20 (日)	03:19	07:53	12:49	20:30
	104cm	84cm	111cm	0cm
中潮 出 06:21 入 17:24 出 04:21 入 14:11

那珂湊（茨城）2039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	70.6	↑3.2
2/20 00:10	73.6	↑3.0
2/20 00:20	76.6	↑3.0
2/20 00:30	79.5	↑2.9
2/20 00:40	82.2	↑2.7
2/20 00:50	84.8	↑2.6
2/20 01:00	87.3	↑2.5
2/20 01:10	89.6	↑2.3
2/20 01:20	91.7	↑2.1
2/20 01:30	93.7	↑2.0
2/20 01:40	95.5	↑1.8
2/20 01:50	97.1	↑1.6
2/20 02:00	98.5	↑1.4
2/20 02:10	99.8	↑1.3
2/20 02:20	100.9	↑1.1
2/20 02:30	101.8	↑0.9
2/20 02:40	102.5	↑0.7
2/20 02:50	103.0	↑0.5
2/20 03:00	103.4	↑0.4
2/20 03:10	103.6	↑0.2	満潮
2/20 03:20	103.6	0
2/20 03:30	103.5	↓-0.1
2/20 03:40	103.3	↓-0.2
2/20 03:50	102.9	↓-0.4
2/20 04:00	102.4	↓-0.5
2/20 04:10	101.7	↓-0.7
2/20 04:20	101.0	↓-0.7
2/20 04:30	100.2	↓-0.8
2/20 04:40	99.3	↓-0.9
2/20 04:50	98.3	↓-1.0
2/20 05:00	97.3	↓-1.0
2/20 05:10	96.2	↓-1.1
2/20 05:20	95.1	↓-1.1
2/20 05:30	94.0	↓-1.1
2/20 05:40	92.9	↓-1.1
2/20 05:50	91.8	↓-1.1
2/20 06:00	90.8	↓-1.0
2/20 06:10	89.7	↓-1.1
2/20 06:20	88.8	↓-0.9
2/20 06:30	87.8	↓-1.0
2/20 06:40	87.0	↓-0.8
2/20 06:50	86.2	↓-0.8
2/20 07:00	85.6	↓-0.6
2/20 07:10	85.0	↓-0.6
2/20 07:20	84.5	↓-0.5
2/20 07:30	84.2	↓-0.3
2/20 07:40	84.0	↓-0.2
2/20 07:50	83.9	↓-0.1	干潮
2/20 08:00	83.9	0
2/20 08:10	84.1	↑0.2
2/20 08:20	84.4	↑0.3
2/20 08:30	84.8	↑0.4
2/20 08:40	85.4	↑0.6
2/20 08:50	86.0	↑0.6
2/20 09:00	86.8	↑0.8
2/20 09:10	87.7	↑0.9
2/20 09:20	88.7	↑1.0
2/20 09:30	89.8	↑1.1
2/20 09:40	91.0	↑1.2
2/20 09:50	92.2	↑1.2
2/20 10:00	93.5	↑1.3
2/20 10:10	94.9	↑1.4
2/20 10:20	96.2	↑1.3
2/20 10:30	97.6	↑1.4
2/20 10:40	99.0	↑1.4
2/20 10:50	100.4	↑1.4
2/20 11:00	101.7	↑1.3
2/20 11:10	103.0	↑1.3
2/20 11:20	104.2	↑1.2
2/20 11:30	105.4	↑1.2
2/20 11:40	106.4	↑1.0
2/20 11:50	107.4	↑1.0
2/20 12:00	108.2	↑0.8
2/20 12:10	108.9	↑0.7
2/20 12:20	109.5	↑0.6
2/20 12:30	109.9	↑0.4
2/20 12:40	110.1	↑0.2	満潮
2/20 12:50	110.1	0
2/20 13:00	110.0	↓-0.1
2/20 13:10	109.7	↓-0.3
2/20 13:20	109.1	↓-0.6
2/20 13:30	108.4	↓-0.7
2/20 13:40	107.4	↓-1.0
2/20 13:50	106.3	↓-1.1
2/20 14:00	104.9	↓-1.4
2/20 14:10	103.3	↓-1.6
2/20 14:20	101.5	↓-1.8
2/20 14:30	99.5	↓-2.0
2/20 14:40	97.3	↓-2.2
2/20 14:50	94.9	↓-2.4
2/20 15:00	92.3	↓-2.6
2/20 15:10	89.6	↓-2.7
2/20 15:20	86.6	↓-3.0
2/20 15:30	83.5	↓-3.1
2/20 15:40	80.3	↓-3.2
2/20 15:50	76.9	↓-3.4
2/20 16:00	73.4	↓-3.5
2/20 16:10	69.8	↓-3.6
2/20 16:20	66.1	↓-3.7
2/20 16:30	62.4	↓-3.7
2/20 16:40	58.6	↓-3.8
2/20 16:50	54.7	↓-3.9	最大潮位差
2/20 17:00	50.8	↓-3.9	最大潮位差
2/20 17:10	47.0	↓-3.8
2/20 17:20	43.1	↓-3.9	最大潮位差
2/20 17:30	39.3	↓-3.8
2/20 17:40	35.6	↓-3.7
2/20 17:50	32.0	↓-3.6
2/20 18:00	28.4	↓-3.6
2/20 18:10	25.0	↓-3.4
2/20 18:20	21.7	↓-3.3
2/20 18:30	18.6	↓-3.1
2/20 18:40	15.6	↓-3.0
2/20 18:50	12.9	↓-2.7
2/20 19:00	10.4	↓-2.5
2/20 19:10	8.1	↓-2.3
2/20 19:20	6.0	↓-2.1
2/20 19:30	4.2	↓-1.8
2/20 19:40	2.6	↓-1.6
2/20 19:50	1.4	↓-1.2
2/20 20:00	0.4	↓-1.0
2/20 20:10	-0.3	↓-0.7
2/20 20:20	-0.7	↓-0.4	干潮
2/20 20:30	-0.8	↓-0.1	干潮
2/20 20:40	-0.6	↑0.2
2/20 20:50	-0.2	↑0.4
2/20 21:00	0.6	↑0.8
2/20 21:10	1.7	↑1.1
2/20 21:20	3.0	↑1.3
2/20 21:30	4.6	↑1.6
2/20 21:40	6.5	↑1.9
2/20 21:50	8.7	↑2.2
2/20 22:00	11.1	↑2.4
2/20 22:10	13.7	↑2.6
2/20 22:20	16.5	↑2.8
2/20 22:30	19.5	↑3.0
2/20 22:40	22.7	↑3.2
2/20 22:50	26.1	↑3.4
2/20 23:00	29.6	↑3.5
2/20 23:10	33.2	↑3.6
2/20 23:20	36.9	↑3.7
2/20 23:30	40.7	↑3.8
2/20 23:40	44.6	↑3.9	最大潮位差
2/20 23:50	48.5	↑3.9	最大潮位差