20 (火)	04:27	09:31	15:03	22:04
	112cm	68cm	122cm	-4cm
大潮 出 06:20 入 17:25 出 16:36 入 05:37

那珂湊（茨城）2046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	32.7	↑4.0
2/20 00:10	36.9	↑4.2
2/20 00:20	41.1	↑4.2
2/20 00:30	45.4	↑4.3
2/20 00:40	49.8	↑4.4
2/20 00:50	54.1	↑4.3
2/20 01:00	58.4	↑4.3
2/20 01:10	62.7	↑4.3
2/20 01:20	66.9	↑4.2
2/20 01:30	71.1	↑4.2
2/20 01:40	75.1	↑4.0
2/20 01:50	79.0	↑3.9
2/20 02:00	82.8	↑3.8
2/20 02:10	86.4	↑3.6
2/20 02:20	89.8	↑3.4
2/20 02:30	93.0	↑3.2
2/20 02:40	95.9	↑2.9
2/20 02:50	98.7	↑2.8
2/20 03:00	101.2	↑2.5
2/20 03:10	103.4	↑2.2
2/20 03:20	105.4	↑2.0
2/20 03:30	107.1	↑1.7
2/20 03:40	108.5	↑1.4
2/20 03:50	109.6	↑1.1
2/20 04:00	110.5	↑0.9
2/20 04:10	111.1	↑0.6
2/20 04:20	111.4	↑0.3	満潮
2/20 04:30	111.4	0
2/20 04:40	111.2	↓-0.2
2/20 04:50	110.7	↓-0.5
2/20 05:00	110.0	↓-0.7
2/20 05:10	109.0	↓-1.0
2/20 05:20	107.8	↓-1.2
2/20 05:30	106.4	↓-1.4
2/20 05:40	104.9	↓-1.5
2/20 05:50	103.1	↓-1.8
2/20 06:00	101.3	↓-1.8
2/20 06:10	99.3	↓-2.0
2/20 06:20	97.2	↓-2.1
2/20 06:30	95.0	↓-2.2
2/20 06:40	92.8	↓-2.2
2/20 06:50	90.5	↓-2.3
2/20 07:00	88.2	↓-2.3
2/20 07:10	86.0	↓-2.2
2/20 07:20	83.7	↓-2.3
2/20 07:30	81.6	↓-2.1
2/20 07:40	79.5	↓-2.1
2/20 07:50	77.5	↓-2.0
2/20 08:00	75.7	↓-1.8
2/20 08:10	74.0	↓-1.7
2/20 08:20	72.4	↓-1.6
2/20 08:30	71.0	↓-1.4
2/20 08:40	69.8	↓-1.2
2/20 08:50	68.8	↓-1.0
2/20 09:00	68.1	↓-0.7
2/20 09:10	67.5	↓-0.6
2/20 09:20	67.1	↓-0.4
2/20 09:30	67.0	↓-0.1	干潮
2/20 09:40	67.1	↑0.1
2/20 09:50	67.5	↑0.4
2/20 10:00	68.0	↑0.5
2/20 10:10	68.8	↑0.8
2/20 10:20	69.8	↑1.0
2/20 10:30	71.0	↑1.2
2/20 10:40	72.4	↑1.4
2/20 10:50	74.0	↑1.6
2/20 11:00	75.8	↑1.8
2/20 11:10	77.7	↑1.9
2/20 11:20	79.8	↑2.1
2/20 11:30	82.0	↑2.2
2/20 11:40	84.3	↑2.3
2/20 11:50	86.7	↑2.4
2/20 12:00	89.2	↑2.5
2/20 12:10	91.7	↑2.5
2/20 12:20	94.3	↑2.6
2/20 12:30	96.8	↑2.5
2/20 12:40	99.4	↑2.6
2/20 12:50	101.9	↑2.5
2/20 13:00	104.3	↑2.4
2/20 13:10	106.7	↑2.4
2/20 13:20	108.9	↑2.2
2/20 13:30	111.1	↑2.2
2/20 13:40	113.0	↑1.9
2/20 13:50	114.9	↑1.9
2/20 14:00	116.5	↑1.6
2/20 14:10	118.0	↑1.5
2/20 14:20	119.2	↑1.2
2/20 14:30	120.2	↑1.0
2/20 14:40	120.9	↑0.7
2/20 14:50	121.4	↑0.5
2/20 15:00	121.6	↑0.2	満潮
2/20 15:10	121.5	↓-0.1
2/20 15:20	121.1	↓-0.4
2/20 15:30	120.5	↓-0.6
2/20 15:40	119.5	↓-1.0
2/20 15:50	118.2	↓-1.3
2/20 16:00	116.6	↓-1.6
2/20 16:10	114.7	↓-1.9
2/20 16:20	112.6	↓-2.1
2/20 16:30	110.1	↓-2.5
2/20 16:40	107.3	↓-2.8
2/20 16:50	104.3	↓-3.0
2/20 17:00	101.0	↓-3.3
2/20 17:10	97.5	↓-3.5
2/20 17:20	93.7	↓-3.8
2/20 17:30	89.7	↓-4.0
2/20 17:40	85.6	↓-4.1
2/20 17:50	81.2	↓-4.4
2/20 18:00	76.8	↓-4.4
2/20 18:10	72.2	↓-4.6
2/20 18:20	67.5	↓-4.7
2/20 18:30	62.8	↓-4.7
2/20 18:40	58.0	↓-4.8	最大潮位差
2/20 18:50	53.2	↓-4.8	最大潮位差
2/20 19:00	48.5	↓-4.7
2/20 19:10	43.8	↓-4.7
2/20 19:20	39.1	↓-4.7
2/20 19:30	34.6	↓-4.5
2/20 19:40	30.2	↓-4.4
2/20 19:50	26.0	↓-4.2
2/20 20:00	22.0	↓-4.0
2/20 20:10	18.2	↓-3.8
2/20 20:20	14.6	↓-3.6
2/20 20:30	11.3	↓-3.3
2/20 20:40	8.3	↓-3.0
2/20 20:50	5.6	↓-2.7
2/20 21:00	3.2	↓-2.4
2/20 21:10	1.1	↓-2.1
2/20 21:20	-0.7	↓-1.8
2/20 21:30	-2.0	↓-1.3
2/20 21:40	-3.1	↓-1.1
2/20 21:50	-3.7	↓-0.6
2/20 22:00	-4.0	↓-0.3	干潮
2/20 22:10	-4.0	0
2/20 22:20	-3.5	↑0.5
2/20 22:30	-2.8	↑0.7
2/20 22:40	-1.6	↑1.2
2/20 22:50	-0.1	↑1.5
2/20 23:00	1.7	↑1.8
2/20 23:10	3.8	↑2.1
2/20 23:20	6.2	↑2.4
2/20 23:30	9.0	↑2.8
2/20 23:40	12.0	↑3.0
2/20 23:50	15.2	↑3.2