20 (火)	01:55	06:00	11:42	19:44
	125cm	113cm	140cm	54cm
小潮 出 06:13 入 19:04 出 12:05 入 01:16

長山（沖縄）2021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	116.6	↑1.5
4/20 00:10	118.0	↑1.4
4/20 00:20	119.2	↑1.2
4/20 00:30	120.3	↑1.1
4/20 00:40	121.3	↑1.0
4/20 00:50	122.2	↑0.9
4/20 01:00	122.9	↑0.7
4/20 01:10	123.5	↑0.6
4/20 01:20	124.0	↑0.5
4/20 01:30	124.3	↑0.3
4/20 01:40	124.5	↑0.2
4/20 01:50	124.6	↑0.1	満潮
4/20 02:00	124.6	0
4/20 02:10	124.5	↓-0.1
4/20 02:20	124.2	↓-0.3
4/20 02:30	123.9	↓-0.3
4/20 02:40	123.5	↓-0.4
4/20 02:50	123.0	↓-0.5
4/20 03:00	122.5	↓-0.5
4/20 03:10	121.9	↓-0.6
4/20 03:20	121.2	↓-0.7
4/20 03:30	120.5	↓-0.7
4/20 03:40	119.8	↓-0.7
4/20 03:50	119.0	↓-0.8
4/20 04:00	118.3	↓-0.7
4/20 04:10	117.6	↓-0.7
4/20 04:20	116.8	↓-0.8
4/20 04:30	116.2	↓-0.6
4/20 04:40	115.5	↓-0.7
4/20 04:50	114.9	↓-0.6
4/20 05:00	114.4	↓-0.5
4/20 05:10	113.9	↓-0.5
4/20 05:20	113.5	↓-0.4
4/20 05:30	113.2	↓-0.3
4/20 05:40	112.9	↓-0.3
4/20 05:50	112.8	↓-0.1	干潮
4/20 06:00	112.8	0	干潮
4/20 06:10	112.8	0
4/20 06:20	113.0	↑0.2
4/20 06:30	113.2	↑0.2
4/20 06:40	113.6	↑0.4
4/20 06:50	114.1	↑0.5
4/20 07:00	114.6	↑0.5
4/20 07:10	115.3	↑0.7
4/20 07:20	116.0	↑0.7
4/20 07:30	116.9	↑0.9
4/20 07:40	117.8	↑0.9
4/20 07:50	118.7	↑0.9
4/20 08:00	119.8	↑1.1
4/20 08:10	120.9	↑1.1
4/20 08:20	122.0	↑1.1
4/20 08:30	123.2	↑1.2
4/20 08:40	124.4	↑1.2
4/20 08:50	125.6	↑1.2
4/20 09:00	126.8	↑1.2
4/20 09:10	128.0	↑1.2
4/20 09:20	129.2	↑1.2
4/20 09:30	130.3	↑1.1
4/20 09:40	131.4	↑1.1
4/20 09:50	132.5	↑1.1
4/20 10:00	133.6	↑1.1
4/20 10:10	134.5	↑0.9
4/20 10:20	135.4	↑0.9
4/20 10:30	136.3	↑0.9
4/20 10:40	137.0	↑0.7
4/20 10:50	137.6	↑0.6
4/20 11:00	138.2	↑0.6
4/20 11:10	138.6	↑0.4
4/20 11:20	138.9	↑0.3
4/20 11:30	139.1	↑0.2
4/20 11:40	139.2	↑0.1	満潮
4/20 11:50	139.2	0
4/20 12:00	139.0	↓-0.2
4/20 12:10	138.7	↓-0.3
4/20 12:20	138.2	↓-0.5
4/20 12:30	137.6	↓-0.6
4/20 12:40	136.9	↓-0.7
4/20 12:50	136.0	↓-0.9
4/20 13:00	135.0	↓-1.0
4/20 13:10	133.8	↓-1.2
4/20 13:20	132.5	↓-1.3
4/20 13:30	131.0	↓-1.5
4/20 13:40	129.4	↓-1.6
4/20 13:50	127.6	↓-1.8
4/20 14:00	125.7	↓-1.9
4/20 14:10	123.7	↓-2.0
4/20 14:20	121.6	↓-2.1
4/20 14:30	119.3	↓-2.3
4/20 14:40	116.9	↓-2.4
4/20 14:50	114.4	↓-2.5
4/20 15:00	111.9	↓-2.5
4/20 15:10	109.2	↓-2.7
4/20 15:20	106.5	↓-2.7
4/20 15:30	103.7	↓-2.8
4/20 15:40	100.8	↓-2.9	最大潮位差
4/20 15:50	98.0	↓-2.8
4/20 16:00	95.1	↓-2.9	最大潮位差
4/20 16:10	92.2	↓-2.9	最大潮位差
4/20 16:20	89.3	↓-2.9	最大潮位差
4/20 16:30	86.4	↓-2.9	最大潮位差
4/20 16:40	83.6	↓-2.8
4/20 16:50	80.8	↓-2.8
4/20 17:00	78.1	↓-2.7
4/20 17:10	75.4	↓-2.7
4/20 17:20	72.9	↓-2.5
4/20 17:30	70.5	↓-2.4
4/20 17:40	68.2	↓-2.3
4/20 17:50	66.0	↓-2.2
4/20 18:00	64.0	↓-2.0
4/20 18:10	62.1	↓-1.9
4/20 18:20	60.4	↓-1.7
4/20 18:30	58.9	↓-1.5
4/20 18:40	57.6	↓-1.3
4/20 18:50	56.4	↓-1.2
4/20 19:00	55.5	↓-0.9
4/20 19:10	54.7	↓-0.8
4/20 19:20	54.1	↓-0.6
4/20 19:30	53.8	↓-0.3
4/20 19:40	53.6	↓-0.2	干潮
4/20 19:50	53.6	0
4/20 20:00	53.9	↑0.3
4/20 20:10	54.3	↑0.4
4/20 20:20	54.9	↑0.6
4/20 20:30	55.7	↑0.8
4/20 20:40	56.7	↑1.0
4/20 20:50	57.9	↑1.2
4/20 21:00	59.2	↑1.3
4/20 21:10	60.7	↑1.5
4/20 21:20	62.3	↑1.6
4/20 21:30	64.1	↑1.8
4/20 21:40	66.0	↑1.9
4/20 21:50	68.0	↑2.0
4/20 22:00	70.2	↑2.2
4/20 22:10	72.4	↑2.2
4/20 22:20	74.7	↑2.3
4/20 22:30	77.2	↑2.5
4/20 22:40	79.6	↑2.4
4/20 22:50	82.2	↑2.6
4/20 23:00	84.8	↑2.6
4/20 23:10	87.4	↑2.6
4/20 23:20	90.0	↑2.6
4/20 23:30	92.7	↑2.7
4/20 23:40	95.4	↑2.7
4/20 23:50	98.0	↑2.6