20 (水)	06:21	00:05	18:25	12:23
	171cm	18cm	168cm	37cm
中潮 出 06:23 入 17:29 出 19:49 入 07:02 潮干狩り ○ 11:35～13:10

第一海堡（千葉）2030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	17.7	↓-0.5	干潮
2/20 00:10	17.8	↑0.1
2/20 00:20	18.4	↑0.6
2/20 00:30	19.5	↑1.1
2/20 00:40	21.2	↑1.7
2/20 00:50	23.3	↑2.1
2/20 01:00	26.0	↑2.7
2/20 01:10	29.1	↑3.1
2/20 01:20	32.7	↑3.6
2/20 01:30	36.7	↑4.0
2/20 01:40	41.1	↑4.4
2/20 01:50	45.9	↑4.8
2/20 02:00	51.0	↑5.1
2/20 02:10	56.5	↑5.5
2/20 02:20	62.2	↑5.7
2/20 02:30	68.1	↑5.9
2/20 02:40	74.2	↑6.1
2/20 02:50	80.4	↑6.2
2/20 03:00	86.7	↑6.3
2/20 03:10	93.1	↑6.4	最大潮位差
2/20 03:20	99.4	↑6.3
2/20 03:30	105.8	↑6.4	最大潮位差
2/20 03:40	112.0	↑6.2
2/20 03:50	118.1	↑6.1
2/20 04:00	124.1	↑6.0
2/20 04:10	129.8	↑5.7
2/20 04:20	135.3	↑5.5
2/20 04:30	140.5	↑5.2
2/20 04:40	145.4	↑4.9
2/20 04:50	149.9	↑4.5
2/20 05:00	154.0	↑4.1
2/20 05:10	157.7	↑3.7
2/20 05:20	161.0	↑3.3
2/20 05:30	163.8	↑2.8
2/20 05:40	166.1	↑2.3
2/20 05:50	167.9	↑1.8
2/20 06:00	169.2	↑1.3
2/20 06:10	170.0	↑0.8
2/20 06:20	170.3	↑0.3	満潮
2/20 06:30	170.1	↓-0.2
2/20 06:40	169.3	↓-0.8
2/20 06:50	168.1	↓-1.2
2/20 07:00	166.3	↓-1.8
2/20 07:10	164.1	↓-2.2
2/20 07:20	161.4	↓-2.7
2/20 07:30	158.3	↓-3.1
2/20 07:40	154.8	↓-3.5
2/20 07:50	150.8	↓-4.0
2/20 08:00	146.5	↓-4.3
2/20 08:10	141.9	↓-4.6
2/20 08:20	137.0	↓-4.9
2/20 08:30	131.9	↓-5.1
2/20 08:40	126.5	↓-5.4
2/20 08:50	121.0	↓-5.5
2/20 09:00	115.4	↓-5.6
2/20 09:10	109.6	↓-5.8
2/20 09:20	103.8	↓-5.8
2/20 09:30	98.1	↓-5.7
2/20 09:40	92.3	↓-5.8
2/20 09:50	86.7	↓-5.6
2/20 10:00	81.1	↓-5.6
2/20 10:10	75.8	↓-5.3
2/20 10:20	70.6	↓-5.2
2/20 10:30	65.8	↓-4.8
2/20 10:40	61.1	↓-4.7
2/20 10:50	56.9	↓-4.2
2/20 11:00	52.9	↓-4.0
2/20 11:10	49.4	↓-3.5
2/20 11:20	46.2	↓-3.2
2/20 11:30	43.5	↓-2.7
2/20 11:40	41.2	↓-2.3
2/20 11:50	39.4	↓-1.8
2/20 12:00	38.0	↓-1.4
2/20 12:10	37.2	↓-0.8
2/20 12:20	36.8	↓-0.4	干潮
2/20 12:30	37.0	↑0.2
2/20 12:40	37.6	↑0.6
2/20 12:50	38.7	↑1.1
2/20 13:00	40.3	↑1.6
2/20 13:10	42.4	↑2.1
2/20 13:20	44.9	↑2.5
2/20 13:30	47.9	↑3.0
2/20 13:40	51.3	↑3.4
2/20 13:50	55.0	↑3.7
2/20 14:00	59.1	↑4.1
2/20 14:10	63.5	↑4.4
2/20 14:20	68.3	↑4.8
2/20 14:30	73.2	↑4.9
2/20 14:40	78.4	↑5.2
2/20 14:50	83.8	↑5.4
2/20 15:00	89.3	↑5.5
2/20 15:10	95.0	↑5.7
2/20 15:20	100.6	↑5.6
2/20 15:30	106.3	↑5.7
2/20 15:40	112.0	↑5.7
2/20 15:50	117.6	↑5.6
2/20 16:00	123.0	↑5.4
2/20 16:10	128.3	↑5.3
2/20 16:20	133.5	↑5.2
2/20 16:30	138.3	↑4.8
2/20 16:40	142.9	↑4.6
2/20 16:50	147.3	↑4.4
2/20 17:00	151.2	↑3.9
2/20 17:10	154.8	↑3.6
2/20 17:20	158.0	↑3.2
2/20 17:30	160.8	↑2.8
2/20 17:40	163.2	↑2.4
2/20 17:50	165.1	↑1.9
2/20 18:00	166.5	↑1.4
2/20 18:10	167.4	↑0.9
2/20 18:20	167.8	↑0.4	満潮
2/20 18:30	167.8	0
2/20 18:40	167.2	↓-0.6
2/20 18:50	166.1	↓-1.1
2/20 19:00	164.6	↓-1.5
2/20 19:10	162.6	↓-2.0
2/20 19:20	160.1	↓-2.5
2/20 19:30	157.1	↓-3.0
2/20 19:40	153.8	↓-3.3
2/20 19:50	150.0	↓-3.8
2/20 20:00	145.9	↓-4.1
2/20 20:10	141.4	↓-4.5
2/20 20:20	136.6	↓-4.8
2/20 20:30	131.5	↓-5.1
2/20 20:40	126.2	↓-5.3
2/20 20:50	120.7	↓-5.5
2/20 21:00	115.0	↓-5.7
2/20 21:10	109.2	↓-5.8
2/20 21:20	103.3	↓-5.9
2/20 21:30	97.4	↓-5.9
2/20 21:40	91.5	↓-5.9
2/20 21:50	85.6	↓-5.9
2/20 22:00	79.8	↓-5.8
2/20 22:10	74.1	↓-5.7
2/20 22:20	68.7	↓-5.4
2/20 22:30	63.4	↓-5.3
2/20 22:40	58.4	↓-5.0
2/20 22:50	53.6	↓-4.8
2/20 23:00	49.2	↓-4.4
2/20 23:10	45.2	↓-4.0
2/20 23:20	41.5	↓-3.7
2/20 23:30	38.2	↓-3.3
2/20 23:40	35.4	↓-2.8
2/20 23:50	33.0	↓-2.4