20 (月)	04:39	11:49	18:50	23:39
	138cm	-11cm	120cm	81cm
中潮 出 04:59 入 18:17 出 06:26 入 21:53 潮干狩り ◎ 09:13～14:26

大洗（茨城）2026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	75.5	↑1.2
4/20 00:10	76.9	↑1.4
4/20 00:20	78.7	↑1.8
4/20 00:30	80.6	↑1.9
4/20 00:40	82.7	↑2.1
4/20 00:50	85.1	↑2.4
4/20 01:00	87.6	↑2.5
4/20 01:10	90.3	↑2.7
4/20 01:20	93.1	↑2.8
4/20 01:30	96.0	↑2.9
4/20 01:40	99.0	↑3.0
4/20 01:50	102.1	↑3.1
4/20 02:00	105.2	↑3.1
4/20 02:10	108.4	↑3.2
4/20 02:20	111.5	↑3.1
4/20 02:30	114.5	↑3.0
4/20 02:40	117.5	↑3.0
4/20 02:50	120.3	↑2.8
4/20 03:00	123.1	↑2.8
4/20 03:10	125.6	↑2.5
4/20 03:20	128.0	↑2.4
4/20 03:30	130.1	↑2.1
4/20 03:40	132.0	↑1.9
4/20 03:50	133.6	↑1.6
4/20 04:00	135.0	↑1.4
4/20 04:10	136.1	↑1.1
4/20 04:20	136.8	↑0.7
4/20 04:30	137.3	↑0.5	満潮
4/20 04:40	137.4	↑0.1
4/20 04:50	137.1	↓-0.3
4/20 05:00	136.6	↓-0.5
4/20 05:10	135.6	↓-1.0
4/20 05:20	134.3	↓-1.3
4/20 05:30	132.7	↓-1.6
4/20 05:40	130.7	↓-2.0
4/20 05:50	128.4	↓-2.3
4/20 06:00	125.7	↓-2.7
4/20 06:10	122.7	↓-3.0
4/20 06:20	119.4	↓-3.3
4/20 06:30	115.8	↓-3.6
4/20 06:40	111.9	↓-3.9
4/20 06:50	107.7	↓-4.2
4/20 07:00	103.2	↓-4.5
4/20 07:10	98.6	↓-4.6
4/20 07:20	93.7	↓-4.9
4/20 07:30	88.7	↓-5.0
4/20 07:40	83.4	↓-5.3
4/20 07:50	78.1	↓-5.3
4/20 08:00	72.7	↓-5.4
4/20 08:10	67.2	↓-5.5	最大潮位差
4/20 08:20	61.7	↓-5.5	最大潮位差
4/20 08:30	56.2	↓-5.5	最大潮位差
4/20 08:40	50.7	↓-5.5	最大潮位差
4/20 08:50	45.3	↓-5.4
4/20 09:00	39.9	↓-5.4
4/20 09:10	34.7	↓-5.2
4/20 09:20	29.7	↓-5.0
4/20 09:30	24.8	↓-4.9
4/20 09:40	20.2	↓-4.6
4/20 09:50	15.8	↓-4.4
4/20 10:00	11.7	↓-4.1
4/20 10:10	7.8	↓-3.9
4/20 10:20	4.3	↓-3.5
4/20 10:30	1.1	↓-3.2
4/20 10:40	-1.7	↓-2.8
4/20 10:50	-4.2	↓-2.5
4/20 11:00	-6.4	↓-2.2
4/20 11:10	-8.1	↓-1.7
4/20 11:20	-9.4	↓-1.3
4/20 11:30	-10.4	↓-1.0
4/20 11:40	-10.9	↓-0.5	干潮
4/20 11:50	-11.0	↓-0.1
4/20 12:00	-10.7	↑0.3
4/20 12:10	-10.0	↑0.7
4/20 12:20	-8.9	↑1.1
4/20 12:30	-7.4	↑1.5
4/20 12:40	-5.6	↑1.8
4/20 12:50	-3.3	↑2.3
4/20 13:00	-0.7	↑2.6
4/20 13:10	2.3	↑3.0
4/20 13:20	5.5	↑3.2
4/20 13:30	9.1	↑3.6
4/20 13:40	13.0	↑3.9
4/20 13:50	17.1	↑4.1
4/20 14:00	21.4	↑4.3
4/20 14:10	25.9	↑4.5
4/20 14:20	30.6	↑4.7
4/20 14:30	35.4	↑4.8
4/20 14:40	40.3	↑4.9
4/20 14:50	45.3	↑5.0
4/20 15:00	50.3	↑5.0
4/20 15:10	55.3	↑5.0
4/20 15:20	60.3	↑5.0
4/20 15:30	65.2	↑4.9
4/20 15:40	70.0	↑4.8
4/20 15:50	74.7	↑4.7
4/20 16:00	79.3	↑4.6
4/20 16:10	83.7	↑4.4
4/20 16:20	87.9	↑4.2
4/20 16:30	91.9	↑4.0
4/20 16:40	95.7	↑3.8
4/20 16:50	99.2	↑3.5
4/20 17:00	102.5	↑3.3
4/20 17:10	105.5	↑3.0
4/20 17:20	108.2	↑2.7
4/20 17:30	110.6	↑2.4
4/20 17:40	112.8	↑2.2
4/20 17:50	114.6	↑1.8
4/20 18:00	116.2	↑1.6
4/20 18:10	117.4	↑1.2
4/20 18:20	118.4	↑1.0
4/20 18:30	119.1	↑0.7
4/20 18:40	119.4	↑0.3	満潮
4/20 18:50	119.5	↑0.1	満潮
4/20 19:00	119.4	↓-0.1
4/20 19:10	118.9	↓-0.5
4/20 19:20	118.3	↓-0.6
4/20 19:30	117.4	↓-0.9
4/20 19:40	116.2	↓-1.2
4/20 19:50	114.9	↓-1.3
4/20 20:00	113.5	↓-1.4
4/20 20:10	111.8	↓-1.7
4/20 20:20	110.1	↓-1.7
4/20 20:30	108.2	↓-1.9
4/20 20:40	106.2	↓-2.0
4/20 20:50	104.2	↓-2.0
4/20 21:00	102.2	↓-2.0
4/20 21:10	100.1	↓-2.1
4/20 21:20	98.0	↓-2.1
4/20 21:30	96.0	↓-2.0
4/20 21:40	94.1	↓-1.9
4/20 21:50	92.2	↓-1.9
4/20 22:00	90.4	↓-1.8
4/20 22:10	88.7	↓-1.7
4/20 22:20	87.1	↓-1.6
4/20 22:30	85.7	↓-1.4
4/20 22:40	84.5	↓-1.2
4/20 22:50	83.4	↓-1.1
4/20 23:00	82.5	↓-0.9
4/20 23:10	81.8	↓-0.7
4/20 23:20	81.3	↓-0.5
4/20 23:30	81.1	↓-0.2	干潮
4/20 23:40	81.0	↓-0.1
4/20 23:50	81.1	↑0.1