20 (日)	06:38	00:32	19:04	12:49
	165cm	42cm	171cm	34cm
大潮 出 06:19 入 19:12 出 05:04 入 17:56 潮干狩り ○ 11:52～13:45

黄尾嶼（沖縄）2031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	43.5	↓-1.6
4/20 00:10	42.3	↓-1.2
4/20 00:20	41.6	↓-0.7
4/20 00:30	41.3	↓-0.3	干潮
4/20 00:40	41.4	↑0.1
4/20 00:50	42.0	↑0.6
4/20 01:00	43.1	↑1.1
4/20 01:10	44.6	↑1.5
4/20 01:20	46.5	↑1.9
4/20 01:30	48.8	↑2.3
4/20 01:40	51.6	↑2.8
4/20 01:50	54.7	↑3.1
4/20 02:00	58.1	↑3.4
4/20 02:10	61.9	↑3.8
4/20 02:20	66.0	↑4.1
4/20 02:30	70.4	↑4.4
4/20 02:40	75.0	↑4.6
4/20 02:50	79.8	↑4.8
4/20 03:00	84.8	↑5.0
4/20 03:10	89.9	↑5.1
4/20 03:20	95.1	↑5.2
4/20 03:30	100.4	↑5.3
4/20 03:40	105.7	↑5.3
4/20 03:50	110.9	↑5.2
4/20 04:00	116.2	↑5.3
4/20 04:10	121.3	↑5.1
4/20 04:20	126.3	↑5.0
4/20 04:30	131.1	↑4.8
4/20 04:40	135.7	↑4.6
4/20 04:50	140.1	↑4.4
4/20 05:00	144.2	↑4.1
4/20 05:10	148.0	↑3.8
4/20 05:20	151.5	↑3.5
4/20 05:30	154.6	↑3.1
4/20 05:40	157.3	↑2.7
4/20 05:50	159.7	↑2.4
4/20 06:00	161.6	↑1.9
4/20 06:10	163.1	↑1.5
4/20 06:20	164.1	↑1.0
4/20 06:30	164.7	↑0.6	満潮
4/20 06:40	164.8	↑0.1
4/20 06:50	164.4	↓-0.4
4/20 07:00	163.6	↓-0.8
4/20 07:10	162.3	↓-1.3
4/20 07:20	160.6	↓-1.7
4/20 07:30	158.4	↓-2.2
4/20 07:40	155.9	↓-2.5
4/20 07:50	152.9	↓-3.0
4/20 08:00	149.5	↓-3.4
4/20 08:10	145.8	↓-3.7
4/20 08:20	141.7	↓-4.1
4/20 08:30	137.3	↓-4.4
4/20 08:40	132.7	↓-4.6
4/20 08:50	127.8	↓-4.9
4/20 09:00	122.7	↓-5.1
4/20 09:10	117.4	↓-5.3
4/20 09:20	112.0	↓-5.4
4/20 09:30	106.5	↓-5.5
4/20 09:40	100.9	↓-5.6
4/20 09:50	95.4	↓-5.5
4/20 10:00	89.8	↓-5.6
4/20 10:10	84.3	↓-5.5
4/20 10:20	79.0	↓-5.3
4/20 10:30	73.7	↓-5.3
4/20 10:40	68.7	↓-5.0
4/20 10:50	63.8	↓-4.9
4/20 11:00	59.2	↓-4.6
4/20 11:10	54.9	↓-4.3
4/20 11:20	50.9	↓-4.0
4/20 11:30	47.3	↓-3.6
4/20 11:40	44.0	↓-3.3
4/20 11:50	41.2	↓-2.8
4/20 12:00	38.7	↓-2.5
4/20 12:10	36.7	↓-2.0
4/20 12:20	35.2	↓-1.5
4/20 12:30	34.1	↓-1.1
4/20 12:40	33.4	↓-0.7	干潮
4/20 12:50	33.3	↓-0.1
4/20 13:00	33.6	↑0.3
4/20 13:10	34.4	↑0.8
4/20 13:20	35.7	↑1.3
4/20 13:30	37.5	↑1.8
4/20 13:40	39.7	↑2.2
4/20 13:50	42.3	↑2.6
4/20 14:00	45.4	↑3.1
4/20 14:10	48.8	↑3.4
4/20 14:20	52.7	↑3.9
4/20 14:30	56.8	↑4.1
4/20 14:40	61.3	↑4.5
4/20 14:50	66.1	↑4.8
4/20 15:00	71.1	↑5.0
4/20 15:10	76.4	↑5.3
4/20 15:20	81.8	↑5.4
4/20 15:30	87.4	↑5.6
4/20 15:40	93.1	↑5.7
4/20 15:50	98.8	↑5.7
4/20 16:00	104.6	↑5.8	最大潮位差
4/20 16:10	110.3	↑5.7
4/20 16:20	116.0	↑5.7
4/20 16:30	121.6	↑5.6
4/20 16:40	127.0	↑5.4
4/20 16:50	132.3	↑5.3
4/20 17:00	137.3	↑5.0
4/20 17:10	142.1	↑4.8
4/20 17:20	146.7	↑4.6
4/20 17:30	150.9	↑4.2
4/20 17:40	154.7	↑3.8
4/20 17:50	158.2	↑3.5
4/20 18:00	161.3	↑3.1
4/20 18:10	164.0	↑2.7
4/20 18:20	166.2	↑2.2
4/20 18:30	168.0	↑1.8
4/20 18:40	169.3	↑1.3
4/20 18:50	170.2	↑0.9
4/20 19:00	170.5	↑0.3	満潮
4/20 19:10	170.4	↓-0.1
4/20 19:20	169.9	↓-0.5
4/20 19:30	168.8	↓-1.1
4/20 19:40	167.3	↓-1.5
4/20 19:50	165.4	↓-1.9
4/20 20:00	163.0	↓-2.4
4/20 20:10	160.2	↓-2.8
4/20 20:20	157.0	↓-3.2
4/20 20:30	153.4	↓-3.6
4/20 20:40	149.5	↓-3.9
4/20 20:50	145.3	↓-4.2
4/20 21:00	140.8	↓-4.5
4/20 21:10	136.1	↓-4.7
4/20 21:20	131.1	↓-5.0
4/20 21:30	126.0	↓-5.1
4/20 21:40	120.7	↓-5.3
4/20 21:50	115.4	↓-5.3
4/20 22:00	110.0	↓-5.4
4/20 22:10	104.6	↓-5.4
4/20 22:20	99.2	↓-5.4
4/20 22:30	93.8	↓-5.4
4/20 22:40	88.6	↓-5.2
4/20 22:50	83.5	↓-5.1
4/20 23:00	78.6	↓-4.9
4/20 23:10	74.0	↓-4.6
4/20 23:20	69.5	↓-4.5
4/20 23:30	65.4	↓-4.1
4/20 23:40	61.6	↓-3.8
4/20 23:50	58.1	↓-3.5