20 (金)	11:25	03:01	19:23	12:38
	108cm	58cm	126cm	108cm
小潮 出 05:24 入 17:39 出 23:01 入 12:52

日立（茨城）2030年09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
9/20 00:00	79.0	↓-2.2	最大潮位差
9/20 00:10	76.8	↓-2.2	最大潮位差
9/20 00:20	74.7	↓-2.1
9/20 00:30	72.8	↓-1.9
9/20 00:40	70.9	↓-1.9
9/20 00:50	69.1	↓-1.8
9/20 01:00	67.4	↓-1.7
9/20 01:10	65.8	↓-1.6
9/20 01:20	64.4	↓-1.4
9/20 01:30	63.0	↓-1.4
9/20 01:40	61.8	↓-1.2
9/20 01:50	60.7	↓-1.1
9/20 02:00	59.8	↓-0.9
9/20 02:10	59.0	↓-0.8
9/20 02:20	58.3	↓-0.7
9/20 02:30	57.8	↓-0.5
9/20 02:40	57.4	↓-0.4
9/20 02:50	57.2	↓-0.2
9/20 03:00	57.1	↓-0.1	干潮
9/20 03:10	57.2	↑0.1
9/20 03:20	57.4	↑0.2
9/20 03:30	57.8	↑0.4
9/20 03:40	58.3	↑0.5
9/20 03:50	59.0	↑0.7
9/20 04:00	59.8	↑0.8
9/20 04:10	60.8	↑1.0
9/20 04:20	61.8	↑1.0
9/20 04:30	63.0	↑1.2
9/20 04:40	64.3	↑1.3
9/20 04:50	65.6	↑1.3
9/20 05:00	67.1	↑1.5
9/20 05:10	68.6	↑1.5
9/20 05:20	70.2	↑1.6
9/20 05:30	71.8	↑1.6
9/20 05:40	73.5	↑1.7
9/20 05:50	75.2	↑1.7
9/20 06:00	76.9	↑1.7
9/20 06:10	78.6	↑1.7
9/20 06:20	80.4	↑1.8
9/20 06:30	82.1	↑1.7
9/20 06:40	83.8	↑1.7
9/20 06:50	85.5	↑1.7
9/20 07:00	87.1	↑1.6
9/20 07:10	88.7	↑1.6
9/20 07:20	90.3	↑1.6
9/20 07:30	91.9	↑1.6
9/20 07:40	93.3	↑1.4
9/20 07:50	94.8	↑1.5
9/20 08:00	96.1	↑1.3
9/20 08:10	97.4	↑1.3
9/20 08:20	98.6	↑1.2
9/20 08:30	99.8	↑1.2
9/20 08:40	100.8	↑1.0
9/20 08:50	101.8	↑1.0
9/20 09:00	102.7	↑0.9
9/20 09:10	103.5	↑0.8
9/20 09:20	104.3	↑0.8
9/20 09:30	104.9	↑0.6
9/20 09:40	105.5	↑0.6
9/20 09:50	106.0	↑0.5
9/20 10:00	106.4	↑0.4
9/20 10:10	106.7	↑0.3
9/20 10:20	107.0	↑0.3
9/20 10:30	107.2	↑0.2
9/20 10:40	107.4	↑0.2
9/20 10:50	107.5	↑0.1
9/20 11:00	107.6	↑0.1
9/20 11:10	107.6	0
9/20 11:20	107.7	↑0.1	満潮
9/20 11:30	107.7	0
9/20 11:40	107.6	↓-0.1
9/20 11:50	107.6	0
9/20 12:00	107.6	0
9/20 12:10	107.6	0
9/20 12:20	107.5	↓-0.1
9/20 12:30	107.5	0	干潮
9/20 12:40	107.5	0
9/20 12:50	107.5	0
9/20 13:00	107.6	↑0.1
9/20 13:10	107.6	0
9/20 13:20	107.7	↑0.1
9/20 13:30	107.8	↑0.1
9/20 13:40	107.9	↑0.1
9/20 13:50	108.1	↑0.2
9/20 14:00	108.3	↑0.2
9/20 14:10	108.5	↑0.2
9/20 14:20	108.8	↑0.3
9/20 14:30	109.1	↑0.3
9/20 14:40	109.4	↑0.3
9/20 14:50	109.8	↑0.4
9/20 15:00	110.2	↑0.4
9/20 15:10	110.7	↑0.5
9/20 15:20	111.3	↑0.6
9/20 15:30	111.9	↑0.6
9/20 15:40	112.5	↑0.6
9/20 15:50	113.2	↑0.7
9/20 16:00	113.9	↑0.7
9/20 16:10	114.6	↑0.7
9/20 16:20	115.4	↑0.8
9/20 16:30	116.2	↑0.8
9/20 16:40	117.0	↑0.8
9/20 16:50	117.8	↑0.8
9/20 17:00	118.6	↑0.8
9/20 17:10	119.4	↑0.8
9/20 17:20	120.2	↑0.8
9/20 17:30	120.9	↑0.7
9/20 17:40	121.6	↑0.7
9/20 17:50	122.3	↑0.7
9/20 18:00	122.9	↑0.6
9/20 18:10	123.5	↑0.6
9/20 18:20	124.0	↑0.5
9/20 18:30	124.5	↑0.5
9/20 18:40	124.8	↑0.3
9/20 18:50	125.1	↑0.3
9/20 19:00	125.4	↑0.3
9/20 19:10	125.5	↑0.1
9/20 19:20	125.6	↑0.1	満潮
9/20 19:30	125.5	↓-0.1
9/20 19:40	125.4	↓-0.1
9/20 19:50	125.2	↓-0.2
9/20 20:00	124.9	↓-0.3
9/20 20:10	124.6	↓-0.3
9/20 20:20	124.1	↓-0.5
9/20 20:30	123.5	↓-0.6
9/20 20:40	122.9	↓-0.6
9/20 20:50	122.1	↓-0.8
9/20 21:00	121.3	↓-0.8
9/20 21:10	120.4	↓-0.9
9/20 21:20	119.3	↓-1.1
9/20 21:30	118.2	↓-1.1
9/20 21:40	117.0	↓-1.2
9/20 21:50	115.7	↓-1.3
9/20 22:00	114.3	↓-1.4
9/20 22:10	112.9	↓-1.4
9/20 22:20	111.4	↓-1.5
9/20 22:30	109.8	↓-1.6
9/20 22:40	108.2	↓-1.6
9/20 22:50	106.5	↓-1.7
9/20 23:00	104.8	↓-1.7
9/20 23:10	103.0	↓-1.8
9/20 23:20	101.2	↓-1.8
9/20 23:30	99.4	↓-1.8
9/20 23:40	97.5	↓-1.9
9/20 23:50	95.7	↓-1.8