20 (木)	05:47	00:15	20:24	12:58
	105cm	69cm	96cm	11cm
中潮 出 04:58 入 18:17 出 08:19 入 22:57 潮干狩り ◎ 10:50～15:14

那珂湊（茨城）2056年04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
4/20 00:00	68.3	↓-0.4
4/20 00:10	68.2	↓-0.1	干潮
4/20 00:20	68.2	0
4/20 00:30	68.4	↑0.2
4/20 00:40	68.7	↑0.3
4/20 00:50	69.2	↑0.5
4/20 01:00	69.9	↑0.7
4/20 01:10	70.7	↑0.8
4/20 01:20	71.6	↑0.9
4/20 01:30	72.7	↑1.1
4/20 01:40	73.9	↑1.2
4/20 01:50	75.2	↑1.3
4/20 02:00	76.6	↑1.4
4/20 02:10	78.1	↑1.5
4/20 02:20	79.7	↑1.6
4/20 02:30	81.3	↑1.6
4/20 02:40	82.9	↑1.6
4/20 02:50	84.6	↑1.7
4/20 03:00	86.3	↑1.7
4/20 03:10	88.0	↑1.7
4/20 03:20	89.7	↑1.7
4/20 03:30	91.3	↑1.6
4/20 03:40	92.9	↑1.6
4/20 03:50	94.5	↑1.6
4/20 04:00	96.0	↑1.5
4/20 04:10	97.4	↑1.4
4/20 04:20	98.7	↑1.3
4/20 04:30	99.9	↑1.2
4/20 04:40	101.0	↑1.1
4/20 04:50	102.0	↑1.0
4/20 05:00	102.8	↑0.8
4/20 05:10	103.5	↑0.7
4/20 05:20	104.0	↑0.5
4/20 05:30	104.4	↑0.4
4/20 05:40	104.6	↑0.2	満潮
4/20 05:50	104.6	0
4/20 06:00	104.5	↓-0.1
4/20 06:10	104.1	↓-0.4
4/20 06:20	103.5	↓-0.6
4/20 06:30	102.8	↓-0.7
4/20 06:40	101.8	↓-1.0
4/20 06:50	100.6	↓-1.2
4/20 07:00	99.2	↓-1.4
4/20 07:10	97.6	↓-1.6
4/20 07:20	95.8	↓-1.8
4/20 07:30	93.8	↓-2.0
4/20 07:40	91.6	↓-2.2
4/20 07:50	89.2	↓-2.4
4/20 08:00	86.6	↓-2.6
4/20 08:10	83.9	↓-2.7
4/20 08:20	81.0	↓-2.9
4/20 08:30	77.9	↓-3.1
4/20 08:40	74.7	↓-3.2
4/20 08:50	71.4	↓-3.3
4/20 09:00	68.1	↓-3.3
4/20 09:10	64.6	↓-3.5
4/20 09:20	61.1	↓-3.5
4/20 09:30	57.6	↓-3.5
4/20 09:40	54.0	↓-3.6	最大潮位差
4/20 09:50	50.5	↓-3.5
4/20 10:00	46.9	↓-3.6	最大潮位差
4/20 10:10	43.5	↓-3.4
4/20 10:20	40.1	↓-3.4
4/20 10:30	36.8	↓-3.3
4/20 10:40	33.7	↓-3.1
4/20 10:50	30.6	↓-3.1
4/20 11:00	27.8	↓-2.8
4/20 11:10	25.1	↓-2.7
4/20 11:20	22.6	↓-2.5
4/20 11:30	20.3	↓-2.3
4/20 11:40	18.3	↓-2.0
4/20 11:50	16.4	↓-1.9
4/20 12:00	14.8	↓-1.6
4/20 12:10	13.5	↓-1.3
4/20 12:20	12.4	↓-1.1
4/20 12:30	11.6	↓-0.8
4/20 12:40	11.0	↓-0.6
4/20 12:50	10.7	↓-0.3	干潮
4/20 13:00	10.6	↓-0.1
4/20 13:10	10.8	↑0.2
4/20 13:20	11.3	↑0.5
4/20 13:30	12.0	↑0.7
4/20 13:40	12.9	↑0.9
4/20 13:50	14.0	↑1.1
4/20 14:00	15.4	↑1.4
4/20 14:10	16.9	↑1.5
4/20 14:20	18.7	↑1.8
4/20 14:30	20.6	↑1.9
4/20 14:40	22.7	↑2.1
4/20 14:50	24.9	↑2.2
4/20 15:00	27.3	↑2.4
4/20 15:10	29.8	↑2.5
4/20 15:20	32.4	↑2.6
4/20 15:30	35.1	↑2.7
4/20 15:40	37.9	↑2.8
4/20 15:50	40.8	↑2.9
4/20 16:00	43.7	↑2.9
4/20 16:10	46.6	↑2.9
4/20 16:20	49.5	↑2.9
4/20 16:30	52.5	↑3.0
4/20 16:40	55.4	↑2.9
4/20 16:50	58.4	↑3.0
4/20 17:00	61.3	↑2.9
4/20 17:10	64.1	↑2.8
4/20 17:20	66.9	↑2.8
4/20 17:30	69.6	↑2.7
4/20 17:40	72.3	↑2.7
4/20 17:50	74.8	↑2.5
4/20 18:00	77.2	↑2.4
4/20 18:10	79.6	↑2.4
4/20 18:20	81.7	↑2.1
4/20 18:30	83.8	↑2.1
4/20 18:40	85.7	↑1.9
4/20 18:50	87.4	↑1.7
4/20 19:00	89.0	↑1.6
4/20 19:10	90.4	↑1.4
4/20 19:20	91.6	↑1.2
4/20 19:30	92.6	↑1.0
4/20 19:40	93.5	↑0.9
4/20 19:50	94.1	↑0.6
4/20 20:00	94.6	↑0.5
4/20 20:10	94.9	↑0.3
4/20 20:20	95.1	↑0.2	満潮
4/20 20:30	95.0	↓-0.1
4/20 20:40	94.8	↓-0.2
4/20 20:50	94.5	↓-0.3
4/20 21:00	93.9	↓-0.6
4/20 21:10	93.3	↓-0.6
4/20 21:20	92.5	↓-0.8
4/20 21:30	91.6	↓-0.9
4/20 21:40	90.7	↓-0.9
4/20 21:50	89.6	↓-1.1
4/20 22:00	88.5	↓-1.1
4/20 22:10	87.3	↓-1.2
4/20 22:20	86.1	↓-1.2
4/20 22:30	84.9	↓-1.2
4/20 22:40	83.7	↓-1.2
4/20 22:50	82.5	↓-1.2
4/20 23:00	81.3	↓-1.2
4/20 23:10	80.2	↓-1.1
4/20 23:20	79.2	↓-1.0
4/20 23:30	78.3	↓-0.9
4/20 23:40	77.4	↓-0.9
4/20 23:50	76.6	↓-0.8