20 (土)	05:26	12:08	18:49	-
	173cm	0cm	165cm	-
中潮 出 05:04 入 18:19 出 21:02 入 06:12 潮干狩り ◎ 09:56～14:21

第一海堡（千葉）2030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	69.3	↑0.4
4/20 00:10	70.2	↑0.9
4/20 00:20	71.5	↑1.3
4/20 00:30	73.2	↑1.7
4/20 00:40	75.3	↑2.1
4/20 00:50	77.7	↑2.4
4/20 01:00	80.6	↑2.9
4/20 01:10	83.7	↑3.1
4/20 01:20	87.2	↑3.5
4/20 01:30	90.9	↑3.7
4/20 01:40	94.9	↑4.0
4/20 01:50	99.1	↑4.2
4/20 02:00	103.5	↑4.4
4/20 02:10	108.1	↑4.6
4/20 02:20	112.8	↑4.7
4/20 02:30	117.5	↑4.7
4/20 02:40	122.3	↑4.8
4/20 02:50	127.0	↑4.7
4/20 03:00	131.7	↑4.7
4/20 03:10	136.4	↑4.7
4/20 03:20	140.9	↑4.5
4/20 03:30	145.2	↑4.3
4/20 03:40	149.4	↑4.2
4/20 03:50	153.3	↑3.9
4/20 04:00	156.9	↑3.6
4/20 04:10	160.3	↑3.4
4/20 04:20	163.3	↑3.0
4/20 04:30	165.9	↑2.6
4/20 04:40	168.2	↑2.3
4/20 04:50	170.0	↑1.8
4/20 05:00	171.4	↑1.4
4/20 05:10	172.3	↑0.9
4/20 05:20	172.8	↑0.5	満潮
4/20 05:30	172.8	0
4/20 05:40	172.3	↓-0.5
4/20 05:50	171.3	↓-1.0
4/20 06:00	169.9	↓-1.4
4/20 06:10	167.9	↓-2.0
4/20 06:20	165.5	↓-2.4
4/20 06:30	162.6	↓-2.9
4/20 06:40	159.2	↓-3.4
4/20 06:50	155.4	↓-3.8
4/20 07:00	151.1	↓-4.3
4/20 07:10	146.5	↓-4.6
4/20 07:20	141.5	↓-5.0
4/20 07:30	136.1	↓-5.4
4/20 07:40	130.4	↓-5.7
4/20 07:50	124.5	↓-5.9
4/20 08:00	118.3	↓-6.2
4/20 08:10	111.9	↓-6.4
4/20 08:20	105.3	↓-6.6
4/20 08:30	98.6	↓-6.7
4/20 08:40	91.8	↓-6.8	最大潮位差
4/20 08:50	85.0	↓-6.8	最大潮位差
4/20 09:00	78.2	↓-6.8	最大潮位差
4/20 09:10	71.4	↓-6.8	最大潮位差
4/20 09:20	64.7	↓-6.7
4/20 09:30	58.1	↓-6.6
4/20 09:40	51.7	↓-6.4
4/20 09:50	45.5	↓-6.2
4/20 10:00	39.6	↓-5.9
4/20 10:10	33.9	↓-5.7
4/20 10:20	28.6	↓-5.3
4/20 10:30	23.6	↓-5.0
4/20 10:40	19.0	↓-4.6
4/20 10:50	14.8	↓-4.2
4/20 11:00	11.1	↓-3.7
4/20 11:10	7.9	↓-3.2
4/20 11:20	5.1	↓-2.8
4/20 11:30	2.9	↓-2.2
4/20 11:40	1.1	↓-1.8
4/20 11:50	-0.1	↓-1.2
4/20 12:00	-0.7	↓-0.6	干潮
4/20 12:10	-0.9	↓-0.2
4/20 12:20	-0.5	↑0.4
4/20 12:30	0.5	↑1.0
4/20 12:40	2.0	↑1.5
4/20 12:50	4.0	↑2.0
4/20 13:00	6.5	↑2.5
4/20 13:10	9.5	↑3.0
4/20 13:20	12.9	↑3.4
4/20 13:30	16.8	↑3.9
4/20 13:40	21.1	↑4.3
4/20 13:50	25.8	↑4.7
4/20 14:00	30.9	↑5.1
4/20 14:10	36.2	↑5.3
4/20 14:20	41.9	↑5.7
4/20 14:30	47.8	↑5.9
4/20 14:40	53.9	↑6.1
4/20 14:50	60.2	↑6.3
4/20 15:00	66.6	↑6.4
4/20 15:10	73.1	↑6.5
4/20 15:20	79.6	↑6.5
4/20 15:30	86.2	↑6.6
4/20 15:40	92.7	↑6.5
4/20 15:50	99.1	↑6.4
4/20 16:00	105.4	↑6.3
4/20 16:10	111.5	↑6.1
4/20 16:20	117.5	↑6.0
4/20 16:30	123.2	↑5.7
4/20 16:40	128.6	↑5.4
4/20 16:50	133.8	↑5.2
4/20 17:00	138.6	↑4.8
4/20 17:10	143.1	↑4.5
4/20 17:20	147.1	↑4.0
4/20 17:30	150.8	↑3.7
4/20 17:40	154.1	↑3.3
4/20 17:50	157.0	↑2.9
4/20 18:00	159.4	↑2.4
4/20 18:10	161.3	↑1.9
4/20 18:20	162.8	↑1.5
4/20 18:30	163.8	↑1.0
4/20 18:40	164.4	↑0.6	満潮
4/20 18:50	164.5	↑0.1
4/20 19:00	164.2	↓-0.3
4/20 19:10	163.5	↓-0.7
4/20 19:20	162.3	↓-1.2
4/20 19:30	160.8	↓-1.5
4/20 19:40	158.8	↓-2.0
4/20 19:50	156.5	↓-2.3
4/20 20:00	153.9	↓-2.6
4/20 20:10	151.0	↓-2.9
4/20 20:20	147.8	↓-3.2
4/20 20:30	144.3	↓-3.5
4/20 20:40	140.7	↓-3.6
4/20 20:50	136.9	↓-3.8
4/20 21:00	132.9	↓-4.0
4/20 21:10	128.9	↓-4.0
4/20 21:20	124.7	↓-4.2
4/20 21:30	120.6	↓-4.1
4/20 21:40	116.4	↓-4.2
4/20 21:50	112.3	↓-4.1
4/20 22:00	108.3	↓-4.0
4/20 22:10	104.4	↓-3.9
4/20 22:20	100.7	↓-3.7
4/20 22:30	97.1	↓-3.6
4/20 22:40	93.8	↓-3.3
4/20 22:50	90.7	↓-3.1
4/20 23:00	87.8	↓-2.9
4/20 23:10	85.3	↓-2.5
4/20 23:20	83.1	↓-2.2
4/20 23:30	81.2	↓-1.9
4/20 23:40	79.6	↓-1.6
4/20 23:50	78.5	↓-1.1