20 (水)	03:25	09:18	15:09	21:28
	134cm	56cm	130cm	33cm
中潮 出 05:05 入 18:18 出 03:44 入 15:17

館山（千葉）2039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	81.1	↑3.9
4/20 00:10	84.9	↑3.8
4/20 00:20	88.7	↑3.8
4/20 00:30	92.6	↑3.9
4/20 00:40	96.4	↑3.8
4/20 00:50	100.1	↑3.7
4/20 01:00	103.7	↑3.6
4/20 01:10	107.3	↑3.6
4/20 01:20	110.7	↑3.4
4/20 01:30	113.9	↑3.2
4/20 01:40	116.9	↑3.0
4/20 01:50	119.8	↑2.9
4/20 02:00	122.4	↑2.6
4/20 02:10	124.7	↑2.3
4/20 02:20	126.8	↑2.1
4/20 02:30	128.6	↑1.8
4/20 02:40	130.2	↑1.6
4/20 02:50	131.4	↑1.2
4/20 03:00	132.3	↑0.9
4/20 03:10	132.9	↑0.6
4/20 03:20	133.2	↑0.3	満潮
4/20 03:30	133.1	↓-0.1
4/20 03:40	132.8	↓-0.3
4/20 03:50	132.2	↓-0.6
4/20 04:00	131.3	↓-0.9
4/20 04:10	130.1	↓-1.2
4/20 04:20	128.6	↓-1.5
4/20 04:30	126.9	↓-1.7
4/20 04:40	125.0	↓-1.9
4/20 04:50	122.8	↓-2.2
4/20 05:00	120.4	↓-2.4
4/20 05:10	117.9	↓-2.5
4/20 05:20	115.1	↓-2.8
4/20 05:30	112.2	↓-2.9
4/20 05:40	109.1	↓-3.1
4/20 05:50	106.0	↓-3.1
4/20 06:00	102.7	↓-3.3
4/20 06:10	99.3	↓-3.4
4/20 06:20	95.9	↓-3.4
4/20 06:30	92.5	↓-3.4
4/20 06:40	89.1	↓-3.4
4/20 06:50	85.7	↓-3.4
4/20 07:00	82.3	↓-3.4
4/20 07:10	79.0	↓-3.3
4/20 07:20	75.9	↓-3.1
4/20 07:30	72.9	↓-3.0
4/20 07:40	70.1	↓-2.8
4/20 07:50	67.4	↓-2.7
4/20 08:00	65.0	↓-2.4
4/20 08:10	62.9	↓-2.1
4/20 08:20	61.0	↓-1.9
4/20 08:30	59.3	↓-1.7
4/20 08:40	58.0	↓-1.3
4/20 08:50	57.0	↓-1.0
4/20 09:00	56.3	↓-0.7
4/20 09:10	56.0	↓-0.3	干潮
4/20 09:20	55.9	↓-0.1
4/20 09:30	56.1	↑0.2
4/20 09:40	56.7	↑0.6
4/20 09:50	57.5	↑0.8
4/20 10:00	58.7	↑1.2
4/20 10:10	60.1	↑1.4
4/20 10:20	61.7	↑1.6
4/20 10:30	63.6	↑1.9
4/20 10:40	65.7	↑2.1
4/20 10:50	67.9	↑2.2
4/20 11:00	70.4	↑2.5
4/20 11:10	73.0	↑2.6
4/20 11:20	75.8	↑2.8
4/20 11:30	78.7	↑2.9
4/20 11:40	81.7	↑3.0
4/20 11:50	84.7	↑3.0
4/20 12:00	87.8	↑3.1
4/20 12:10	91.0	↑3.2
4/20 12:20	94.2	↑3.2
4/20 12:30	97.4	↑3.2
4/20 12:40	100.6	↑3.2
4/20 12:50	103.7	↑3.1
4/20 13:00	106.7	↑3.0
4/20 13:10	109.7	↑3.0
4/20 13:20	112.5	↑2.8
4/20 13:30	115.2	↑2.7
4/20 13:40	117.7	↑2.5
4/20 13:50	120.0	↑2.3
4/20 14:00	122.1	↑2.1
4/20 14:10	123.9	↑1.8
4/20 14:20	125.5	↑1.6
4/20 14:30	126.9	↑1.4
4/20 14:40	127.9	↑1.0
4/20 14:50	128.6	↑0.7
4/20 15:00	129.0	↑0.4	満潮
4/20 15:10	129.1	↑0.1
4/20 15:20	128.9	↓-0.2
4/20 15:30	128.4	↓-0.5
4/20 15:40	127.5	↓-0.9
4/20 15:50	126.4	↓-1.1
4/20 16:00	124.9	↓-1.5
4/20 16:10	123.2	↓-1.7
4/20 16:20	121.2	↓-2.0
4/20 16:30	118.9	↓-2.3
4/20 16:40	116.4	↓-2.5
4/20 16:50	113.7	↓-2.7
4/20 17:00	110.7	↓-3.0
4/20 17:10	107.6	↓-3.1
4/20 17:20	104.2	↓-3.4
4/20 17:30	100.8	↓-3.4
4/20 17:40	97.2	↓-3.6
4/20 17:50	93.4	↓-3.8
4/20 18:00	89.6	↓-3.8
4/20 18:10	85.7	↓-3.9
4/20 18:20	81.8	↓-3.9
4/20 18:30	77.8	↓-4.0	最大潮位差
4/20 18:40	73.9	↓-3.9
4/20 18:50	69.9	↓-4.0	最大潮位差
4/20 19:00	66.1	↓-3.8
4/20 19:10	62.3	↓-3.8
4/20 19:20	58.6	↓-3.7
4/20 19:30	55.1	↓-3.5
4/20 19:40	51.7	↓-3.4
4/20 19:50	48.5	↓-3.2
4/20 20:00	45.6	↓-2.9
4/20 20:10	42.9	↓-2.7
4/20 20:20	40.5	↓-2.4
4/20 20:30	38.4	↓-2.1
4/20 20:40	36.6	↓-1.8
4/20 20:50	35.1	↓-1.5
4/20 21:00	34.0	↓-1.1
4/20 21:10	33.2	↓-0.8
4/20 21:20	32.8	↓-0.4	干潮
4/20 21:30	32.7	↓-0.1
4/20 21:40	33.0	↑0.3
4/20 21:50	33.6	↑0.6
4/20 22:00	34.6	↑1.0
4/20 22:10	35.9	↑1.3
4/20 22:20	37.5	↑1.6
4/20 22:30	39.5	↑2.0
4/20 22:40	41.7	↑2.2
4/20 22:50	44.2	↑2.5
4/20 23:00	46.9	↑2.7
4/20 23:10	49.9	↑3.0
4/20 23:20	53.0	↑3.1
4/20 23:30	56.4	↑3.4
4/20 23:40	59.9	↑3.5
4/20 23:50	63.6	↑3.7