潮
2/20 01:00	53.7	↑0.1
2/20 01:10	54.0	↑0.3
2/20 01:20	54.4	↑0.4
2/20 01:30	55.1	↑0.7
2/20 01:40	55.9	↑0.8
2/20 01:50	56.9	↑1.0
2/20 02:00	58.0	↑1.1
2/20 02:10	59.3	↑1.3
2/20 02:20	60.8	↑1.5
2/20 02:30	62.3	↑1.5
2/20 02:40	64.1	↑1.8
2/20 02:50	65.9	↑1.8
2/20 03:00	67.8	↑1.9
2/20 03:10	69.9	↑2.1
2/20 03:20	72.0	↑2.1
2/20 03:30	74.1	↑2.1
2/20 03:40	76.4	↑2.3
2/20 03:50	78.6	↑2.2
2/20 04:00	80.9	↑2.3
2/20 04:10	83.2	↑2.3
2/20 04:20	85.5	↑2.3
2/20 04:30	87.8	↑2.3
2/20 04:40	90.0	↑2.2
2/20 04:50	92.3	↑2.3
2/20 05:00	94.4	↑2.1
2/20 05:10	96.5	↑2.1
2/20 05:20	98.5	↑2.0
2/20 05:30	100.3	↑1.8
2/20 05:40	102.1	↑1.8
2/20 05:50	103.7	↑1.6
2/20 06:00	105.2	↑1.5
2/20 06:10	106.6	↑1.4
2/20 06:20	107.7	↑1.1
2/20 06:30	108.7	↑1.0
2/20 06:40	109.6	↑0.9
2/20 06:50	110.2	↑0.6
2/20 07:00	110.6	↑0.4
2/20 07:10	110.8	↑0.2	満潮
2/20 07:20	110.7	↓-0.1
2/20 07:30	110.5	↓-0.2
2/20 07:40	110.0	↓-0.5
2/20 07:50	109.3	↓-0.7
2/20 08:00	108.4	↓-0.9
2/20 08:10	107.2	↓-1.2
2/20 08:20	105.8	↓-1.4
2/20 08:30	104.2	↓-1.6
2/20 08:40	102.4	↓-1.8
2/20 08:50	100.4	↓-2.0
2/20 09:00	98.2	↓-2.2
2/20 09:10	95.8	↓-2.4
2/20 09:20	93.3	↓-2.5
2/20 09:30	90.6	↓-2.7
2/20 09:40	87.8	↓-2.8
2/20 09:50	84.9	↓-2.9
2/20 10:00	81.9	↓-3.0
2/20 10:10	78.9	↓-3.0
2/20 10:20	75.8	↓-3.1
2/20 10:30	72.6	↓-3.2	最大潮位差
2/20 10:40	69.5	↓-3.1
2/20 10:50	66.3	↓-3.2	最大潮位差
2/20 11:00	63.3	↓-3.0
2/20 11:10	60.2	↓-3.1
2/20 11:20	57.3	↓-2.9
2/20 11:30	54.4	↓-2.9
2/20 11:40	51.6	↓-2.8
2/20 11:50	49.0	↓-2.6
2/20 12:00	46.5	↓-2.5
2/20 12:10	44.2	↓-2.3
2/20 12:20	42.1	↓-2.1
2/20 12:30	40.1	↓-2.0
2/20 12:40	38.3	↓-1.8
2/20 12:50	36.7	↓-1.6
2/20 13:00	35.3	↓-1.4
2/20 13:10	34.2	↓-1.1
2/20 13:20	33.2	↓-1.0
2/20 13:30	32.4	↓-0.8
2/20 13:40	31.9	↓-0.5
2/20 13:50	31.5	↓-0.4
2/20 14:00	31.4	↓-0.1	干潮
2/20 14:10	31.4	0
2/20 14:20	31.7	↑0.3
2/20 14:30	32.1	↑0.4
2/20 14:40	32.7	↑0.6
2/20 14:50	33.5	↑0.8
2/20 15:00	34.4	↑0.9
2/20 15:10	35.5	↑1.1
2/20 15:20	36.8	↑1.3
2/20 15:30	38.2	↑1.4
2/20 15:40	39.7	↑1.5
2/20 15:50	41.3	↑1.6
2/20 16:00	43.0	↑1.7
2/20 16:10	44.8	↑1.8
2/20 16:20	46.7	↑1.9
2/20 16:30	48.7	↑2.0
2/20 16:40	50.7	↑2.0
2/20 16:50	52.8	↑2.1
2/20 17:00	54.9	↑2.1
2/20 17:10	57.0	↑2.1
2/20 17:20	59.1	↑2.1
2/20 17:30	61.2	↑2.1
2/20 17:40	63.3	↑2.1
2/20 17:50	65.4	↑2.1
2/20 18:00	67.5	↑2.1
2/20 18:10	69.4	↑1.9
2/20 18:20	71.3	↑1.9
2/20 18:30	73.2	↑1.9
2/20 18:40	74.9	↑1.7
2/20 18:50	76.5	↑1.6
2/20 19:00	78.0	↑1.5
2/20 19:10	79.4	↑1.4
2/20 19:20	80.7	↑1.3
2/20 19:30	81.8	↑1.1
2/20 19:40	82.8	↑1.0
2/20 19:50	83.6	↑0.8
2/20 20:00	84.2	↑0.6
2/20 20:10	84.7	↑0.5
2/20 20:20	85.0	↑0.3
2/20 20:30	85.2	↑0.2	満潮
2/20 20:40	85.2	0
2/20 20:50	85.1	↓-0.1
2/20 21:00	84.7	↓-0.4
2/20 21:10	84.3	↓-0.4
2/20 21:20	83.7	↓-0.6
2/20 21:30	83.0	↓-0.7
2/20 21:40	82.1	↓-0.9
2/20 21:50	81.2	↓-0.9
2/20 22:00	80.1	↓-1.1
2/20 22:10	79.0	↓-1.1
2/20 22:20	77.8	↓-1.2
2/20 22:30	76.5	↓-1.3
2/20 22:40	75.3	↓-1.2
2/20 22:50	74.0	↓-1.3
2/20 23:00	72.7	↓-1.3
2/20 23:10	71.4	↓-1.3
2/20 23:20	70.2	↓-1.2
2/20 23:30	69.0	↓-1.2
2/20 23:40	67.9	↓-1.1
2/20 23:50	66.8	↓-1.1