20 (火)	05:04	11:25	17:48	23:39
	173cm	14cm	173cm	52cm
大潮 出 05:04 入 18:19 出 19:18 入 05:43 潮干狩り ◎ 09:39～13:11

第一海堡（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	50.7	↑2.3
4/20 00:10	53.4	↑2.7
4/20 00:20	56.6	↑3.2
4/20 00:30	60.1	↑3.5
4/20 00:40	64.0	↑3.9
4/20 00:50	68.3	↑4.3
4/20 01:00	72.8	↑4.5
4/20 01:10	77.6	↑4.8
4/20 01:20	82.7	↑5.1
4/20 01:30	88.0	↑5.3
4/20 01:40	93.4	↑5.4
4/20 01:50	98.9	↑5.5
4/20 02:00	104.5	↑5.6
4/20 02:10	110.1	↑5.6
4/20 02:20	115.8	↑5.7
4/20 02:30	121.3	↑5.5
4/20 02:40	126.8	↑5.5
4/20 02:50	132.1	↑5.3
4/20 03:00	137.3	↑5.2
4/20 03:10	142.2	↑4.9
4/20 03:20	146.9	↑4.7
4/20 03:30	151.2	↑4.3
4/20 03:40	155.3	↑4.1
4/20 03:50	158.9	↑3.6
4/20 04:00	162.2	↑3.3
4/20 04:10	165.0	↑2.8
4/20 04:20	167.4	↑2.4
4/20 04:30	169.4	↑2.0
4/20 04:40	170.8	↑1.4
4/20 04:50	171.7	↑0.9
4/20 05:00	172.2	↑0.5	満潮
4/20 05:10	172.1	↓-0.1
4/20 05:20	171.5	↓-0.6
4/20 05:30	170.4	↓-1.1
4/20 05:40	168.7	↓-1.7
4/20 05:50	166.6	↓-2.1
4/20 06:00	164.0	↓-2.6
4/20 06:10	160.9	↓-3.1
4/20 06:20	157.3	↓-3.6
4/20 06:30	153.3	↓-4.0
4/20 06:40	148.9	↓-4.4
4/20 06:50	144.1	↓-4.8
4/20 07:00	138.9	↓-5.2
4/20 07:10	133.5	↓-5.4
4/20 07:20	127.7	↓-5.8
4/20 07:30	121.7	↓-6.0
4/20 07:40	115.5	↓-6.2
4/20 07:50	109.2	↓-6.3
4/20 08:00	102.7	↓-6.5
4/20 08:10	96.2	↓-6.5
4/20 08:20	89.6	↓-6.6	最大潮位差
4/20 08:30	83.1	↓-6.5
4/20 08:40	76.6	↓-6.5
4/20 08:50	70.3	↓-6.3
4/20 09:00	64.0	↓-6.3
4/20 09:10	58.0	↓-6.0
4/20 09:20	52.2	↓-5.8
4/20 09:30	46.7	↓-5.5
4/20 09:40	41.5	↓-5.2
4/20 09:50	36.7	↓-4.8
4/20 10:00	32.2	↓-4.5
4/20 10:10	28.2	↓-4.0
4/20 10:20	24.6	↓-3.6
4/20 10:30	21.5	↓-3.1
4/20 10:40	18.9	↓-2.6
4/20 10:50	16.8	↓-2.1
4/20 11:00	15.2	↓-1.6
4/20 11:10	14.1	↓-1.1
4/20 11:20	13.6	↓-0.5	干潮
4/20 11:30	13.6	0
4/20 11:40	14.2	↑0.6
4/20 11:50	15.3	↑1.1
4/20 12:00	17.0	↑1.7
4/20 12:10	19.1	↑2.1
4/20 12:20	21.8	↑2.7
4/20 12:30	25.0	↑3.2
4/20 12:40	28.6	↑3.6
4/20 12:50	32.7	↑4.1
4/20 13:00	37.2	↑4.5
4/20 13:10	42.1	↑4.9
4/20 13:20	47.3	↑5.2
4/20 13:30	52.9	↑5.6
4/20 13:40	58.7	↑5.8
4/20 13:50	64.7	↑6.0
4/20 14:00	71.0	↑6.3
4/20 14:10	77.3	↑6.3
4/20 14:20	83.8	↑6.5
4/20 14:30	90.4	↑6.6	最大潮位差
4/20 14:40	96.9	↑6.5
4/20 14:50	103.5	↑6.6	最大潮位差
4/20 15:00	109.9	↑6.4
4/20 15:10	116.3	↑6.4
4/20 15:20	122.4	↑6.1
4/20 15:30	128.4	↑6.0
4/20 15:40	134.1	↑5.7
4/20 15:50	139.6	↑5.5
4/20 16:00	144.7	↑5.1
4/20 16:10	149.5	↑4.8
4/20 16:20	153.9	↑4.4
4/20 16:30	157.9	↑4.0
4/20 16:40	161.5	↑3.6
4/20 16:50	164.6	↑3.1
4/20 17:00	167.2	↑2.6
4/20 17:10	169.4	↑2.2
4/20 17:20	171.0	↑1.6
4/20 17:30	172.1	↑1.1
4/20 17:40	172.8	↑0.7	満潮
4/20 17:50	172.9	↑0.1
4/20 18:00	172.5	↓-0.4
4/20 18:10	171.6	↓-0.9
4/20 18:20	170.2	↓-1.4
4/20 18:30	168.4	↓-1.8
4/20 18:40	166.0	↓-2.4
4/20 18:50	163.3	↓-2.7
4/20 19:00	160.1	↓-3.2
4/20 19:10	156.6	↓-3.5
4/20 19:20	152.7	↓-3.9
4/20 19:30	148.5	↓-4.2
4/20 19:40	144.0	↓-4.5
4/20 19:50	139.2	↓-4.8
4/20 20:00	134.2	↓-5.0
4/20 20:10	129.1	↓-5.1
4/20 20:20	123.9	↓-5.2
4/20 20:30	118.5	↓-5.4
4/20 20:40	113.1	↓-5.4
4/20 20:50	107.7	↓-5.4
4/20 21:00	102.4	↓-5.3
4/20 21:10	97.1	↓-5.3
4/20 21:20	91.9	↓-5.2
4/20 21:30	86.9	↓-5.0
4/20 21:40	82.2	↓-4.7
4/20 21:50	77.6	↓-4.6
4/20 22:00	73.4	↓-4.2
4/20 22:10	69.4	↓-4.0
4/20 22:20	65.8	↓-3.6
4/20 22:30	62.5	↓-3.3
4/20 22:40	59.7	↓-2.8
4/20 22:50	57.3	↓-2.4
4/20 23:00	55.2	↓-2.1
4/20 23:10	53.7	↓-1.5
4/20 23:20	52.6	↓-1.1
4/20 23:30	52.0	↓-0.6	干潮
4/20 23:40	51.8	↓-0.2
4/20 23:50	52.2	↑0.4