20 (火)	05:03	11:24	17:46	23:34
	161cm	16cm	158cm	50cm
大潮 出 05:04 入 18:18 出 19:17 入 05:43 潮干狩り ◎ 09:46～13:03

館山（千葉）2038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	45.9	↑2.6
4/20 00:10	48.9	↑3.0
4/20 00:20	52.2	↑3.3
4/20 00:30	55.9	↑3.7
4/20 00:40	59.8	↑3.9
4/20 00:50	64.1	↑4.3
4/20 01:00	68.6	↑4.5
4/20 01:10	73.3	↑4.7
4/20 01:20	78.1	↑4.8
4/20 01:30	83.1	↑5.0
4/20 01:40	88.3	↑5.2
4/20 01:50	93.5	↑5.2
4/20 02:00	98.7	↑5.2
4/20 02:10	103.9	↑5.2
4/20 02:20	109.1	↑5.2
4/20 02:30	114.3	↑5.2
4/20 02:40	119.3	↑5.0
4/20 02:50	124.2	↑4.9
4/20 03:00	128.9	↑4.7
4/20 03:10	133.4	↑4.5
4/20 03:20	137.6	↑4.2
4/20 03:30	141.6	↑4.0
4/20 03:40	145.3	↑3.7
4/20 03:50	148.6	↑3.3
4/20 04:00	151.6	↑3.0
4/20 04:10	154.2	↑2.6
4/20 04:20	156.3	↑2.1
4/20 04:30	158.1	↑1.8
4/20 04:40	159.3	↑1.2
4/20 04:50	160.1	↑0.8
4/20 05:00	160.5	↑0.4	満潮
4/20 05:10	160.3	↓-0.2
4/20 05:20	159.7	↓-0.6
4/20 05:30	158.6	↓-1.1
4/20 05:40	157.0	↓-1.6
4/20 05:50	154.9	↓-2.1
4/20 06:00	152.4	↓-2.5
4/20 06:10	149.5	↓-2.9
4/20 06:20	146.2	↓-3.3
4/20 06:30	142.4	↓-3.8
4/20 06:40	138.3	↓-4.1
4/20 06:50	133.9	↓-4.4
4/20 07:00	129.2	↓-4.7
4/20 07:10	124.2	↓-5.0
4/20 07:20	118.9	↓-5.3
4/20 07:30	113.5	↓-5.4
4/20 07:40	107.8	↓-5.7
4/20 07:50	102.1	↓-5.7
4/20 08:00	96.2	↓-5.9	最大潮位差
4/20 08:10	90.3	↓-5.9	最大潮位差
4/20 08:20	84.4	↓-5.9	最大潮位差
4/20 08:30	78.5	↓-5.9	最大潮位差
4/20 08:40	72.6	↓-5.9	最大潮位差
4/20 08:50	66.9	↓-5.7
4/20 09:00	61.3	↓-5.6
4/20 09:10	55.8	↓-5.5
4/20 09:20	50.6	↓-5.2
4/20 09:30	45.6	↓-5.0
4/20 09:40	40.9	↓-4.7
4/20 09:50	36.5	↓-4.4
4/20 10:00	32.5	↓-4.0
4/20 10:10	28.8	↓-3.7
4/20 10:20	25.6	↓-3.2
4/20 10:30	22.8	↓-2.8
4/20 10:40	20.4	↓-2.4
4/20 10:50	18.5	↓-1.9
4/20 11:00	17.1	↓-1.4
4/20 11:10	16.2	↓-0.9
4/20 11:20	15.8	↓-0.4	干潮
4/20 11:30	15.9	↑0.1
4/20 11:40	16.5	↑0.6
4/20 11:50	17.6	↑1.1
4/20 12:00	19.1	↑1.5
4/20 12:10	21.2	↑2.1
4/20 12:20	23.6	↑2.4
4/20 12:30	26.5	↑2.9
4/20 12:40	29.9	↑3.4
4/20 12:50	33.5	↑3.6
4/20 13:00	37.6	↑4.1
4/20 13:10	41.9	↑4.3
4/20 13:20	46.6	↑4.7
4/20 13:30	51.5	↑4.9
4/20 13:40	56.6	↑5.1
4/20 13:50	62.0	↑5.4
4/20 14:00	67.4	↑5.4
4/20 14:10	73.1	↑5.7
4/20 14:20	78.7	↑5.6
4/20 14:30	84.5	↑5.8
4/20 14:40	90.2	↑5.7
4/20 14:50	96.0	↑5.8
4/20 15:00	101.7	↑5.7
4/20 15:10	107.2	↑5.5
4/20 15:20	112.7	↑5.5
4/20 15:30	117.9	↑5.2
4/20 15:40	123.0	↑5.1
4/20 15:50	127.8	↑4.8
4/20 16:00	132.4	↑4.6
4/20 16:10	136.6	↑4.2
4/20 16:20	140.5	↑3.9
4/20 16:30	144.1	↑3.6
4/20 16:40	147.2	↑3.1
4/20 16:50	149.9	↑2.7
4/20 17:00	152.3	↑2.4
4/20 17:10	154.1	↑1.8
4/20 17:20	155.5	↑1.4
4/20 17:30	156.5	↑1.0
4/20 17:40	157.0	↑0.5	満潮
4/20 17:50	157.0	0
4/20 18:00	156.5	↓-0.5
4/20 18:10	155.6	↓-0.9
4/20 18:20	154.3	↓-1.3
4/20 18:30	152.5	↓-1.8
4/20 18:40	150.3	↓-2.2
4/20 18:50	147.8	↓-2.5
4/20 19:00	144.9	↓-2.9
4/20 19:10	141.6	↓-3.3
4/20 19:20	138.0	↓-3.6
4/20 19:30	134.2	↓-3.8
4/20 19:40	130.1	↓-4.1
4/20 19:50	125.8	↓-4.3
4/20 20:00	121.4	↓-4.4
4/20 20:10	116.7	↓-4.7
4/20 20:20	112.0	↓-4.7
4/20 20:30	107.2	↓-4.8
4/20 20:40	102.4	↓-4.8
4/20 20:50	97.6	↓-4.8
4/20 21:00	92.8	↓-4.8
4/20 21:10	88.1	↓-4.7
4/20 21:20	83.5	↓-4.6
4/20 21:30	79.1	↓-4.4
4/20 21:40	74.9	↓-4.2
4/20 21:50	70.9	↓-4.0
4/20 22:00	67.1	↓-3.8
4/20 22:10	63.6	↓-3.5
4/20 22:20	60.5	↓-3.1
4/20 22:30	57.7	↓-2.8
4/20 22:40	55.3	↓-2.4
4/20 22:50	53.2	↓-2.1
4/20 23:00	51.6	↓-1.6
4/20 23:10	50.4	↓-1.2
4/20 23:20	49.6	↓-0.8
4/20 23:30	49.3	↓-0.3	干潮
4/20 23:40	49.4	↑0.1
4/20 23:50	49.9	↑0.5