20 (月)	10:49	03:39	22:45	17:17
	113cm	44cm	96cm	66cm
長潮 出 06:45 入 16:27 出 - 入 12:24

那珂湊（茨城）2038年12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
12/20 00:00	75.1	↓-2.1
12/20 00:10	72.9	↓-2.2
12/20 00:20	70.7	↓-2.2
12/20 00:30	68.5	↓-2.2
12/20 00:40	66.3	↓-2.2
12/20 00:50	64.2	↓-2.1
12/20 01:00	62.1	↓-2.1
12/20 01:10	60.0	↓-2.1
12/20 01:20	58.1	↓-1.9
12/20 01:30	56.2	↓-1.9
12/20 01:40	54.4	↓-1.8
12/20 01:50	52.7	↓-1.7
12/20 02:00	51.1	↓-1.6
12/20 02:10	49.7	↓-1.4
12/20 02:20	48.4	↓-1.3
12/20 02:30	47.2	↓-1.2
12/20 02:40	46.2	↓-1.0
12/20 02:50	45.3	↓-0.9
12/20 03:00	44.6	↓-0.7
12/20 03:10	44.0	↓-0.6
12/20 03:20	43.7	↓-0.3
12/20 03:30	43.4	↓-0.3	干潮
12/20 03:40	43.4	0
12/20 03:50	43.5	↑0.1
12/20 04:00	43.8	↑0.3
12/20 04:10	44.2	↑0.4
12/20 04:20	44.9	↑0.7
12/20 04:30	45.6	↑0.7
12/20 04:40	46.6	↑1.0
12/20 04:50	47.7	↑1.1
12/20 05:00	48.9	↑1.2
12/20 05:10	50.3	↑1.4
12/20 05:20	51.8	↑1.5
12/20 05:30	53.5	↑1.7
12/20 05:40	55.3	↑1.8
12/20 05:50	57.2	↑1.9
12/20 06:00	59.2	↑2.0
12/20 06:10	61.4	↑2.2
12/20 06:20	63.6	↑2.2
12/20 06:30	65.9	↑2.3
12/20 06:40	68.3	↑2.4
12/20 06:50	70.7	↑2.4
12/20 07:00	73.2	↑2.5
12/20 07:10	75.7	↑2.5
12/20 07:20	78.2	↑2.5
12/20 07:30	80.8	↑2.6	最大潮位差
12/20 07:40	83.3	↑2.5
12/20 07:50	85.8	↑2.5
12/20 08:00	88.3	↑2.5
12/20 08:10	90.7	↑2.4
12/20 08:20	93.1	↑2.4
12/20 08:30	95.4	↑2.3
12/20 08:40	97.6	↑2.2
12/20 08:50	99.7	↑2.1
12/20 09:00	101.6	↑1.9
12/20 09:10	103.4	↑1.8
12/20 09:20	105.1	↑1.7
12/20 09:30	106.7	↑1.6
12/20 09:40	108.0	↑1.3
12/20 09:50	109.2	↑1.2
12/20 10:00	110.2	↑1.0
12/20 10:10	111.0	↑0.8
12/20 10:20	111.7	↑0.7
12/20 10:30	112.1	↑0.4
12/20 10:40	112.4	↑0.3	満潮
12/20 10:50	112.4	0
12/20 11:00	112.3	↓-0.1
12/20 11:10	112.0	↓-0.3
12/20 11:20	111.5	↓-0.5
12/20 11:30	110.8	↓-0.7
12/20 11:40	110.0	↓-0.8
12/20 11:50	109.0	↓-1.0
12/20 12:00	107.9	↓-1.1
12/20 12:10	106.7	↓-1.2
12/20 12:20	105.3	↓-1.4
12/20 12:30	103.8	↓-1.5
12/20 12:40	102.2	↓-1.6
12/20 12:50	100.5	↓-1.7
12/20 13:00	98.8	↓-1.7
12/20 13:10	97.0	↓-1.8
12/20 13:20	95.1	↓-1.9
12/20 13:30	93.3	↓-1.8
12/20 13:40	91.4	↓-1.9
12/20 13:50	89.5	↓-1.9
12/20 14:00	87.6	↓-1.9
12/20 14:10	85.7	↓-1.9
12/20 14:20	83.9	↓-1.8
12/20 14:30	82.1	↓-1.8
12/20 14:40	80.4	↓-1.7
12/20 14:50	78.7	↓-1.7
12/20 15:00	77.1	↓-1.6
12/20 15:10	75.6	↓-1.5
12/20 15:20	74.2	↓-1.4
12/20 15:30	72.8	↓-1.4
12/20 15:40	71.6	↓-1.2
12/20 15:50	70.5	↓-1.1
12/20 16:00	69.4	↓-1.1
12/20 16:10	68.5	↓-0.9
12/20 16:20	67.8	↓-0.7
12/20 16:30	67.1	↓-0.7
12/20 16:40	66.6	↓-0.5
12/20 16:50	66.2	↓-0.4
12/20 17:00	65.9	↓-0.3
12/20 17:10	65.8	↓-0.1	干潮
12/20 17:20	65.8	0
12/20 17:30	65.9	↑0.1
12/20 17:40	66.1	↑0.2
12/20 17:50	66.5	↑0.4
12/20 18:00	67.0	↑0.5
12/20 18:10	67.6	↑0.6
12/20 18:20	68.3	↑0.7
12/20 18:30	69.1	↑0.8
12/20 18:40	70.0	↑0.9
12/20 18:50	71.1	↑1.1
12/20 19:00	72.2	↑1.1
12/20 19:10	73.4	↑1.2
12/20 19:20	74.6	↑1.2
12/20 19:30	75.9	↑1.3
12/20 19:40	77.3	↑1.4
12/20 19:50	78.6	↑1.3
12/20 20:00	80.1	↑1.5
12/20 20:10	81.5	↑1.4
12/20 20:20	82.9	↑1.4
12/20 20:30	84.3	↑1.4
12/20 20:40	85.6	↑1.3
12/20 20:50	87.0	↑1.4
12/20 21:00	88.2	↑1.2
12/20 21:10	89.4	↑1.2
12/20 21:20	90.5	↑1.1
12/20 21:30	91.6	↑1.1
12/20 21:40	92.5	↑0.9
12/20 21:50	93.3	↑0.8
12/20 22:00	94.0	↑0.7
12/20 22:10	94.5	↑0.5
12/20 22:20	95.0	↑0.5
12/20 22:30	95.2	↑0.2
12/20 22:40	95.4	↑0.2	満潮
12/20 22:50	95.3	↓-0.1
12/20 23:00	95.2	↓-0.1
12/20 23:10	94.9	↓-0.3
12/20 23:20	94.4	↓-0.5
12/20 23:30	93.8	↓-0.6
12/20 23:40	93.0	↓-0.8
12/20 23:50	92.1	↓-0.9