20 (金)	07:29	03:39	-	16:22
	91cm	88cm	-	24cm
長潮 出 04:58 入 18:17 出 11:12 入 01:19 潮干狩り ○ 14:37～18:04

那珂湊（茨城）2040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	91.6	0
4/20 00:10	91.5	↓-0.1
4/20 00:20	91.3	↓-0.2
4/20 00:30	91.2	↓-0.1
4/20 00:40	90.9	↓-0.3
4/20 00:50	90.7	↓-0.2
4/20 01:00	90.5	↓-0.2
4/20 01:10	90.2	↓-0.3
4/20 01:20	90.0	↓-0.2
4/20 01:30	89.7	↓-0.3
4/20 01:40	89.4	↓-0.3
4/20 01:50	89.2	↓-0.2
4/20 02:00	89.0	↓-0.2
4/20 02:10	88.8	↓-0.2
4/20 02:20	88.6	↓-0.2
4/20 02:30	88.4	↓-0.2
4/20 02:40	88.3	↓-0.1
4/20 02:50	88.1	↓-0.2
4/20 03:00	88.0	↓-0.1
4/20 03:10	88.0	0
4/20 03:20	87.9	↓-0.1
4/20 03:30	87.9	0	干潮
4/20 03:40	87.9	0
4/20 03:50	87.9	0
4/20 04:00	87.9	0
4/20 04:10	88.0	↑0.1
4/20 04:20	88.1	↑0.1
4/20 04:30	88.1	0
4/20 04:40	88.3	↑0.2
4/20 04:50	88.4	↑0.1
4/20 05:00	88.5	↑0.1
4/20 05:10	88.6	↑0.1
4/20 05:20	88.8	↑0.2
4/20 05:30	89.0	↑0.2
4/20 05:40	89.1	↑0.1
4/20 05:50	89.3	↑0.2
4/20 06:00	89.5	↑0.2
4/20 06:10	89.6	↑0.1
4/20 06:20	89.8	↑0.2
4/20 06:30	90.0	↑0.2
4/20 06:40	90.1	↑0.1
4/20 06:50	90.2	↑0.1
4/20 07:00	90.3	↑0.1
4/20 07:10	90.4	↑0.1
4/20 07:20	90.5	↑0.1	満潮
4/20 07:30	90.5	0
4/20 07:40	90.5	0
4/20 07:50	90.4	↓-0.1
4/20 08:00	90.2	↓-0.2
4/20 08:10	90.0	↓-0.2
4/20 08:20	89.8	↓-0.2
4/20 08:30	89.4	↓-0.4
4/20 08:40	89.0	↓-0.4
4/20 08:50	88.5	↓-0.5
4/20 09:00	87.9	↓-0.6
4/20 09:10	87.2	↓-0.7
4/20 09:20	86.5	↓-0.7
4/20 09:30	85.6	↓-0.9
4/20 09:40	84.6	↓-1.0
4/20 09:50	83.5	↓-1.1
4/20 10:00	82.3	↓-1.2
4/20 10:10	81.0	↓-1.3
4/20 10:20	79.6	↓-1.4
4/20 10:30	78.0	↓-1.6
4/20 10:40	76.4	↓-1.6
4/20 10:50	74.7	↓-1.7
4/20 11:00	72.9	↓-1.8
4/20 11:10	71.1	↓-1.8
4/20 11:20	69.1	↓-2.0
4/20 11:30	67.1	↓-2.0
4/20 11:40	65.1	↓-2.0
4/20 11:50	63.0	↓-2.1
4/20 12:00	60.8	↓-2.2
4/20 12:10	58.7	↓-2.1
4/20 12:20	56.5	↓-2.2
4/20 12:30	54.3	↓-2.2
4/20 12:40	52.1	↓-2.2
4/20 12:50	50.0	↓-2.1
4/20 13:00	47.9	↓-2.1
4/20 13:10	45.8	↓-2.1
4/20 13:20	43.7	↓-2.1
4/20 13:30	41.8	↓-1.9
4/20 13:40	39.9	↓-1.9
4/20 13:50	38.0	↓-1.9
4/20 14:00	36.3	↓-1.7
4/20 14:10	34.6	↓-1.7
4/20 14:20	33.0	↓-1.6
4/20 14:30	31.6	↓-1.4
4/20 14:40	30.2	↓-1.4
4/20 14:50	29.0	↓-1.2
4/20 15:00	27.9	↓-1.1
4/20 15:10	26.9	↓-1.0
4/20 15:20	26.0	↓-0.9
4/20 15:30	25.3	↓-0.7
4/20 15:40	24.6	↓-0.7
4/20 15:50	24.2	↓-0.4
4/20 16:00	23.8	↓-0.4
4/20 16:10	23.6	↓-0.2
4/20 16:20	23.5	↓-0.1	干潮
4/20 16:30	23.6	↑0.1
4/20 16:40	23.8	↑0.2
4/20 16:50	24.1	↑0.3
4/20 17:00	24.6	↑0.5
4/20 17:10	25.2	↑0.6
4/20 17:20	25.9	↑0.7
4/20 17:30	26.8	↑0.9
4/20 17:40	27.8	↑1.0
4/20 17:50	28.9	↑1.1
4/20 18:00	30.2	↑1.3
4/20 18:10	31.6	↑1.4
4/20 18:20	33.0	↑1.4
4/20 18:30	34.7	↑1.7
4/20 18:40	36.4	↑1.7
4/20 18:50	38.2	↑1.8
4/20 19:00	40.1	↑1.9
4/20 19:10	42.1	↑2.0
4/20 19:20	44.2	↑2.1
4/20 19:30	46.4	↑2.2
4/20 19:40	48.6	↑2.2
4/20 19:50	50.9	↑2.3
4/20 20:00	53.2	↑2.3
4/20 20:10	55.6	↑2.4	最大潮位差
4/20 20:20	57.9	↑2.3
4/20 20:30	60.3	↑2.4	最大潮位差
4/20 20:40	62.7	↑2.4	最大潮位差
4/20 20:50	65.0	↑2.3
4/20 21:00	67.4	↑2.4	最大潮位差
4/20 21:10	69.7	↑2.3
4/20 21:20	71.9	↑2.2
4/20 21:30	74.1	↑2.2
4/20 21:40	76.2	↑2.1
4/20 21:50	78.2	↑2.0
4/20 22:00	80.2	↑2.0
4/20 22:10	82.0	↑1.8
4/20 22:20	83.8	↑1.8
4/20 22:30	85.4	↑1.6
4/20 22:40	86.9	↑1.5
4/20 22:50	88.3	↑1.4
4/20 23:00	89.6	↑1.3
4/20 23:10	90.8	↑1.2
4/20 23:20	91.8	↑1.0
4/20 23:30	92.7	↑0.9
4/20 23:40	93.5	↑0.8
4/20 23:50	94.2	↑0.7