31 (火)	08:53	01:58	20:50	15:13
	116cm	40cm	95cm	60cm
小潮 出 06:49 入 16:34 出 10:51 入 23:53

那珂湊（茨城）2030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	53.5	↓-2.3
12/31 00:10	51.4	↓-2.1
12/31 00:20	49.4	↓-2.0
12/31 00:30	47.6	↓-1.8
12/31 00:40	46.0	↓-1.6
12/31 00:50	44.5	↓-1.5
12/31 01:00	43.3	↓-1.2
12/31 01:10	42.2	↓-1.1
12/31 01:20	41.3	↓-0.9
12/31 01:30	40.6	↓-0.7
12/31 01:40	40.2	↓-0.4
12/31 01:50	39.9	↓-0.3	干潮
12/31 02:00	39.9	0
12/31 02:10	40.0	↑0.1
12/31 02:20	40.4	↑0.4
12/31 02:30	41.0	↑0.6
12/31 02:40	41.7	↑0.7
12/31 02:50	42.7	↑1.0
12/31 03:00	43.9	↑1.2
12/31 03:10	45.2	↑1.3
12/31 03:20	46.7	↑1.5
12/31 03:30	48.4	↑1.7
12/31 03:40	50.2	↑1.8
12/31 03:50	52.2	↑2.0
12/31 04:00	54.4	↑2.2
12/31 04:10	56.6	↑2.2
12/31 04:20	59.0	↑2.4
12/31 04:30	61.5	↑2.5
12/31 04:40	64.1	↑2.6
12/31 04:50	66.8	↑2.7
12/31 05:00	69.5	↑2.7
12/31 05:10	72.3	↑2.8
12/31 05:20	75.1	↑2.8
12/31 05:30	77.9	↑2.8
12/31 05:40	80.8	↑2.9	最大潮位差
12/31 05:50	83.6	↑2.8
12/31 06:00	86.5	↑2.9	最大潮位差
12/31 06:10	89.2	↑2.7
12/31 06:20	92.0	↑2.8
12/31 06:30	94.6	↑2.6
12/31 06:40	97.2	↑2.6
12/31 06:50	99.6	↑2.4
12/31 07:00	101.9	↑2.3
12/31 07:10	104.1	↑2.2
12/31 07:20	106.1	↑2.0
12/31 07:30	108.0	↑1.9
12/31 07:40	109.6	↑1.6
12/31 07:50	111.1	↑1.5
12/31 08:00	112.4	↑1.3
12/31 08:10	113.4	↑1.0
12/31 08:20	114.3	↑0.9
12/31 08:30	114.9	↑0.6
12/31 08:40	115.3	↑0.4
12/31 08:50	115.4	↑0.1	満潮
12/31 09:00	115.3	↓-0.1
12/31 09:10	115.0	↓-0.3
12/31 09:20	114.5	↓-0.5
12/31 09:30	113.8	↓-0.7
12/31 09:40	112.8	↓-1.0
12/31 09:50	111.7	↓-1.1
12/31 10:00	110.4	↓-1.3
12/31 10:10	108.9	↓-1.5
12/31 10:20	107.2	↓-1.7
12/31 10:30	105.4	↓-1.8
12/31 10:40	103.4	↓-2.0
12/31 10:50	101.4	↓-2.0
12/31 11:00	99.2	↓-2.2
12/31 11:10	97.0	↓-2.2
12/31 11:20	94.8	↓-2.2
12/31 11:30	92.4	↓-2.4
12/31 11:40	90.1	↓-2.3
12/31 11:50	87.8	↓-2.3
12/31 12:00	85.4	↓-2.4
12/31 12:10	83.1	↓-2.3
12/31 12:20	80.9	↓-2.2
12/31 12:30	78.7	↓-2.2
12/31 12:40	76.6	↓-2.1
12/31 12:50	74.6	↓-2.0
12/31 13:00	72.6	↓-2.0
12/31 13:10	70.8	↓-1.8
12/31 13:20	69.1	↓-1.7
12/31 13:30	67.6	↓-1.5
12/31 13:40	66.1	↓-1.5
12/31 13:50	64.8	↓-1.3
12/31 14:00	63.7	↓-1.1
12/31 14:10	62.7	↓-1.0
12/31 14:20	61.8	↓-0.9
12/31 14:30	61.1	↓-0.7
12/31 14:40	60.5	↓-0.6
12/31 14:50	60.1	↓-0.4
12/31 15:00	59.9	↓-0.2
12/31 15:10	59.8	↓-0.1	干潮
12/31 15:20	59.8	0
12/31 15:30	60.0	↑0.2
12/31 15:40	60.3	↑0.3
12/31 15:50	60.8	↑0.5
12/31 16:00	61.4	↑0.6
12/31 16:10	62.1	↑0.7
12/31 16:20	63.0	↑0.9
12/31 16:30	63.9	↑0.9
12/31 16:40	65.0	↑1.1
12/31 16:50	66.2	↑1.2
12/31 17:00	67.4	↑1.2
12/31 17:10	68.7	↑1.3
12/31 17:20	70.1	↑1.4
12/31 17:30	71.6	↑1.5
12/31 17:40	73.1	↑1.5
12/31 17:50	74.7	↑1.6
12/31 18:00	76.2	↑1.5
12/31 18:10	77.8	↑1.6
12/31 18:20	79.4	↑1.6
12/31 18:30	81.0	↑1.6
12/31 18:40	82.5	↑1.5
12/31 18:50	84.1	↑1.6
12/31 19:00	85.5	↑1.4
12/31 19:10	86.9	↑1.4
12/31 19:20	88.2	↑1.3
12/31 19:30	89.4	↑1.2
12/31 19:40	90.5	↑1.1
12/31 19:50	91.5	↑1.0
12/31 20:00	92.3	↑0.8
12/31 20:10	93.0	↑0.7
12/31 20:20	93.6	↑0.6
12/31 20:30	94.0	↑0.4
12/31 20:40	94.2	↑0.2	満潮
12/31 20:50	94.3	↑0.1	満潮
12/31 21:00	94.2	↓-0.1
12/31 21:10	93.9	↓-0.3
12/31 21:20	93.5	↓-0.4
12/31 21:30	92.9	↓-0.6
12/31 21:40	92.1	↓-0.8
12/31 21:50	91.2	↓-0.9
12/31 22:00	90.1	↓-1.1
12/31 22:10	88.9	↓-1.2
12/31 22:20	87.5	↓-1.4
12/31 22:30	86.1	↓-1.4
12/31 22:40	84.5	↓-1.6
12/31 22:50	82.8	↓-1.7
12/31 23:00	81.1	↓-1.7
12/31 23:10	79.3	↓-1.8
12/31 23:20	77.5	↓-1.8
12/31 23:30	75.6	↓-1.9
12/31 23:40	73.7	↓-1.9
12/31 23:50	71.8	↓-1.9