20 (土)	02:32	08:24	14:08	20:36
	106cm	48cm	104cm	22cm
中潮 出 04:59 入 18:17 出 03:46 入 15:24

那珂湊（茨城）2058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	79.3	↑3.1
4/20 00:10	82.3	↑3.0
4/20 00:20	85.2	↑2.9
4/20 00:30	87.9	↑2.7
4/20 00:40	90.5	↑2.6
4/20 00:50	92.9	↑2.4
4/20 01:00	95.1	↑2.2
4/20 01:10	97.1	↑2.0
4/20 01:20	98.9	↑1.8
4/20 01:30	100.5	↑1.6
4/20 01:40	101.8	↑1.3
4/20 01:50	103.0	↑1.2
4/20 02:00	103.8	↑0.8
4/20 02:10	104.5	↑0.7
4/20 02:20	104.9	↑0.4
4/20 02:30	105.0	↑0.1	満潮
4/20 02:40	104.9	↓-0.1
4/20 02:50	104.6	↓-0.3
4/20 03:00	104.1	↓-0.5
4/20 03:10	103.3	↓-0.8
4/20 03:20	102.3	↓-1.0
4/20 03:30	101.1	↓-1.2
4/20 03:40	99.7	↓-1.4
4/20 03:50	98.1	↓-1.6
4/20 04:00	96.4	↓-1.7
4/20 04:10	94.5	↓-1.9
4/20 04:20	92.4	↓-2.1
4/20 04:30	90.3	↓-2.1
4/20 04:40	88.0	↓-2.3
4/20 04:50	85.6	↓-2.4
4/20 05:00	83.2	↓-2.4
4/20 05:10	80.7	↓-2.5
4/20 05:20	78.2	↓-2.5
4/20 05:30	75.6	↓-2.6
4/20 05:40	73.1	↓-2.5
4/20 05:50	70.6	↓-2.5
4/20 06:00	68.1	↓-2.5
4/20 06:10	65.7	↓-2.4
4/20 06:20	63.4	↓-2.3
4/20 06:30	61.2	↓-2.2
4/20 06:40	59.1	↓-2.1
4/20 06:50	57.2	↓-1.9
4/20 07:00	55.4	↓-1.8
4/20 07:10	53.8	↓-1.6
4/20 07:20	52.3	↓-1.5
4/20 07:30	51.1	↓-1.2
4/20 07:40	50.0	↓-1.1
4/20 07:50	49.2	↓-0.8
4/20 08:00	48.6	↓-0.6
4/20 08:10	48.2	↓-0.4
4/20 08:20	48.0	↓-0.2	干潮
4/20 08:30	48.0	0
4/20 08:40	48.3	↑0.3
4/20 08:50	48.8	↑0.5
4/20 09:00	49.6	↑0.8
4/20 09:10	50.5	↑0.9
4/20 09:20	51.7	↑1.2
4/20 09:30	53.0	↑1.3
4/20 09:40	54.5	↑1.5
4/20 09:50	56.3	↑1.8
4/20 10:00	58.1	↑1.8
4/20 10:10	60.1	↑2.0
4/20 10:20	62.3	↑2.2
4/20 10:30	64.5	↑2.2
4/20 10:40	66.9	↑2.4
4/20 10:50	69.3	↑2.4
4/20 11:00	71.8	↑2.5
4/20 11:10	74.3	↑2.5
4/20 11:20	76.8	↑2.5
4/20 11:30	79.4	↑2.6
4/20 11:40	81.9	↑2.5
4/20 11:50	84.3	↑2.4
4/20 12:00	86.7	↑2.4
4/20 12:10	89.0	↑2.3
4/20 12:20	91.2	↑2.2
4/20 12:30	93.2	↑2.0
4/20 12:40	95.1	↑1.9
4/20 12:50	96.9	↑1.8
4/20 13:00	98.5	↑1.6
4/20 13:10	99.9	↑1.4
4/20 13:20	101.1	↑1.2
4/20 13:30	102.0	↑0.9
4/20 13:40	102.8	↑0.8
4/20 13:50	103.3	↑0.5
4/20 14:00	103.6	↑0.3	満潮
4/20 14:10	103.7	↑0.1
4/20 14:20	103.5	↓-0.2
4/20 14:30	103.1	↓-0.4
4/20 14:40	102.4	↓-0.7
4/20 14:50	101.4	↓-1.0
4/20 15:00	100.3	↓-1.1
4/20 15:10	98.9	↓-1.4
4/20 15:20	97.2	↓-1.7
4/20 15:30	95.4	↓-1.8
4/20 15:40	93.3	↓-2.1
4/20 15:50	91.0	↓-2.3
4/20 16:00	88.6	↓-2.4
4/20 16:10	85.9	↓-2.7
4/20 16:20	83.1	↓-2.8
4/20 16:30	80.2	↓-2.9
4/20 16:40	77.1	↓-3.1
4/20 16:50	74.0	↓-3.1
4/20 17:00	70.8	↓-3.2
4/20 17:10	67.5	↓-3.3
4/20 17:20	64.1	↓-3.4
4/20 17:30	60.8	↓-3.3
4/20 17:40	57.4	↓-3.4
4/20 17:50	54.1	↓-3.3
4/20 18:00	50.8	↓-3.3
4/20 18:10	47.6	↓-3.2
4/20 18:20	44.5	↓-3.1
4/20 18:30	41.6	↓-2.9
4/20 18:40	38.7	↓-2.9
4/20 18:50	36.0	↓-2.7
4/20 19:00	33.5	↓-2.5
4/20 19:10	31.2	↓-2.3
4/20 19:20	29.1	↓-2.1
4/20 19:30	27.2	↓-1.9
4/20 19:40	25.6	↓-1.6
4/20 19:50	24.2	↓-1.4
4/20 20:00	23.1	↓-1.1
4/20 20:10	22.2	↓-0.9
4/20 20:20	21.7	↓-0.5
4/20 20:30	21.4	↓-0.3	干潮
4/20 20:40	21.4	0
4/20 20:50	21.7	↑0.3
4/20 21:00	22.3	↑0.6
4/20 21:10	23.2	↑0.9
4/20 21:20	24.3	↑1.1
4/20 21:30	25.8	↑1.5
4/20 21:40	27.4	↑1.6
4/20 21:50	29.4	↑2.0
4/20 22:00	31.5	↑2.1
4/20 22:10	33.9	↑2.4
4/20 22:20	36.5	↑2.6
4/20 22:30	39.3	↑2.8
4/20 22:40	42.3	↑3.0
4/20 22:50	45.4	↑3.1
4/20 23:00	48.6	↑3.2
4/20 23:10	51.9	↑3.3
4/20 23:20	55.4	↑3.5
4/20 23:30	58.8	↑3.4
4/20 23:40	62.4	↑3.6	最大潮位差
4/20 23:50	65.9	↑3.5