20 (木)	02:30	08:29	14:17	20:29
	121cm	63cm	114cm	48cm
若潮 出 05:04 入 18:18 出 02:27 入 14:08

館山（千葉）2028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	98.3	↑2.6
4/20 00:10	100.8	↑2.5
4/20 00:20	103.2	↑2.4
4/20 00:30	105.5	↑2.3
4/20 00:40	107.7	↑2.2
4/20 00:50	109.8	↑2.1
4/20 01:00	111.7	↑1.9
4/20 01:10	113.5	↑1.8
4/20 01:20	115.0	↑1.5
4/20 01:30	116.4	↑1.4
4/20 01:40	117.6	↑1.2
4/20 01:50	118.6	↑1.0
4/20 02:00	119.4	↑0.8
4/20 02:10	119.9	↑0.5
4/20 02:20	120.2	↑0.3	満潮
4/20 02:30	120.3	↑0.1	満潮
4/20 02:40	120.2	↓-0.1
4/20 02:50	119.9	↓-0.3
4/20 03:00	119.3	↓-0.6
4/20 03:10	118.6	↓-0.7
4/20 03:20	117.6	↓-1.0
4/20 03:30	116.5	↓-1.1
4/20 03:40	115.2	↓-1.3
4/20 03:50	113.7	↓-1.5
4/20 04:00	112.1	↓-1.6
4/20 04:10	110.3	↓-1.8
4/20 04:20	108.4	↓-1.9
4/20 04:30	106.3	↓-2.1
4/20 04:40	104.2	↓-2.1
4/20 04:50	102.0	↓-2.2
4/20 05:00	99.6	↓-2.4
4/20 05:10	97.3	↓-2.3
4/20 05:20	94.8	↓-2.5
4/20 05:30	92.3	↓-2.5
4/20 05:40	89.8	↓-2.5
4/20 05:50	87.3	↓-2.5
4/20 06:00	84.7	↓-2.6
4/20 06:10	82.3	↓-2.4
4/20 06:20	79.8	↓-2.5
4/20 06:30	77.5	↓-2.3
4/20 06:40	75.2	↓-2.3
4/20 06:50	73.1	↓-2.1
4/20 07:00	71.1	↓-2.0
4/20 07:10	69.2	↓-1.9
4/20 07:20	67.6	↓-1.6
4/20 07:30	66.1	↓-1.5
4/20 07:40	64.9	↓-1.2
4/20 07:50	63.9	↓-1.0
4/20 08:00	63.1	↓-0.8
4/20 08:10	62.5	↓-0.6
4/20 08:20	62.2	↓-0.3	干潮
4/20 08:30	62.1	↓-0.1
4/20 08:40	62.2	↑0.1
4/20 08:50	62.6	↑0.4
4/20 09:00	63.2	↑0.6
4/20 09:10	64.1	↑0.9
4/20 09:20	65.1	↑1.0
4/20 09:30	66.3	↑1.2
4/20 09:40	67.6	↑1.3
4/20 09:50	69.1	↑1.5
4/20 10:00	70.8	↑1.7
4/20 10:10	72.6	↑1.8
4/20 10:20	74.4	↑1.8
4/20 10:30	76.4	↑2.0
4/20 10:40	78.4	↑2.0
4/20 10:50	80.6	↑2.2
4/20 11:00	82.7	↑2.1
4/20 11:10	84.9	↑2.2
4/20 11:20	87.1	↑2.2
4/20 11:30	89.3	↑2.2
4/20 11:40	91.5	↑2.2
4/20 11:50	93.7	↑2.2
4/20 12:00	95.9	↑2.2
4/20 12:10	98.0	↑2.1
4/20 12:20	100.0	↑2.0
4/20 12:30	102.0	↑2.0
4/20 12:40	103.8	↑1.8
4/20 12:50	105.5	↑1.7
4/20 13:00	107.1	↑1.6
4/20 13:10	108.5	↑1.4
4/20 13:20	109.8	↑1.3
4/20 13:30	110.9	↑1.1
4/20 13:40	111.8	↑0.9
4/20 13:50	112.5	↑0.7
4/20 14:00	112.9	↑0.4
4/20 14:10	113.2	↑0.3	満潮
4/20 14:20	113.2	0
4/20 14:30	113.0	↓-0.2
4/20 14:40	112.6	↓-0.4
4/20 14:50	111.9	↓-0.7
4/20 15:00	111.1	↓-0.8
4/20 15:10	110.0	↓-1.1
4/20 15:20	108.7	↓-1.3
4/20 15:30	107.2	↓-1.5
4/20 15:40	105.6	↓-1.6
4/20 15:50	103.8	↓-1.8
4/20 16:00	101.8	↓-2.0
4/20 16:10	99.7	↓-2.1
4/20 16:20	97.5	↓-2.2
4/20 16:30	95.2	↓-2.3
4/20 16:40	92.8	↓-2.4
4/20 16:50	90.3	↓-2.5
4/20 17:00	87.7	↓-2.6
4/20 17:10	85.0	↓-2.7
4/20 17:20	82.4	↓-2.6
4/20 17:30	79.7	↓-2.7
4/20 17:40	76.9	↓-2.8
4/20 17:50	74.2	↓-2.7
4/20 18:00	71.5	↓-2.7
4/20 18:10	68.9	↓-2.6
4/20 18:20	66.3	↓-2.6
4/20 18:30	63.8	↓-2.5
4/20 18:40	61.4	↓-2.4
4/20 18:50	59.1	↓-2.3
4/20 19:00	57.0	↓-2.1
4/20 19:10	55.0	↓-2.0
4/20 19:20	53.2	↓-1.8
4/20 19:30	51.6	↓-1.6
4/20 19:40	50.2	↓-1.4
4/20 19:50	49.1	↓-1.1
4/20 20:00	48.2	↓-0.9
4/20 20:10	47.6	↓-0.6
4/20 20:20	47.2	↓-0.4	干潮
4/20 20:30	47.1	↓-0.1
4/20 20:40	47.3	↑0.2
4/20 20:50	47.8	↑0.5
4/20 21:00	48.5	↑0.7
4/20 21:10	49.5	↑1.0
4/20 21:20	50.7	↑1.2
4/20 21:30	52.1	↑1.4
4/20 21:40	53.8	↑1.7
4/20 21:50	55.7	↑1.9
4/20 22:00	57.7	↑2.0
4/20 22:10	60.0	↑2.3
4/20 22:20	62.4	↑2.4
4/20 22:30	64.9	↑2.5
4/20 22:40	67.6	↑2.7
4/20 22:50	70.3	↑2.7
4/20 23:00	73.2	↑2.9
4/20 23:10	76.1	↑2.9
4/20 23:20	79.1	↑3.0
4/20 23:30	82.2	↑3.1	最大潮位差
4/20 23:40	85.2	↑3.0
4/20 23:50	88.3	↑3.1	最大潮位差