7 (木)	04:22	10:30	16:32	22:39
	138cm	48cm	129cm	37cm
大潮 出 05:38 入 17:14 出 06:08 入 17:53

那珂湊（茨城）2021年10月7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
10/7 00:00	66.6	↑3.0
10/7 00:10	69.8	↑3.2
10/7 00:20	73.2	↑3.4
10/7 00:30	76.6	↑3.4
10/7 00:40	80.2	↑3.6
10/7 00:50	83.9	↑3.7
10/7 01:00	87.6	↑3.7
10/7 01:10	91.4	↑3.8
10/7 01:20	95.1	↑3.7
10/7 01:30	98.8	↑3.7
10/7 01:40	102.5	↑3.7
10/7 01:50	106.2	↑3.7
10/7 02:00	109.7	↑3.5
10/7 02:10	113.1	↑3.4
10/7 02:20	116.4	↑3.3
10/7 02:30	119.5	↑3.1
10/7 02:40	122.4	↑2.9
10/7 02:50	125.1	↑2.7
10/7 03:00	127.6	↑2.5
10/7 03:10	129.8	↑2.2
10/7 03:20	131.8	↑2.0
10/7 03:30	133.6	↑1.8
10/7 03:40	135.0	↑1.4
10/7 03:50	136.1	↑1.1
10/7 04:00	137.0	↑0.9
10/7 04:10	137.5	↑0.5
10/7 04:20	137.7	↑0.2	満潮
10/7 04:30	137.5	↓-0.2
10/7 04:40	137.1	↓-0.4
10/7 04:50	136.3	↓-0.8
10/7 05:00	135.2	↓-1.1
10/7 05:10	133.8	↓-1.4
10/7 05:20	132.1	↓-1.7
10/7 05:30	130.1	↓-2.0
10/7 05:40	127.9	↓-2.2
10/7 05:50	125.4	↓-2.5
10/7 06:00	122.6	↓-2.8
10/7 06:10	119.6	↓-3.0
10/7 06:20	116.4	↓-3.2
10/7 06:30	113.0	↓-3.4
10/7 06:40	109.5	↓-3.5
10/7 06:50	105.8	↓-3.7
10/7 07:00	102.1	↓-3.7
10/7 07:10	98.3	↓-3.8
10/7 07:20	94.4	↓-3.9
10/7 07:30	90.5	↓-3.9
10/7 07:40	86.7	↓-3.8
10/7 07:50	82.8	↓-3.9
10/7 08:00	79.1	↓-3.7
10/7 08:10	75.4	↓-3.7
10/7 08:20	71.9	↓-3.5
10/7 08:30	68.6	↓-3.3
10/7 08:40	65.4	↓-3.2
10/7 08:50	62.4	↓-3.0
10/7 09:00	59.6	↓-2.8
10/7 09:10	57.1	↓-2.5
10/7 09:20	54.9	↓-2.2
10/7 09:30	52.9	↓-2.0
10/7 09:40	51.2	↓-1.7
10/7 09:50	49.8	↓-1.4
10/7 10:00	48.8	↓-1.0
10/7 10:10	48.0	↓-0.8
10/7 10:20	47.6	↓-0.4	干潮
10/7 10:30	47.4	↓-0.2	干潮
10/7 10:40	47.6	↑0.2
10/7 10:50	48.1	↑0.5
10/7 11:00	48.9	↑0.8
10/7 11:10	50.0	↑1.1
10/7 11:20	51.4	↑1.4
10/7 11:30	53.1	↑1.7
10/7 11:40	55.0	↑1.9
10/7 11:50	57.2	↑2.2
10/7 12:00	59.6	↑2.4
10/7 12:10	62.2	↑2.6
10/7 12:20	65.0	↑2.8
10/7 12:30	68.0	↑3.0
10/7 12:40	71.1	↑3.1
10/7 12:50	74.3	↑3.2
10/7 13:00	77.6	↑3.3
10/7 13:10	81.0	↑3.4
10/7 13:20	84.5	↑3.5
10/7 13:30	87.9	↑3.4
10/7 13:40	91.4	↑3.5
10/7 13:50	94.8	↑3.4
10/7 14:00	98.2	↑3.4
10/7 14:10	101.5	↑3.3
10/7 14:20	104.7	↑3.2
10/7 14:30	107.8	↑3.1
10/7 14:40	110.8	↑3.0
10/7 14:50	113.6	↑2.8
10/7 15:00	116.2	↑2.6
10/7 15:10	118.5	↑2.3
10/7 15:20	120.7	↑2.2
10/7 15:30	122.6	↑1.9
10/7 15:40	124.3	↑1.7
10/7 15:50	125.7	↑1.4
10/7 16:00	126.8	↑1.1
10/7 16:10	127.6	↑0.8
10/7 16:20	128.1	↑0.5
10/7 16:30	128.2	↑0.1	満潮
10/7 16:40	128.1	↓-0.1
10/7 16:50	127.7	↓-0.4
10/7 17:00	126.9	↓-0.8
10/7 17:10	125.8	↓-1.1
10/7 17:20	124.4	↓-1.4
10/7 17:30	122.7	↓-1.7
10/7 17:40	120.7	↓-2.0
10/7 17:50	118.5	↓-2.2
10/7 18:00	115.9	↓-2.6
10/7 18:10	113.2	↓-2.7
10/7 18:20	110.1	↓-3.1
10/7 18:30	106.9	↓-3.2
10/7 18:40	103.5	↓-3.4
10/7 18:50	99.9	↓-3.6
10/7 19:00	96.2	↓-3.7
10/7 19:10	92.4	↓-3.8
10/7 19:20	88.5	↓-3.9
10/7 19:30	84.6	↓-3.9
10/7 19:40	80.6	↓-4.0	最大潮位差
10/7 19:50	76.7	↓-3.9
10/7 20:00	72.7	↓-4.0	最大潮位差
10/7 20:10	68.9	↓-3.8
10/7 20:20	65.1	↓-3.8
10/7 20:30	61.5	↓-3.6
10/7 20:40	58.1	↓-3.4
10/7 20:50	54.8	↓-3.3
10/7 21:00	51.7	↓-3.1
10/7 21:10	48.8	↓-2.9
10/7 21:20	46.2	↓-2.6
10/7 21:30	43.9	↓-2.3
10/7 21:40	41.8	↓-2.1
10/7 21:50	40.1	↓-1.7
10/7 22:00	38.7	↓-1.4
10/7 22:10	37.5	↓-1.2
10/7 22:20	36.8	↓-0.7
10/7 22:30	36.3	↓-0.5	干潮
10/7 22:40	36.2	↓-0.1
10/7 22:50	36.4	↑0.2
10/7 23:00	37.0	↑0.6
10/7 23:10	37.9	↑0.9
10/7 23:20	39.1	↑1.2
10/7 23:30	40.7	↑1.6
10/7 23:40	42.5	↑1.8
10/7 23:50	44.6	↑2.1