20 (水)	02:47	08:35	14:20	20:38
	113cm	55cm	107cm	34cm
中潮 出 04:59 入 18:17 出 03:42 入 15:12

大洗（茨城）2039年04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
4/20 00:00	84.3	↑3.0
4/20 00:10	87.2	↑2.9
4/20 00:20	90.0	↑2.8
4/20 00:30	92.7	↑2.7
4/20 00:40	95.3	↑2.6
4/20 00:50	97.8	↑2.5
4/20 01:00	100.1	↑2.3
4/20 01:10	102.2	↑2.1
4/20 01:20	104.2	↑2.0
4/20 01:30	106.0	↑1.8
4/20 01:40	107.6	↑1.6
4/20 01:50	108.9	↑1.3
4/20 02:00	110.1	↑1.2
4/20 02:10	111.1	↑1.0
4/20 02:20	111.8	↑0.7
4/20 02:30	112.3	↑0.5
4/20 02:40	112.5	↑0.2	満潮
4/20 02:50	112.6	↑0.1
4/20 03:00	112.3	↓-0.3
4/20 03:10	111.9	↓-0.4
4/20 03:20	111.2	↓-0.7
4/20 03:30	110.3	↓-0.9
4/20 03:40	109.1	↓-1.2
4/20 03:50	107.8	↓-1.3
4/20 04:00	106.2	↓-1.6
4/20 04:10	104.4	↓-1.8
4/20 04:20	102.5	↓-1.9
4/20 04:30	100.4	↓-2.1
4/20 04:40	98.2	↓-2.2
4/20 04:50	95.8	↓-2.4
4/20 05:00	93.4	↓-2.4
4/20 05:10	90.8	↓-2.6
4/20 05:20	88.3	↓-2.5
4/20 05:30	85.6	↓-2.7
4/20 05:40	83.0	↓-2.6
4/20 05:50	80.4	↓-2.6
4/20 06:00	77.8	↓-2.6
4/20 06:10	75.3	↓-2.5
4/20 06:20	72.8	↓-2.5
4/20 06:30	70.5	↓-2.3
4/20 06:40	68.2	↓-2.3
4/20 06:50	66.1	↓-2.1
4/20 07:00	64.1	↓-2.0
4/20 07:10	62.3	↓-1.8
4/20 07:20	60.7	↓-1.6
4/20 07:30	59.2	↓-1.5
4/20 07:40	57.9	↓-1.3
4/20 07:50	56.9	↓-1.0
4/20 08:00	56.0	↓-0.9
4/20 08:10	55.4	↓-0.6
4/20 08:20	54.9	↓-0.5
4/20 08:30	54.7	↓-0.2	干潮
4/20 08:40	54.7	0
4/20 08:50	55.0	↑0.3
4/20 09:00	55.4	↑0.4
4/20 09:10	56.1	↑0.7
4/20 09:20	57.0	↑0.9
4/20 09:30	58.0	↑1.0
4/20 09:40	59.3	↑1.3
4/20 09:50	60.8	↑1.5
4/20 10:00	62.4	↑1.6
4/20 10:10	64.1	↑1.7
4/20 10:20	66.1	↑2.0
4/20 10:30	68.1	↑2.0
4/20 10:40	70.2	↑2.1
4/20 10:50	72.5	↑2.3
4/20 11:00	74.7	↑2.2
4/20 11:10	77.1	↑2.4
4/20 11:20	79.4	↑2.3
4/20 11:30	81.8	↑2.4
4/20 11:40	84.2	↑2.4
4/20 11:50	86.5	↑2.3
4/20 12:00	88.8	↑2.3
4/20 12:10	91.0	↑2.2
4/20 12:20	93.1	↑2.1
4/20 12:30	95.1	↑2.0
4/20 12:40	97.0	↑1.9
4/20 12:50	98.8	↑1.8
4/20 13:00	100.4	↑1.6
4/20 13:10	101.9	↑1.5
4/20 13:20	103.2	↑1.3
4/20 13:30	104.3	↑1.1
4/20 13:40	105.2	↑0.9
4/20 13:50	105.9	↑0.7
4/20 14:00	106.5	↑0.6
4/20 14:10	106.8	↑0.3	満潮
4/20 14:20	106.9	↑0.1	満潮
4/20 14:30	106.7	↓-0.2
4/20 14:40	106.4	↓-0.3
4/20 14:50	105.8	↓-0.6
4/20 15:00	105.0	↓-0.8
4/20 15:10	104.0	↓-1.0
4/20 15:20	102.7	↓-1.3
4/20 15:30	101.2	↓-1.5
4/20 15:40	99.5	↓-1.7
4/20 15:50	97.6	↓-1.9
4/20 16:00	95.5	↓-2.1
4/20 16:10	93.3	↓-2.2
4/20 16:20	90.8	↓-2.5
4/20 16:30	88.2	↓-2.6
4/20 16:40	85.5	↓-2.7
4/20 16:50	82.7	↓-2.8
4/20 17:00	79.7	↓-3.0
4/20 17:10	76.7	↓-3.0
4/20 17:20	73.6	↓-3.1
4/20 17:30	70.5	↓-3.1
4/20 17:40	67.4	↓-3.1
4/20 17:50	64.3	↓-3.1
4/20 18:00	61.3	↓-3.0
4/20 18:10	58.3	↓-3.0
4/20 18:20	55.4	↓-2.9
4/20 18:30	52.6	↓-2.8
4/20 18:40	49.9	↓-2.7
4/20 18:50	47.4	↓-2.5
4/20 19:00	45.1	↓-2.3
4/20 19:10	42.9	↓-2.2
4/20 19:20	40.9	↓-2.0
4/20 19:30	39.2	↓-1.7
4/20 19:40	37.6	↓-1.6
4/20 19:50	36.3	↓-1.3
4/20 20:00	35.2	↓-1.1
4/20 20:10	34.4	↓-0.8
4/20 20:20	33.8	↓-0.6
4/20 20:30	33.5	↓-0.3	干潮
4/20 20:40	33.4	↓-0.1
4/20 20:50	33.7	↑0.3
4/20 21:00	34.1	↑0.4
4/20 21:10	34.9	↑0.8
4/20 21:20	35.9	↑1.0
4/20 21:30	37.1	↑1.2
4/20 21:40	38.6	↑1.5
4/20 21:50	40.4	↑1.8
4/20 22:00	42.4	↑2.0
4/20 22:10	44.6	↑2.2
4/20 22:20	46.9	↑2.3
4/20 22:30	49.5	↑2.6
4/20 22:40	52.3	↑2.8
4/20 22:50	55.2	↑2.9
4/20 23:00	58.2	↑3.0
4/20 23:10	61.4	↑3.2
4/20 23:20	64.6	↑3.2
4/20 23:30	67.9	↑3.3
4/20 23:40	71.2	↑3.3
4/20 23:50	74.6	↑3.4	最大潮位差