20 (火)	09:26	05:28	-	17:11
	86cm	79cm	-	28cm
小潮 出 04:59 入 18:17 出 01:30 入 12:06 潮干狩り ○ 16:06～18:12

那珂湊（茨城）2055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	93.2	↓-0.1
4/20 00:10	93.0	↓-0.2
4/20 00:20	92.8	↓-0.2
4/20 00:30	92.5	↓-0.3
4/20 00:40	92.1	↓-0.4
4/20 00:50	91.6	↓-0.5
4/20 01:00	91.1	↓-0.5
4/20 01:10	90.6	↓-0.5
4/20 01:20	90.0	↓-0.6
4/20 01:30	89.3	↓-0.7
4/20 01:40	88.7	↓-0.6
4/20 01:50	88.0	↓-0.7
4/20 02:00	87.3	↓-0.7
4/20 02:10	86.6	↓-0.7
4/20 02:20	85.9	↓-0.7
4/20 02:30	85.3	↓-0.6
4/20 02:40	84.6	↓-0.7
4/20 02:50	83.9	↓-0.7
4/20 03:00	83.3	↓-0.6
4/20 03:10	82.7	↓-0.6
4/20 03:20	82.1	↓-0.6
4/20 03:30	81.5	↓-0.6
4/20 03:40	81.0	↓-0.5
4/20 03:50	80.5	↓-0.5
4/20 04:00	80.0	↓-0.5
4/20 04:10	79.6	↓-0.4
4/20 04:20	79.2	↓-0.4
4/20 04:30	78.9	↓-0.3
4/20 04:40	78.6	↓-0.3
4/20 04:50	78.4	↓-0.2
4/20 05:00	78.2	↓-0.2
4/20 05:10	78.1	↓-0.1
4/20 05:20	78.0	↓-0.1	干潮
4/20 05:30	78.0	0
4/20 05:40	78.1	↑0.1
4/20 05:50	78.2	↑0.1
4/20 06:00	78.3	↑0.1
4/20 06:10	78.6	↑0.3
4/20 06:20	78.8	↑0.2
4/20 06:30	79.1	↑0.3
4/20 06:40	79.5	↑0.4
4/20 06:50	79.9	↑0.4
4/20 07:00	80.3	↑0.4
4/20 07:10	80.8	↑0.5
4/20 07:20	81.3	↑0.5
4/20 07:30	81.8	↑0.5
4/20 07:40	82.3	↑0.5
4/20 07:50	82.8	↑0.5
4/20 08:00	83.3	↑0.5
4/20 08:10	83.8	↑0.5
4/20 08:20	84.2	↑0.4
4/20 08:30	84.6	↑0.4
4/20 08:40	85.0	↑0.4
4/20 08:50	85.3	↑0.3
4/20 09:00	85.6	↑0.3
4/20 09:10	85.7	↑0.1
4/20 09:20	85.8	↑0.1	満潮
4/20 09:30	85.8	0
4/20 09:40	85.7	↓-0.1
4/20 09:50	85.5	↓-0.2
4/20 10:00	85.2	↓-0.3
4/20 10:10	84.8	↓-0.4
4/20 10:20	84.3	↓-0.5
4/20 10:30	83.6	↓-0.7
4/20 10:40	82.8	↓-0.8
4/20 10:50	81.9	↓-0.9
4/20 11:00	80.9	↓-1.0
4/20 11:10	79.8	↓-1.1
4/20 11:20	78.5	↓-1.3
4/20 11:30	77.2	↓-1.3
4/20 11:40	75.7	↓-1.5
4/20 11:50	74.2	↓-1.5
4/20 12:00	72.5	↓-1.7
4/20 12:10	70.8	↓-1.7
4/20 12:20	69.0	↓-1.8
4/20 12:30	67.2	↓-1.8
4/20 12:40	65.3	↓-1.9
4/20 12:50	63.4	↓-1.9
4/20 13:00	61.4	↓-2.0
4/20 13:10	59.4	↓-2.0
4/20 13:20	57.4	↓-2.0
4/20 13:30	55.4	↓-2.0
4/20 13:40	53.4	↓-2.0
4/20 13:50	51.4	↓-2.0
4/20 14:00	49.5	↓-1.9
4/20 14:10	47.6	↓-1.9
4/20 14:20	45.7	↓-1.9
4/20 14:30	43.9	↓-1.8
4/20 14:40	42.1	↓-1.8
4/20 14:50	40.4	↓-1.7
4/20 15:00	38.8	↓-1.6
4/20 15:10	37.3	↓-1.5
4/20 15:20	35.9	↓-1.4
4/20 15:30	34.5	↓-1.4
4/20 15:40	33.3	↓-1.2
4/20 15:50	32.2	↓-1.1
4/20 16:00	31.2	↓-1.0
4/20 16:10	30.3	↓-0.9
4/20 16:20	29.5	↓-0.8
4/20 16:30	28.9	↓-0.6
4/20 16:40	28.4	↓-0.5
4/20 16:50	28.1	↓-0.3
4/20 17:00	27.8	↓-0.3
4/20 17:10	27.8	0	干潮
4/20 17:20	27.8	0
4/20 17:30	28.1	↑0.3
4/20 17:40	28.5	↑0.4
4/20 17:50	29.0	↑0.5
4/20 18:00	29.7	↑0.7
4/20 18:10	30.5	↑0.8
4/20 18:20	31.5	↑1.0
4/20 18:30	32.7	↑1.2
4/20 18:40	34.0	↑1.3
4/20 18:50	35.4	↑1.4
4/20 19:00	37.0	↑1.6
4/20 19:10	38.7	↑1.7
4/20 19:20	40.5	↑1.8
4/20 19:30	42.4	↑1.9
4/20 19:40	44.5	↑2.1
4/20 19:50	46.6	↑2.1
4/20 20:00	48.8	↑2.2
4/20 20:10	51.1	↑2.3
4/20 20:20	53.5	↑2.4
4/20 20:30	55.9	↑2.4
4/20 20:40	58.3	↑2.4
4/20 20:50	60.8	↑2.5	最大潮位差
4/20 21:00	63.3	↑2.5	最大潮位差
4/20 21:10	65.7	↑2.4
4/20 21:20	68.2	↑2.5	最大潮位差
4/20 21:30	70.6	↑2.4
4/20 21:40	72.9	↑2.3
4/20 21:50	75.2	↑2.3
4/20 22:00	77.5	↑2.3
4/20 22:10	79.6	↑2.1
4/20 22:20	81.6	↑2.0
4/20 22:30	83.6	↑2.0
4/20 22:40	85.4	↑1.8
4/20 22:50	87.1	↑1.7
4/20 23:00	88.6	↑1.5
4/20 23:10	90.1	↑1.5
4/20 23:20	91.4	↑1.3
4/20 23:30	92.5	↑1.1
4/20 23:40	93.5	↑1.0
4/20 23:50	94.4	↑0.9