20 (金)	14:06	06:41	23:52	18:20
	109cm	36cm	128cm	96cm
中潮 出 04:36 入 18:54 出 15:02 入 00:22

那珂湊（茨城）2040年07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
7/20 00:00	120.4	↓-1.1
7/20 00:10	119.2	↓-1.2
7/20 00:20	117.7	↓-1.5
7/20 00:30	116.1	↓-1.6
7/20 00:40	114.3	↓-1.8
7/20 00:50	112.4	↓-1.9
7/20 01:00	110.2	↓-2.2
7/20 01:10	108.0	↓-2.2
7/20 01:20	105.6	↓-2.4
7/20 01:30	103.1	↓-2.5
7/20 01:40	100.5	↓-2.6
7/20 01:50	97.7	↓-2.8
7/20 02:00	94.9	↓-2.8
7/20 02:10	92.0	↓-2.9
7/20 02:20	89.1	↓-2.9
7/20 02:30	86.1	↓-3.0
7/20 02:40	83.0	↓-3.1	最大潮位差
7/20 02:50	80.0	↓-3.0
7/20 03:00	76.9	↓-3.1	最大潮位差
7/20 03:10	73.9	↓-3.0
7/20 03:20	70.9	↓-3.0
7/20 03:30	67.9	↓-3.0
7/20 03:40	65.0	↓-2.9
7/20 03:50	62.2	↓-2.8
7/20 04:00	59.4	↓-2.8
7/20 04:10	56.8	↓-2.6
7/20 04:20	54.2	↓-2.6
7/20 04:30	51.8	↓-2.4
7/20 04:40	49.5	↓-2.3
7/20 04:50	47.3	↓-2.2
7/20 05:00	45.3	↓-2.0
7/20 05:10	43.4	↓-1.9
7/20 05:20	41.8	↓-1.6
7/20 05:30	40.3	↓-1.5
7/20 05:40	38.9	↓-1.4
7/20 05:50	37.8	↓-1.1
7/20 06:00	36.9	↓-0.9
7/20 06:10	36.2	↓-0.7
7/20 06:20	35.7	↓-0.5
7/20 06:30	35.3	↓-0.4
7/20 06:40	35.2	↓-0.1	干潮
7/20 06:50	35.3	↑0.1
7/20 07:00	35.7	↑0.4
7/20 07:10	36.2	↑0.5
7/20 07:20	36.9	↑0.7
7/20 07:30	37.8	↑0.9
7/20 07:40	39.0	↑1.2
7/20 07:50	40.3	↑1.3
7/20 08:00	41.8	↑1.5
7/20 08:10	43.4	↑1.6
7/20 08:20	45.2	↑1.8
7/20 08:30	47.2	↑2.0
7/20 08:40	49.3	↑2.1
7/20 08:50	51.5	↑2.2
7/20 09:00	53.9	↑2.4
7/20 09:10	56.3	↑2.4
7/20 09:20	58.8	↑2.5
7/20 09:30	61.4	↑2.6
7/20 09:40	64.0	↑2.6
7/20 09:50	66.7	↑2.7
7/20 10:00	69.4	↑2.7
7/20 10:10	72.1	↑2.7
7/20 10:20	74.8	↑2.7
7/20 10:30	77.4	↑2.6
7/20 10:40	80.0	↑2.6
7/20 10:50	82.6	↑2.6
7/20 11:00	85.1	↑2.5
7/20 11:10	87.5	↑2.4
7/20 11:20	89.8	↑2.3
7/20 11:30	92.0	↑2.2
7/20 11:40	94.1	↑2.1
7/20 11:50	96.1	↑2.0
7/20 12:00	97.9	↑1.8
7/20 12:10	99.6	↑1.7
7/20 12:20	101.2	↑1.6
7/20 12:30	102.6	↑1.4
7/20 12:40	103.9	↑1.3
7/20 12:50	105.0	↑1.1
7/20 13:00	105.9	↑0.9
7/20 13:10	106.8	↑0.9
7/20 13:20	107.4	↑0.6
7/20 13:30	108.0	↑0.6
7/20 13:40	108.3	↑0.3
7/20 13:50	108.6	↑0.3
7/20 14:00	108.7	↑0.1	満潮
7/20 14:10	108.7	0
7/20 14:20	108.6	↓-0.1
7/20 14:30	108.4	↓-0.2
7/20 14:40	108.0	↓-0.4
7/20 14:50	107.6	↓-0.4
7/20 15:00	107.1	↓-0.5
7/20 15:10	106.5	↓-0.6
7/20 15:20	105.9	↓-0.6
7/20 15:30	105.2	↓-0.7
7/20 15:40	104.5	↓-0.7
7/20 15:50	103.8	↓-0.7
7/20 16:00	103.0	↓-0.8
7/20 16:10	102.2	↓-0.8
7/20 16:20	101.4	↓-0.8
7/20 16:30	100.7	↓-0.7
7/20 16:40	99.9	↓-0.8
7/20 16:50	99.2	↓-0.7
7/20 17:00	98.5	↓-0.7
7/20 17:10	97.9	↓-0.6
7/20 17:20	97.4	↓-0.5
7/20 17:30	96.9	↓-0.5
7/20 17:40	96.5	↓-0.4
7/20 17:50	96.1	↓-0.4
7/20 18:00	95.9	↓-0.2
7/20 18:10	95.8	↓-0.1	干潮
7/20 18:20	95.7	↓-0.1	干潮
7/20 18:30	95.8	↑0.1
7/20 18:40	96.0	↑0.2
7/20 18:50	96.3	↑0.3
7/20 19:00	96.7	↑0.4
7/20 19:10	97.2	↑0.5
7/20 19:20	97.8	↑0.6
7/20 19:30	98.5	↑0.7
7/20 19:40	99.4	↑0.9
7/20 19:50	100.3	↑0.9
7/20 20:00	101.3	↑1.0
7/20 20:10	102.5	↑1.2
7/20 20:20	103.7	↑1.2
7/20 20:30	105.0	↑1.3
7/20 20:40	106.3	↑1.3
7/20 20:50	107.7	↑1.4
7/20 21:00	109.2	↑1.5
7/20 21:10	110.6	↑1.4
7/20 21:20	112.1	↑1.5
7/20 21:30	113.6	↑1.5
7/20 21:40	115.1	↑1.5
7/20 21:50	116.5	↑1.4
7/20 22:00	118.0	↑1.5
7/20 22:10	119.3	↑1.3
7/20 22:20	120.6	↑1.3
7/20 22:30	121.8	↑1.2
7/20 22:40	123.0	↑1.2
7/20 22:50	124.0	↑1.0
7/20 23:00	124.9	↑0.9
7/20 23:10	125.6	↑0.7
7/20 23:20	126.2	↑0.6
7/20 23:30	126.7	↑0.5
7/20 23:40	126.9	↑0.2
7/20 23:50	127.0	↑0.1	満潮