20 (火)	06:59	01:57	-	15:36
	97cm	87cm	-	19cm
小潮 出 04:59 入 18:17 出 10:31 入 00:44 潮干狩り ○ 13:29～17:47

那珂湊（茨城）2021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	89.3	↓-0.4
4/20 00:10	89.0	↓-0.3
4/20 00:20	88.6	↓-0.4
4/20 00:30	88.3	↓-0.3
4/20 00:40	88.0	↓-0.3
4/20 00:50	87.7	↓-0.3
4/20 01:00	87.4	↓-0.3
4/20 01:10	87.2	↓-0.2
4/20 01:20	87.0	↓-0.2
4/20 01:30	86.8	↓-0.2
4/20 01:40	86.7	↓-0.1
4/20 01:50	86.6	↓-0.1	干潮
4/20 02:00	86.6	0
4/20 02:10	86.7	↑0.1
4/20 02:20	86.8	↑0.1
4/20 02:30	86.9	↑0.1
4/20 02:40	87.1	↑0.2
4/20 02:50	87.4	↑0.3
4/20 03:00	87.7	↑0.3
4/20 03:10	88.0	↑0.3
4/20 03:20	88.4	↑0.4
4/20 03:30	88.8	↑0.4
4/20 03:40	89.2	↑0.4
4/20 03:50	89.7	↑0.5
4/20 04:00	90.2	↑0.5
4/20 04:10	90.7	↑0.5
4/20 04:20	91.2	↑0.5
4/20 04:30	91.7	↑0.5
4/20 04:40	92.2	↑0.5
4/20 04:50	92.7	↑0.5
4/20 05:00	93.2	↑0.5
4/20 05:10	93.7	↑0.5
4/20 05:20	94.1	↑0.4
4/20 05:30	94.6	↑0.5
4/20 05:40	95.0	↑0.4
4/20 05:50	95.4	↑0.4
4/20 06:00	95.7	↑0.3
4/20 06:10	96.0	↑0.3
4/20 06:20	96.3	↑0.3
4/20 06:30	96.5	↑0.2
4/20 06:40	96.7	↑0.2
4/20 06:50	96.8	↑0.1	満潮
4/20 07:00	96.8	0
4/20 07:10	96.7	↓-0.1
4/20 07:20	96.6	↓-0.1
4/20 07:30	96.4	↓-0.2
4/20 07:40	96.1	↓-0.3
4/20 07:50	95.7	↓-0.4
4/20 08:00	95.2	↓-0.5
4/20 08:10	94.5	↓-0.7
4/20 08:20	93.8	↓-0.7
4/20 08:30	93.0	↓-0.8
4/20 08:40	92.0	↓-1.0
4/20 08:50	91.0	↓-1.0
4/20 09:00	89.8	↓-1.2
4/20 09:10	88.4	↓-1.4
4/20 09:20	87.0	↓-1.4
4/20 09:30	85.4	↓-1.6
4/20 09:40	83.8	↓-1.6
4/20 09:50	82.0	↓-1.8
4/20 10:00	80.0	↓-2.0
4/20 10:10	78.0	↓-2.0
4/20 10:20	75.9	↓-2.1
4/20 10:30	73.7	↓-2.2
4/20 10:40	71.4	↓-2.3
4/20 10:50	69.0	↓-2.4
4/20 11:00	66.6	↓-2.4
4/20 11:10	64.1	↓-2.5
4/20 11:20	61.5	↓-2.6	最大潮位差
4/20 11:30	58.9	↓-2.6	最大潮位差
4/20 11:40	56.4	↓-2.5
4/20 11:50	53.8	↓-2.6	最大潮位差
4/20 12:00	51.2	↓-2.6	最大潮位差
4/20 12:10	48.6	↓-2.6	最大潮位差
4/20 12:20	46.1	↓-2.5
4/20 12:30	43.6	↓-2.5
4/20 12:40	41.2	↓-2.4
4/20 12:50	38.9	↓-2.3
4/20 13:00	36.6	↓-2.3
4/20 13:10	34.5	↓-2.1
4/20 13:20	32.4	↓-2.1
4/20 13:30	30.5	↓-1.9
4/20 13:40	28.7	↓-1.8
4/20 13:50	27.0	↓-1.7
4/20 14:00	25.5	↓-1.5
4/20 14:10	24.1	↓-1.4
4/20 14:20	22.8	↓-1.3
4/20 14:30	21.7	↓-1.1
4/20 14:40	20.8	↓-0.9
4/20 14:50	20.0	↓-0.8
4/20 15:00	19.4	↓-0.6
4/20 15:10	18.9	↓-0.5
4/20 15:20	18.6	↓-0.3
4/20 15:30	18.4	↓-0.2	干潮
4/20 15:40	18.4	0
4/20 15:50	18.5	↑0.1
4/20 16:00	18.9	↑0.4
4/20 16:10	19.3	↑0.4
4/20 16:20	19.9	↑0.6
4/20 16:30	20.6	↑0.7
4/20 16:40	21.5	↑0.9
4/20 16:50	22.6	↑1.1
4/20 17:00	23.7	↑1.1
4/20 17:10	25.0	↑1.3
4/20 17:20	26.4	↑1.4
4/20 17:30	27.9	↑1.5
4/20 17:40	29.5	↑1.6
4/20 17:50	31.3	↑1.8
4/20 18:00	33.1	↑1.8
4/20 18:10	35.1	↑2.0
4/20 18:20	37.1	↑2.0
4/20 18:30	39.2	↑2.1
4/20 18:40	41.4	↑2.2
4/20 18:50	43.6	↑2.2
4/20 19:00	45.9	↑2.3
4/20 19:10	48.2	↑2.3
4/20 19:20	50.6	↑2.4
4/20 19:30	53.0	↑2.4
4/20 19:40	55.4	↑2.4
4/20 19:50	57.8	↑2.4
4/20 20:00	60.2	↑2.4
4/20 20:10	62.6	↑2.4
4/20 20:20	65.0	↑2.4
4/20 20:30	67.3	↑2.3
4/20 20:40	69.6	↑2.3
4/20 20:50	71.8	↑2.2
4/20 21:00	73.9	↑2.1
4/20 21:10	76.0	↑2.1
4/20 21:20	78.0	↑2.0
4/20 21:30	79.8	↑1.8
4/20 21:40	81.6	↑1.8
4/20 21:50	83.3	↑1.7
4/20 22:00	84.8	↑1.5
4/20 22:10	86.3	↑1.5
4/20 22:20	87.6	↑1.3
4/20 22:30	88.8	↑1.2
4/20 22:40	89.8	↑1.0
4/20 22:50	90.8	↑1.0
4/20 23:00	91.6	↑0.8
4/20 23:10	92.3	↑0.7
4/20 23:20	92.9	↑0.6
4/20 23:30	93.3	↑0.4
4/20 23:40	93.7	↑0.4
4/20 23:50	93.9	↑0.2