20 (木)	04:24	10:56	17:45	23:16
	113cm	1cm	117cm	52cm
大潮 出 04:59 入 18:17 出 06:04 入 19:57 潮干狩り ◎ 08:40～13:13

那珂湊（茨城）2034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	52.1	↑2.1
4/20 00:10	54.3	↑2.2
4/20 00:20	56.8	↑2.5
4/20 00:30	59.4	↑2.6
4/20 00:40	62.1	↑2.7
4/20 00:50	65.0	↑2.9
4/20 01:00	68.0	↑3.0
4/20 01:10	71.0	↑3.0
4/20 01:20	74.2	↑3.2
4/20 01:30	77.3	↑3.1
4/20 01:40	80.4	↑3.1
4/20 01:50	83.6	↑3.2
4/20 02:00	86.7	↑3.1
4/20 02:10	89.7	↑3.0
4/20 02:20	92.6	↑2.9
4/20 02:30	95.4	↑2.8
4/20 02:40	98.1	↑2.7
4/20 02:50	100.6	↑2.5
4/20 03:00	103.0	↑2.4
4/20 03:10	105.1	↑2.1
4/20 03:20	107.0	↑1.9
4/20 03:30	108.7	↑1.7
4/20 03:40	110.1	↑1.4
4/20 03:50	111.3	↑1.2
4/20 04:00	112.1	↑0.8
4/20 04:10	112.7	↑0.6
4/20 04:20	112.9	↑0.2	満潮
4/20 04:30	112.9	0
4/20 04:40	112.5	↓-0.4
4/20 04:50	111.8	↓-0.7
4/20 05:00	110.7	↓-1.1
4/20 05:10	109.4	↓-1.3
4/20 05:20	107.7	↓-1.7
4/20 05:30	105.6	↓-2.1
4/20 05:40	103.3	↓-2.3
4/20 05:50	100.7	↓-2.6
4/20 06:00	97.8	↓-2.9
4/20 06:10	94.6	↓-3.2
4/20 06:20	91.1	↓-3.5
4/20 06:30	87.5	↓-3.6
4/20 06:40	83.6	↓-3.9
4/20 06:50	79.5	↓-4.1
4/20 07:00	75.3	↓-4.2
4/20 07:10	70.9	↓-4.4
4/20 07:20	66.4	↓-4.5
4/20 07:30	61.9	↓-4.5
4/20 07:40	57.3	↓-4.6	最大潮位差
4/20 07:50	52.7	↓-4.6	最大潮位差
4/20 08:00	48.1	↓-4.6	最大潮位差
4/20 08:10	43.6	↓-4.5
4/20 08:20	39.2	↓-4.4
4/20 08:30	34.8	↓-4.4
4/20 08:40	30.7	↓-4.1
4/20 08:50	26.6	↓-4.1
4/20 09:00	22.8	↓-3.8
4/20 09:10	19.2	↓-3.6
4/20 09:20	15.9	↓-3.3
4/20 09:30	12.8	↓-3.1
4/20 09:40	10.1	↓-2.7
4/20 09:50	7.6	↓-2.5
4/20 10:00	5.5	↓-2.1
4/20 10:10	3.7	↓-1.8
4/20 10:20	2.2	↓-1.5
4/20 10:30	1.1	↓-1.1
4/20 10:40	0.4	↓-0.7
4/20 10:50	0.1	↓-0.3	干潮
4/20 11:00	0.1	0
4/20 11:10	0.5	↑0.4
4/20 11:20	1.2	↑0.7
4/20 11:30	2.3	↑1.1
4/20 11:40	3.7	↑1.4
4/20 11:50	5.5	↑1.8
4/20 12:00	7.6	↑2.1
4/20 12:10	10.0	↑2.4
4/20 12:20	12.7	↑2.7
4/20 12:30	15.7	↑3.0
4/20 12:40	18.9	↑3.2
4/20 12:50	22.3	↑3.4
4/20 13:00	26.0	↑3.7
4/20 13:10	29.8	↑3.8
4/20 13:20	33.8	↑4.0
4/20 13:30	38.0	↑4.2
4/20 13:40	42.3	↑4.3
4/20 13:50	46.6	↑4.3
4/20 14:00	51.0	↑4.4
4/20 14:10	55.5	↑4.5
4/20 14:20	60.0	↑4.5
4/20 14:30	64.4	↑4.4
4/20 14:40	68.9	↑4.5
4/20 14:50	73.2	↑4.3
4/20 15:00	77.5	↑4.3
4/20 15:10	81.7	↑4.2
4/20 15:20	85.7	↑4.0
4/20 15:30	89.5	↑3.8
4/20 15:40	93.2	↑3.7
4/20 15:50	96.7	↑3.5
4/20 16:00	99.9	↑3.2
4/20 16:10	102.9	↑3.0
4/20 16:20	105.7	↑2.8
4/20 16:30	108.2	↑2.5
4/20 16:40	110.3	↑2.1
4/20 16:50	112.2	↑1.9
4/20 17:00	113.8	↑1.6
4/20 17:10	115.0	↑1.2
4/20 17:20	116.0	↑1.0
4/20 17:30	116.6	↑0.6
4/20 17:40	116.9	↑0.3	満潮
4/20 17:50	116.8	↓-0.1
4/20 18:00	116.4	↓-0.4
4/20 18:10	115.8	↓-0.6
4/20 18:20	114.8	↓-1.0
4/20 18:30	113.5	↓-1.3
4/20 18:40	112.0	↓-1.5
4/20 18:50	110.2	↓-1.8
4/20 19:00	108.1	↓-2.1
4/20 19:10	105.8	↓-2.3
4/20 19:20	103.4	↓-2.4
4/20 19:30	100.7	↓-2.7
4/20 19:40	97.9	↓-2.8
4/20 19:50	95.0	↓-2.9
4/20 20:00	92.0	↓-3.0
4/20 20:10	88.9	↓-3.1
4/20 20:20	85.8	↓-3.1
4/20 20:30	82.7	↓-3.1
4/20 20:40	79.6	↓-3.1
4/20 20:50	76.6	↓-3.0
4/20 21:00	73.6	↓-3.0
4/20 21:10	70.7	↓-2.9
4/20 21:20	67.9	↓-2.8
4/20 21:30	65.3	↓-2.6
4/20 21:40	62.9	↓-2.4
4/20 21:50	60.6	↓-2.3
4/20 22:00	58.6	↓-2.0
4/20 22:10	56.8	↓-1.8
4/20 22:20	55.2	↓-1.6
4/20 22:30	53.9	↓-1.3
4/20 22:40	52.8	↓-1.1
4/20 22:50	52.0	↓-0.8
4/20 23:00	51.4	↓-0.6
4/20 23:10	51.2	↓-0.2	干潮
4/20 23:20	51.2	0
4/20 23:30	51.4	↑0.2
4/20 23:40	52.0	↑0.6
4/20 23:50	52.7	↑0.7