20 (日)	05:57	12:14	18:35	-
	183cm	30cm	189cm	-
大潮 出 05:36 入 18:45 出 04:23 入 17:26 潮干狩り ○ 10:52～13:35

日振島（愛媛）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	52.3	↑0.1
4/20 00:10	52.9	↑0.6
4/20 00:20	53.9	↑1.0
4/20 00:30	55.4	↑1.5
4/20 00:40	57.3	↑1.9
4/20 00:50	59.7	↑2.4
4/20 01:00	62.5	↑2.8
4/20 01:10	65.7	↑3.2
4/20 01:20	69.3	↑3.6
4/20 01:30	73.3	↑4.0
4/20 01:40	77.5	↑4.2
4/20 01:50	82.1	↑4.6
4/20 02:00	86.9	↑4.8
4/20 02:10	92.0	↑5.1
4/20 02:20	97.2	↑5.2
4/20 02:30	102.6	↑5.4
4/20 02:40	108.1	↑5.5
4/20 02:50	113.7	↑5.6
4/20 03:00	119.3	↑5.6
4/20 03:10	124.9	↑5.6
4/20 03:20	130.5	↑5.6
4/20 03:30	135.9	↑5.4
4/20 03:40	141.3	↑5.4
4/20 03:50	146.4	↑5.1
4/20 04:00	151.3	↑4.9
4/20 04:10	156.0	↑4.7
4/20 04:20	160.4	↑4.4
4/20 04:30	164.4	↑4.0
4/20 04:40	168.1	↑3.7
4/20 04:50	171.4	↑3.3
4/20 05:00	174.3	↑2.9
4/20 05:10	176.8	↑2.5
4/20 05:20	178.8	↑2.0
4/20 05:30	180.3	↑1.5
4/20 05:40	181.4	↑1.1
4/20 05:50	181.9	↑0.5	満潮
4/20 06:00	182.0	↑0.1
4/20 06:10	181.5	↓-0.5
4/20 06:20	180.6	↓-0.9
4/20 06:30	179.1	↓-1.5
4/20 06:40	177.1	↓-2.0
4/20 06:50	174.7	↓-2.4
4/20 07:00	171.8	↓-2.9
4/20 07:10	168.4	↓-3.4
4/20 07:20	164.6	↓-3.8
4/20 07:30	160.4	↓-4.2
4/20 07:40	155.8	↓-4.6
4/20 07:50	150.8	↓-5.0
4/20 08:00	145.6	↓-5.2
4/20 08:10	140.1	↓-5.5
4/20 08:20	134.3	↓-5.8
4/20 08:30	128.3	↓-6.0
4/20 08:40	122.2	↓-6.1
4/20 08:50	115.9	↓-6.3
4/20 09:00	109.6	↓-6.3
4/20 09:10	103.2	↓-6.4
4/20 09:20	96.9	↓-6.3
4/20 09:30	90.6	↓-6.3
4/20 09:40	84.4	↓-6.2
4/20 09:50	78.4	↓-6.0
4/20 10:00	72.5	↓-5.9
4/20 10:10	66.9	↓-5.6
4/20 10:20	61.5	↓-5.4
4/20 10:30	56.5	↓-5.0
4/20 10:40	51.7	↓-4.8
4/20 10:50	47.4	↓-4.3
4/20 11:00	43.5	↓-3.9
4/20 11:10	40.0	↓-3.5
4/20 11:20	37.0	↓-3.0
4/20 11:30	34.4	↓-2.6
4/20 11:40	32.4	↓-2.0
4/20 11:50	30.8	↓-1.6
4/20 12:00	29.8	↓-1.0
4/20 12:10	29.4	↓-0.4	干潮
4/20 12:20	29.5	↑0.1
4/20 12:30	30.1	↑0.6
4/20 12:40	31.3	↑1.2
4/20 12:50	32.9	↑1.6
4/20 13:00	35.2	↑2.3
4/20 13:10	37.9	↑2.7
4/20 13:20	41.1	↑3.2
4/20 13:30	44.8	↑3.7
4/20 13:40	48.9	↑4.1
4/20 13:50	53.4	↑4.5
4/20 14:00	58.3	↑4.9
4/20 14:10	63.6	↑5.3
4/20 14:20	69.2	↑5.6
4/20 14:30	75.0	↑5.8
4/20 14:40	81.1	↑6.1
4/20 14:50	87.4	↑6.3
4/20 15:00	93.8	↑6.4
4/20 15:10	100.3	↑6.5
4/20 15:20	106.9	↑6.6	最大潮位差
4/20 15:30	113.5	↑6.6	最大潮位差
4/20 15:40	120.0	↑6.5
4/20 15:50	126.5	↑6.5
4/20 16:00	132.9	↑6.4
4/20 16:10	139.1	↑6.2
4/20 16:20	145.1	↑6.0
4/20 16:30	150.9	↑5.8
4/20 16:40	156.3	↑5.4
4/20 16:50	161.4	↑5.1
4/20 17:00	166.2	↑4.8
4/20 17:10	170.6	↑4.4
4/20 17:20	174.5	↑3.9
4/20 17:30	178.1	↑3.6
4/20 17:40	181.1	↑3.0
4/20 17:50	183.6	↑2.5
4/20 18:00	185.7	↑2.1
4/20 18:10	187.2	↑1.5
4/20 18:20	188.2	↑1.0
4/20 18:30	188.7	↑0.5	満潮
4/20 18:40	188.6	↓-0.1
4/20 18:50	188.0	↓-0.6
4/20 19:00	186.9	↓-1.1
4/20 19:10	185.2	↓-1.7
4/20 19:20	183.1	↓-2.1
4/20 19:30	180.5	↓-2.6
4/20 19:40	177.4	↓-3.1
4/20 19:50	173.9	↓-3.5
4/20 20:00	169.9	↓-4.0
4/20 20:10	165.6	↓-4.3
4/20 20:20	161.0	↓-4.6
4/20 20:30	156.1	↓-4.9
4/20 20:40	150.8	↓-5.3
4/20 20:50	145.4	↓-5.4
4/20 21:00	139.8	↓-5.6
4/20 21:10	134.0	↓-5.8
4/20 21:20	128.1	↓-5.9
4/20 21:30	122.2	↓-5.9
4/20 21:40	116.2	↓-6.0
4/20 21:50	110.3	↓-5.9
4/20 22:00	104.5	↓-5.8
4/20 22:10	98.7	↓-5.8
4/20 22:20	93.2	↓-5.5
4/20 22:30	87.9	↓-5.3
4/20 22:40	82.8	↓-5.1
4/20 22:50	78.0	↓-4.8
4/20 23:00	73.5	↓-4.5
4/20 23:10	69.4	↓-4.1
4/20 23:20	65.7	↓-3.7
4/20 23:30	62.3	↓-3.4
4/20 23:40	59.5	↓-2.8
4/20 23:50	57.1	↓-2.4