20 (金)	10:43	02:58	20:05	14:02
	106cm	47cm	119cm	100cm
小潮 出 05:24 入 17:39 出 23:02 入 12:52

那珂湊（茨城）2030年09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
9/20 00:00	71.1	↓-2.6	最大潮位差
9/20 00:10	68.6	↓-2.5
9/20 00:20	66.1	↓-2.5
9/20 00:30	63.8	↓-2.3
9/20 00:40	61.6	↓-2.2
9/20 00:50	59.4	↓-2.2
9/20 01:00	57.5	↓-1.9
9/20 01:10	55.6	↓-1.9
9/20 01:20	54.0	↓-1.6
9/20 01:30	52.4	↓-1.6
9/20 01:40	51.1	↓-1.3
9/20 01:50	49.9	↓-1.2
9/20 02:00	48.8	↓-1.1
9/20 02:10	47.9	↓-0.9
9/20 02:20	47.2	↓-0.7
9/20 02:30	46.7	↓-0.5
9/20 02:40	46.4	↓-0.3
9/20 02:50	46.2	↓-0.2	干潮
9/20 03:00	46.1	↓-0.1
9/20 03:10	46.2	↑0.1
9/20 03:20	46.5	↑0.3
9/20 03:30	46.9	↑0.4
9/20 03:40	47.5	↑0.6
9/20 03:50	48.2	↑0.7
9/20 04:00	49.0	↑0.8
9/20 04:10	50.0	↑1.0
9/20 04:20	51.1	↑1.1
9/20 04:30	52.3	↑1.2
9/20 04:40	53.6	↑1.3
9/20 04:50	55.0	↑1.4
9/20 05:00	56.5	↑1.5
9/20 05:10	58.1	↑1.6
9/20 05:20	59.8	↑1.7
9/20 05:30	61.6	↑1.8
9/20 05:40	63.4	↑1.8
9/20 05:50	65.2	↑1.8
9/20 06:00	67.2	↑2.0
9/20 06:10	69.1	↑1.9
9/20 06:20	71.1	↑2.0
9/20 06:30	73.1	↑2.0
9/20 06:40	75.2	↑2.1
9/20 06:50	77.2	↑2.0
9/20 07:00	79.2	↑2.0
9/20 07:10	81.2	↑2.0
9/20 07:20	83.2	↑2.0
9/20 07:30	85.2	↑2.0
9/20 07:40	87.1	↑1.9
9/20 07:50	88.9	↑1.8
9/20 08:00	90.7	↑1.8
9/20 08:10	92.3	↑1.6
9/20 08:20	94.0	↑1.7
9/20 08:30	95.5	↑1.5
9/20 08:40	96.9	↑1.4
9/20 08:50	98.2	↑1.3
9/20 09:00	99.4	↑1.2
9/20 09:10	100.5	↑1.1
9/20 09:20	101.5	↑1.0
9/20 09:30	102.3	↑0.8
9/20 09:40	103.0	↑0.7
9/20 09:50	103.6	↑0.6
9/20 10:00	104.1	↑0.5
9/20 10:10	104.5	↑0.4
9/20 10:20	104.8	↑0.3
9/20 10:30	104.9	↑0.1
9/20 10:40	105.0	↑0.1	満潮
9/20 10:50	105.0	0
9/20 11:00	104.9	↓-0.1
9/20 11:10	104.7	↓-0.2
9/20 11:20	104.5	↓-0.2
9/20 11:30	104.2	↓-0.3
9/20 11:40	103.8	↓-0.4
9/20 11:50	103.4	↓-0.4
9/20 12:00	103.0	↓-0.4
9/20 12:10	102.6	↓-0.4
9/20 12:20	102.2	↓-0.4
9/20 12:30	101.8	↓-0.4
9/20 12:40	101.4	↓-0.4
9/20 12:50	101.1	↓-0.3
9/20 13:00	100.7	↓-0.4
9/20 13:10	100.4	↓-0.3
9/20 13:20	100.2	↓-0.2
9/20 13:30	100.0	↓-0.2
9/20 13:40	99.8	↓-0.2
9/20 13:50	99.7	↓-0.1
9/20 14:00	99.7	0	干潮
9/20 14:10	99.7	0
9/20 14:20	99.8	↑0.1
9/20 14:30	99.9	↑0.1
9/20 14:40	100.1	↑0.2
9/20 14:50	100.4	↑0.3
9/20 15:00	100.7	↑0.3
9/20 15:10	101.1	↑0.4
9/20 15:20	101.6	↑0.5
9/20 15:30	102.0	↑0.4
9/20 15:40	102.6	↑0.6
9/20 15:50	103.1	↑0.5
9/20 16:00	103.8	↑0.7
9/20 16:10	104.4	↑0.6
9/20 16:20	105.1	↑0.7
9/20 16:30	105.8	↑0.7
9/20 16:40	106.5	↑0.7
9/20 16:50	107.3	↑0.8
9/20 17:00	108.0	↑0.7
9/20 17:10	108.8	↑0.8
9/20 17:20	109.6	↑0.8
9/20 17:30	110.3	↑0.7
9/20 17:40	111.1	↑0.8
9/20 17:50	111.9	↑0.8
9/20 18:00	112.6	↑0.7
9/20 18:10	113.3	↑0.7
9/20 18:20	114.0	↑0.7
9/20 18:30	114.7	↑0.7
9/20 18:40	115.3	↑0.6
9/20 18:50	115.9	↑0.6
9/20 19:00	116.5	↑0.6
9/20 19:10	116.9	↑0.4
9/20 19:20	117.4	↑0.5
9/20 19:30	117.7	↑0.3
9/20 19:40	118.0	↑0.3
9/20 19:50	118.1	↑0.1
9/20 20:00	118.2	↑0.1	満潮
9/20 20:10	118.2	0
9/20 20:20	118.1	↓-0.1
9/20 20:30	117.9	↓-0.2
9/20 20:40	117.5	↓-0.4
9/20 20:50	117.0	↓-0.5
9/20 21:00	116.4	↓-0.6
9/20 21:10	115.7	↓-0.7
9/20 21:20	114.8	↓-0.9
9/20 21:30	113.8	↓-1.0
9/20 21:40	112.7	↓-1.1
9/20 21:50	111.5	↓-1.2
9/20 22:00	110.1	↓-1.4
9/20 22:10	108.5	↓-1.6
9/20 22:20	106.9	↓-1.6
9/20 22:30	105.1	↓-1.8
9/20 22:40	103.3	↓-1.8
9/20 22:50	101.3	↓-2.0
9/20 23:00	99.2	↓-2.1
9/20 23:10	97.1	↓-2.1
9/20 23:20	94.9	↓-2.2
9/20 23:30	92.6	↓-2.3
9/20 23:40	90.3	↓-2.3
9/20 23:50	87.9	↓-2.4