20 (木)	04:43	10:03	15:45	22:26
	180cm	73cm	189cm	-1cm
大潮 出 06:19 入 17:25 出 04:53 入 15:56

千葉灯標（千葉）2031年02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
2/20 00:00	48.8	↑5.6
2/20 00:10	54.6	↑5.8
2/20 00:20	60.6	↑6.0
2/20 00:30	66.7	↑6.1
2/20 00:40	72.9	↑6.2
2/20 00:50	79.2	↑6.3
2/20 01:00	85.6	↑6.4
2/20 01:10	91.9	↑6.3
2/20 01:20	98.3	↑6.4
2/20 01:30	104.7	↑6.4
2/20 01:40	110.9	↑6.2
2/20 01:50	117.1	↑6.2
2/20 02:00	123.2	↑6.1
2/20 02:10	129.1	↑5.9
2/20 02:20	134.8	↑5.7
2/20 02:30	140.3	↑5.5
2/20 02:40	145.5	↑5.2
2/20 02:50	150.5	↑5.0
2/20 03:00	155.1	↑4.6
2/20 03:10	159.5	↑4.4
2/20 03:20	163.4	↑3.9
2/20 03:30	167.0	↑3.6
2/20 03:40	170.1	↑3.1
2/20 03:50	172.9	↑2.8
2/20 04:00	175.1	↑2.2
2/20 04:10	177.0	↑1.9
2/20 04:20	178.3	↑1.3
2/20 04:30	179.1	↑0.8
2/20 04:40	179.5	↑0.4	満潮
2/20 04:50	179.4	↓-0.1
2/20 05:00	178.7	↓-0.7
2/20 05:10	177.6	↓-1.1
2/20 05:20	176.1	↓-1.5
2/20 05:30	174.0	↓-2.1
2/20 05:40	171.5	↓-2.5
2/20 05:50	168.6	↓-2.9
2/20 06:00	165.3	↓-3.3
2/20 06:10	161.7	↓-3.6
2/20 06:20	157.7	↓-4.0
2/20 06:30	153.4	↓-4.3
2/20 06:40	148.8	↓-4.6
2/20 06:50	144.0	↓-4.8
2/20 07:00	139.1	↓-4.9
2/20 07:10	134.0	↓-5.1
2/20 07:20	128.8	↓-5.2
2/20 07:30	123.5	↓-5.3
2/20 07:40	118.3	↓-5.2
2/20 07:50	113.1	↓-5.2
2/20 08:00	108.1	↓-5.0
2/20 08:10	103.2	↓-4.9
2/20 08:20	98.5	↓-4.7
2/20 08:30	94.1	↓-4.4
2/20 08:40	90.0	↓-4.1
2/20 08:50	86.2	↓-3.8
2/20 09:00	82.9	↓-3.3
2/20 09:10	79.9	↓-3.0
2/20 09:20	77.5	↓-2.4
2/20 09:30	75.5	↓-2.0
2/20 09:40	74.0	↓-1.5
2/20 09:50	73.1	↓-0.9
2/20 10:00	72.7	↓-0.4	干潮
2/20 10:10	72.8	↑0.1
2/20 10:20	73.5	↑0.7
2/20 10:30	74.7	↑1.2
2/20 10:40	76.4	↑1.7
2/20 10:50	78.6	↑2.2
2/20 11:00	81.2	↑2.6
2/20 11:10	84.3	↑3.1
2/20 11:20	87.8	↑3.5
2/20 11:30	91.6	↑3.8
2/20 11:40	95.8	↑4.2
2/20 11:50	100.3	↑4.5
2/20 12:00	104.9	↑4.6
2/20 12:10	109.8	↑4.9
2/20 12:20	114.8	↑5.0
2/20 12:30	120.0	↑5.2
2/20 12:40	125.2	↑5.2
2/20 12:50	130.4	↑5.2
2/20 13:00	135.6	↑5.2
2/20 13:10	140.8	↑5.2
2/20 13:20	145.8	↑5.0
2/20 13:30	150.8	↑5.0
2/20 13:40	155.5	↑4.7
2/20 13:50	160.1	↑4.6
2/20 14:00	164.4	↑4.3
2/20 14:10	168.5	↑4.1
2/20 14:20	172.2	↑3.7
2/20 14:30	175.7	↑3.5
2/20 14:40	178.8	↑3.1
2/20 14:50	181.5	↑2.7
2/20 15:00	183.8	↑2.3
2/20 15:10	185.6	↑1.8
2/20 15:20	187.0	↑1.4
2/20 15:30	188.0	↑1.0
2/20 15:40	188.5	↑0.5	満潮
2/20 15:50	188.4	↓-0.1
2/20 16:00	187.9	↓-0.5
2/20 16:10	186.8	↓-1.1
2/20 16:20	185.3	↓-1.5
2/20 16:30	183.2	↓-2.1
2/20 16:40	180.6	↓-2.6
2/20 16:50	177.5	↓-3.1
2/20 17:00	173.9	↓-3.6
2/20 17:10	169.9	↓-4.0
2/20 17:20	165.4	↓-4.5
2/20 17:30	160.4	↓-5.0
2/20 17:40	155.1	↓-5.3
2/20 17:50	149.3	↓-5.8
2/20 18:00	143.3	↓-6.0
2/20 18:10	136.9	↓-6.4
2/20 18:20	130.2	↓-6.7
2/20 18:30	123.3	↓-6.9
2/20 18:40	116.2	↓-7.1
2/20 18:50	108.9	↓-7.3
2/20 19:00	101.5	↓-7.4
2/20 19:10	94.1	↓-7.4
2/20 19:20	86.6	↓-7.5	最大潮位差
2/20 19:30	79.1	↓-7.5	最大潮位差
2/20 19:40	71.7	↓-7.4
2/20 19:50	64.4	↓-7.3
2/20 20:00	57.3	↓-7.1
2/20 20:10	50.4	↓-6.9
2/20 20:20	43.7	↓-6.7
2/20 20:30	37.4	↓-6.3
2/20 20:40	31.4	↓-6.0
2/20 20:50	25.8	↓-5.6
2/20 21:00	20.7	↓-5.1
2/20 21:10	16.0	↓-4.7
2/20 21:20	11.8	↓-4.2
2/20 21:30	8.2	↓-3.6
2/20 21:40	5.1	↓-3.1
2/20 21:50	2.7	↓-2.4
2/20 22:00	0.8	↓-1.9
2/20 22:10	-0.5	↓-1.3
2/20 22:20	-1.1	↓-0.6	干潮
2/20 22:30	-1.1	0
2/20 22:40	-0.5	↑0.6
2/20 22:50	0.7	↑1.2
2/20 23:00	2.5	↑1.8
2/20 23:10	4.9	↑2.4
2/20 23:20	7.8	↑2.9
2/20 23:30	11.3	↑3.5
2/20 23:40	15.2	↑3.9
2/20 23:50	19.6	↑4.4