20 (木)	04:03	09:07	14:36	21:39
	115cm	69cm	125cm	0cm
大潮 出 06:21 入 17:24 出 04:55 入 15:56

大洗（茨城）2031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	48.4	↑4.2
2/20 00:10	52.5	↑4.1
2/20 00:20	56.7	↑4.2
2/20 00:30	60.8	↑4.1
2/20 00:40	65.0	↑4.2
2/20 00:50	69.0	↑4.0
2/20 01:00	73.0	↑4.0
2/20 01:10	77.0	↑4.0
2/20 01:20	80.8	↑3.8
2/20 01:30	84.4	↑3.6
2/20 01:40	88.0	↑3.6
2/20 01:50	91.3	↑3.3
2/20 02:00	94.5	↑3.2
2/20 02:10	97.5	↑3.0
2/20 02:20	100.2	↑2.7
2/20 02:30	102.8	↑2.6
2/20 02:40	105.1	↑2.3
2/20 02:50	107.2	↑2.1
2/20 03:00	109.0	↑1.8
2/20 03:10	110.6	↑1.6
2/20 03:20	111.9	↑1.3
2/20 03:30	112.9	↑1.0
2/20 03:40	113.6	↑0.7
2/20 03:50	114.1	↑0.5
2/20 04:00	114.3	↑0.2	満潮
2/20 04:10	114.2	↓-0.1
2/20 04:20	113.9	↓-0.3
2/20 04:30	113.3	↓-0.6
2/20 04:40	112.4	↓-0.9
2/20 04:50	111.4	↓-1.0
2/20 05:00	110.1	↓-1.3
2/20 05:10	108.6	↓-1.5
2/20 05:20	106.9	↓-1.7
2/20 05:30	105.0	↓-1.9
2/20 05:40	103.0	↓-2.0
2/20 05:50	100.9	↓-2.1
2/20 06:00	98.7	↓-2.2
2/20 06:10	96.4	↓-2.3
2/20 06:20	94.1	↓-2.3
2/20 06:30	91.7	↓-2.4
2/20 06:40	89.4	↓-2.3
2/20 06:50	87.1	↓-2.3
2/20 07:00	84.8	↓-2.3
2/20 07:10	82.6	↓-2.2
2/20 07:20	80.6	↓-2.0
2/20 07:30	78.6	↓-2.0
2/20 07:40	76.7	↓-1.9
2/20 07:50	75.1	↓-1.6
2/20 08:00	73.5	↓-1.6
2/20 08:10	72.2	↓-1.3
2/20 08:20	71.1	↓-1.1
2/20 08:30	70.2	↓-0.9
2/20 08:40	69.4	↓-0.8
2/20 08:50	69.0	↓-0.4
2/20 09:00	68.7	↓-0.3	干潮
2/20 09:10	68.7	0
2/20 09:20	68.9	↑0.2
2/20 09:30	69.4	↑0.5
2/20 09:40	70.1	↑0.7
2/20 09:50	71.0	↑0.9
2/20 10:00	72.1	↑1.1
2/20 10:10	73.5	↑1.4
2/20 10:20	75.1	↑1.6
2/20 10:30	76.8	↑1.7
2/20 10:40	78.8	↑2.0
2/20 10:50	80.9	↑2.1
2/20 11:00	83.2	↑2.3
2/20 11:10	85.5	↑2.3
2/20 11:20	88.0	↑2.5
2/20 11:30	90.6	↑2.6
2/20 11:40	93.3	↑2.7
2/20 11:50	95.9	↑2.6
2/20 12:00	98.6	↑2.7
2/20 12:10	101.3	↑2.7
2/20 12:20	103.9	↑2.6
2/20 12:30	106.5	↑2.6
2/20 12:40	108.9	↑2.4
2/20 12:50	111.3	↑2.4
2/20 13:00	113.5	↑2.2
2/20 13:10	115.6	↑2.1
2/20 13:20	117.5	↑1.9
2/20 13:30	119.2	↑1.7
2/20 13:40	120.8	↑1.6
2/20 13:50	122.0	↑1.2
2/20 14:00	123.1	↑1.1
2/20 14:10	123.9	↑0.8
2/20 14:20	124.4	↑0.5
2/20 14:30	124.7	↑0.3	満潮
2/20 14:40	124.7	0
2/20 14:50	124.4	↓-0.3
2/20 15:00	123.8	↓-0.6
2/20 15:10	123.0	↓-0.8
2/20 15:20	121.8	↓-1.2
2/20 15:30	120.3	↓-1.5
2/20 15:40	118.6	↓-1.7
2/20 15:50	116.5	↓-2.1
2/20 16:00	114.2	↓-2.3
2/20 16:10	111.5	↓-2.7
2/20 16:20	108.6	↓-2.9
2/20 16:30	105.5	↓-3.1
2/20 16:40	102.1	↓-3.4
2/20 16:50	98.4	↓-3.7
2/20 17:00	94.6	↓-3.8
2/20 17:10	90.5	↓-4.1
2/20 17:20	86.3	↓-4.2
2/20 17:30	81.9	↓-4.4
2/20 17:40	77.3	↓-4.6
2/20 17:50	72.7	↓-4.6
2/20 18:00	68.0	↓-4.7
2/20 18:10	63.3	↓-4.7
2/20 18:20	58.5	↓-4.8	最大潮位差
2/20 18:30	53.8	↓-4.7
2/20 18:40	49.1	↓-4.7
2/20 18:50	44.5	↓-4.6
2/20 19:00	40.0	↓-4.5
2/20 19:10	35.6	↓-4.4
2/20 19:20	31.3	↓-4.3
2/20 19:30	27.3	↓-4.0
2/20 19:40	23.4	↓-3.9
2/20 19:50	19.8	↓-3.6
2/20 20:00	16.4	↓-3.4
2/20 20:10	13.3	↓-3.1
2/20 20:20	10.5	↓-2.8
2/20 20:30	8.0	↓-2.5
2/20 20:40	5.8	↓-2.2
2/20 20:50	3.9	↓-1.9
2/20 21:00	2.3	↓-1.6
2/20 21:10	1.2	↓-1.1
2/20 21:20	0.3	↓-0.9
2/20 21:30	-0.1	↓-0.4	干潮
2/20 21:40	-0.2	↓-0.1
2/20 21:50	0.0	↑0.2
2/20 22:00	0.7	0
2/20 22:10	1.7	↑1.0
2/20 22:20	3.0	↑1.3
2/20 22:30	4.7	↑1.7
2/20 22:40	6.7	↑2.0
2/20 22:50	9.1	↑2.4
2/20 23:00	11.8	↑2.7
2/20 23:10	14.7	↑2.9
2/20 23:20	18.0	↑3.3
2/20 23:30	21.4	↑3.4
2/20 23:40	25.2	↑3.8
2/20 23:50	29.1	↑3.9