20 (水)	02:42	08:34	14:20	20:41
	110cm	52cm	105cm	32cm
中潮 出 04:59 入 18:17 出 03:42 入 15:12

日立（茨城）2039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	81.9	↑2.9
4/20 00:10	84.8	↑2.9
4/20 00:20	87.6	↑2.8
4/20 00:30	90.2	↑2.6
4/20 00:40	92.8	↑2.6
4/20 00:50	95.2	↑2.4
4/20 01:00	97.4	↑2.2
4/20 01:10	99.5	↑2.1
4/20 01:20	101.4	↑1.9
4/20 01:30	103.2	↑1.8
4/20 01:40	104.7	↑1.5
4/20 01:50	106.0	↑1.3
4/20 02:00	107.1	↑1.1
4/20 02:10	108.0	↑0.9
4/20 02:20	108.6	↑0.6
4/20 02:30	109.1	↑0.5
4/20 02:40	109.2	↑0.1	満潮
4/20 02:50	109.1	↓-0.1
4/20 03:00	108.8	↓-0.3
4/20 03:10	108.2	↓-0.6
4/20 03:20	107.3	↓-0.9
4/20 03:30	106.3	↓-1.0
4/20 03:40	105.0	↓-1.3
4/20 03:50	103.5	↓-1.5
4/20 04:00	101.7	↓-1.8
4/20 04:10	99.9	↓-1.8
4/20 04:20	97.8	↓-2.1
4/20 04:30	95.6	↓-2.2
4/20 04:40	93.3	↓-2.3
4/20 04:50	90.9	↓-2.4
4/20 05:00	88.4	↓-2.5
4/20 05:10	85.8	↓-2.6
4/20 05:20	83.2	↓-2.6
4/20 05:30	80.7	↓-2.5
4/20 05:40	78.1	↓-2.6
4/20 05:50	75.5	↓-2.6
4/20 06:00	73.1	↓-2.4
4/20 06:10	70.6	↓-2.5
4/20 06:20	68.3	↓-2.3
4/20 06:30	66.0	↓-2.3
4/20 06:40	63.9	↓-2.1
4/20 06:50	61.9	↓-2.0
4/20 07:00	60.1	↓-1.8
4/20 07:10	58.3	↓-1.8
4/20 07:20	56.8	↓-1.5
4/20 07:30	55.4	↓-1.4
4/20 07:40	54.2	↓-1.2
4/20 07:50	53.2	↓-1.0
4/20 08:00	52.4	↓-0.8
4/20 08:10	51.8	↓-0.6
4/20 08:20	51.4	↓-0.4
4/20 08:30	51.3	↓-0.1	干潮
4/20 08:40	51.3	0
4/20 08:50	51.6	↑0.3
4/20 09:00	52.1	↑0.5
4/20 09:10	52.8	↑0.7
4/20 09:20	53.8	↑1.0
4/20 09:30	54.9	↑1.1
4/20 09:40	56.3	↑1.4
4/20 09:50	57.8	↑1.5
4/20 10:00	59.5	↑1.7
4/20 10:10	61.4	↑1.9
4/20 10:20	63.4	↑2.0
4/20 10:30	65.6	↑2.2
4/20 10:40	67.8	↑2.2
4/20 10:50	70.1	↑2.3
4/20 11:00	72.5	↑2.4
4/20 11:10	74.9	↑2.4
4/20 11:20	77.4	↑2.5
4/20 11:30	79.8	↑2.4
4/20 11:40	82.2	↑2.4
4/20 11:50	84.6	↑2.4
4/20 12:00	86.9	↑2.3
4/20 12:10	89.1	↑2.2
4/20 12:20	91.2	↑2.1
4/20 12:30	93.2	↑2.0
4/20 12:40	95.1	↑1.9
4/20 12:50	96.9	↑1.8
4/20 13:00	98.5	↑1.6
4/20 13:10	99.9	↑1.4
4/20 13:20	101.2	↑1.3
4/20 13:30	102.3	↑1.1
4/20 13:40	103.3	↑1.0
4/20 13:50	104.0	↑0.7
4/20 14:00	104.5	↑0.5
4/20 14:10	104.8	↑0.3	満潮
4/20 14:20	104.9	↑0.1	満潮
4/20 14:30	104.8	↓-0.1
4/20 14:40	104.4	↓-0.4
4/20 14:50	103.8	↓-0.6
4/20 15:00	103.0	↓-0.8
4/20 15:10	101.9	↓-1.1
4/20 15:20	100.6	↓-1.3
4/20 15:30	99.1	↓-1.5
4/20 15:40	97.3	↓-1.8
4/20 15:50	95.4	↓-1.9
4/20 16:00	93.2	↓-2.2
4/20 16:10	90.8	↓-2.4
4/20 16:20	88.3	↓-2.5
4/20 16:30	85.7	↓-2.6
4/20 16:40	82.9	↓-2.8
4/20 16:50	80.0	↓-2.9
4/20 17:00	77.0	↓-3.0
4/20 17:10	74.0	↓-3.0
4/20 17:20	71.0	↓-3.0
4/20 17:30	67.9	↓-3.1
4/20 17:40	64.8	↓-3.1
4/20 17:50	61.8	↓-3.0
4/20 18:00	58.9	↓-2.9
4/20 18:10	56.0	↓-2.9
4/20 18:20	53.2	↓-2.8
4/20 18:30	50.5	↓-2.7
4/20 18:40	48.0	↓-2.5
4/20 18:50	45.5	↓-2.5
4/20 19:00	43.3	↓-2.2
4/20 19:10	41.2	↓-2.1
4/20 19:20	39.3	↓-1.9
4/20 19:30	37.6	↓-1.7
4/20 19:40	36.1	↓-1.5
4/20 19:50	34.8	↓-1.3
4/20 20:00	33.7	↓-1.1
4/20 20:10	32.8	↓-0.9
4/20 20:20	32.2	↓-0.6
4/20 20:30	31.8	↓-0.4
4/20 20:40	31.7	↓-0.1	干潮
4/20 20:50	31.9	↑0.2
4/20 21:00	32.3	↑0.4
4/20 21:10	32.9	↑0.6
4/20 21:20	33.8	↑0.9
4/20 21:30	35.0	↑1.2
4/20 21:40	36.5	↑1.5
4/20 21:50	38.2	↑1.7
4/20 22:00	40.1	↑1.9
4/20 22:10	42.2	↑2.1
4/20 22:20	44.6	↑2.4
4/20 22:30	47.2	↑2.6
4/20 22:40	49.9	↑2.7
4/20 22:50	52.8	↑2.9
4/20 23:00	55.8	↑3.0
4/20 23:10	59.0	↑3.2
4/20 23:20	62.2	↑3.2
4/20 23:30	65.5	↑3.3
4/20 23:40	68.8	↑3.3
4/20 23:50	72.2	↑3.4	最大潮位差