20 (木)	06:23	00:05	18:43	12:36
	112cm	30cm	112cm	27cm
若潮 出 05:45 入 18:59 出 03:09 入 14:51 潮干狩り ○ 11:48～13:24

大河内湾（長崎）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	29.6	↓-0.2	干潮
4/20 00:10	29.6	0
4/20 00:20	29.9	↑0.3
4/20 00:30	30.5	↑0.6
4/20 00:40	31.3	↑0.8
4/20 00:50	32.4	↑1.1
4/20 01:00	33.8	↑1.4
4/20 01:10	35.4	↑1.6
4/20 01:20	37.2	↑1.8
4/20 01:30	39.3	↑2.1
4/20 01:40	41.6	↑2.3
4/20 01:50	44.1	↑2.5
4/20 02:00	46.7	↑2.6
4/20 02:10	49.6	↑2.9
4/20 02:20	52.6	↑3.0
4/20 02:30	55.7	↑3.1
4/20 02:40	58.9	↑3.2
4/20 02:50	62.2	↑3.3
4/20 03:00	65.5	↑3.3
4/20 03:10	68.9	↑3.4
4/20 03:20	72.3	↑3.4
4/20 03:30	75.7	↑3.4
4/20 03:40	79.1	↑3.4
4/20 03:50	82.4	↑3.3
4/20 04:00	85.6	↑3.2
4/20 04:10	88.7	↑3.1
4/20 04:20	91.7	↑3.0
4/20 04:30	94.6	↑2.9
4/20 04:40	97.3	↑2.7
4/20 04:50	99.8	↑2.5
4/20 05:00	102.1	↑2.3
4/20 05:10	104.2	↑2.1
4/20 05:20	106.0	↑1.8
4/20 05:30	107.6	↑1.6
4/20 05:40	109.0	↑1.4
4/20 05:50	110.0	↑1.0
4/20 06:00	110.8	↑0.8
4/20 06:10	111.3	↑0.5
4/20 06:20	111.5	↑0.2	満潮
4/20 06:30	111.4	↓-0.1
4/20 06:40	111.0	↓-0.4
4/20 06:50	110.4	↓-0.6
4/20 07:00	109.4	↓-1.0
4/20 07:10	108.2	↓-1.2
4/20 07:20	106.7	↓-1.5
4/20 07:30	104.9	↓-1.8
4/20 07:40	102.8	↓-2.1
4/20 07:50	100.6	↓-2.2
4/20 08:00	98.1	↓-2.5
4/20 08:10	95.4	↓-2.7
4/20 08:20	92.5	↓-2.9
4/20 08:30	89.5	↓-3.0
4/20 08:40	86.3	↓-3.2
4/20 08:50	82.9	↓-3.4
4/20 09:00	79.5	↓-3.4
4/20 09:10	76.0	↓-3.5
4/20 09:20	72.5	↓-3.5
4/20 09:30	68.9	↓-3.6
4/20 09:40	65.3	↓-3.6
4/20 09:50	61.8	↓-3.5
4/20 10:00	58.3	↓-3.5
4/20 10:10	54.8	↓-3.5
4/20 10:20	51.5	↓-3.3
4/20 10:30	48.3	↓-3.2
4/20 10:40	45.2	↓-3.1
4/20 10:50	42.3	↓-2.9
4/20 11:00	39.6	↓-2.7
4/20 11:10	37.1	↓-2.5
4/20 11:20	34.8	↓-2.3
4/20 11:30	32.8	↓-2.0
4/20 11:40	31.1	↓-1.7
4/20 11:50	29.6	↓-1.5
4/20 12:00	28.3	↓-1.3
4/20 12:10	27.4	↓-0.9
4/20 12:20	26.8	↓-0.6
4/20 12:30	26.5	↓-0.3	干潮
4/20 12:40	26.5	0
4/20 12:50	26.7	↑0.2
4/20 13:00	27.3	↑0.6
4/20 13:10	28.2	↑0.9
4/20 13:20	29.4	↑1.2
4/20 13:30	30.9	↑1.5
4/20 13:40	32.7	↑1.8
4/20 13:50	34.7	↑2.0
4/20 14:00	37.0	↑2.3
4/20 14:10	39.5	↑2.5
4/20 14:20	42.2	↑2.7
4/20 14:30	45.1	↑2.9
4/20 14:40	48.2	↑3.1
4/20 14:50	51.5	↑3.3
4/20 15:00	54.9	↑3.4
4/20 15:10	58.3	↑3.4
4/20 15:20	61.9	↑3.6
4/20 15:30	65.5	↑3.6
4/20 15:40	69.2	↑3.7
4/20 15:50	72.8	↑3.6
4/20 16:00	76.4	↑3.6
4/20 16:10	80.0	↑3.6
4/20 16:20	83.5	↑3.5
4/20 16:30	86.9	↑3.4
4/20 16:40	90.2	↑3.3
4/20 16:50	93.3	↑3.1
4/20 17:00	96.2	↑2.9
4/20 17:10	98.9	↑2.7
4/20 17:20	101.4	↑2.5
4/20 17:30	103.7	↑2.3
4/20 17:40	105.7	↑2.0
4/20 17:50	107.5	↑1.8
4/20 18:00	108.9	↑1.4
4/20 18:10	110.1	↑1.2
4/20 18:20	110.9	↑0.8
4/20 18:30	111.5	↑0.6
4/20 18:40	111.7	↑0.2	満潮
4/20 18:50	111.6	↓-0.1
4/20 19:00	111.2	↓-0.4
4/20 19:10	110.4	↓-0.8
4/20 19:20	109.4	↓-1.0
4/20 19:30	108.0	↓-1.4
4/20 19:40	106.4	↓-1.6
4/20 19:50	104.4	↓-2.0
4/20 20:00	102.2	↓-2.2
4/20 20:10	99.7	↓-2.5
4/20 20:20	97.0	↓-2.7
4/20 20:30	94.0	↓-3.0
4/20 20:40	90.9	↓-3.1
4/20 20:50	87.6	↓-3.3
4/20 21:00	84.1	↓-3.5
4/20 21:10	80.5	↓-3.6
4/20 21:20	76.8	↓-3.7
4/20 21:30	73.0	↓-3.8
4/20 21:40	69.2	↓-3.8
4/20 21:50	65.3	↓-3.9	最大潮位差
4/20 22:00	61.4	↓-3.9	最大潮位差
4/20 22:10	57.6	↓-3.8
4/20 22:20	53.9	↓-3.7
4/20 22:30	50.2	↓-3.7
4/20 22:40	46.7	↓-3.5
4/20 22:50	43.3	↓-3.4
4/20 23:00	40.0	↓-3.3
4/20 23:10	37.0	↓-3.0
4/20 23:20	34.2	↓-2.8
4/20 23:30	31.6	↓-2.6
4/20 23:40	29.3	↓-2.3
4/20 23:50	27.3	↓-2.0