20 (日)	07:40	02:35	-	15:59
	139cm	119cm	-	41cm
小潮 出 05:04 入 18:19 出 00:18 入 09:43 潮干狩り ○ 15:20～16:38

第一海堡（千葉）2025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	125.8	↓-0.6
4/20 00:10	125.1	↓-0.7
4/20 00:20	124.4	↓-0.7
4/20 00:30	123.7	↓-0.7
4/20 00:40	123.0	↓-0.7
4/20 00:50	122.3	↓-0.7
4/20 01:00	121.6	↓-0.7
4/20 01:10	121.0	↓-0.6
4/20 01:20	120.4	↓-0.6
4/20 01:30	119.9	↓-0.5
4/20 01:40	119.4	↓-0.5
4/20 01:50	119.0	↓-0.4
4/20 02:00	118.6	↓-0.4
4/20 02:10	118.4	↓-0.2
4/20 02:20	118.2	↓-0.2
4/20 02:30	118.1	↓-0.1	干潮
4/20 02:40	118.2	↑0.1
4/20 02:50	118.3	↑0.1
4/20 03:00	118.5	↑0.2
4/20 03:10	118.8	↑0.3
4/20 03:20	119.2	↑0.4
4/20 03:30	119.6	↑0.4
4/20 03:40	120.2	↑0.6
4/20 03:50	120.8	↑0.6
4/20 04:00	121.6	↑0.8
4/20 04:10	122.4	↑0.8
4/20 04:20	123.2	↑0.8
4/20 04:30	124.2	↑1.0
4/20 04:40	125.1	↑0.9
4/20 04:50	126.1	↑1.0
4/20 05:00	127.2	↑1.1
4/20 05:10	128.2	↑1.0
4/20 05:20	129.3	↑1.1
4/20 05:30	130.4	↑1.1
4/20 05:40	131.4	↑1.0
4/20 05:50	132.4	↑1.0
4/20 06:00	133.4	↑1.0
4/20 06:10	134.4	↑1.0
4/20 06:20	135.3	↑0.9
4/20 06:30	136.1	↑0.8
4/20 06:40	136.8	↑0.7
4/20 06:50	137.5	↑0.7
4/20 07:00	138.0	↑0.5
4/20 07:10	138.4	↑0.4
4/20 07:20	138.7	↑0.3
4/20 07:30	138.9	↑0.2	満潮
4/20 07:40	139.0	↑0.1	満潮
4/20 07:50	138.9	↓-0.1
4/20 08:00	138.6	↓-0.3
4/20 08:10	138.2	↓-0.4
4/20 08:20	137.7	↓-0.5
4/20 08:30	137.0	↓-0.7
4/20 08:40	136.1	↓-0.9
4/20 08:50	135.0	↓-1.1
4/20 09:00	133.8	↓-1.2
4/20 09:10	132.4	↓-1.4
4/20 09:20	130.9	↓-1.5
4/20 09:30	129.2	↓-1.7
4/20 09:40	127.3	↓-1.9
4/20 09:50	125.3	↓-2.0
4/20 10:00	123.2	↓-2.1
4/20 10:10	120.9	↓-2.3
4/20 10:20	118.4	↓-2.5
4/20 10:30	115.9	↓-2.5
4/20 10:40	113.2	↓-2.7
4/20 10:50	110.4	↓-2.8
4/20 11:00	107.6	↓-2.8
4/20 11:10	104.6	↓-3.0
4/20 11:20	101.6	↓-3.0
4/20 11:30	98.5	↓-3.1
4/20 11:40	95.4	↓-3.1
4/20 11:50	92.3	↓-3.1
4/20 12:00	89.1	↓-3.2	最大潮位差
4/20 12:10	85.9	↓-3.2	最大潮位差
4/20 12:20	82.8	↓-3.1
4/20 12:30	79.6	↓-3.2	最大潮位差
4/20 12:40	76.5	↓-3.1
4/20 12:50	73.5	↓-3.0
4/20 13:00	70.5	↓-3.0
4/20 13:10	67.6	↓-2.9
4/20 13:20	64.8	↓-2.8
4/20 13:30	62.1	↓-2.7
4/20 13:40	59.5	↓-2.6
4/20 13:50	57.1	↓-2.4
4/20 14:00	54.7	↓-2.4
4/20 14:10	52.6	↓-2.1
4/20 14:20	50.6	↓-2.0
4/20 14:30	48.7	↓-1.9
4/20 14:40	47.1	↓-1.6
4/20 14:50	45.6	↓-1.5
4/20 15:00	44.3	↓-1.3
4/20 15:10	43.2	↓-1.1
4/20 15:20	42.3	↓-0.9
4/20 15:30	41.7	↓-0.6
4/20 15:40	41.2	↓-0.5
4/20 15:50	40.9	↓-0.3	干潮
4/20 16:00	40.8	↓-0.1
4/20 16:10	41.0	↑0.2
4/20 16:20	41.3	↑0.3
4/20 16:30	41.8	↑0.5
4/20 16:40	42.6	↑0.8
4/20 16:50	43.5	↑0.9
4/20 17:00	44.6	↑1.1
4/20 17:10	45.9	↑1.3
4/20 17:20	47.4	↑1.5
4/20 17:30	49.0	↑1.6
4/20 17:40	50.8	↑1.8
4/20 17:50	52.7	↑1.9
4/20 18:00	54.8	↑2.1
4/20 18:10	57.0	↑2.2
4/20 18:20	59.3	↑2.3
4/20 18:30	61.7	↑2.4
4/20 18:40	64.2	↑2.5
4/20 18:50	66.8	↑2.6
4/20 19:00	69.4	↑2.6
4/20 19:10	72.2	↑2.8
4/20 19:20	74.9	↑2.7
4/20 19:30	77.7	↑2.8
4/20 19:40	80.5	↑2.8
4/20 19:50	83.3	↑2.8
4/20 20:00	86.1	↑2.8
4/20 20:10	88.9	↑2.8
4/20 20:20	91.7	↑2.8
4/20 20:30	94.4	↑2.7
4/20 20:40	97.1	↑2.7
4/20 20:50	99.7	↑2.6
4/20 21:00	102.3	↑2.6
4/20 21:10	104.8	↑2.5
4/20 21:20	107.2	↑2.4
4/20 21:30	109.5	↑2.3
4/20 21:40	111.7	↑2.2
4/20 21:50	113.8	↑2.1
4/20 22:00	115.7	↑1.9
4/20 22:10	117.6	↑1.9
4/20 22:20	119.4	↑1.8
4/20 22:30	121.0	↑1.6
4/20 22:40	122.5	↑1.5
4/20 22:50	123.9	↑1.4
4/20 23:00	125.1	↑1.2
4/20 23:10	126.3	↑1.2
4/20 23:20	127.3	↑1.0
4/20 23:30	128.1	↑0.8
4/20 23:40	128.9	↑0.8
4/20 23:50	129.5	↑0.6