20 (金)	06:01	00:40	21:53	13:52
	106cm	81cm	93cm	10cm
小潮 出 04:59 入 18:17 出 09:11 入 23:58 潮干狩り ◎ 11:33～16:23

那珂湊（茨城）2029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	81.6	↓-0.5
4/20 00:10	81.2	↓-0.4
4/20 00:20	80.9	↓-0.3
4/20 00:30	80.8	↓-0.1	干潮
4/20 00:40	80.7	↓-0.1	干潮
4/20 00:50	80.8	↑0.1
4/20 01:00	81.0	↑0.2
4/20 01:10	81.3	↑0.3
4/20 01:20	81.7	↑0.4
4/20 01:30	82.2	↑0.5
4/20 01:40	82.8	↑0.6
4/20 01:50	83.5	↑0.7
4/20 02:00	84.3	↑0.8
4/20 02:10	85.2	↑0.9
4/20 02:20	86.2	↑1.0
4/20 02:30	87.2	↑1.0
4/20 02:40	88.2	↑1.0
4/20 02:50	89.3	↑1.1
4/20 03:00	90.5	↑1.2
4/20 03:10	91.6	↑1.1
4/20 03:20	92.8	↑1.2
4/20 03:30	94.0	↑1.2
4/20 03:40	95.1	↑1.1
4/20 03:50	96.3	↑1.2
4/20 04:00	97.4	↑1.1
4/20 04:10	98.5	↑1.1
4/20 04:20	99.5	↑1.0
4/20 04:30	100.4	↑0.9
4/20 04:40	101.3	↑0.9
4/20 04:50	102.2	↑0.9
4/20 05:00	102.9	↑0.7
4/20 05:10	103.5	↑0.6
4/20 05:20	104.1	↑0.6
4/20 05:30	104.5	↑0.4
4/20 05:40	104.8	↑0.3
4/20 05:50	105.0	↑0.2
4/20 06:00	105.1	↑0.1	満潮
4/20 06:10	105.0	↓-0.1
4/20 06:20	104.8	↓-0.2
4/20 06:30	104.4	↓-0.4
4/20 06:40	103.9	↓-0.5
4/20 06:50	103.2	↓-0.7
4/20 07:00	102.4	↓-0.8
4/20 07:10	101.4	↓-1.0
4/20 07:20	100.2	↓-1.2
4/20 07:30	98.8	↓-1.4
4/20 07:40	97.3	↓-1.5
4/20 07:50	95.6	↓-1.7
4/20 08:00	93.7	↓-1.9
4/20 08:10	91.6	↓-2.1
4/20 08:20	89.4	↓-2.2
4/20 08:30	87.1	↓-2.3
4/20 08:40	84.5	↓-2.6
4/20 08:50	81.9	↓-2.6
4/20 09:00	79.1	↓-2.8
4/20 09:10	76.2	↓-2.9
4/20 09:20	73.1	↓-3.1
4/20 09:30	70.0	↓-3.1
4/20 09:40	66.8	↓-3.2
4/20 09:50	63.6	↓-3.2
4/20 10:00	60.2	↓-3.4	最大潮位差
4/20 10:10	56.9	↓-3.3
4/20 10:20	53.6	↓-3.3
4/20 10:30	50.2	↓-3.4	最大潮位差
4/20 10:40	46.9	↓-3.3
4/20 10:50	43.6	↓-3.3
4/20 11:00	40.4	↓-3.2
4/20 11:10	37.3	↓-3.1
4/20 11:20	34.3	↓-3.0
4/20 11:30	31.4	↓-2.9
4/20 11:40	28.6	↓-2.8
4/20 11:50	26.0	↓-2.6
4/20 12:00	23.5	↓-2.5
4/20 12:10	21.2	↓-2.3
4/20 12:20	19.1	↓-2.1
4/20 12:30	17.2	↓-1.9
4/20 12:40	15.6	↓-1.6
4/20 12:50	14.1	↓-1.5
4/20 13:00	12.8	↓-1.3
4/20 13:10	11.8	↓-1.0
4/20 13:20	11.0	↓-0.8
4/20 13:30	10.4	↓-0.6
4/20 13:40	10.0	↓-0.4
4/20 13:50	9.9	↓-0.1	干潮
4/20 14:00	10.0	↑0.1
4/20 14:10	10.3	↑0.3
4/20 14:20	10.8	↑0.5
4/20 14:30	11.5	↑0.7
4/20 14:40	12.4	↑0.9
4/20 14:50	13.4	↑1.0
4/20 15:00	14.7	↑1.3
4/20 15:10	16.1	↑1.4
4/20 15:20	17.7	↑1.6
4/20 15:30	19.5	↑1.8
4/20 15:40	21.3	↑1.8
4/20 15:50	23.4	↑2.1
4/20 16:00	25.5	↑2.1
4/20 16:10	27.7	↑2.2
4/20 16:20	30.1	↑2.4
4/20 16:30	32.5	↑2.4
4/20 16:40	35.0	↑2.5
4/20 16:50	37.5	↑2.5
4/20 17:00	40.1	↑2.6
4/20 17:10	42.8	↑2.7
4/20 17:20	45.5	↑2.7
4/20 17:30	48.2	↑2.7
4/20 17:40	50.9	↑2.7
4/20 17:50	53.6	↑2.7
4/20 18:00	56.3	↑2.7
4/20 18:10	59.0	↑2.7
4/20 18:20	61.6	↑2.6
4/20 18:30	64.2	↑2.6
4/20 18:40	66.7	↑2.5
4/20 18:50	69.2	↑2.5
4/20 19:00	71.6	↑2.4
4/20 19:10	73.8	↑2.2
4/20 19:20	76.0	↑2.2
4/20 19:30	78.1	↑2.1
4/20 19:40	80.0	↑1.9
4/20 19:50	81.9	↑1.9
4/20 20:00	83.6	↑1.7
4/20 20:10	85.1	↑1.5
4/20 20:20	86.5	↑1.4
4/20 20:30	87.8	↑1.3
4/20 20:40	88.9	↑1.1
4/20 20:50	89.8	↑0.9
4/20 21:00	90.6	↑0.8
4/20 21:10	91.3	↑0.7
4/20 21:20	91.8	↑0.5
4/20 21:30	92.1	↑0.3
4/20 21:40	92.4	↑0.3
4/20 21:50	92.4	0	満潮
4/20 22:00	92.4	0
4/20 22:10	92.3	↓-0.1
4/20 22:20	92.0	↓-0.3
4/20 22:30	91.7	↓-0.3
4/20 22:40	91.3	↓-0.4
4/20 22:50	90.8	↓-0.5
4/20 23:00	90.2	↓-0.6
4/20 23:10	89.6	↓-0.6
4/20 23:20	89.0	↓-0.6
4/20 23:30	88.4	↓-0.6
4/20 23:40	87.7	↓-0.7
4/20 23:50	87.1	↓-0.6