31 (日)	10:59	04:15	-	17:56
	113cm	56cm	-	49cm
長潮 出 06:49 入 16:34 出 00:37 入 12:30

那珂湊（茨城）2056年12月31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
12/31 00:00	86.0	↓-1.3
12/31 00:10	84.7	↓-1.3
12/31 00:20	83.2	↓-1.5
12/31 00:30	81.7	↓-1.5
12/31 00:40	80.1	↓-1.6
12/31 00:50	78.5	↓-1.6
12/31 01:00	76.8	↓-1.7
12/31 01:10	75.1	↓-1.7
12/31 01:20	73.5	↓-1.6
12/31 01:30	71.8	↓-1.7
12/31 01:40	70.2	↓-1.6
12/31 01:50	68.6	↓-1.6
12/31 02:00	67.0	↓-1.6
12/31 02:10	65.5	↓-1.5
12/31 02:20	64.1	↓-1.4
12/31 02:30	62.8	↓-1.3
12/31 02:40	61.5	↓-1.3
12/31 02:50	60.4	↓-1.1
12/31 03:00	59.3	↓-1.1
12/31 03:10	58.4	↓-0.9
12/31 03:20	57.6	↓-0.8
12/31 03:30	56.9	↓-0.7
12/31 03:40	56.3	↓-0.6
12/31 03:50	55.9	↓-0.4
12/31 04:00	55.7	↓-0.2
12/31 04:10	55.5	↓-0.2	干潮
12/31 04:20	55.6	↑0.1
12/31 04:30	55.7	↑0.1
12/31 04:40	56.0	↑0.3
12/31 04:50	56.5	↑0.5
12/31 05:00	57.1	↑0.6
12/31 05:10	57.8	↑0.7
12/31 05:20	58.7	↑0.9
12/31 05:30	59.7	↑1.0
12/31 05:40	60.9	↑1.2
12/31 05:50	62.2	↑1.3
12/31 06:00	63.6	↑1.4
12/31 06:10	65.2	↑1.6
12/31 06:20	66.8	↑1.6
12/31 06:30	68.6	↑1.8
12/31 06:40	70.5	↑1.9
12/31 06:50	72.4	↑1.9
12/31 07:00	74.4	↑2.0
12/31 07:10	76.5	↑2.1
12/31 07:20	78.7	↑2.2
12/31 07:30	80.9	↑2.2
12/31 07:40	83.1	↑2.2
12/31 07:50	85.3	↑2.2
12/31 08:00	87.6	↑2.3
12/31 08:10	89.8	↑2.2
12/31 08:20	92.0	↑2.2
12/31 08:30	94.2	↑2.2
12/31 08:40	96.3	↑2.1
12/31 08:50	98.3	↑2.0
12/31 09:00	100.3	↑2.0
12/31 09:10	102.2	↑1.9
12/31 09:20	103.9	↑1.7
12/31 09:30	105.5	↑1.6
12/31 09:40	107.0	↑1.5
12/31 09:50	108.3	↑1.3
12/31 10:00	109.5	↑1.2
12/31 10:10	110.5	↑1.0
12/31 10:20	111.3	↑0.8
12/31 10:30	111.9	↑0.6
12/31 10:40	112.4	↑0.5
12/31 10:50	112.6	↑0.2	満潮
12/31 11:00	112.7	↑0.1
12/31 11:10	112.5	↓-0.2
12/31 11:20	112.2	↓-0.3
12/31 11:30	111.7	↓-0.5
12/31 11:40	110.9	↓-0.8
12/31 11:50	110.0	↓-0.9
12/31 12:00	108.9	↓-1.1
12/31 12:10	107.6	↓-1.3
12/31 12:20	106.2	↓-1.4
12/31 12:30	104.6	↓-1.6
12/31 12:40	102.9	↓-1.7
12/31 12:50	101.0	↓-1.9
12/31 13:00	99.0	↓-2.0
12/31 13:10	97.0	↓-2.0
12/31 13:20	94.8	↓-2.2
12/31 13:30	92.5	↓-2.3
12/31 13:40	90.2	↓-2.3
12/31 13:50	87.8	↓-2.4
12/31 14:00	85.4	↓-2.4
12/31 14:10	83.0	↓-2.4
12/31 14:20	80.6	↓-2.4
12/31 14:30	78.2	↓-2.4
12/31 14:40	75.7	↓-2.5	最大潮位差
12/31 14:50	73.4	↓-2.3
12/31 15:00	71.0	↓-2.4
12/31 15:10	68.8	↓-2.2
12/31 15:20	66.6	↓-2.2
12/31 15:30	64.5	↓-2.1
12/31 15:40	62.4	↓-2.1
12/31 15:50	60.5	↓-1.9
12/31 16:00	58.7	↓-1.8
12/31 16:10	57.0	↓-1.7
12/31 16:20	55.4	↓-1.6
12/31 16:30	54.0	↓-1.4
12/31 16:40	52.7	↓-1.3
12/31 16:50	51.6	↓-1.1
12/31 17:00	50.6	↓-1.0
12/31 17:10	49.8	↓-0.8
12/31 17:20	49.1	↓-0.7
12/31 17:30	48.6	↓-0.5
12/31 17:40	48.3	↓-0.3
12/31 17:50	48.1	↓-0.2	干潮
12/31 18:00	48.1	0
12/31 18:10	48.3	↑0.2
12/31 18:20	48.6	↑0.3
12/31 18:30	49.1	↑0.5
12/31 18:40	49.8	↑0.7
12/31 18:50	50.6	↑0.8
12/31 19:00	51.5	↑0.9
12/31 19:10	52.7	↑1.2
12/31 19:20	53.9	↑1.2
12/31 19:30	55.3	↑1.4
12/31 19:40	56.8	↑1.5
12/31 19:50	58.4	↑1.6
12/31 20:00	60.1	↑1.7
12/31 20:10	61.9	↑1.8
12/31 20:20	63.7	↑1.8
12/31 20:30	65.6	↑1.9
12/31 20:40	67.6	↑2.0
12/31 20:50	69.5	↑1.9
12/31 21:00	71.5	↑2.0
12/31 21:10	73.5	↑2.0
12/31 21:20	75.5	↑2.0
12/31 21:30	77.4	↑1.9
12/31 21:40	79.3	↑1.9
12/31 21:50	81.2	↑1.9
12/31 22:00	82.9	↑1.7
12/31 22:10	84.6	↑1.7
12/31 22:20	86.2	↑1.6
12/31 22:30	87.6	↑1.4
12/31 22:40	89.0	↑1.4
12/31 22:50	90.2	↑1.2
12/31 23:00	91.3	↑1.1
12/31 23:10	92.2	↑0.9
12/31 23:20	93.0	↑0.8
12/31 23:30	93.7	↑0.7
12/31 23:40	94.2	↑0.5
12/31 23:50	94.5	↑0.3