20 (日)	06:19	00:16	18:58	12:40
	157cm	48cm	155cm	27cm
大潮 出 06:24 入 19:14 出 05:08 入 17:58 潮干狩り ○ 11:27～13:53

久部良（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	47.7	↓-0.8
4/20 00:10	47.3	↓-0.4	干潮
4/20 00:20	47.3	0
4/20 00:30	47.8	↑0.5
4/20 00:40	48.6	↑0.8
4/20 00:50	49.8	↑1.2
4/20 01:00	51.3	↑1.5
4/20 01:10	53.3	↑2.0
4/20 01:20	55.6	↑2.3
4/20 01:30	58.3	↑2.7
4/20 01:40	61.2	↑2.9
4/20 01:50	64.5	↑3.3
4/20 02:00	68.1	↑3.6
4/20 02:10	71.9	↑3.8
4/20 02:20	75.9	↑4.0
4/20 02:30	80.2	↑4.3
4/20 02:40	84.6	↑4.4
4/20 02:50	89.1	↑4.5
4/20 03:00	93.7	↑4.6
4/20 03:10	98.4	↑4.7
4/20 03:20	103.1	↑4.7
4/20 03:30	107.9	↑4.8
4/20 03:40	112.5	↑4.6
4/20 03:50	117.1	↑4.6
4/20 04:00	121.6	↑4.5
4/20 04:10	126.0	↑4.4
4/20 04:20	130.1	↑4.1
4/20 04:30	134.1	↑4.0
4/20 04:40	137.8	↑3.7
4/20 04:50	141.3	↑3.5
4/20 05:00	144.4	↑3.1
4/20 05:10	147.3	↑2.9
4/20 05:20	149.8	↑2.5
4/20 05:30	151.9	↑2.1
4/20 05:40	153.6	↑1.7
4/20 05:50	155.0	↑1.4
4/20 06:00	156.0	↑1.0
4/20 06:10	156.5	↑0.5	満潮
4/20 06:20	156.6	↑0.1
4/20 06:30	156.3	↓-0.3
4/20 06:40	155.5	↓-0.8
4/20 06:50	154.4	↓-1.1
4/20 07:00	152.8	↓-1.6
4/20 07:10	150.8	↓-2.0
4/20 07:20	148.4	↓-2.4
4/20 07:30	145.7	↓-2.7
4/20 07:40	142.5	↓-3.2
4/20 07:50	139.1	↓-3.4
4/20 08:00	135.3	↓-3.8
4/20 08:10	131.2	↓-4.1
4/20 08:20	126.9	↓-4.3
4/20 08:30	122.3	↓-4.6
4/20 08:40	117.5	↓-4.8
4/20 08:50	112.5	↓-5.0
4/20 09:00	107.4	↓-5.1
4/20 09:10	102.2	↓-5.2
4/20 09:20	96.9	↓-5.3
4/20 09:30	91.5	↓-5.4	最大潮位差
4/20 09:40	86.2	↓-5.3
4/20 09:50	80.9	↓-5.3
4/20 10:00	75.7	↓-5.2
4/20 10:10	70.6	↓-5.1
4/20 10:20	65.6	↓-5.0
4/20 10:30	60.8	↓-4.8
4/20 10:40	56.2	↓-4.6
4/20 10:50	51.8	↓-4.4
4/20 11:00	47.8	↓-4.0
4/20 11:10	44.0	↓-3.8
4/20 11:20	40.5	↓-3.5
4/20 11:30	37.4	↓-3.1
4/20 11:40	34.7	↓-2.7
4/20 11:50	32.4	↓-2.3
4/20 12:00	30.4	↓-2.0
4/20 12:10	28.9	↓-1.5
4/20 12:20	27.8	↓-1.1
4/20 12:30	27.2	↓-0.6	干潮
4/20 12:40	27.0	↓-0.2	干潮
4/20 12:50	27.2	↑0.2
4/20 13:00	27.9	↑0.7
4/20 13:10	29.0	↑1.1
4/20 13:20	30.6	↑1.6
4/20 13:30	32.6	↑2.0
4/20 13:40	35.0	↑2.4
4/20 13:50	37.7	↑2.7
4/20 14:00	40.9	↑3.2
4/20 14:10	44.4	↑3.5
4/20 14:20	48.2	↑3.8
4/20 14:30	52.3	↑4.1
4/20 14:40	56.7	↑4.4
4/20 14:50	61.3	↑4.6
4/20 15:00	66.1	↑4.8
4/20 15:10	71.1	↑5.0
4/20 15:20	76.2	↑5.1
4/20 15:30	81.4	↑5.2
4/20 15:40	86.7	↑5.3
4/20 15:50	92.0	↑5.3
4/20 16:00	97.3	↑5.3
4/20 16:10	102.6	↑5.3
4/20 16:20	107.7	↑5.1
4/20 16:30	112.8	↑5.1
4/20 16:40	117.7	↑4.9
4/20 16:50	122.3	↑4.6
4/20 17:00	126.8	↑4.5
4/20 17:10	131.0	↑4.2
4/20 17:20	135.0	↑4.0
4/20 17:30	138.6	↑3.6
4/20 17:40	141.9	↑3.3
4/20 17:50	144.8	↑2.9
4/20 18:00	147.4	↑2.6
4/20 18:10	149.6	↑2.2
4/20 18:20	151.3	↑1.7
4/20 18:30	152.7	↑1.4
4/20 18:40	153.6	↑0.9
4/20 18:50	154.2	↑0.6	満潮
4/20 19:00	154.2	0
4/20 19:10	153.9	↓-0.3
4/20 19:20	153.2	↓-0.7
4/20 19:30	152.0	↓-1.2
4/20 19:40	150.4	↓-1.6
4/20 19:50	148.5	↓-1.9
4/20 20:00	146.2	↓-2.3
4/20 20:10	143.5	↓-2.7
4/20 20:20	140.5	↓-3.0
4/20 20:30	137.3	↓-3.2
4/20 20:40	133.7	↓-3.6
4/20 20:50	129.9	↓-3.8
4/20 21:00	125.9	↓-4.0
4/20 21:10	121.7	↓-4.2
4/20 21:20	117.3	↓-4.4
4/20 21:30	112.9	↓-4.4
4/20 21:40	108.3	↓-4.6
4/20 21:50	103.7	↓-4.6
4/20 22:00	99.1	↓-4.6
4/20 22:10	94.5	↓-4.6
4/20 22:20	90.0	↓-4.5
4/20 22:30	85.6	↓-4.4
4/20 22:40	81.3	↓-4.3
4/20 22:50	77.2	↓-4.1
4/20 23:00	73.3	↓-3.9
4/20 23:10	69.6	↓-3.7
4/20 23:20	66.2	↓-3.4
4/20 23:30	63.0	↓-3.2
4/20 23:40	60.2	↓-2.8
4/20 23:50	57.7	↓-2.5