18 (金)	01:57	03:39	09:52	18:45
	88cm	87cm	114cm	20cm
若潮 出 06:23 入 17:22 出 02:17 入 12:13

日立（茨城）2039年02月18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
2/18 00:00	83.8	↑0.8
2/18 00:10	84.5	↑0.7
2/18 00:20	85.2	↑0.7
2/18 00:30	85.7	↑0.5
2/18 00:40	86.2	↑0.5
2/18 00:50	86.6	↑0.4
2/18 01:00	87.0	↑0.4
2/18 01:10	87.3	↑0.3
2/18 01:20	87.5	↑0.2
2/18 01:30	87.6	↑0.1
2/18 01:40	87.7	↑0.1
2/18 01:50	87.8	↑0.1	満潮
2/18 02:00	87.8	0
2/18 02:10	87.8	0
2/18 02:20	87.7	↓-0.1
2/18 02:30	87.6	↓-0.1
2/18 02:40	87.5	↓-0.1
2/18 02:50	87.3	↓-0.2
2/18 03:00	87.2	↓-0.1
2/18 03:10	87.1	↓-0.1
2/18 03:20	87.0	↓-0.1
2/18 03:30	87.0	0	干潮
2/18 03:40	87.0	0
2/18 03:50	87.0	0
2/18 04:00	87.1	↑0.1
2/18 04:10	87.2	↑0.1
2/18 04:20	87.5	↑0.3
2/18 04:30	87.8	↑0.3
2/18 04:40	88.2	↑0.4
2/18 04:50	88.6	↑0.4
2/18 05:00	89.2	↑0.6
2/18 05:10	89.8	↑0.6
2/18 05:20	90.5	↑0.7
2/18 05:30	91.2	↑0.7
2/18 05:40	92.0	↑0.8
2/18 05:50	92.9	↑0.9
2/18 06:00	93.9	↑1.0
2/18 06:10	94.9	↑1.0
2/18 06:20	95.9	↑1.0
2/18 06:30	96.9	↑1.0
2/18 06:40	98.0	↑1.1
2/18 06:50	99.1	↑1.1
2/18 07:00	100.2	↑1.1
2/18 07:10	101.3	↑1.1
2/18 07:20	102.4	↑1.1
2/18 07:30	103.5	↑1.1
2/18 07:40	104.6	↑1.1
2/18 07:50	105.7	↑1.1
2/18 08:00	106.7	↑1.0
2/18 08:10	107.7	↑1.0
2/18 08:20	108.6	↑0.9
2/18 08:30	109.5	↑0.9
2/18 08:40	110.3	↑0.8
2/18 08:50	111.0	↑0.7
2/18 09:00	111.6	↑0.6
2/18 09:10	112.2	↑0.6
2/18 09:20	112.6	↑0.4
2/18 09:30	112.9	↑0.3
2/18 09:40	113.1	↑0.2
2/18 09:50	113.2	↑0.1	満潮
2/18 10:00	113.1	↓-0.1
2/18 10:10	112.9	↓-0.2
2/18 10:20	112.6	↓-0.3
2/18 10:30	112.1	↓-0.5
2/18 10:40	111.5	↓-0.6
2/18 10:50	110.7	↓-0.8
2/18 11:00	109.8	↓-0.9
2/18 11:10	108.7	↓-1.1
2/18 11:20	107.5	↓-1.2
2/18 11:30	106.2	↓-1.3
2/18 11:40	104.7	↓-1.5
2/18 11:50	103.1	↓-1.6
2/18 12:00	101.4	↓-1.7
2/18 12:10	99.5	↓-1.9
2/18 12:20	97.6	↓-1.9
2/18 12:30	95.6	↓-2.0
2/18 12:40	93.4	↓-2.2
2/18 12:50	91.2	↓-2.2
2/18 13:00	88.9	↓-2.3
2/18 13:10	86.5	↓-2.4
2/18 13:20	84.1	↓-2.4
2/18 13:30	81.6	↓-2.5
2/18 13:40	79.0	↓-2.6
2/18 13:50	76.4	↓-2.6
2/18 14:00	73.7	↓-2.7
2/18 14:10	70.9	↓-2.8
2/18 14:20	68.2	↓-2.7
2/18 14:30	65.4	↓-2.8
2/18 14:40	62.6	↓-2.8
2/18 14:50	59.7	↓-2.9	最大潮位差
2/18 15:00	56.9	↓-2.8
2/18 15:10	54.1	↓-2.8
2/18 15:20	51.4	↓-2.7
2/18 15:30	48.7	↓-2.7
2/18 15:40	46.0	↓-2.7
2/18 15:50	43.4	↓-2.6
2/18 16:00	40.9	↓-2.5
2/18 16:10	38.5	↓-2.4
2/18 16:20	36.2	↓-2.3
2/18 16:30	34.0	↓-2.2
2/18 16:40	31.9	↓-2.1
2/18 16:50	30.0	↓-1.9
2/18 17:00	28.2	↓-1.8
2/18 17:10	26.6	↓-1.6
2/18 17:20	25.1	↓-1.5
2/18 17:30	23.8	↓-1.3
2/18 17:40	22.7	↓-1.1
2/18 17:50	21.7	↓-1.0
2/18 18:00	20.9	↓-0.8
2/18 18:10	20.2	↓-0.7
2/18 18:20	19.7	↓-0.5
2/18 18:30	19.4	↓-0.3
2/18 18:40	19.3	↓-0.1	干潮
2/18 18:50	19.3	0
2/18 19:00	19.5	↑0.2
2/18 19:10	19.8	↑0.3
2/18 19:20	20.3	↑0.5
2/18 19:30	21.0	↑0.7
2/18 19:40	21.9	↑0.9
2/18 19:50	22.9	↑1.0
2/18 20:00	24.1	↑1.2
2/18 20:10	25.4	↑1.3
2/18 20:20	26.9	↑1.5
2/18 20:30	28.5	↑1.6
2/18 20:40	30.3	↑1.8
2/18 20:50	32.2	↑1.9
2/18 21:00	34.2	↑2.0
2/18 21:10	36.3	↑2.1
2/18 21:20	38.5	↑2.2
2/18 21:30	40.9	↑2.4
2/18 21:40	43.2	↑2.3
2/18 21:50	45.7	↑2.5
2/18 22:00	48.2	↑2.5
2/18 22:10	50.7	↑2.5
2/18 22:20	53.2	↑2.5
2/18 22:30	55.8	↑2.6
2/18 22:40	58.3	↑2.5
2/18 22:50	60.9	↑2.6
2/18 23:00	63.4	↑2.5
2/18 23:10	65.8	↑2.4
2/18 23:20	68.2	↑2.4
2/18 23:30	70.6	↑2.4
2/18 23:40	72.9	↑2.3
2/18 23:50	75.1	↑2.2