20 (土)	08:45	02:04	23:28	16:19
	105cm	65cm	80cm	36cm
小潮 出 06:20 入 17:25 出 10:49 入 00:26

那珂湊（茨城）2021年02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
2/20 00:00	71.8	↓-0.9
2/20 00:10	70.9	↓-0.9
2/20 00:20	70.0	↓-0.9
2/20 00:30	69.2	↓-0.8
2/20 00:40	68.4	↓-0.8
2/20 00:50	67.6	↓-0.8
2/20 01:00	67.0	↓-0.6
2/20 01:10	66.4	↓-0.6
2/20 01:20	65.9	↓-0.5
2/20 01:30	65.5	↓-0.4
2/20 01:40	65.2	↓-0.3
2/20 01:50	65.0	↓-0.2
2/20 02:00	64.9	↓-0.1	干潮
2/20 02:10	64.9	0
2/20 02:20	65.1	↑0.2
2/20 02:30	65.3	↑0.2
2/20 02:40	65.6	↑0.3
2/20 02:50	66.1	↑0.5
2/20 03:00	66.7	↑0.6
2/20 03:10	67.3	↑0.6
2/20 03:20	68.1	↑0.8
2/20 03:30	68.9	↑0.8
2/20 03:40	69.9	↑1.0
2/20 03:50	70.9	↑1.0
2/20 04:00	72.0	↑1.1
2/20 04:10	73.2	↑1.2
2/20 04:20	74.5	↑1.3
2/20 04:30	75.8	↑1.3
2/20 04:40	77.1	↑1.3
2/20 04:50	78.5	↑1.4
2/20 05:00	80.0	↑1.5
2/20 05:10	81.4	↑1.4
2/20 05:20	82.9	↑1.5
2/20 05:30	84.5	↑1.6
2/20 05:40	86.0	↑1.5
2/20 05:50	87.5	↑1.5
2/20 06:00	89.0	↑1.5
2/20 06:10	90.5	↑1.5
2/20 06:20	92.0	↑1.5
2/20 06:30	93.4	↑1.4
2/20 06:40	94.8	↑1.4
2/20 06:50	96.1	↑1.3
2/20 07:00	97.4	↑1.3
2/20 07:10	98.6	↑1.2
2/20 07:20	99.7	↑1.1
2/20 07:30	100.7	↑1.0
2/20 07:40	101.6	↑0.9
2/20 07:50	102.4	↑0.8
2/20 08:00	103.1	↑0.7
2/20 08:10	103.7	↑0.6
2/20 08:20	104.1	↑0.4
2/20 08:30	104.4	↑0.3
2/20 08:40	104.5	↑0.1	満潮
2/20 08:50	104.5	0
2/20 09:00	104.4	↓-0.1
2/20 09:10	104.0	↓-0.4
2/20 09:20	103.5	↓-0.5
2/20 09:30	102.8	↓-0.7
2/20 09:40	102.0	↓-0.8
2/20 09:50	101.0	↓-1.0
2/20 10:00	99.9	↓-1.1
2/20 10:10	98.5	↓-1.4
2/20 10:20	97.1	↓-1.4
2/20 10:30	95.4	↓-1.7
2/20 10:40	93.7	↓-1.7
2/20 10:50	91.8	↓-1.9
2/20 11:00	89.8	↓-2.0
2/20 11:10	87.7	↓-2.1
2/20 11:20	85.5	↓-2.2
2/20 11:30	83.2	↓-2.3
2/20 11:40	80.8	↓-2.4
2/20 11:50	78.4	↓-2.4
2/20 12:00	75.9	↓-2.5	最大潮位差
2/20 12:10	73.5	↓-2.4
2/20 12:20	71.0	↓-2.5	最大潮位差
2/20 12:30	68.5	↓-2.5	最大潮位差
2/20 12:40	66.0	↓-2.5	最大潮位差
2/20 12:50	63.5	↓-2.5	最大潮位差
2/20 13:00	61.1	↓-2.4
2/20 13:10	58.8	↓-2.3
2/20 13:20	56.5	↓-2.3
2/20 13:30	54.3	↓-2.2
2/20 13:40	52.1	↓-2.2
2/20 13:50	50.1	↓-2.0
2/20 14:00	48.2	↓-1.9
2/20 14:10	46.4	↓-1.8
2/20 14:20	44.7	↓-1.7
2/20 14:30	43.2	↓-1.5
2/20 14:40	41.7	↓-1.5
2/20 14:50	40.4	↓-1.3
2/20 15:00	39.3	↓-1.1
2/20 15:10	38.3	↓-1.0
2/20 15:20	37.4	↓-0.9
2/20 15:30	36.7	↓-0.7
2/20 15:40	36.1	↓-0.6
2/20 15:50	35.6	↓-0.5
2/20 16:00	35.3	↓-0.3
2/20 16:10	35.1	↓-0.2	干潮
2/20 16:20	35.1	0
2/20 16:30	35.2	↑0.1
2/20 16:40	35.4	↑0.2
2/20 16:50	35.8	↑0.4
2/20 17:00	36.3	↑0.5
2/20 17:10	36.9	↑0.6
2/20 17:20	37.6	↑0.7
2/20 17:30	38.4	↑0.8
2/20 17:40	39.4	↑1.0
2/20 17:50	40.4	↑1.0
2/20 18:00	41.6	↑1.2
2/20 18:10	42.8	↑1.2
2/20 18:20	44.1	↑1.3
2/20 18:30	45.5	↑1.4
2/20 18:40	46.9	↑1.4
2/20 18:50	48.4	↑1.5
2/20 19:00	50.0	↑1.6
2/20 19:10	51.6	↑1.6
2/20 19:20	53.2	↑1.6
2/20 19:30	54.9	↑1.7
2/20 19:40	56.6	↑1.7
2/20 19:50	58.2	↑1.6
2/20 20:00	59.9	↑1.7
2/20 20:10	61.6	↑1.7
2/20 20:20	63.2	↑1.6
2/20 20:30	64.8	↑1.6
2/20 20:40	66.3	↑1.5
2/20 20:50	67.8	↑1.5
2/20 21:00	69.3	↑1.5
2/20 21:10	70.6	↑1.3
2/20 21:20	71.9	↑1.3
2/20 21:30	73.1	↑1.2
2/20 21:40	74.2	↑1.1
2/20 21:50	75.2	↑1.0
2/20 22:00	76.1	↑0.9
2/20 22:10	76.9	↑0.8
2/20 22:20	77.6	↑0.7
2/20 22:30	78.1	↑0.5
2/20 22:40	78.6	↑0.5
2/20 22:50	79.0	↑0.4
2/20 23:00	79.3	↑0.3
2/20 23:10	79.5	↑0.2
2/20 23:20	79.6	↑0.1	満潮
2/20 23:30	79.6	0
2/20 23:40	79.5	↓-0.1
2/20 23:50	79.4	↓-0.1