31 (月)	07:22	01:25	-	15:46
	105cm	80cm	-	35cm
小潮 出 05:27 入 17:59 出 10:52 入 00:33

日立（茨城）2031年03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
3/31 00:00	81.0	↓-0.4
3/31 00:10	80.7	↓-0.3
3/31 00:20	80.3	↓-0.4
3/31 00:30	80.0	↓-0.3
3/31 00:40	79.8	↓-0.2
3/31 00:50	79.6	↓-0.2
3/31 01:00	79.4	↓-0.2
3/31 01:10	79.3	↓-0.1
3/31 01:20	79.3	0	干潮
3/31 01:30	79.3	0
3/31 01:40	79.3	0
3/31 01:50	79.5	↑0.2
3/31 02:00	79.7	↑0.2
3/31 02:10	80.0	↑0.3
3/31 02:20	80.3	↑0.3
3/31 02:30	80.7	↑0.4
3/31 02:40	81.2	↑0.5
3/31 02:50	81.8	↑0.6
3/31 03:00	82.5	↑0.7
3/31 03:10	83.2	↑0.7
3/31 03:20	84.0	↑0.8
3/31 03:30	84.9	↑0.9
3/31 03:40	85.8	↑0.9
3/31 03:50	86.8	↑1.0
3/31 04:00	87.9	↑1.1
3/31 04:10	88.9	↑1.0
3/31 04:20	90.1	↑1.2
3/31 04:30	91.2	↑1.1
3/31 04:40	92.3	↑1.1
3/31 04:50	93.5	↑1.2
3/31 05:00	94.6	↑1.1
3/31 05:10	95.8	↑1.2
3/31 05:20	96.9	↑1.1
3/31 05:30	97.9	↑1.0
3/31 05:40	98.9	↑1.0
3/31 05:50	99.8	↑0.9
3/31 06:00	100.7	↑0.9
3/31 06:10	101.5	↑0.8
3/31 06:20	102.2	↑0.7
3/31 06:30	102.8	↑0.6
3/31 06:40	103.3	↑0.5
3/31 06:50	103.7	↑0.4
3/31 07:00	104.0	↑0.3
3/31 07:10	104.2	↑0.2
3/31 07:20	104.2	0	満潮
3/31 07:30	104.2	0
3/31 07:40	104.0	↓-0.2
3/31 07:50	103.7	↓-0.3
3/31 08:00	103.3	↓-0.4
3/31 08:10	102.8	↓-0.5
3/31 08:20	102.1	↓-0.7
3/31 08:30	101.4	↓-0.7
3/31 08:40	100.5	↓-0.9
3/31 08:50	99.5	↓-1.0
3/31 09:00	98.3	↓-1.2
3/31 09:10	97.1	↓-1.2
3/31 09:20	95.7	↓-1.4
3/31 09:30	94.2	↓-1.5
3/31 09:40	92.7	↓-1.5
3/31 09:50	91.0	↓-1.7
3/31 10:00	89.2	↓-1.8
3/31 10:10	87.4	↓-1.8
3/31 10:20	85.5	↓-1.9
3/31 10:30	83.5	↓-2.0
3/31 10:40	81.4	↓-2.1
3/31 10:50	79.4	↓-2.0
3/31 11:00	77.2	↓-2.2	最大潮位差
3/31 11:10	75.1	↓-2.1
3/31 11:20	72.9	↓-2.2	最大潮位差
3/31 11:30	70.8	↓-2.1
3/31 11:40	68.6	↓-2.2	最大潮位差
3/31 11:50	66.4	↓-2.2	最大潮位差
3/31 12:00	64.3	↓-2.1
3/31 12:10	62.2	↓-2.1
3/31 12:20	60.1	↓-2.1
3/31 12:30	58.0	↓-2.1
3/31 12:40	56.0	↓-2.0
3/31 12:50	54.1	↓-1.9
3/31 13:00	52.2	↓-1.9
3/31 13:10	50.4	↓-1.8
3/31 13:20	48.6	↓-1.8
3/31 13:30	46.9	↓-1.7
3/31 13:40	45.3	↓-1.6
3/31 13:50	43.8	↓-1.5
3/31 14:00	42.4	↓-1.4
3/31 14:10	41.1	↓-1.3
3/31 14:20	39.9	↓-1.2
3/31 14:30	38.8	↓-1.1
3/31 14:40	37.8	↓-1.0
3/31 14:50	37.0	↓-0.8
3/31 15:00	36.3	↓-0.7
3/31 15:10	35.7	↓-0.6
3/31 15:20	35.3	↓-0.4
3/31 15:30	35.0	↓-0.3
3/31 15:40	34.8	↓-0.2	干潮
3/31 15:50	34.8	0
3/31 16:00	35.0	↑0.2
3/31 16:10	35.3	↑0.3
3/31 16:20	35.7	↑0.4
3/31 16:30	36.3	↑0.6
3/31 16:40	37.0	↑0.7
3/31 16:50	37.8	↑0.8
3/31 17:00	38.7	↑0.9
3/31 17:10	39.7	↑1.0
3/31 17:20	40.9	↑1.2
3/31 17:30	42.1	↑1.2
3/31 17:40	43.4	↑1.3
3/31 17:50	44.8	↑1.4
3/31 18:00	46.3	↑1.5
3/31 18:10	47.8	↑1.5
3/31 18:20	49.3	↑1.5
3/31 18:30	50.9	↑1.6
3/31 18:40	52.5	↑1.6
3/31 18:50	54.2	↑1.7
3/31 19:00	55.8	↑1.6
3/31 19:10	57.5	↑1.7
3/31 19:20	59.2	↑1.7
3/31 19:30	60.9	↑1.7
3/31 19:40	62.5	↑1.6
3/31 19:50	64.2	↑1.7
3/31 20:00	65.8	↑1.6
3/31 20:10	67.4	↑1.6
3/31 20:20	68.9	↑1.5
3/31 20:30	70.4	↑1.5
3/31 20:40	71.8	↑1.4
3/31 20:50	73.2	↑1.4
3/31 21:00	74.5	↑1.3
3/31 21:10	75.8	↑1.3
3/31 21:20	76.9	↑1.1
3/31 21:30	78.0	↑1.1
3/31 21:40	79.0	↑1.0
3/31 21:50	79.9	↑0.9
3/31 22:00	80.8	↑0.9
3/31 22:10	81.5	↑0.7
3/31 22:20	82.2	↑0.7
3/31 22:30	82.8	↑0.6
3/31 22:40	83.4	↑0.6
3/31 22:50	83.8	↑0.4
3/31 23:00	84.2	↑0.4
3/31 23:10	84.6	↑0.4
3/31 23:20	84.8	↑0.2
3/31 23:30	85.1	↑0.3
3/31 23:40	85.3	↑0.2
3/31 23:50	85.4	↑0.1