20 (月)	05:43	00:06	19:20	12:33
	172cm	78cm	158cm	-1cm
中潮 出 05:04 入 18:19 出 06:33 入 21:54 潮干狩り ◎ 10:17～14:51

第一海堡（千葉）2026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	77.2	↓-0.4	干潮
4/20 00:10	77.2	0
4/20 00:20	77.6	↑0.4
4/20 00:30	78.4	↑0.8
4/20 00:40	79.6	↑1.2
4/20 00:50	81.1	↑1.5
4/20 01:00	83.0	↑1.9
4/20 01:10	85.3	↑2.3
4/20 01:20	87.9	↑2.6
4/20 01:30	90.8	↑2.9
4/20 01:40	94.0	↑3.2
4/20 01:50	97.4	↑3.4
4/20 02:00	101.1	↑3.7
4/20 02:10	105.0	↑3.9
4/20 02:20	109.0	↑4.0
4/20 02:30	113.2	↑4.2
4/20 02:40	117.5	↑4.3
4/20 02:50	121.9	↑4.4
4/20 03:00	126.3	↑4.4
4/20 03:10	130.7	↑4.4
4/20 03:20	135.0	↑4.3
4/20 03:30	139.2	↑4.2
4/20 03:40	143.4	↑4.2
4/20 03:50	147.4	↑4.0
4/20 04:00	151.2	↑3.8
4/20 04:10	154.7	↑3.5
4/20 04:20	158.0	↑3.3
4/20 04:30	161.0	↑3.0
4/20 04:40	163.7	↑2.7
4/20 04:50	166.1	↑2.4
4/20 05:00	168.1	↑2.0
4/20 05:10	169.7	↑1.6
4/20 05:20	170.8	↑1.1
4/20 05:30	171.6	↑0.8
4/20 05:40	171.9	↑0.3	満潮
4/20 05:50	171.7	↓-0.2
4/20 06:00	171.1	↓-0.6
4/20 06:10	170.0	↓-1.1
4/20 06:20	168.5	↓-1.5
4/20 06:30	166.5	↓-2.0
4/20 06:40	164.0	↓-2.5
4/20 06:50	161.1	↓-2.9
4/20 07:00	157.8	↓-3.3
4/20 07:10	154.0	↓-3.8
4/20 07:20	149.8	↓-4.2
4/20 07:30	145.2	↓-4.6
4/20 07:40	140.3	↓-4.9
4/20 07:50	135.1	↓-5.2
4/20 08:00	129.5	↓-5.6
4/20 08:10	123.7	↓-5.8
4/20 08:20	117.7	↓-6.0
4/20 08:30	111.4	↓-6.3
4/20 08:40	105.0	↓-6.4
4/20 08:50	98.5	↓-6.5
4/20 09:00	91.9	↓-6.6
4/20 09:10	85.2	↓-6.7	最大潮位差
4/20 09:20	78.5	↓-6.7	最大潮位差
4/20 09:30	71.9	↓-6.6
4/20 09:40	65.3	↓-6.6
4/20 09:50	58.9	↓-6.4
4/20 10:00	52.6	↓-6.3
4/20 10:10	46.5	↓-6.1
4/20 10:20	40.6	↓-5.9
4/20 10:30	35.0	↓-5.6
4/20 10:40	29.7	↓-5.3
4/20 10:50	24.8	↓-4.9
4/20 11:00	20.2	↓-4.6
4/20 11:10	16.0	↓-4.2
4/20 11:20	12.2	↓-3.8
4/20 11:30	8.9	↓-3.3
4/20 11:40	6.0	↓-2.9
4/20 11:50	3.6	↓-2.4
4/20 12:00	1.7	↓-1.9
4/20 12:10	0.3	↓-1.4
4/20 12:20	-0.6	↓-0.9
4/20 12:30	-1.0	↓-0.4	干潮
4/20 12:40	-0.9	↑0.1
4/20 12:50	-0.2	↑0.7
4/20 13:00	0.9	↑1.1
4/20 13:10	2.6	↑1.7
4/20 13:20	4.7	↑2.1
4/20 13:30	7.3	↑2.6
4/20 13:40	10.4	↑3.1
4/20 13:50	13.8	↑3.4
4/20 14:00	17.7	↑3.9
4/20 14:10	22.0	↑4.3
4/20 14:20	26.6	↑4.6
4/20 14:30	31.5	↑4.9
4/20 14:40	36.7	↑5.2
4/20 14:50	42.2	↑5.5
4/20 15:00	47.8	↑5.6
4/20 15:10	53.7	↑5.9
4/20 15:20	59.7	↑6.0
4/20 15:30	65.8	↑6.1
4/20 15:40	71.9	↑6.1
4/20 15:50	78.1	↑6.2
4/20 16:00	84.2	↑6.1
4/20 16:10	90.4	↑6.2
4/20 16:20	96.4	↑6.0
4/20 16:30	102.3	↑5.9
4/20 16:40	108.0	↑5.7
4/20 16:50	113.5	↑5.5
4/20 17:00	118.9	↑5.4
4/20 17:10	123.9	↑5.0
4/20 17:20	128.7	↑4.8
4/20 17:30	133.2	↑4.5
4/20 17:40	137.3	↑4.1
4/20 17:50	141.1	↑3.8
4/20 18:00	144.5	↑3.4
4/20 18:10	147.5	↑3.0
4/20 18:20	150.1	↑2.6
4/20 18:30	152.4	↑2.3
4/20 18:40	154.2	↑1.8
4/20 18:50	155.6	↑1.4
4/20 19:00	156.6	↑1.0
4/20 19:10	157.1	↑0.5	満潮
4/20 19:20	157.3	↑0.2	満潮
4/20 19:30	157.1	↓-0.2
4/20 19:40	156.5	↓-0.6
4/20 19:50	155.5	↓-1.0
4/20 20:00	154.2	↓-1.3
4/20 20:10	152.6	↓-1.6
4/20 20:20	150.7	↓-1.9
4/20 20:30	148.4	↓-2.3
4/20 20:40	146.0	↓-2.4
4/20 20:50	143.3	↓-2.7
4/20 21:00	140.4	↓-2.9
4/20 21:10	137.3	↓-3.1
4/20 21:20	134.1	↓-3.2
4/20 21:30	130.8	↓-3.3
4/20 21:40	127.4	↓-3.4
4/20 21:50	124.0	↓-3.4
4/20 22:00	120.6	↓-3.4
4/20 22:10	117.2	↓-3.4
4/20 22:20	113.8	↓-3.4
4/20 22:30	110.6	↓-3.2
4/20 22:40	107.5	↓-3.1
4/20 22:50	104.5	↓-3.0
4/20 23:00	101.7	↓-2.8
4/20 23:10	99.1	↓-2.6
4/20 23:20	96.7	↓-2.4
4/20 23:30	94.6	↓-2.1
4/20 23:40	92.8	↓-1.8
4/20 23:50	91.2	↓-1.6