20 (月)	03:24	10:13	16:45	22:08
	139cm	5cm	129cm	63cm
大潮 出 04:47 入 18:21 出 05:47 入 20:01 潮干狩り ◎ 08:13～12:25

苫小牧（北海道）2015年04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
4/20 00:00	81.3	↑3.1
4/20 00:10	84.5	↑3.2
4/20 00:20	87.9	↑3.4
4/20 00:30	91.5	↑3.6
4/20 00:40	95.2	↑3.7
4/20 00:50	99.0	↑3.8
4/20 01:00	102.9	↑3.9
4/20 01:10	106.8	↑3.9
4/20 01:20	110.7	↑3.9
4/20 01:30	114.5	↑3.8
4/20 01:40	118.2	↑3.7
4/20 01:50	121.6	↑3.4
4/20 02:00	124.9	↑3.3
4/20 02:10	127.9	↑3.0
4/20 02:20	130.6	↑2.7
4/20 02:30	132.9	↑2.3
4/20 02:40	134.9	↑2.0
4/20 02:50	136.4	↑1.5
4/20 03:00	137.6	↑1.2
4/20 03:10	138.3	↑0.7
4/20 03:20	138.7	↑0.4	満潮
4/20 03:30	138.6	↓-0.1
4/20 03:40	138.1	↓-0.5
4/20 03:50	137.3	↓-0.8
4/20 04:00	136.2	↓-1.1
4/20 04:10	134.7	↓-1.5
4/20 04:20	132.9	↓-1.8
4/20 04:30	130.8	↓-2.1
4/20 04:40	128.5	↓-2.3
4/20 04:50	126.0	↓-2.5
4/20 05:00	123.1	↓-2.9
4/20 05:10	120.1	↓-3.0
4/20 05:20	116.8	↓-3.3
4/20 05:30	113.3	↓-3.5
4/20 05:40	109.6	↓-3.7
4/20 05:50	105.7	↓-3.9
4/20 06:00	101.5	↓-4.2
4/20 06:10	97.1	↓-4.4
4/20 06:20	92.5	↓-4.6
4/20 06:30	87.7	↓-4.8
4/20 06:40	82.7	↓-5.0
4/20 06:50	77.5	↓-5.2
4/20 07:00	72.2	↓-5.3
4/20 07:10	66.8	↓-5.4
4/20 07:20	61.4	↓-5.4
4/20 07:30	55.9	↓-5.5	最大潮位差
4/20 07:40	50.6	↓-5.3
4/20 07:50	45.3	↓-5.3
4/20 08:00	40.1	↓-5.2
4/20 08:10	35.2	↓-4.9
4/20 08:20	30.6	↓-4.6
4/20 08:30	26.3	↓-4.3
4/20 08:40	22.3	↓-4.0
4/20 08:50	18.6	↓-3.7
4/20 09:00	15.4	↓-3.2
4/20 09:10	12.7	↓-2.7
4/20 09:20	10.3	↓-2.4
4/20 09:30	8.4	↓-1.9
4/20 09:40	6.9	↓-1.5
4/20 09:50	5.8	↓-1.1
4/20 10:00	5.2	↓-0.6
4/20 10:10	4.9	↓-0.3	干潮
4/20 10:20	5.1	↑0.2
4/20 10:30	5.6	↑0.5
4/20 10:40	6.4	↑0.8
4/20 10:50	7.5	↑1.1
4/20 11:00	9.0	↑1.5
4/20 11:10	10.8	↑1.8
4/20 11:20	13.0	↑2.2
4/20 11:30	15.4	↑2.4
4/20 11:40	18.1	↑2.7
4/20 11:50	21.1	↑3.0
4/20 12:00	24.5	↑3.4
4/20 12:10	28.1	↑3.6
4/20 12:20	32.1	↑4.0
4/20 12:30	36.3	↑4.2
4/20 12:40	40.8	↑4.5
4/20 12:50	45.6	↑4.8
4/20 13:00	50.6	↑5.0
4/20 13:10	55.8	↑5.2
4/20 13:20	61.1	↑5.3
4/20 13:30	66.5	↑5.4
4/20 13:40	72.0	↑5.5	最大潮位差
4/20 13:50	77.4	↑5.4
4/20 14:00	82.8	↑5.4
4/20 14:10	88.1	↑5.3
4/20 14:20	93.2	↑5.1
4/20 14:30	98.1	↑4.9
4/20 14:40	102.6	↑4.5
4/20 14:50	106.9	↑4.3
4/20 15:00	110.8	↑3.9
4/20 15:10	114.3	↑3.5
4/20 15:20	117.5	↑3.2
4/20 15:30	120.2	↑2.7
4/20 15:40	122.5	↑2.3
4/20 15:50	124.5	↑2.0
4/20 16:00	126.0	↑1.5
4/20 16:10	127.2	↑1.2
4/20 16:20	128.1	↑0.9
4/20 16:30	128.7	↑0.6
4/20 16:40	128.9	↑0.2	満潮
4/20 16:50	128.9	0
4/20 17:00	128.6	↓-0.3
4/20 17:10	128.1	↓-0.5
4/20 17:20	127.4	↓-0.7
4/20 17:30	126.4	↓-1.0
4/20 17:40	125.2	↓-1.2
4/20 17:50	123.8	↓-1.4
4/20 18:00	122.2	↓-1.6
4/20 18:10	120.3	↓-1.9
4/20 18:20	118.2	↓-2.1
4/20 18:30	115.9	↓-2.3
4/20 18:40	113.4	↓-2.5
4/20 18:50	110.7	↓-2.7
4/20 19:00	107.7	↓-3.0
4/20 19:10	104.6	↓-3.1
4/20 19:20	101.4	↓-3.2
4/20 19:30	98.0	↓-3.4
4/20 19:40	94.6	↓-3.4
4/20 19:50	91.1	↓-3.5
4/20 20:00	87.7	↓-3.4
4/20 20:10	84.3	↓-3.4
4/20 20:20	81.0	↓-3.3
4/20 20:30	77.9	↓-3.1
4/20 20:40	75.0	↓-2.9
4/20 20:50	72.4	↓-2.6
4/20 21:00	70.0	↓-2.4
4/20 21:10	67.9	↓-2.1
4/20 21:20	66.2	↓-1.7
4/20 21:30	64.8	↓-1.4
4/20 21:40	63.7	↓-1.1
4/20 21:50	63.0	↓-0.7
4/20 22:00	62.6	↓-0.4	干潮
4/20 22:10	62.6	0
4/20 22:20	62.8	↑0.2
4/20 22:30	63.3	↑0.5
4/20 22:40	64.1	↑0.8
4/20 22:50	65.1	↑1.0
4/20 23:00	66.3	↑1.2
4/20 23:10	67.7	↑1.4
4/20 23:20	69.3	↑1.6
4/20 23:30	71.1	↑1.8
4/20 23:40	73.0	↑1.9
4/20 23:50	75.1	↑2.1