1 (金)	13:48	05:20	22:28	18:52
	116cm	43cm	111cm	105cm
長潮 出 05:33 入 17:23 出 - 入 14:35

那珂湊（茨城）2021年10月1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
10/1 00:00	93.5	↓-2.0
10/1 00:10	91.5	↓-2.0
10/1 00:20	89.4	↓-2.1
10/1 00:30	87.3	↓-2.1
10/1 00:40	85.1	↓-2.2
10/1 00:50	82.9	↓-2.2
10/1 01:00	80.6	↓-2.3
10/1 01:10	78.4	↓-2.2
10/1 01:20	76.1	↓-2.3
10/1 01:30	73.8	↓-2.3
10/1 01:40	71.6	↓-2.2
10/1 01:50	69.4	↓-2.2
10/1 02:00	67.2	↓-2.2
10/1 02:10	65.1	↓-2.1
10/1 02:20	63.0	↓-2.1
10/1 02:30	61.0	↓-2.0
10/1 02:40	59.0	↓-2.0
10/1 02:50	57.2	↓-1.8
10/1 03:00	55.4	↓-1.8
10/1 03:10	53.7	↓-1.7
10/1 03:20	52.1	↓-1.6
10/1 03:30	50.6	↓-1.5
10/1 03:40	49.2	↓-1.4
10/1 03:50	47.9	↓-1.3
10/1 04:00	46.8	↓-1.1
10/1 04:10	45.8	↓-1.0
10/1 04:20	44.9	↓-0.9
10/1 04:30	44.1	↓-0.8
10/1 04:40	43.5	↓-0.6
10/1 04:50	43.0	↓-0.5
10/1 05:00	42.6	↓-0.4
10/1 05:10	42.4	↓-0.2	干潮
10/1 05:20	42.4	0	干潮
10/1 05:30	42.4	0
10/1 05:40	42.7	↑0.3
10/1 05:50	43.0	↑0.3
10/1 06:00	43.6	↑0.6
10/1 06:10	44.2	↑0.6
10/1 06:20	45.1	↑0.9
10/1 06:30	46.0	↑0.9
10/1 06:40	47.1	↑1.1
10/1 06:50	48.4	↑1.3
10/1 07:00	49.7	↑1.3
10/1 07:10	51.2	↑1.5
10/1 07:20	52.9	↑1.7
10/1 07:30	54.6	↑1.7
10/1 07:40	56.5	↑1.9
10/1 07:50	58.4	↑1.9
10/1 08:00	60.5	↑2.1
10/1 08:10	62.6	↑2.1
10/1 08:20	64.8	↑2.2
10/1 08:30	67.1	↑2.3
10/1 08:40	69.4	↑2.3
10/1 08:50	71.8	↑2.4
10/1 09:00	74.2	↑2.4
10/1 09:10	76.6	↑2.4
10/1 09:20	79.0	↑2.4
10/1 09:30	81.5	↑2.5	最大潮位差
10/1 09:40	83.9	↑2.4
10/1 09:50	86.2	↑2.3
10/1 10:00	88.6	↑2.4
10/1 10:10	90.8	↑2.2
10/1 10:20	93.0	↑2.2
10/1 10:30	95.2	↑2.2
10/1 10:40	97.3	↑2.1
10/1 10:50	99.2	↑1.9
10/1 11:00	101.1	↑1.9
10/1 11:10	102.9	↑1.8
10/1 11:20	104.5	↑1.6
10/1 11:30	106.1	↑1.6
10/1 11:40	107.5	↑1.4
10/1 11:50	108.9	↑1.4
10/1 12:00	110.1	↑1.2
10/1 12:10	111.2	↑1.1
10/1 12:20	112.1	↑0.9
10/1 12:30	113.0	↑0.9
10/1 12:40	113.7	↑0.7
10/1 12:50	114.3	↑0.6
10/1 13:00	114.8	↑0.5
10/1 13:10	115.2	↑0.4
10/1 13:20	115.5	↑0.3
10/1 13:30	115.7	↑0.2
10/1 13:40	115.8	↑0.1	満潮
10/1 13:50	115.8	0
10/1 14:00	115.8	0
10/1 14:10	115.6	↓-0.2
10/1 14:20	115.4	↓-0.2
10/1 14:30	115.1	↓-0.3
10/1 14:40	114.8	↓-0.3
10/1 14:50	114.4	↓-0.4
10/1 15:00	114.0	↓-0.4
10/1 15:10	113.5	↓-0.5
10/1 15:20	113.0	↓-0.5
10/1 15:30	112.5	↓-0.5
10/1 15:40	111.9	↓-0.6
10/1 15:50	111.4	↓-0.5
10/1 16:00	110.8	↓-0.6
10/1 16:10	110.2	↓-0.6
10/1 16:20	109.6	↓-0.6
10/1 16:30	109.0	↓-0.6
10/1 16:40	108.5	↓-0.5
10/1 16:50	107.9	↓-0.6
10/1 17:00	107.4	↓-0.5
10/1 17:10	106.9	↓-0.5
10/1 17:20	106.4	↓-0.5
10/1 17:30	106.0	↓-0.4
10/1 17:40	105.6	↓-0.4
10/1 17:50	105.2	↓-0.4
10/1 18:00	104.9	↓-0.3
10/1 18:10	104.7	↓-0.2
10/1 18:20	104.5	↓-0.2
10/1 18:30	104.3	↓-0.2
10/1 18:40	104.2	↓-0.1
10/1 18:50	104.2	0	干潮
10/1 19:00	104.2	0
10/1 19:10	104.3	↑0.1
10/1 19:20	104.5	↑0.2
10/1 19:30	104.6	↑0.1
10/1 19:40	104.9	↑0.3
10/1 19:50	105.2	↑0.3
10/1 20:00	105.5	↑0.3
10/1 20:10	105.9	↑0.4
10/1 20:20	106.2	↑0.3
10/1 20:30	106.7	↑0.5
10/1 20:40	107.1	↑0.4
10/1 20:50	107.5	↑0.4
10/1 21:00	108.0	↑0.5
10/1 21:10	108.4	↑0.4
10/1 21:20	108.8	↑0.4
10/1 21:30	109.2	↑0.4
10/1 21:40	109.5	↑0.3
10/1 21:50	109.8	↑0.3
10/1 22:00	110.0	↑0.2
10/1 22:10	110.2	↑0.2
10/1 22:20	110.3	↑0.1	満潮
10/1 22:30	110.3	0
10/1 22:40	110.2	↓-0.1
10/1 22:50	110.1	↓-0.1
10/1 23:00	109.8	↓-0.3
10/1 23:10	109.4	↓-0.4
10/1 23:20	108.9	↓-0.5
10/1 23:30	108.3	↓-0.6
10/1 23:40	107.6	↓-0.7
10/1 23:50	106.7	↓-0.9