20 (日)	03:41	09:59	16:39	22:25
	110cm	8cm	121cm	44cm
大潮 出 04:59 入 18:17 出 04:56 入 18:32 潮干狩り ◎ 08:01～11:57

那珂湊（茨城）2042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	56.5	↑3.1
4/20 00:10	59.7	↑3.2
4/20 00:20	63.0	↑3.3
4/20 00:30	66.3	↑3.3
4/20 00:40	69.7	↑3.4
4/20 00:50	73.1	↑3.4
4/20 01:00	76.5	↑3.4
4/20 01:10	79.9	↑3.4
4/20 01:20	83.2	↑3.3
4/20 01:30	86.4	↑3.2
4/20 01:40	89.4	↑3.0
4/20 01:50	92.4	↑3.0
4/20 02:00	95.1	↑2.7
4/20 02:10	97.7	↑2.6
4/20 02:20	100.1	↑2.4
4/20 02:30	102.3	↑2.2
4/20 02:40	104.2	↑1.9
4/20 02:50	105.8	↑1.6
4/20 03:00	107.2	↑1.4
4/20 03:10	108.3	↑1.1
4/20 03:20	109.0	↑0.7
4/20 03:30	109.5	↑0.5
4/20 03:40	109.7	↑0.2	満潮
4/20 03:50	109.5	↓-0.2
4/20 04:00	109.0	↓-0.5
4/20 04:10	108.2	↓-0.8
4/20 04:20	107.0	↓-1.2
4/20 04:30	105.6	↓-1.4
4/20 04:40	103.8	↓-1.8
4/20 04:50	101.7	↓-2.1
4/20 05:00	99.3	↓-2.4
4/20 05:10	96.7	↓-2.6
4/20 05:20	93.8	↓-2.9
4/20 05:30	90.6	↓-3.2
4/20 05:40	87.2	↓-3.4
4/20 05:50	83.6	↓-3.6
4/20 06:00	79.8	↓-3.8
4/20 06:10	75.9	↓-3.9
4/20 06:20	71.9	↓-4.0
4/20 06:30	67.7	↓-4.2
4/20 06:40	63.5	↓-4.2
4/20 06:50	59.2	↓-4.3
4/20 07:00	55.0	↓-4.2
4/20 07:10	50.7	↓-4.3
4/20 07:20	46.5	↓-4.2
4/20 07:30	42.4	↓-4.1
4/20 07:40	38.4	↓-4.0
4/20 07:50	34.6	↓-3.8
4/20 08:00	30.9	↓-3.7
4/20 08:10	27.4	↓-3.5
4/20 08:20	24.1	↓-3.3
4/20 08:30	21.0	↓-3.1
4/20 08:40	18.3	↓-2.7
4/20 08:50	15.8	↓-2.5
4/20 09:00	13.6	↓-2.2
4/20 09:10	11.7	↓-1.9
4/20 09:20	10.2	↓-1.5
4/20 09:30	9.0	↓-1.2
4/20 09:40	8.2	↓-0.8
4/20 09:50	7.7	↓-0.5	干潮
4/20 10:00	7.6	↓-0.1
4/20 10:10	7.8	↑0.2
4/20 10:20	8.4	↑0.6
4/20 10:30	9.3	↑0.9
4/20 10:40	10.6	↑1.3
4/20 10:50	12.3	↑1.7
4/20 11:00	14.2	↑1.9
4/20 11:10	16.5	↑2.3
4/20 11:20	19.1	↑2.6
4/20 11:30	21.9	↑2.8
4/20 11:40	25.0	↑3.1
4/20 11:50	28.4	↑3.4
4/20 12:00	31.9	↑3.5
4/20 12:10	35.7	↑3.8
4/20 12:20	39.6	↑3.9
4/20 12:30	43.7	↑4.1
4/20 12:40	47.9	↑4.2
4/20 12:50	52.2	↑4.3
4/20 13:00	56.6	↑4.4
4/20 13:10	61.0	↑4.4
4/20 13:20	65.5	↑4.5	最大潮位差
4/20 13:30	69.9	↑4.4
4/20 13:40	74.3	↑4.4
4/20 13:50	78.6	↑4.3
4/20 14:00	82.8	↑4.2
4/20 14:10	86.9	↑4.1
4/20 14:20	90.8	↑3.9
4/20 14:30	94.6	↑3.8
4/20 14:40	98.2	↑3.6
4/20 14:50	101.6	↑3.4
4/20 15:00	104.8	↑3.2
4/20 15:10	107.7	↑2.9
4/20 15:20	110.3	↑2.6
4/20 15:30	112.6	↑2.3
4/20 15:40	114.7	↑2.1
4/20 15:50	116.4	↑1.7
4/20 16:00	117.8	↑1.4
4/20 16:10	118.9	↑1.1
4/20 16:20	119.7	↑0.8
4/20 16:30	120.1	↑0.4	満潮
4/20 16:40	120.2	↑0.1
4/20 16:50	119.9	↓-0.3
4/20 17:00	119.4	↓-0.5
4/20 17:10	118.5	↓-0.9
4/20 17:20	117.2	↓-1.3
4/20 17:30	115.7	↓-1.5
4/20 17:40	113.9	↓-1.8
4/20 17:50	111.9	↓-2.0
4/20 18:00	109.5	↓-2.4
4/20 18:10	107.0	↓-2.5
4/20 18:20	104.2	↓-2.8
4/20 18:30	101.3	↓-2.9
4/20 18:40	98.1	↓-3.2
4/20 18:50	94.9	↓-3.2
4/20 19:00	91.5	↓-3.4
4/20 19:10	88.1	↓-3.4
4/20 19:20	84.6	↓-3.5
4/20 19:30	81.1	↓-3.5
4/20 19:40	77.6	↓-3.5
4/20 19:50	74.2	↓-3.4
4/20 20:00	70.8	↓-3.4
4/20 20:10	67.5	↓-3.3
4/20 20:20	64.3	↓-3.2
4/20 20:30	61.3	↓-3.0
4/20 20:40	58.4	↓-2.9
4/20 20:50	55.8	↓-2.6
4/20 21:00	53.3	↓-2.5
4/20 21:10	51.1	↓-2.2
4/20 21:20	49.1	↓-2.0
4/20 21:30	47.4	↓-1.7
4/20 21:40	45.9	↓-1.5
4/20 21:50	44.8	↓-1.1
4/20 22:00	43.9	↓-0.9
4/20 22:10	43.3	↓-0.6
4/20 22:20	43.1	↓-0.2	干潮
4/20 22:30	43.1	0
4/20 22:40	43.4	↑0.3
4/20 22:50	44.0	↑0.6
4/20 23:00	44.9	↑0.9
4/20 23:10	46.0	↑1.1
4/20 23:20	47.4	↑1.4
4/20 23:30	49.1	↑1.7
4/20 23:40	51.0	↑1.9
4/20 23:50	53.1	↑2.1