20 (火)	07:14	00:51	20:52	14:10
	110cm	57cm	84cm	32cm
小潮 出 06:20 入 17:25 出 09:16 入 23:52

那珂湊（茨城）2029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	58.3	↓-0.9
2/20 00:10	57.5	↓-0.8
2/20 00:20	56.9	↓-0.6
2/20 00:30	56.5	↓-0.4
2/20 00:40	56.2	↓-0.3
2/20 00:50	56.2	0	干潮
2/20 01:00	56.3	↑0.1
2/20 01:10	56.5	↑0.2
2/20 01:20	57.0	↑0.5
2/20 01:30	57.6	↑0.6
2/20 01:40	58.4	↑0.8
2/20 01:50	59.4	↑1.0
2/20 02:00	60.5	↑1.1
2/20 02:10	61.8	↑1.3
2/20 02:20	63.2	↑1.4
2/20 02:30	64.7	↑1.5
2/20 02:40	66.4	↑1.7
2/20 02:50	68.2	↑1.8
2/20 03:00	70.0	↑1.8
2/20 03:10	72.0	↑2.0
2/20 03:20	74.0	↑2.0
2/20 03:30	76.0	↑2.0
2/20 03:40	78.1	↑2.1
2/20 03:50	80.3	↑2.2
2/20 04:00	82.4	↑2.1
2/20 04:10	84.6	↑2.2
2/20 04:20	86.7	↑2.1
2/20 04:30	88.8	↑2.1
2/20 04:40	90.9	↑2.1
2/20 04:50	92.9	↑2.0
2/20 05:00	94.9	↑2.0
2/20 05:10	96.8	↑1.9
2/20 05:20	98.6	↑1.8
2/20 05:30	100.3	↑1.7
2/20 05:40	101.9	↑1.6
2/20 05:50	103.4	↑1.5
2/20 06:00	104.7	↑1.3
2/20 06:10	105.9	↑1.2
2/20 06:20	107.0	↑1.1
2/20 06:30	107.9	↑0.9
2/20 06:40	108.6	↑0.7
2/20 06:50	109.1	↑0.5
2/20 07:00	109.4	↑0.3
2/20 07:10	109.6	↑0.2	満潮
2/20 07:20	109.6	0
2/20 07:30	109.3	↓-0.3
2/20 07:40	108.8	↓-0.5
2/20 07:50	108.2	↓-0.6
2/20 08:00	107.3	↓-0.9
2/20 08:10	106.2	↓-1.1
2/20 08:20	104.9	↓-1.3
2/20 08:30	103.4	↓-1.5
2/20 08:40	101.7	↓-1.7
2/20 08:50	99.9	↓-1.8
2/20 09:00	97.8	↓-2.1
2/20 09:10	95.6	↓-2.2
2/20 09:20	93.2	↓-2.4
2/20 09:30	90.7	↓-2.5
2/20 09:40	88.0	↓-2.7
2/20 09:50	85.3	↓-2.7
2/20 10:00	82.4	↓-2.9
2/20 10:10	79.4	↓-3.0
2/20 10:20	76.4	↓-3.0
2/20 10:30	73.4	↓-3.0
2/20 10:40	70.4	↓-3.0
2/20 10:50	67.3	↓-3.1	最大潮位差
2/20 11:00	64.3	↓-3.0
2/20 11:10	61.3	↓-3.0
2/20 11:20	58.3	↓-3.0
2/20 11:30	55.5	↓-2.8
2/20 11:40	52.7	↓-2.8
2/20 11:50	50.1	↓-2.6
2/20 12:00	47.6	↓-2.5
2/20 12:10	45.2	↓-2.4
2/20 12:20	43.0	↓-2.2
2/20 12:30	40.9	↓-2.1
2/20 12:40	39.1	↓-1.8
2/20 12:50	37.4	↓-1.7
2/20 13:00	35.9	↓-1.5
2/20 13:10	34.6	↓-1.3
2/20 13:20	33.5	↓-1.1
2/20 13:30	32.7	↓-0.8
2/20 13:40	32.0	↓-0.7
2/20 13:50	31.5	↓-0.5
2/20 14:00	31.2	↓-0.3	干潮
2/20 14:10	31.2	0	干潮
2/20 14:20	31.3	↑0.1
2/20 14:30	31.6	↑0.3
2/20 14:40	32.1	↑0.5
2/20 14:50	32.7	↑0.6
2/20 15:00	33.5	↑0.8
2/20 15:10	34.5	↑1.0
2/20 15:20	35.6	↑1.1
2/20 15:30	36.9	↑1.3
2/20 15:40	38.2	↑1.3
2/20 15:50	39.7	↑1.5
2/20 16:00	41.3	↑1.6
2/20 16:10	43.0	↑1.7
2/20 16:20	44.7	↑1.7
2/20 16:30	46.6	↑1.9
2/20 16:40	48.5	↑1.9
2/20 16:50	50.4	↑1.9
2/20 17:00	52.4	↑2.0
2/20 17:10	54.4	↑2.0
2/20 17:20	56.4	↑2.0
2/20 17:30	58.4	↑2.0
2/20 17:40	60.4	↑2.0
2/20 17:50	62.4	↑2.0
2/20 18:00	64.3	↑1.9
2/20 18:10	66.2	↑1.9
2/20 18:20	68.1	↑1.9
2/20 18:30	69.9	↑1.8
2/20 18:40	71.6	↑1.7
2/20 18:50	73.2	↑1.6
2/20 19:00	74.8	↑1.6
2/20 19:10	76.2	↑1.4
2/20 19:20	77.5	↑1.3
2/20 19:30	78.7	↑1.2
2/20 19:40	79.8	↑1.1
2/20 19:50	80.8	↑1.0
2/20 20:00	81.6	↑0.8
2/20 20:10	82.2	↑0.6
2/20 20:20	82.8	↑0.6
2/20 20:30	83.1	↑0.3
2/20 20:40	83.4	↑0.3
2/20 20:50	83.5	↑0.1	満潮
2/20 21:00	83.4	↓-0.1
2/20 21:10	83.2	↓-0.2
2/20 21:20	82.9	↓-0.3
2/20 21:30	82.4	↓-0.5
2/20 21:40	81.9	↓-0.5
2/20 21:50	81.2	↓-0.7
2/20 22:00	80.4	↓-0.8
2/20 22:10	79.6	↓-0.8
2/20 22:20	78.6	↓-1.0
2/20 22:30	77.6	↓-1.0
2/20 22:40	76.6	↓-1.0
2/20 22:50	75.5	↓-1.1
2/20 23:00	74.4	↓-1.1
2/20 23:10	73.4	↓-1.0
2/20 23:20	72.3	↓-1.1
2/20 23:30	71.2	↓-1.1
2/20 23:40	70.2	↓-1.0
2/20 23:50	69.3	↓-0.9