20 (火)	03:56	10:17	16:40	22:30
	165cm	23cm	167cm	56cm
大潮 出 05:04 入 18:19 出 17:47 入 04:11 潮干狩り ○ 08:45～11:49

第一海堡（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	80.3	↑4.3
4/20 00:10	84.7	↑4.4
4/20 00:20	89.4	↑4.7
4/20 00:30	94.2	↑4.8
4/20 00:40	99.0	↑4.8
4/20 00:50	104.0	↑5.0
4/20 01:00	109.0	↑5.0
4/20 01:10	114.0	↑5.0
4/20 01:20	118.9	↑4.9
4/20 01:30	123.8	↑4.9
4/20 01:40	128.5	↑4.7
4/20 01:50	133.1	↑4.6
4/20 02:00	137.5	↑4.4
4/20 02:10	141.6	↑4.1
4/20 02:20	145.6	↑4.0
4/20 02:30	149.2	↑3.6
4/20 02:40	152.5	↑3.3
4/20 02:50	155.4	↑2.9
4/20 03:00	158.0	↑2.6
4/20 03:10	160.2	↑2.2
4/20 03:20	161.9	↑1.7
4/20 03:30	163.3	↑1.4
4/20 03:40	164.2	↑0.9
4/20 03:50	164.7	↑0.5	満潮
4/20 04:00	164.7	0
4/20 04:10	164.2	↓-0.5
4/20 04:20	163.3	↓-0.9
4/20 04:30	161.9	↓-1.4
4/20 04:40	160.1	↓-1.8
4/20 04:50	157.8	↓-2.3
4/20 05:00	155.1	↓-2.7
4/20 05:10	152.0	↓-3.1
4/20 05:20	148.5	↓-3.5
4/20 05:30	144.6	↓-3.9
4/20 05:40	140.4	↓-4.2
4/20 05:50	135.9	↓-4.5
4/20 06:00	131.0	↓-4.9
4/20 06:10	126.0	↓-5.0
4/20 06:20	120.6	↓-5.4
4/20 06:30	115.2	↓-5.4
4/20 06:40	109.5	↓-5.7
4/20 06:50	103.8	↓-5.7
4/20 07:00	97.9	↓-5.9
4/20 07:10	92.1	↓-5.8
4/20 07:20	86.2	↓-5.9
4/20 07:30	80.4	↓-5.8
4/20 07:40	74.7	↓-5.7
4/20 07:50	69.1	↓-5.6
4/20 08:00	63.7	↓-5.4
4/20 08:10	58.5	↓-5.2
4/20 08:20	53.5	↓-5.0
4/20 08:30	48.8	↓-4.7
4/20 08:40	44.4	↓-4.4
4/20 08:50	40.3	↓-4.1
4/20 09:00	36.6	↓-3.7
4/20 09:10	33.3	↓-3.3
4/20 09:20	30.4	↓-2.9
4/20 09:30	28.0	↓-2.4
4/20 09:40	26.0	↓-2.0
4/20 09:50	24.4	↓-1.6
4/20 10:00	23.4	↓-1.0
4/20 10:10	22.8	↓-0.6	干潮
4/20 10:20	22.8	0
4/20 10:30	23.2	↑0.4
4/20 10:40	24.1	↑0.9
4/20 10:50	25.5	↑1.4
4/20 11:00	27.3	↑1.8
4/20 11:10	29.7	↑2.4
4/20 11:20	32.4	↑2.7
4/20 11:30	35.6	↑3.2
4/20 11:40	39.2	↑3.6
4/20 11:50	43.2	↑4.0
4/20 12:00	47.5	↑4.3
4/20 12:10	52.2	↑4.7
4/20 12:20	57.1	↑4.9
4/20 12:30	62.3	↑5.2
4/20 12:40	67.8	↑5.5
4/20 12:50	73.4	↑5.6
4/20 13:00	79.1	↑5.7
4/20 13:10	84.9	↑5.8
4/20 13:20	90.8	↑5.9
4/20 13:30	96.8	↑6.0	最大潮位差
4/20 13:40	102.7	↑5.9
4/20 13:50	108.5	↑5.8
4/20 14:00	114.3	↑5.8
4/20 14:10	119.9	↑5.6
4/20 14:20	125.4	↑5.5
4/20 14:30	130.6	↑5.2
4/20 14:40	135.6	↑5.0
4/20 14:50	140.3	↑4.7
4/20 15:00	144.7	↑4.4
4/20 15:10	148.7	↑4.0
4/20 15:20	152.4	↑3.7
4/20 15:30	155.7	↑3.3
4/20 15:40	158.6	↑2.9
4/20 15:50	161.1	↑2.5
4/20 16:00	163.1	↑2.0
4/20 16:10	164.7	↑1.6
4/20 16:20	165.8	↑1.1
4/20 16:30	166.4	↑0.6	満潮
4/20 16:40	166.6	↑0.2	満潮
4/20 16:50	166.3	↓-0.3
4/20 17:00	165.5	↓-0.8
4/20 17:10	164.3	↓-1.2
4/20 17:20	162.7	↓-1.6
4/20 17:30	160.6	↓-2.1
4/20 17:40	158.2	↓-2.4
4/20 17:50	155.3	↓-2.9
4/20 18:00	152.1	↓-3.2
4/20 18:10	148.6	↓-3.5
4/20 18:20	144.8	↓-3.8
4/20 18:30	140.7	↓-4.1
4/20 18:40	136.3	↓-4.4
4/20 18:50	131.8	↓-4.5
4/20 19:00	127.1	↓-4.7
4/20 19:10	122.3	↓-4.8
4/20 19:20	117.4	↓-4.9
4/20 19:30	112.4	↓-5.0
4/20 19:40	107.4	↓-5.0
4/20 19:50	102.5	↓-4.9
4/20 20:00	97.6	↓-4.9
4/20 20:10	92.8	↓-4.8
4/20 20:20	88.2	↓-4.6
4/20 20:30	83.8	↓-4.4
4/20 20:40	79.6	↓-4.2
4/20 20:50	75.6	↓-4.0
4/20 21:00	71.9	↓-3.7
4/20 21:10	68.5	↓-3.4
4/20 21:20	65.5	↓-3.0
4/20 21:30	62.8	↓-2.7
4/20 21:40	60.5	↓-2.3
4/20 21:50	58.6	↓-1.9
4/20 22:00	57.1	↓-1.5
4/20 22:10	56.0	↓-1.1
4/20 22:20	55.4	↓-0.6	干潮
4/20 22:30	55.2	↓-0.2	干潮
4/20 22:40	55.5	↑0.3
4/20 22:50	56.2	↑0.7
4/20 23:00	57.3	↑1.1
4/20 23:10	58.9	↑1.6
4/20 23:20	60.9	↑2.0
4/20 23:30	63.3	↑2.4
4/20 23:40	66.1	↑2.8
4/20 23:50	69.2	↑3.1