20 (日)	04:36	10:57	17:21	23:10
	170cm	16cm	172cm	54cm
大潮 出 05:04 入 18:19 出 05:00 入 18:34 潮干狩り ◎ 09:13～12:41

第一海堡（千葉）2042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	60.9	↑3.3
4/20 00:10	64.6	↑3.7
4/20 00:20	68.6	↑4.0
4/20 00:30	73.0	↑4.4
4/20 00:40	77.6	↑4.6
4/20 00:50	82.4	↑4.8
4/20 01:00	87.5	↑5.1
4/20 01:10	92.7	↑5.2
4/20 01:20	98.0	↑5.3
4/20 01:30	103.4	↑5.4
4/20 01:40	108.8	↑5.4
4/20 01:50	114.3	↑5.5
4/20 02:00	119.7	↑5.4
4/20 02:10	125.0	↑5.3
4/20 02:20	130.2	↑5.2
4/20 02:30	135.2	↑5.0
4/20 02:40	140.0	↑4.8
4/20 02:50	144.5	↑4.5
4/20 03:00	148.8	↑4.3
4/20 03:10	152.8	↑4.0
4/20 03:20	156.4	↑3.6
4/20 03:30	159.6	↑3.2
4/20 03:40	162.5	↑2.9
4/20 03:50	164.9	↑2.4
4/20 04:00	166.8	↑1.9
4/20 04:10	168.3	↑1.5
4/20 04:20	169.3	↑1.0
4/20 04:30	169.8	↑0.5	満潮
4/20 04:40	169.9	↑0.1
4/20 04:50	169.4	↓-0.5
4/20 05:00	168.4	↓-1.0
4/20 05:10	166.9	↓-1.5
4/20 05:20	164.9	↓-2.0
4/20 05:30	162.4	↓-2.5
4/20 05:40	159.5	↓-2.9
4/20 05:50	156.1	↓-3.4
4/20 06:00	152.2	↓-3.9
4/20 06:10	148.0	↓-4.2
4/20 06:20	143.4	↓-4.6
4/20 06:30	138.5	↓-4.9
4/20 06:40	133.2	↓-5.3
4/20 06:50	127.6	↓-5.6
4/20 07:00	121.8	↓-5.8
4/20 07:10	115.8	↓-6.0
4/20 07:20	109.7	↓-6.1
4/20 07:30	103.4	↓-6.3
4/20 07:40	97.0	↓-6.4
4/20 07:50	90.6	↓-6.4
4/20 08:00	84.3	↓-6.3
4/20 08:10	77.9	↓-6.4
4/20 08:20	71.7	↓-6.2
4/20 08:30	65.6	↓-6.1
4/20 08:40	59.7	↓-5.9
4/20 08:50	54.0	↓-5.7
4/20 09:00	48.5	↓-5.5
4/20 09:10	43.4	↓-5.1
4/20 09:20	38.6	↓-4.8
4/20 09:30	34.2	↓-4.4
4/20 09:40	30.2	↓-4.0
4/20 09:50	26.6	↓-3.6
4/20 10:00	23.4	↓-3.2
4/20 10:10	20.8	↓-2.6
4/20 10:20	18.6	↓-2.2
4/20 10:30	16.9	↓-1.7
4/20 10:40	15.8	↓-1.1
4/20 10:50	15.2	↓-0.6	干潮
4/20 11:00	15.1	↓-0.1
4/20 11:10	15.6	↑0.5
4/20 11:20	16.6	↑1.0
4/20 11:30	18.1	↑1.5
4/20 11:40	20.1	↑2.0
4/20 11:50	22.7	↑2.6
4/20 12:00	25.7	↑3.0
4/20 12:10	29.2	↑3.5
4/20 12:20	33.1	↑3.9
4/20 12:30	37.4	↑4.3
4/20 12:40	42.1	↑4.7
4/20 12:50	47.2	↑5.1
4/20 13:00	52.6	↑5.4
4/20 13:10	58.2	↑5.6
4/20 13:20	64.1	↑5.9
4/20 13:30	70.2	↑6.1
4/20 13:40	76.5	↑6.3
4/20 13:50	82.8	↑6.3
4/20 14:00	89.2	↑6.4
4/20 14:10	95.7	↑6.5	最大潮位差
4/20 14:20	102.1	↑6.4
4/20 14:30	108.5	↑6.4
4/20 14:40	114.7	↑6.2
4/20 14:50	120.9	↑6.2
4/20 15:00	126.8	↑5.9
4/20 15:10	132.5	↑5.7
4/20 15:20	137.9	↑5.4
4/20 15:30	143.0	↑5.1
4/20 15:40	147.8	↑4.8
4/20 15:50	152.2	↑4.4
4/20 16:00	156.3	↑4.1
4/20 16:10	159.9	↑3.6
4/20 16:20	163.0	↑3.1
4/20 16:30	165.7	↑2.7
4/20 16:40	168.0	↑2.3
4/20 16:50	169.7	↑1.7
4/20 17:00	170.9	↑1.2
4/20 17:10	171.7	↑0.8
4/20 17:20	171.9	↑0.2	満潮
4/20 17:30	171.6	↓-0.3
4/20 17:40	170.9	↓-0.7
4/20 17:50	169.6	↓-1.3
4/20 18:00	167.9	↓-1.7
4/20 18:10	165.8	↓-2.1
4/20 18:20	163.2	↓-2.6
4/20 18:30	160.2	↓-3.0
4/20 18:40	156.8	↓-3.4
4/20 18:50	153.0	↓-3.8
4/20 19:00	148.9	↓-4.1
4/20 19:10	144.6	↓-4.3
4/20 19:20	140.0	↓-4.6
4/20 19:30	135.2	↓-4.8
4/20 19:40	130.2	↓-5.0
4/20 19:50	125.0	↓-5.2
4/20 20:00	119.8	↓-5.2
4/20 20:10	114.5	↓-5.3
4/20 20:20	109.2	↓-5.3
4/20 20:30	104.0	↓-5.2
4/20 20:40	98.8	↓-5.2
4/20 20:50	93.7	↓-5.1
4/20 21:00	88.8	↓-4.9
4/20 21:10	84.1	↓-4.7
4/20 21:20	79.6	↓-4.5
4/20 21:30	75.4	↓-4.2
4/20 21:40	71.5	↓-3.9
4/20 21:50	67.9	↓-3.6
4/20 22:00	64.6	↓-3.3
4/20 22:10	61.8	↓-2.8
4/20 22:20	59.3	↓-2.5
4/20 22:30	57.3	↓-2.0
4/20 22:40	55.7	↓-1.6
4/20 22:50	54.6	↓-1.1
4/20 23:00	53.9	↓-0.7	干潮
4/20 23:10	53.7	↓-0.2	干潮
4/20 23:20	54.0	↑0.3
4/20 23:30	54.7	↑0.7
4/20 23:40	55.9	↑1.2
4/20 23:50	57.5	↑1.6