20 (火)	04:58	11:20	17:45	23:33
	149cm	21cm	150cm	56cm
大潮 出 05:04 入 18:19 出 19:18 入 05:43 潮干狩り ○ 09:46～12:52

岩井袋（千葉）2038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	53.9	↑2.0
4/20 00:10	56.2	↑2.3
4/20 00:20	58.9	↑2.7
4/20 00:30	61.8	↑2.9
4/20 00:40	65.0	↑3.2
4/20 00:50	68.5	↑3.5
4/20 01:00	72.2	↑3.7
4/20 01:10	76.2	↑4.0
4/20 01:20	80.2	↑4.0
4/20 01:30	84.5	↑4.3
4/20 01:40	88.8	↑4.3
4/20 01:50	93.2	↑4.4
4/20 02:00	97.6	↑4.4
4/20 02:10	102.1	↑4.5
4/20 02:20	106.5	↑4.4
4/20 02:30	110.8	↑4.3
4/20 02:40	115.1	↑4.3
4/20 02:50	119.2	↑4.1
4/20 03:00	123.2	↑4.0
4/20 03:10	126.9	↑3.7
4/20 03:20	130.5	↑3.6
4/20 03:30	133.7	↑3.2
4/20 03:40	136.7	↑3.0
4/20 03:50	139.4	↑2.7
4/20 04:00	141.8	↑2.4
4/20 04:10	143.8	↑2.0
4/20 04:20	145.5	↑1.7
4/20 04:30	146.7	↑1.2
4/20 04:40	147.6	↑0.9
4/20 04:50	148.1	↑0.5	満潮
4/20 05:00	148.1	0
4/20 05:10	147.8	↓-0.3
4/20 05:20	147.0	↓-0.8
4/20 05:30	145.9	↓-1.1
4/20 05:40	144.3	↓-1.6
4/20 05:50	142.3	↓-2.0
4/20 06:00	139.9	↓-2.4
4/20 06:10	137.2	↓-2.7
4/20 06:20	134.1	↓-3.1
4/20 06:30	130.7	↓-3.4
4/20 06:40	126.9	↓-3.8
4/20 06:50	122.9	↓-4.0
4/20 07:00	118.6	↓-4.3
4/20 07:10	114.1	↓-4.5
4/20 07:20	109.4	↓-4.7
4/20 07:30	104.4	↓-5.0
4/20 07:40	99.4	↓-5.0
4/20 07:50	94.3	↓-5.1
4/20 08:00	89.0	↓-5.3	最大潮位差
4/20 08:10	83.8	↓-5.2
4/20 08:20	78.5	↓-5.3	最大潮位差
4/20 08:30	73.3	↓-5.2
4/20 08:40	68.2	↓-5.1
4/20 08:50	63.1	↓-5.1
4/20 09:00	58.2	↓-4.9
4/20 09:10	53.5	↓-4.7
4/20 09:20	49.0	↓-4.5
4/20 09:30	44.7	↓-4.3
4/20 09:40	40.7	↓-4.0
4/20 09:50	37.0	↓-3.7
4/20 10:00	33.6	↓-3.4
4/20 10:10	30.6	↓-3.0
4/20 10:20	27.9	↓-2.7
4/20 10:30	25.7	↓-2.2
4/20 10:40	23.8	↓-1.9
4/20 10:50	22.3	↓-1.5
4/20 11:00	21.3	↓-1.0
4/20 11:10	20.7	↓-0.6	干潮
4/20 11:20	20.5	↓-0.2	干潮
4/20 11:30	20.8	↑0.3
4/20 11:40	21.5	↑0.7
4/20 11:50	22.7	↑1.2
4/20 12:00	24.2	↑1.5
4/20 12:10	26.2	↑2.0
4/20 12:20	28.6	↑2.4
4/20 12:30	31.3	↑2.7
4/20 12:40	34.4	↑3.1
4/20 12:50	37.9	↑3.5
4/20 13:00	41.7	↑3.8
4/20 13:10	45.7	↑4.0
4/20 13:20	50.1	↑4.4
4/20 13:30	54.6	↑4.5
4/20 13:40	59.4	↑4.8
4/20 13:50	64.3	↑4.9
4/20 14:00	69.4	↑5.1
4/20 14:10	74.6	↑5.2
4/20 14:20	79.8	↑5.2
4/20 14:30	85.1	↑5.3	最大潮位差
4/20 14:40	90.3	↑5.2
4/20 14:50	95.5	↑5.2
4/20 15:00	100.7	↑5.2
4/20 15:10	105.7	↑5.0
4/20 15:20	110.6	↑4.9
4/20 15:30	115.3	↑4.7
4/20 15:40	119.8	↑4.5
4/20 15:50	124.1	↑4.3
4/20 16:00	128.1	↑4.0
4/20 16:10	131.8	↑3.7
4/20 16:20	135.2	↑3.4
4/20 16:30	138.2	↑3.0
4/20 16:40	140.9	↑2.7
4/20 16:50	143.3	↑2.4
4/20 17:00	145.2	↑1.9
4/20 17:10	146.8	↑1.6
4/20 17:20	148.0	↑1.2
4/20 17:30	148.7	↑0.7
4/20 17:40	149.1	↑0.4	満潮
4/20 17:50	149.0	↓-0.1
4/20 18:00	148.6	↓-0.4
4/20 18:10	147.7	↓-0.9
4/20 18:20	146.5	↓-1.2
4/20 18:30	144.9	↓-1.6
4/20 18:40	143.0	↓-1.9
4/20 18:50	140.7	↓-2.3
4/20 19:00	138.1	↓-2.6
4/20 19:10	135.2	↓-2.9
4/20 19:20	132.1	↓-3.1
4/20 19:30	128.7	↓-3.4
4/20 19:40	125.1	↓-3.6
4/20 19:50	121.3	↓-3.8
4/20 20:00	117.4	↓-3.9
4/20 20:10	113.3	↓-4.1
4/20 20:20	109.2	↓-4.1
4/20 20:30	105.0	↓-4.2
4/20 20:40	100.8	↓-4.2
4/20 20:50	96.6	↓-4.2
4/20 21:00	92.5	↓-4.1
4/20 21:10	88.4	↓-4.1
4/20 21:20	84.5	↓-3.9
4/20 21:30	80.7	↓-3.8
4/20 21:40	77.0	↓-3.7
4/20 21:50	73.6	↓-3.4
4/20 22:00	70.4	↓-3.2
4/20 22:10	67.5	↓-2.9
4/20 22:20	64.8	↓-2.7
4/20 22:30	62.5	↓-2.3
4/20 22:40	60.4	↓-2.1
4/20 22:50	58.7	↓-1.7
4/20 23:00	57.4	↓-1.3
4/20 23:10	56.4	↓-1.0
4/20 23:20	55.7	↓-0.7
4/20 23:30	55.5	↓-0.2	干潮
4/20 23:40	55.6	↑0.1
4/20 23:50	56.0	↑0.4