20 (木)	04:59	11:07	16:54	23:04
	150cm	75cm	143cm	58cm
若潮 出 06:13 入 19:04 出 03:19 入 15:13

長山（沖縄）2028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	71.6	↑2.3
4/20 00:10	74.1	↑2.5
4/20 00:20	76.7	↑2.6
4/20 00:30	79.6	↑2.9
4/20 00:40	82.6	↑3.0
4/20 00:50	85.8	↑3.2
4/20 01:00	89.1	↑3.3
4/20 01:10	92.5	↑3.4
4/20 01:20	96.0	↑3.5
4/20 01:30	99.6	↑3.6
4/20 01:40	103.2	↑3.6
4/20 01:50	106.8	↑3.6
4/20 02:00	110.5	↑3.7	最大潮位差
4/20 02:10	114.1	↑3.6
4/20 02:20	117.6	↑3.5
4/20 02:30	121.1	↑3.5
4/20 02:40	124.4	↑3.3
4/20 02:50	127.7	↑3.3
4/20 03:00	130.8	↑3.1
4/20 03:10	133.7	↑2.9
4/20 03:20	136.4	↑2.7
4/20 03:30	138.9	↑2.5
4/20 03:40	141.2	↑2.3
4/20 03:50	143.3	↑2.1
4/20 04:00	145.1	↑1.8
4/20 04:10	146.6	↑1.5
4/20 04:20	147.8	↑1.2
4/20 04:30	148.8	↑1.0
4/20 04:40	149.5	↑0.7
4/20 04:50	149.9	↑0.4	満潮
4/20 05:00	149.9	0
4/20 05:10	149.7	↓-0.2
4/20 05:20	149.2	↓-0.5
4/20 05:30	148.5	↓-0.7
4/20 05:40	147.4	↓-1.1
4/20 05:50	146.1	↓-1.3
4/20 06:00	144.5	↓-1.6
4/20 06:10	142.7	↓-1.8
4/20 06:20	140.6	↓-2.1
4/20 06:30	138.4	↓-2.2
4/20 06:40	135.9	↓-2.5
4/20 06:50	133.3	↓-2.6
4/20 07:00	130.6	↓-2.7
4/20 07:10	127.7	↓-2.9
4/20 07:20	124.7	↓-3.0
4/20 07:30	121.6	↓-3.1
4/20 07:40	118.4	↓-3.2
4/20 07:50	115.2	↓-3.2
4/20 08:00	112.0	↓-3.2
4/20 08:10	108.8	↓-3.2
4/20 08:20	105.7	↓-3.1
4/20 08:30	102.6	↓-3.1
4/20 08:40	99.5	↓-3.1
4/20 08:50	96.6	↓-2.9
4/20 09:00	93.8	↓-2.8
4/20 09:10	91.1	↓-2.7
4/20 09:20	88.5	↓-2.6
4/20 09:30	86.2	↓-2.3
4/20 09:40	84.0	↓-2.2
4/20 09:50	82.0	↓-2.0
4/20 10:00	80.2	↓-1.8
4/20 10:10	78.7	↓-1.5
4/20 10:20	77.4	↓-1.3
4/20 10:30	76.3	↓-1.1
4/20 10:40	75.5	↓-0.8
4/20 10:50	75.0	↓-0.5
4/20 11:00	74.7	↓-0.3	干潮
4/20 11:10	74.6	↓-0.1
4/20 11:20	74.9	↑0.3
4/20 11:30	75.4	↑0.5
4/20 11:40	76.1	↑0.7
4/20 11:50	77.1	↑1.0
4/20 12:00	78.4	↑1.3
4/20 12:10	79.9	↑1.5
4/20 12:20	81.6	↑1.7
4/20 12:30	83.5	↑1.9
4/20 12:40	85.7	↑2.2
4/20 12:50	88.0	↑2.3
4/20 13:00	90.5	↑2.5
4/20 13:10	93.1	↑2.6
4/20 13:20	95.9	↑2.8
4/20 13:30	98.8	↑2.9
4/20 13:40	101.7	↑2.9
4/20 13:50	104.7	↑3.0
4/20 14:00	107.8	↑3.1
4/20 14:10	110.9	↑3.1
4/20 14:20	113.9	↑3.0
4/20 14:30	117.0	↑3.1
4/20 14:40	119.9	↑2.9
4/20 14:50	122.8	↑2.9
4/20 15:00	125.5	↑2.7
4/20 15:10	128.2	↑2.7
4/20 15:20	130.6	↑2.4
4/20 15:30	132.9	↑2.3
4/20 15:40	135.0	↑2.1
4/20 15:50	136.8	↑1.8
4/20 16:00	138.5	↑1.7
4/20 16:10	139.8	↑1.3
4/20 16:20	140.9	↑1.1
4/20 16:30	141.8	↑0.9
4/20 16:40	142.3	↑0.5
4/20 16:50	142.6	↑0.3	満潮
4/20 17:00	142.5	↓-0.1
4/20 17:10	142.2	↓-0.3
4/20 17:20	141.5	↓-0.7
4/20 17:30	140.6	↓-0.9
4/20 17:40	139.3	↓-1.3
4/20 17:50	137.8	↓-1.5
4/20 18:00	136.0	↓-1.8
4/20 18:10	134.0	↓-2.0
4/20 18:20	131.7	↓-2.3
4/20 18:30	129.2	↓-2.5
4/20 18:40	126.5	↓-2.7
4/20 18:50	123.5	↓-3.0
4/20 19:00	120.5	↓-3.0
4/20 19:10	117.2	↓-3.3
4/20 19:20	113.9	↓-3.3
4/20 19:30	110.4	↓-3.5
4/20 19:40	106.9	↓-3.5
4/20 19:50	103.3	↓-3.6
4/20 20:00	99.7	↓-3.6
4/20 20:10	96.1	↓-3.6
4/20 20:20	92.5	↓-3.6
4/20 20:30	89.0	↓-3.5
4/20 20:40	85.6	↓-3.4
4/20 20:50	82.3	↓-3.3
4/20 21:00	79.1	↓-3.2
4/20 21:10	76.0	↓-3.1
4/20 21:20	73.1	↓-2.9
4/20 21:30	70.4	↓-2.7
4/20 21:40	68.0	↓-2.4
4/20 21:50	65.7	↓-2.3
4/20 22:00	63.7	↓-2.0
4/20 22:10	62.0	↓-1.7
4/20 22:20	60.5	↓-1.5
4/20 22:30	59.4	↓-1.1
4/20 22:40	58.5	↓-0.9
4/20 22:50	57.9	↓-0.6
4/20 23:00	57.7	↓-0.2	干潮
4/20 23:10	57.7	0
4/20 23:20	58.1	↑0.4
4/20 23:30	58.8	↑0.7
4/20 23:40	59.8	↑1.0
4/20 23:50	61.1	↑1.3