20 (日)	04:38	10:30	16:30	22:52
	133cm	45cm	143cm	27cm
中潮 出 06:25 入 17:12 出 19:51 入 06:54

苫小牧（北海道）2011年02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
2/20 00:00	32.2	↑3.1
2/20 00:10	35.5	↑3.3
2/20 00:20	39.2	↑3.7
2/20 00:30	43.1	↑3.9
2/20 00:40	47.3	↑4.2
2/20 00:50	51.7	↑4.4
2/20 01:00	56.4	↑4.7
2/20 01:10	61.3	↑4.9
2/20 01:20	66.3	↑5.0
2/20 01:30	71.4	↑5.1
2/20 01:40	76.7	↑5.3	最大潮位差
2/20 01:50	81.9	↑5.2
2/20 02:00	87.2	↑5.3	最大潮位差
2/20 02:10	92.3	↑5.1
2/20 02:20	97.3	↑5.0
2/20 02:30	102.2	↑4.9
2/20 02:40	106.7	↑4.5
2/20 02:50	111.0	↑4.3
2/20 03:00	115.0	↑4.0
2/20 03:10	118.5	↑3.5
2/20 03:20	121.7	↑3.2
2/20 03:30	124.5	↑2.8
2/20 03:40	126.9	↑2.4
2/20 03:50	128.9	↑2.0
2/20 04:00	130.4	↑1.5
2/20 04:10	131.6	↑1.2
2/20 04:20	132.4	↑0.8
2/20 04:30	132.8	↑0.4	満潮
2/20 04:40	132.9	↑0.1
2/20 04:50	132.7	↓-0.2
2/20 05:00	132.1	↓-0.6
2/20 05:10	131.3	↓-0.8
2/20 05:20	130.2	↓-1.1
2/20 05:30	128.9	↓-1.3
2/20 05:40	127.3	↓-1.6
2/20 05:50	125.4	↓-1.9
2/20 06:00	123.3	↓-2.1
2/20 06:10	121.0	↓-2.3
2/20 06:20	118.5	↓-2.5
2/20 06:30	115.7	↓-2.8
2/20 06:40	112.6	↓-3.1
2/20 06:50	109.4	↓-3.2
2/20 07:00	105.9	↓-3.5
2/20 07:10	102.3	↓-3.6
2/20 07:20	98.4	↓-3.9
2/20 07:30	94.4	↓-4.0
2/20 07:40	90.3	↓-4.1
2/20 07:50	86.2	↓-4.1
2/20 08:00	82.0	↓-4.2
2/20 08:10	77.8	↓-4.2
2/20 08:20	73.7	↓-4.1
2/20 08:30	69.8	↓-3.9
2/20 08:40	66.0	↓-3.8
2/20 08:50	62.4	↓-3.6
2/20 09:00	59.0	↓-3.4
2/20 09:10	56.0	↓-3.0
2/20 09:20	53.3	↓-2.7
2/20 09:30	51.0	↓-2.3
2/20 09:40	49.0	↓-2.0
2/20 09:50	47.4	↓-1.6
2/20 10:00	46.2	↓-1.2
2/20 10:10	45.3	↓-0.9
2/20 10:20	44.8	↓-0.5	干潮
2/20 10:30	44.7	↓-0.1	干潮
2/20 10:40	44.9	↑0.2
2/20 10:50	45.4	↑0.5
2/20 11:00	46.2	↑0.8
2/20 11:10	47.2	↑1.0
2/20 11:20	48.6	↑1.4
2/20 11:30	50.2	↑1.6
2/20 11:40	52.0	↑1.8
2/20 11:50	54.1	↑2.1
2/20 12:00	56.4	↑2.3
2/20 12:10	59.0	↑2.6
2/20 12:20	61.8	↑2.8
2/20 12:30	64.8	↑3.0
2/20 12:40	68.1	↑3.3
2/20 12:50	71.5	↑3.4
2/20 13:00	75.3	↑3.8
2/20 13:10	79.2	↑3.9
2/20 13:20	83.2	↑4.0
2/20 13:30	87.5	↑4.3
2/20 13:40	91.9	↑4.4
2/20 13:50	96.3	↑4.4
2/20 14:00	100.8	↑4.5
2/20 14:10	105.3	↑4.5
2/20 14:20	109.8	↑4.5
2/20 14:30	114.1	↑4.3
2/20 14:40	118.3	↑4.2
2/20 14:50	122.3	↑4.0
2/20 15:00	125.9	↑3.6
2/20 15:10	129.3	↑3.4
2/20 15:20	132.4	↑3.1
2/20 15:30	135.0	↑2.6
2/20 15:40	137.3	↑2.3
2/20 15:50	139.1	↑1.8
2/20 16:00	140.5	↑1.4
2/20 16:10	141.4	↑0.9
2/20 16:20	142.0	↑0.6	満潮
2/20 16:30	142.1	↑0.1	満潮
2/20 16:40	141.9	↓-0.2
2/20 16:50	141.3	↓-0.6
2/20 17:00	140.3	↓-1.0
2/20 17:10	139.0	↓-1.3
2/20 17:20	137.5	↓-1.5
2/20 17:30	135.6	↓-1.9
2/20 17:40	133.5	↓-2.1
2/20 17:50	131.1	↓-2.4
2/20 18:00	128.4	↓-2.7
2/20 18:10	125.6	↓-2.8
2/20 18:20	122.5	↓-3.1
2/20 18:30	119.2	↓-3.3
2/20 18:40	115.6	↓-3.6
2/20 18:50	111.9	↓-3.7
2/20 19:00	107.9	↓-4.0
2/20 19:10	103.7	↓-4.2
2/20 19:20	99.3	↓-4.4
2/20 19:30	94.7	↓-4.6
2/20 19:40	90.0	↓-4.7
2/20 19:50	85.2	↓-4.8
2/20 20:00	80.3	↓-4.9
2/20 20:10	75.3	↓-5.0
2/20 20:20	70.4	↓-4.9
2/20 20:30	65.5	↓-4.9
2/20 20:40	60.7	↓-4.8
2/20 20:50	56.1	↓-4.6
2/20 21:00	51.6	↓-4.5
2/20 21:10	47.5	↓-4.1
2/20 21:20	43.6	↓-3.9
2/20 21:30	40.1	↓-3.5
2/20 21:40	36.9	↓-3.2
2/20 21:50	34.2	↓-2.7
2/20 22:00	31.8	↓-2.4
2/20 22:10	29.9	↓-1.9
2/20 22:20	28.5	↓-1.4
2/20 22:30	27.4	↓-1.1
2/20 22:40	26.7	↓-0.7
2/20 22:50	26.5	↓-0.2	干潮
2/20 23:00	26.6	↑0.1
2/20 23:10	27.1	↑0.5
2/20 23:20	28.0	↑0.9
2/20 23:30	29.2	↑1.2
2/20 23:40	30.6	↑1.4
2/20 23:50	32.4	↑1.8