20 (日)	00:03	05:59	09:59	17:26
	94cm	75cm	84cm	30cm
小潮 出 04:58 入 18:17 出 01:33 入 12:15 潮干狩り ○ 16:53～17:57

那珂湊（茨城）2036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	93.8	↑0.1	満潮
4/20 00:10	93.8	0
4/20 00:20	93.6	↓-0.2
4/20 00:30	93.4	↓-0.2
4/20 00:40	93.1	↓-0.3
4/20 00:50	92.7	↓-0.4
4/20 01:00	92.2	↓-0.5
4/20 01:10	91.6	↓-0.6
4/20 01:20	91.0	↓-0.6
4/20 01:30	90.4	↓-0.6
4/20 01:40	89.6	↓-0.8
4/20 01:50	88.9	↓-0.7
4/20 02:00	88.1	↓-0.8
4/20 02:10	87.3	↓-0.8
4/20 02:20	86.5	↓-0.8
4/20 02:30	85.7	↓-0.8
4/20 02:40	84.9	↓-0.8
4/20 02:50	84.1	↓-0.8
4/20 03:00	83.2	↓-0.9
4/20 03:10	82.4	↓-0.8
4/20 03:20	81.7	↓-0.7
4/20 03:30	80.9	↓-0.8
4/20 03:40	80.2	↓-0.7
4/20 03:50	79.5	↓-0.7
4/20 04:00	78.8	↓-0.7
4/20 04:10	78.2	↓-0.6
4/20 04:20	77.6	↓-0.6
4/20 04:30	77.1	↓-0.5
4/20 04:40	76.6	↓-0.5
4/20 04:50	76.2	↓-0.4
4/20 05:00	75.8	↓-0.4
4/20 05:10	75.5	↓-0.3
4/20 05:20	75.2	↓-0.3
4/20 05:30	75.0	↓-0.2
4/20 05:40	74.9	↓-0.1
4/20 05:50	74.8	↓-0.1	干潮
4/20 06:00	74.8	0
4/20 06:10	74.8	0
4/20 06:20	74.9	↑0.1
4/20 06:30	75.1	↑0.2
4/20 06:40	75.3	↑0.2
4/20 06:50	75.6	↑0.3
4/20 07:00	75.9	↑0.3
4/20 07:10	76.3	↑0.4
4/20 07:20	76.7	↑0.4
4/20 07:30	77.2	↑0.5
4/20 07:40	77.7	↑0.5
4/20 07:50	78.2	↑0.5
4/20 08:00	78.7	↑0.5
4/20 08:10	79.3	↑0.6
4/20 08:20	79.8	↑0.5
4/20 08:30	80.4	↑0.6
4/20 08:40	80.9	↑0.5
4/20 08:50	81.4	↑0.5
4/20 09:00	81.8	↑0.4
4/20 09:10	82.2	↑0.4
4/20 09:20	82.5	↑0.3
4/20 09:30	82.8	↑0.3
4/20 09:40	83.0	↑0.2
4/20 09:50	83.1	↑0.1	満潮
4/20 10:00	83.1	0
4/20 10:10	83.1	0
4/20 10:20	82.9	↓-0.2
4/20 10:30	82.6	↓-0.3
4/20 10:40	82.2	↓-0.4
4/20 10:50	81.7	↓-0.5
4/20 11:00	81.1	↓-0.6
4/20 11:10	80.3	↓-0.8
4/20 11:20	79.5	↓-0.8
4/20 11:30	78.5	↓-1.0
4/20 11:40	77.4	↓-1.1
4/20 11:50	76.2	↓-1.2
4/20 12:00	74.9	↓-1.3
4/20 12:10	73.5	↓-1.4
4/20 12:20	72.1	↓-1.4
4/20 12:30	70.5	↓-1.6
4/20 12:40	68.9	↓-1.6
4/20 12:50	67.2	↓-1.7
4/20 13:00	65.4	↓-1.8
4/20 13:10	63.6	↓-1.8
4/20 13:20	61.8	↓-1.8
4/20 13:30	59.9	↓-1.9
4/20 13:40	58.0	↓-1.9
4/20 13:50	56.1	↓-1.9
4/20 14:00	54.2	↓-1.9
4/20 14:10	52.3	↓-1.9
4/20 14:20	50.5	↓-1.8
4/20 14:30	48.6	↓-1.9
4/20 14:40	46.8	↓-1.8
4/20 14:50	45.1	↓-1.7
4/20 15:00	43.4	↓-1.7
4/20 15:10	41.8	↓-1.6
4/20 15:20	40.2	↓-1.6
4/20 15:30	38.8	↓-1.4
4/20 15:40	37.4	↓-1.4
4/20 15:50	36.1	↓-1.3
4/20 16:00	35.0	↓-1.1
4/20 16:10	33.9	↓-1.1
4/20 16:20	32.9	↓-1.0
4/20 16:30	32.1	↓-0.8
4/20 16:40	31.4	↓-0.7
4/20 16:50	30.8	↓-0.6
4/20 17:00	30.4	↓-0.4
4/20 17:10	30.1	↓-0.3
4/20 17:20	30.0	↓-0.1	干潮
4/20 17:30	30.0	0
4/20 17:40	30.1	↑0.1
4/20 17:50	30.4	↑0.3
4/20 18:00	30.9	↑0.5
4/20 18:10	31.5	↑0.6
4/20 18:20	32.2	↑0.7
4/20 18:30	33.2	↑1.0
4/20 18:40	34.2	↑1.0
4/20 18:50	35.4	↑1.2
4/20 19:00	36.8	↑1.4
4/20 19:10	38.3	↑1.5
4/20 19:20	39.9	↑1.6
4/20 19:30	41.7	↑1.8
4/20 19:40	43.6	↑1.9
4/20 19:50	45.6	↑2.0
4/20 20:00	47.6	↑2.0
4/20 20:10	49.8	↑2.2
4/20 20:20	52.1	↑2.3
4/20 20:30	54.4	↑2.3
4/20 20:40	56.8	↑2.4
4/20 20:50	59.3	↑2.5	最大潮位差
4/20 21:00	61.7	↑2.4
4/20 21:10	64.2	↑2.5	最大潮位差
4/20 21:20	66.7	↑2.5	最大潮位差
4/20 21:30	69.1	↑2.4
4/20 21:40	71.5	↑2.4
4/20 21:50	73.9	↑2.4
4/20 22:00	76.3	↑2.4
4/20 22:10	78.5	↑2.2
4/20 22:20	80.7	↑2.2
4/20 22:30	82.8	↑2.1
4/20 22:40	84.8	↑2.0
4/20 22:50	86.7	↑1.9
4/20 23:00	88.4	↑1.7
4/20 23:10	90.0	↑1.6
4/20 23:20	91.5	↑1.5
4/20 23:30	92.8	↑1.3
4/20 23:40	94.0	↑1.2
4/20 23:50	95.1	↑1.1