20 (火)	00:31	06:49	11:41	18:20
	97cm	62cm	83cm	36cm
若潮 出 04:58 入 18:17 出 13:18 入 01:44

那珂湊（茨城）2032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	96.0	↑0.6
4/20 00:10	96.3	↑0.3
4/20 00:20	96.5	↑0.2
4/20 00:30	96.6	↑0.1	満潮
4/20 00:40	96.5	↓-0.1
4/20 00:50	96.3	↓-0.2
4/20 01:00	96.0	↓-0.3
4/20 01:10	95.5	↓-0.5
4/20 01:20	94.9	↓-0.6
4/20 01:30	94.2	↓-0.7
4/20 01:40	93.4	↓-0.8
4/20 01:50	92.4	↓-1.0
4/20 02:00	91.4	↓-1.0
4/20 02:10	90.3	↓-1.1
4/20 02:20	89.2	↓-1.1
4/20 02:30	88.0	↓-1.2
4/20 02:40	86.7	↓-1.3
4/20 02:50	85.4	↓-1.3
4/20 03:00	84.0	↓-1.4
4/20 03:10	82.6	↓-1.4
4/20 03:20	81.2	↓-1.4
4/20 03:30	79.8	↓-1.4
4/20 03:40	78.4	↓-1.4
4/20 03:50	77.0	↓-1.4
4/20 04:00	75.6	↓-1.4
4/20 04:10	74.2	↓-1.4
4/20 04:20	72.9	↓-1.3
4/20 04:30	71.6	↓-1.3
4/20 04:40	70.3	↓-1.3
4/20 04:50	69.1	↓-1.2
4/20 05:00	68.0	↓-1.1
4/20 05:10	67.0	↓-1.0
4/20 05:20	66.0	↓-1.0
4/20 05:30	65.1	↓-0.9
4/20 05:40	64.3	↓-0.8
4/20 05:50	63.6	↓-0.7
4/20 06:00	63.0	↓-0.6
4/20 06:10	62.6	↓-0.4
4/20 06:20	62.2	↓-0.4
4/20 06:30	61.9	↓-0.3
4/20 06:40	61.8	↓-0.1	干潮
4/20 06:50	61.7	↓-0.1
4/20 07:00	61.8	↑0.1
4/20 07:10	62.0	↑0.2
4/20 07:20	62.3	↑0.3
4/20 07:30	62.7	↑0.4
4/20 07:40	63.3	↑0.6
4/20 07:50	63.9	↑0.6
4/20 08:00	64.6	↑0.7
4/20 08:10	65.4	↑0.8
4/20 08:20	66.2	↑0.8
4/20 08:30	67.2	↑1.0
4/20 08:40	68.2	↑1.0
4/20 08:50	69.2	↑1.0
4/20 09:00	70.3	↑1.1
4/20 09:10	71.4	↑1.1
4/20 09:20	72.5	↑1.1
4/20 09:30	73.6	↑1.1
4/20 09:40	74.7	↑1.1
4/20 09:50	75.7	↑1.0
4/20 10:00	76.8	↑1.1
4/20 10:10	77.7	↑0.9
4/20 10:20	78.6	↑0.9
4/20 10:30	79.5	↑0.9
4/20 10:40	80.2	↑0.7
4/20 10:50	80.8	↑0.6
4/20 11:00	81.4	↑0.6
4/20 11:10	81.8	↑0.4
4/20 11:20	82.2	↑0.4
4/20 11:30	82.3	↑0.1
4/20 11:40	82.4	↑0.1	満潮
4/20 11:50	82.4	0
4/20 12:00	82.2	↓-0.2
4/20 12:10	81.8	↓-0.4
4/20 12:20	81.4	↓-0.4
4/20 12:30	80.8	↓-0.6
4/20 12:40	80.1	↓-0.7
4/20 12:50	79.2	↓-0.9
4/20 13:00	78.3	↓-0.9
4/20 13:10	77.2	↓-1.1
4/20 13:20	76.0	↓-1.2
4/20 13:30	74.7	↓-1.3
4/20 13:40	73.3	↓-1.4
4/20 13:50	71.8	↓-1.5
4/20 14:00	70.3	↓-1.5
4/20 14:10	68.7	↓-1.6
4/20 14:20	67.0	↓-1.7
4/20 14:30	65.3	↓-1.7
4/20 14:40	63.5	↓-1.8
4/20 14:50	61.7	↓-1.8
4/20 15:00	59.9	↓-1.8
4/20 15:10	58.0	↓-1.9
4/20 15:20	56.2	↓-1.8
4/20 15:30	54.4	↓-1.8
4/20 15:40	52.6	↓-1.8
4/20 15:50	50.9	↓-1.7
4/20 16:00	49.1	↓-1.8
4/20 16:10	47.5	↓-1.6
4/20 16:20	45.9	↓-1.6
4/20 16:30	44.4	↓-1.5
4/20 16:40	43.0	↓-1.4
4/20 16:50	41.7	↓-1.3
4/20 17:00	40.5	↓-1.2
4/20 17:10	39.4	↓-1.1
4/20 17:20	38.4	↓-1.0
4/20 17:30	37.6	↓-0.8
4/20 17:40	36.9	↓-0.7
4/20 17:50	36.3	↓-0.6
4/20 18:00	35.9	↓-0.4
4/20 18:10	35.7	↓-0.2	干潮
4/20 18:20	35.6	↓-0.1	干潮
4/20 18:30	35.7	↑0.1
4/20 18:40	36.0	↑0.3
4/20 18:50	36.5	↑0.5
4/20 19:00	37.1	↑0.6
4/20 19:10	37.9	↑0.8
4/20 19:20	38.9	↑1.0
4/20 19:30	40.0	↑1.1
4/20 19:40	41.3	↑1.3
4/20 19:50	42.8	↑1.5
4/20 20:00	44.4	↑1.6
4/20 20:10	46.1	↑1.7
4/20 20:20	48.0	↑1.9
4/20 20:30	50.0	↑2.0
4/20 20:40	52.2	↑2.2
4/20 20:50	54.4	↑2.2
4/20 21:00	56.7	↑2.3
4/20 21:10	59.1	↑2.4
4/20 21:20	61.6	↑2.5
4/20 21:30	64.1	↑2.5
4/20 21:40	66.6	↑2.5
4/20 21:50	69.1	↑2.5
4/20 22:00	71.7	↑2.6	最大潮位差
4/20 22:10	74.2	↑2.5
4/20 22:20	76.6	↑2.4
4/20 22:30	79.1	↑2.5
4/20 22:40	81.4	↑2.3
4/20 22:50	83.7	↑2.3
4/20 23:00	85.9	↑2.2
4/20 23:10	87.9	↑2.0
4/20 23:20	89.9	↑2.0
4/20 23:30	91.7	↑1.8
4/20 23:40	93.3	↑1.6
4/20 23:50	94.8	↑1.5