20 (火)	03:59	10:25	16:47	22:27
	148cm	18cm	141cm	53cm
大潮 出 05:05 入 18:18 出 17:46 入 04:12 潮干狩り ◎ 08:45～12:06

館山（千葉）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	71.4	↑3.8
4/20 00:10	75.5	↑4.1
4/20 00:20	79.6	↑4.1
4/20 00:30	83.8	↑4.2
4/20 00:40	88.2	↑4.4
4/20 00:50	92.5	↑4.3
4/20 01:00	96.9	↑4.4
4/20 01:10	101.3	↑4.4
4/20 01:20	105.7	↑4.4
4/20 01:30	110.0	↑4.3
4/20 01:40	114.2	↑4.2
4/20 01:50	118.2	↑4.0
4/20 02:00	122.1	↑3.9
4/20 02:10	125.9	↑3.8
4/20 02:20	129.4	↑3.5
4/20 02:30	132.7	↑3.3
4/20 02:40	135.7	↑3.0
4/20 02:50	138.4	↑2.7
4/20 03:00	140.8	↑2.4
4/20 03:10	142.9	↑2.1
4/20 03:20	144.6	↑1.7
4/20 03:30	145.9	↑1.3
4/20 03:40	146.8	↑0.9
4/20 03:50	147.4	↑0.6	満潮
4/20 04:00	147.5	↑0.1
4/20 04:10	147.2	↓-0.3
4/20 04:20	146.5	↓-0.7
4/20 04:30	145.3	↓-1.2
4/20 04:40	143.8	↓-1.5
4/20 04:50	141.9	↓-1.9
4/20 05:00	139.6	↓-2.3
4/20 05:10	136.9	↓-2.7
4/20 05:20	133.9	↓-3.0
4/20 05:30	130.5	↓-3.4
4/20 05:40	126.9	↓-3.6
4/20 05:50	122.9	↓-4.0
4/20 06:00	118.7	↓-4.2
4/20 06:10	114.3	↓-4.4
4/20 06:20	109.6	↓-4.7
4/20 06:30	104.8	↓-4.8
4/20 06:40	99.9	↓-4.9
4/20 06:50	94.8	↓-5.1
4/20 07:00	89.6	↓-5.2
4/20 07:10	84.4	↓-5.2
4/20 07:20	79.1	↓-5.3	最大潮位差
4/20 07:30	73.9	↓-5.2
4/20 07:40	68.7	↓-5.2
4/20 07:50	63.6	↓-5.1
4/20 08:00	58.6	↓-5.0
4/20 08:10	53.7	↓-4.9
4/20 08:20	49.0	↓-4.7
4/20 08:30	44.5	↓-4.5
4/20 08:40	40.3	↓-4.2
4/20 08:50	36.4	↓-3.9
4/20 09:00	32.7	↓-3.7
4/20 09:10	29.4	↓-3.3
4/20 09:20	26.5	↓-2.9
4/20 09:30	24.0	↓-2.5
4/20 09:40	21.8	↓-2.2
4/20 09:50	20.1	↓-1.7
4/20 10:00	18.8	↓-1.3
4/20 10:10	18.0	↓-0.8
4/20 10:20	17.6	↓-0.4	干潮
4/20 10:30	17.6	0
4/20 10:40	18.1	↑0.5
4/20 10:50	19.0	↑0.9
4/20 11:00	20.4	↑1.4
4/20 11:10	22.1	↑1.7
4/20 11:20	24.3	↑2.2
4/20 11:30	26.8	↑2.5
4/20 11:40	29.7	↑2.9
4/20 11:50	32.9	↑3.2
4/20 12:00	36.4	↑3.5
4/20 12:10	40.2	↑3.8
4/20 12:20	44.2	↑4.0
4/20 12:30	48.5	↑4.3
4/20 12:40	52.9	↑4.4
4/20 12:50	57.6	↑4.7
4/20 13:00	62.3	↑4.7
4/20 13:10	67.2	↑4.9
4/20 13:20	72.1	↑4.9
4/20 13:30	77.1	↑5.0
4/20 13:40	82.1	↑5.0
4/20 13:50	87.1	↑5.0
4/20 14:00	92.1	↑5.0
4/20 14:10	97.0	↑4.9
4/20 14:20	101.7	↑4.7
4/20 14:30	106.3	↑4.6
4/20 14:40	110.8	↑4.5
4/20 14:50	115.0	↑4.2
4/20 15:00	119.0	↑4.0
4/20 15:10	122.8	↑3.8
4/20 15:20	126.2	↑3.4
4/20 15:30	129.3	↑3.1
4/20 15:40	132.1	↑2.8
4/20 15:50	134.5	↑2.4
4/20 16:00	136.6	↑2.1
4/20 16:10	138.3	↑1.7
4/20 16:20	139.5	↑1.2
4/20 16:30	140.4	↑0.9
4/20 16:40	140.9	↑0.5	満潮
4/20 16:50	140.9	0
4/20 17:00	140.6	↓-0.3
4/20 17:10	139.8	↓-0.8
4/20 17:20	138.7	↓-1.1
4/20 17:30	137.3	↓-1.4
4/20 17:40	135.5	↓-1.8
4/20 17:50	133.3	↓-2.2
4/20 18:00	130.9	↓-2.4
4/20 18:10	128.1	↓-2.8
4/20 18:20	125.2	↓-2.9
4/20 18:30	122.0	↓-3.2
4/20 18:40	118.5	↓-3.5
4/20 18:50	114.9	↓-3.6
4/20 19:00	111.2	↓-3.7
4/20 19:10	107.3	↓-3.9
4/20 19:20	103.4	↓-3.9
4/20 19:30	99.4	↓-4.0
4/20 19:40	95.4	↓-4.0
4/20 19:50	91.3	↓-4.1
4/20 20:00	87.4	↓-3.9
4/20 20:10	83.4	↓-4.0
4/20 20:20	79.6	↓-3.8
4/20 20:30	75.9	↓-3.7
4/20 20:40	72.4	↓-3.5
4/20 20:50	69.1	↓-3.3
4/20 21:00	66.1	↓-3.0
4/20 21:10	63.2	↓-2.9
4/20 21:20	60.7	↓-2.5
4/20 21:30	58.5	↓-2.2
4/20 21:40	56.6	↓-1.9
4/20 21:50	55.0	↓-1.6
4/20 22:00	53.8	↓-1.2
4/20 22:10	53.0	↓-0.8
4/20 22:20	52.6	↓-0.4	干潮
4/20 22:30	52.6	0
4/20 22:40	53.0	↑0.4
4/20 22:50	53.7	↑0.7
4/20 23:00	54.8	↑1.1
4/20 23:10	56.3	↑1.5
4/20 23:20	58.2	↑1.9
4/20 23:30	60.4	↑2.2
4/20 23:40	62.9	↑2.5
4/20 23:50	65.7	↑2.8