20 (木)	05:04	10:06	15:36	22:37
	115cm	69cm	123cm	-6cm
大潮 出 06:20 入 17:25 出 06:31 入 17:14

那珂湊（茨城）2042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	16.4	↑3.7
2/20 00:10	20.3	↑3.9
2/20 00:20	24.3	↑4.0
2/20 00:30	28.5	↑4.2
2/20 00:40	32.8	↑4.3
2/20 00:50	37.2	↑4.4
2/20 01:00	41.7	↑4.5
2/20 01:10	46.2	↑4.5
2/20 01:20	50.8	↑4.6
2/20 01:30	55.4	↑4.6
2/20 01:40	59.9	↑4.5
2/20 01:50	64.4	↑4.5
2/20 02:00	68.8	↑4.4
2/20 02:10	73.1	↑4.3
2/20 02:20	77.3	↑4.2
2/20 02:30	81.4	↑4.1
2/20 02:40	85.3	↑3.9
2/20 02:50	89.0	↑3.7
2/20 03:00	92.5	↑3.5
2/20 03:10	95.7	↑3.2
2/20 03:20	98.8	↑3.1
2/20 03:30	101.6	↑2.8
2/20 03:40	104.1	↑2.5
2/20 03:50	106.4	↑2.3
2/20 04:00	108.3	↑1.9
2/20 04:10	110.0	↑1.7
2/20 04:20	111.4	↑1.4
2/20 04:30	112.5	↑1.1
2/20 04:40	113.3	↑0.8
2/20 04:50	113.8	↑0.5
2/20 05:00	114.0	↑0.2	満潮
2/20 05:10	114.0	0
2/20 05:20	113.6	↓-0.4
2/20 05:30	113.0	↓-0.6
2/20 05:40	112.2	↓-0.8
2/20 05:50	111.1	↓-1.1
2/20 06:00	109.7	↓-1.4
2/20 06:10	108.2	↓-1.5
2/20 06:20	106.5	↓-1.7
2/20 06:30	104.7	↓-1.8
2/20 06:40	102.6	↓-2.1
2/20 06:50	100.5	↓-2.1
2/20 07:00	98.3	↓-2.2
2/20 07:10	96.0	↓-2.3
2/20 07:20	93.7	↓-2.3
2/20 07:30	91.3	↓-2.4
2/20 07:40	89.0	↓-2.3
2/20 07:50	86.7	↓-2.3
2/20 08:00	84.4	↓-2.3
2/20 08:10	82.2	↓-2.2
2/20 08:20	80.1	↓-2.1
2/20 08:30	78.1	↓-2.0
2/20 08:40	76.3	↓-1.8
2/20 08:50	74.6	↓-1.7
2/20 09:00	73.1	↓-1.5
2/20 09:10	71.8	↓-1.3
2/20 09:20	70.7	↓-1.1
2/20 09:30	69.8	↓-0.9
2/20 09:40	69.1	↓-0.7
2/20 09:50	68.6	↓-0.5
2/20 10:00	68.4	↓-0.2	干潮
2/20 10:10	68.4	0
2/20 10:20	68.6	↑0.2
2/20 10:30	69.1	↑0.5
2/20 10:40	69.7	↑0.6
2/20 10:50	70.6	↑0.9
2/20 11:00	71.8	↑1.2
2/20 11:10	73.1	↑1.3
2/20 11:20	74.6	↑1.5
2/20 11:30	76.3	↑1.7
2/20 11:40	78.1	↑1.8
2/20 11:50	80.1	↑2.0
2/20 12:00	82.3	↑2.2
2/20 12:10	84.5	↑2.2
2/20 12:20	86.9	↑2.4
2/20 12:30	89.3	↑2.4
2/20 12:40	91.8	↑2.5
2/20 12:50	94.3	↑2.5
2/20 13:00	96.9	↑2.6
2/20 13:10	99.4	↑2.5
2/20 13:20	101.9	↑2.5
2/20 13:30	104.3	↑2.4
2/20 13:40	106.7	↑2.4
2/20 13:50	109.0	↑2.3
2/20 14:00	111.2	↑2.2
2/20 14:10	113.2	↑2.0
2/20 14:20	115.1	↑1.9
2/20 14:30	116.8	↑1.7
2/20 14:40	118.3	↑1.5
2/20 14:50	119.5	↑1.2
2/20 15:00	120.6	↑1.1
2/20 15:10	121.4	↑0.8
2/20 15:20	121.9	↑0.5
2/20 15:30	122.2	↑0.3	満潮
2/20 15:40	122.2	0
2/20 15:50	121.9	↓-0.3
2/20 16:00	121.3	↓-0.6
2/20 16:10	120.4	↓-0.9
2/20 16:20	119.1	↓-1.3
2/20 16:30	117.6	↓-1.5
2/20 16:40	115.8	↓-1.8
2/20 16:50	113.6	↓-2.2
2/20 17:00	111.1	↓-2.5
2/20 17:10	108.4	↓-2.7
2/20 17:20	105.4	↓-3.0
2/20 17:30	102.1	↓-3.3
2/20 17:40	98.5	↓-3.6
2/20 17:50	94.7	↓-3.8
2/20 18:00	90.7	↓-4.0
2/20 18:10	86.4	↓-4.3
2/20 18:20	82.0	↓-4.4
2/20 18:30	77.5	↓-4.5
2/20 18:40	72.8	↓-4.7
2/20 18:50	68.0	↓-4.8
2/20 19:00	63.1	↓-4.9	最大潮位差
2/20 19:10	58.2	↓-4.9	最大潮位差
2/20 19:20	53.3	↓-4.9	最大潮位差
2/20 19:30	48.4	↓-4.9	最大潮位差
2/20 19:40	43.6	↓-4.8
2/20 19:50	38.8	↓-4.8
2/20 20:00	34.1	↓-4.7
2/20 20:10	29.6	↓-4.5
2/20 20:20	25.2	↓-4.4
2/20 20:30	21.0	↓-4.2
2/20 20:40	17.1	↓-3.9
2/20 20:50	13.3	↓-3.8
2/20 21:00	9.9	↓-3.4
2/20 21:10	6.7	↓-3.2
2/20 21:20	3.8	↓-2.9
2/20 21:30	1.3	↓-2.5
2/20 21:40	-1.0	↓-2.3
2/20 21:50	-2.8	↓-1.8
2/20 22:00	-4.4	↓-1.6
2/20 22:10	-5.5	↓-1.1
2/20 22:20	-6.3	↓-0.8
2/20 22:30	-6.7	↓-0.4	干潮
2/20 22:40	-6.8	↓-0.1
2/20 22:50	-6.4	↑0.4
2/20 23:00	-5.7	↑0.7
2/20 23:10	-4.7	↑1.0
2/20 23:20	-3.3	↑1.4
2/20 23:30	-1.6	↑1.7
2/20 23:40	0.5	↑2.1
2/20 23:50	2.9	↑2.4