20 (火)	03:03	09:37	16:11	21:44
	124cm	16cm	124cm	56cm
大潮 出 04:59 入 18:16 出 17:45 入 04:07 潮干狩り ◎ 07:52～11:20

大洗（茨城）2027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	83.0	↑3.4
4/20 00:10	86.5	↑3.5
4/20 00:20	89.9	↑3.4
4/20 00:30	93.3	↑3.4
4/20 00:40	96.6	↑3.3
4/20 00:50	99.8	↑3.2
4/20 01:00	102.9	↑3.1
4/20 01:10	105.8	↑2.9
4/20 01:20	108.6	↑2.8
4/20 01:30	111.2	↑2.6
4/20 01:40	113.5	↑2.3
4/20 01:50	115.7	↑2.2
4/20 02:00	117.6	↑1.9
4/20 02:10	119.3	↑1.7
4/20 02:20	120.7	↑1.4
4/20 02:30	121.8	↑1.1
4/20 02:40	122.6	↑0.8
4/20 02:50	123.1	↑0.5
4/20 03:00	123.4	↑0.3	満潮
4/20 03:10	123.3	↓-0.1
4/20 03:20	122.9	↓-0.4
4/20 03:30	122.2	↓-0.7
4/20 03:40	121.1	↓-1.1
4/20 03:50	119.8	↓-1.3
4/20 04:00	118.2	↓-1.6
4/20 04:10	116.2	↓-2.0
4/20 04:20	114.0	↓-2.2
4/20 04:30	111.5	↓-2.5
4/20 04:40	108.7	↓-2.8
4/20 04:50	105.6	↓-3.1
4/20 05:00	102.4	↓-3.2
4/20 05:10	98.8	↓-3.6
4/20 05:20	95.1	↓-3.7
4/20 05:30	91.3	↓-3.8
4/20 05:40	87.2	↓-4.1
4/20 05:50	83.1	↓-4.1
4/20 06:00	78.8	↓-4.3
4/20 06:10	74.5	↓-4.3
4/20 06:20	70.1	↓-4.4	最大潮位差
4/20 06:30	65.8	↓-4.3
4/20 06:40	61.4	↓-4.4	最大潮位差
4/20 06:50	57.1	↓-4.3
4/20 07:00	52.9	↓-4.2
4/20 07:10	48.8	↓-4.1
4/20 07:20	44.8	↓-4.0
4/20 07:30	41.0	↓-3.8
4/20 07:40	37.3	↓-3.7
4/20 07:50	33.9	↓-3.4
4/20 08:00	30.7	↓-3.2
4/20 08:10	27.8	↓-2.9
4/20 08:20	25.1	↓-2.7
4/20 08:30	22.7	↓-2.4
4/20 08:40	20.7	↓-2.0
4/20 08:50	18.9	↓-1.8
4/20 09:00	17.5	↓-1.4
4/20 09:10	16.4	↓-1.1
4/20 09:20	15.7	↓-0.7
4/20 09:30	15.3	↓-0.4	干潮
4/20 09:40	15.2	↓-0.1
4/20 09:50	15.6	↑0.4
4/20 10:00	16.2	↑0.6
4/20 10:10	17.3	↑1.1
4/20 10:20	18.6	↑1.3
4/20 10:30	20.3	↑1.7
4/20 10:40	22.4	↑2.1
4/20 10:50	24.7	↑2.3
4/20 11:00	27.4	↑2.7
4/20 11:10	30.3	↑2.9
4/20 11:20	33.5	↑3.2
4/20 11:30	36.9	↑3.4
4/20 11:40	40.5	↑3.6
4/20 11:50	44.3	↑3.8
4/20 12:00	48.3	↑4.0
4/20 12:10	52.4	↑4.1
4/20 12:20	56.6	↑4.2
4/20 12:30	60.9	↑4.3
4/20 12:40	65.3	↑4.4	最大潮位差
4/20 12:50	69.6	↑4.3
4/20 13:00	74.0	↑4.4	最大潮位差
4/20 13:10	78.3	↑4.3
4/20 13:20	82.5	↑4.2
4/20 13:30	86.6	↑4.1
4/20 13:40	90.6	↑4.0
4/20 13:50	94.5	↑3.9
4/20 14:00	98.2	↑3.7
4/20 14:10	101.7	↑3.5
4/20 14:20	105.0	↑3.3
4/20 14:30	108.1	↑3.1
4/20 14:40	110.9	↑2.8
4/20 14:50	113.5	↑2.6
4/20 15:00	115.8	↑2.3
4/20 15:10	117.8	↑2.0
4/20 15:20	119.5	↑1.7
4/20 15:30	121.0	↑1.5
4/20 15:40	122.1	↑1.1
4/20 15:50	122.9	↑0.8
4/20 16:00	123.3	↑0.4
4/20 16:10	123.5	↑0.2	満潮
4/20 16:20	123.3	↓-0.2
4/20 16:30	122.9	↓-0.4
4/20 16:40	122.1	↓-0.8
4/20 16:50	121.0	↓-1.1
4/20 17:00	119.7	↓-1.3
4/20 17:10	118.0	↓-1.7
4/20 17:20	116.1	↓-1.9
4/20 17:30	114.0	↓-2.1
4/20 17:40	111.6	↓-2.4
4/20 17:50	109.0	↓-2.6
4/20 18:00	106.3	↓-2.7
4/20 18:10	103.4	↓-2.9
4/20 18:20	100.4	↓-3.0
4/20 18:30	97.3	↓-3.1
4/20 18:40	94.1	↓-3.2
4/20 18:50	90.9	↓-3.2
4/20 19:00	87.6	↓-3.3
4/20 19:10	84.4	↓-3.2
4/20 19:20	81.3	↓-3.1
4/20 19:30	78.2	↓-3.1
4/20 19:40	75.2	↓-3.0
4/20 19:50	72.4	↓-2.8
4/20 20:00	69.7	↓-2.7
4/20 20:10	67.1	↓-2.6
4/20 20:20	64.8	↓-2.3
4/20 20:30	62.7	↓-2.1
4/20 20:40	60.8	↓-1.9
4/20 20:50	59.2	↓-1.6
4/20 21:00	57.8	↓-1.4
4/20 21:10	56.7	↓-1.1
4/20 21:20	55.9	↓-0.8
4/20 21:30	55.4	↓-0.5
4/20 21:40	55.2	↓-0.2	干潮
4/20 21:50	55.2	0
4/20 22:00	55.6	↑0.4
4/20 22:10	56.3	↑0.7
4/20 22:20	57.2	↑0.9
4/20 22:30	58.5	↑1.3
4/20 22:40	60.0	↑1.5
4/20 22:50	61.8	↑1.8
4/20 23:00	63.9	↑2.1
4/20 23:10	66.1	↑2.2
4/20 23:20	68.7	↑2.6
4/20 23:30	71.4	↑2.7
4/20 23:40	74.2	↑2.8
4/20 23:50	77.3	↑3.1