20 (金)	06:03	00:33	21:35	13:56
	119cm	85cm	97cm	16cm
小潮 出 04:59 入 18:17 出 09:10 入 23:59 潮干狩り ◎ 11:49～16:04

日立（茨城）2029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	84.6	↓-0.4
4/20 00:10	84.3	↓-0.3
4/20 00:20	84.1	↓-0.2
4/20 00:30	84.0	↓-0.1	干潮
4/20 00:40	84.1	↑0.1
4/20 00:50	84.2	↑0.1
4/20 01:00	84.5	↑0.3
4/20 01:10	84.9	↑0.4
4/20 01:20	85.4	↑0.5
4/20 01:30	86.1	↑0.7
4/20 01:40	86.9	↑0.8
4/20 01:50	87.7	↑0.8
4/20 02:00	88.7	↑1.0
4/20 02:10	89.9	↑1.2
4/20 02:20	91.1	↑1.2
4/20 02:30	92.4	↑1.3
4/20 02:40	93.8	↑1.4
4/20 02:50	95.3	↑1.5
4/20 03:00	96.8	↑1.5
4/20 03:10	98.4	↑1.6
4/20 03:20	100.1	↑1.7
4/20 03:30	101.7	↑1.6
4/20 03:40	103.4	↑1.7
4/20 03:50	105.1	↑1.7
4/20 04:00	106.8	↑1.7
4/20 04:10	108.4	↑1.6
4/20 04:20	109.9	↑1.5
4/20 04:30	111.4	↑1.5
4/20 04:40	112.8	↑1.4
4/20 04:50	114.1	↑1.3
4/20 05:00	115.2	↑1.1
4/20 05:10	116.3	↑1.1
4/20 05:20	117.1	↑0.8
4/20 05:30	117.8	↑0.7
4/20 05:40	118.3	↑0.5
4/20 05:50	118.7	↑0.4
4/20 06:00	118.8	↑0.1	満潮
4/20 06:10	118.8	0
4/20 06:20	118.5	↓-0.3
4/20 06:30	118.1	↓-0.4
4/20 06:40	117.4	↓-0.7
4/20 06:50	116.5	↓-0.9
4/20 07:00	115.5	↓-1.0
4/20 07:10	114.2	↓-1.3
4/20 07:20	112.7	↓-1.5
4/20 07:30	111.0	↓-1.7
4/20 07:40	109.2	↓-1.8
4/20 07:50	107.1	↓-2.1
4/20 08:00	104.9	↓-2.2
4/20 08:10	102.5	↓-2.4
4/20 08:20	99.9	↓-2.6
4/20 08:30	97.2	↓-2.7
4/20 08:40	94.4	↓-2.8
4/20 08:50	91.4	↓-3.0
4/20 09:00	88.2	↓-3.2
4/20 09:10	85.0	↓-3.2
4/20 09:20	81.7	↓-3.3
4/20 09:30	78.3	↓-3.4
4/20 09:40	74.9	↓-3.4
4/20 09:50	71.4	↓-3.5
4/20 10:00	67.9	↓-3.5
4/20 10:10	64.3	↓-3.6	最大潮位差
4/20 10:20	60.8	↓-3.5
4/20 10:30	57.4	↓-3.4
4/20 10:40	53.9	↓-3.5
4/20 10:50	50.6	↓-3.3
4/20 11:00	47.3	↓-3.3
4/20 11:10	44.1	↓-3.2
4/20 11:20	41.0	↓-3.1
4/20 11:30	38.1	↓-2.9
4/20 11:40	35.3	↓-2.8
4/20 11:50	32.7	↓-2.6
4/20 12:00	30.2	↓-2.5
4/20 12:10	27.9	↓-2.3
4/20 12:20	25.8	↓-2.1
4/20 12:30	23.9	↓-1.9
4/20 12:40	22.1	↓-1.8
4/20 12:50	20.6	↓-1.5
4/20 13:00	19.3	↓-1.3
4/20 13:10	18.2	↓-1.1
4/20 13:20	17.3	↓-0.9
4/20 13:30	16.6	↓-0.7
4/20 13:40	16.2	↓-0.4
4/20 13:50	15.9	↓-0.3	干潮
4/20 14:00	15.9	0
4/20 14:10	16.1	↑0.2
4/20 14:20	16.6	↑0.5
4/20 14:30	17.3	↑0.7
4/20 14:40	18.1	↑0.8
4/20 14:50	19.2	↑1.1
4/20 15:00	20.5	↑1.3
4/20 15:10	22.1	↑1.6
4/20 15:20	23.8	↑1.7
4/20 15:30	25.6	↑1.8
4/20 15:40	27.7	↑2.1
4/20 15:50	29.9	↑2.2
4/20 16:00	32.3	↑2.4
4/20 16:10	34.7	↑2.4
4/20 16:20	37.3	↑2.6
4/20 16:30	40.0	↑2.7
4/20 16:40	42.8	↑2.8
4/20 16:50	45.6	↑2.8
4/20 17:00	48.4	↑2.8
4/20 17:10	51.3	↑2.9
4/20 17:20	54.2	↑2.9
4/20 17:30	57.0	↑2.8
4/20 17:40	59.9	↑2.9
4/20 17:50	62.7	↑2.8
4/20 18:00	65.4	↑2.7
4/20 18:10	68.1	↑2.7
4/20 18:20	70.7	↑2.6
4/20 18:30	73.3	↑2.6
4/20 18:40	75.7	↑2.4
4/20 18:50	78.0	↑2.3
4/20 19:00	80.2	↑2.2
4/20 19:10	82.2	↑2.0
4/20 19:20	84.2	↑2.0
4/20 19:30	86.0	↑1.8
4/20 19:40	87.7	↑1.7
4/20 19:50	89.2	↑1.5
4/20 20:00	90.6	↑1.4
4/20 20:10	91.8	↑1.2
4/20 20:20	92.9	↑1.1
4/20 20:30	93.9	↑1.0
4/20 20:40	94.6	↑0.7
4/20 20:50	95.3	↑0.7
4/20 21:00	95.8	↑0.5
4/20 21:10	96.2	↑0.4
4/20 21:20	96.4	↑0.2
4/20 21:30	96.5	↑0.1	満潮
4/20 21:40	96.5	0
4/20 21:50	96.4	↓-0.1
4/20 22:00	96.1	↓-0.3
4/20 22:10	95.8	↓-0.3
4/20 22:20	95.4	↓-0.4
4/20 22:30	95.0	↓-0.4
4/20 22:40	94.5	↓-0.5
4/20 22:50	94.0	↓-0.5
4/20 23:00	93.4	↓-0.6
4/20 23:10	92.8	↓-0.6
4/20 23:20	92.3	↓-0.5
4/20 23:30	91.7	↓-0.6
4/20 23:40	91.1	↓-0.6
4/20 23:50	90.6	↓-0.5