20 (水)	03:32	10:35	17:36	22:27
	146cm	-4cm	124cm	76cm
中潮 出 04:47 入 18:21 出 21:17 入 05:42 潮干狩り ◎ 08:17～13:11

苫小牧（北海道）2011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	88.7	↑2.6
4/20 00:10	91.5	↑2.8
4/20 00:20	94.4	↑2.9
4/20 00:30	97.5	↑3.1
4/20 00:40	100.8	↑3.3
4/20 00:50	104.1	↑3.3
4/20 01:00	107.6	↑3.5
4/20 01:10	111.2	↑3.6
4/20 01:20	114.8	↑3.6
4/20 01:30	118.4	↑3.6
4/20 01:40	121.9	↑3.5
4/20 01:50	125.4	↑3.5
4/20 02:00	128.7	↑3.3
4/20 02:10	131.9	↑3.2
4/20 02:20	134.8	↑2.9
4/20 02:30	137.5	↑2.7
4/20 02:40	139.8	↑2.3
4/20 02:50	141.7	↑1.9
4/20 03:00	143.3	↑1.6
4/20 03:10	144.4	↑1.1
4/20 03:20	145.1	↑0.7
4/20 03:30	145.4	↑0.3	満潮
4/20 03:40	145.2	↓-0.2
4/20 03:50	144.5	↓-0.7
4/20 04:00	143.5	↓-1.0
4/20 04:10	142.0	↓-1.5
4/20 04:20	140.2	↓-1.8
4/20 04:30	138.0	↓-2.2
4/20 04:40	135.5	↓-2.5
4/20 04:50	132.6	↓-2.9
4/20 05:00	129.5	↓-3.1
4/20 05:10	126.2	↓-3.3
4/20 05:20	122.6	↓-3.6
4/20 05:30	118.8	↓-3.8
4/20 05:40	114.8	↓-4.0
4/20 05:50	110.6	↓-4.2
4/20 06:00	106.2	↓-4.4
4/20 06:10	101.6	↓-4.6
4/20 06:20	96.9	↓-4.7
4/20 06:30	92.0	↓-4.9
4/20 06:40	86.9	↓-5.1
4/20 06:50	81.7	↓-5.2
4/20 07:00	76.3	↓-5.4
4/20 07:10	70.8	↓-5.5
4/20 07:20	65.3	↓-5.5
4/20 07:30	59.7	↓-5.6
4/20 07:40	54.0	↓-5.7	最大潮位差
4/20 07:50	48.4	↓-5.6
4/20 08:00	42.8	↓-5.6
4/20 08:10	37.4	↓-5.4
4/20 08:20	32.1	↓-5.3
4/20 08:30	27.1	↓-5.0
4/20 08:40	22.3	↓-4.8
4/20 08:50	17.8	↓-4.5
4/20 09:00	13.7	↓-4.1
4/20 09:10	9.9	↓-3.8
4/20 09:20	6.6	↓-3.3
4/20 09:30	3.7	↓-2.9
4/20 09:40	1.2	↓-2.5
4/20 09:50	-0.8	↓-2.0
4/20 10:00	-2.4	↓-1.6
4/20 10:10	-3.6	↓-1.2
4/20 10:20	-4.3	↓-0.7
4/20 10:30	-4.6	↓-0.3	干潮
4/20 10:40	-4.6	0
4/20 10:50	-4.2	↑0.4
4/20 11:00	-3.4	↑0.8
4/20 11:10	-2.3	↑1.1
4/20 11:20	-0.9	↑1.4
4/20 11:30	0.8	↑1.7
4/20 11:40	2.8	↑2.0
4/20 11:50	5.1	↑2.3
4/20 12:00	7.7	↑2.6
4/20 12:10	10.5	↑2.8
4/20 12:20	13.7	↑3.2
4/20 12:30	17.1	↑3.4
4/20 12:40	20.8	↑3.7
4/20 12:50	24.7	↑3.9
4/20 13:00	29.0	↑4.3
4/20 13:10	33.4	↑4.4
4/20 13:20	38.1	↑4.7
4/20 13:30	43.1	↑5.0
4/20 13:40	48.1	↑5.0
4/20 13:50	53.4	↑5.3
4/20 14:00	58.7	↑5.3
4/20 14:10	64.0	↑5.3
4/20 14:20	69.3	↑5.3
4/20 14:30	74.6	↑5.3
4/20 14:40	79.8	↑5.2
4/20 14:50	84.8	↑5.0
4/20 15:00	89.6	↑4.8
4/20 15:10	94.1	↑4.5
4/20 15:20	98.3	↑4.2
4/20 15:30	102.3	↑4.0
4/20 15:40	105.9	↑3.6
4/20 15:50	109.1	↑3.2
4/20 16:00	112.0	↑2.9
4/20 16:10	114.5	↑2.5
4/20 16:20	116.7	↑2.2
4/20 16:30	118.5	↑1.8
4/20 16:40	120.0	↑1.5
4/20 16:50	121.3	↑1.3
4/20 17:00	122.2	↑0.9
4/20 17:10	122.9	↑0.7
4/20 17:20	123.3	↑0.4
4/20 17:30	123.6	↑0.3	満潮
4/20 17:40	123.6	0
4/20 17:50	123.4	↓-0.2
4/20 18:00	123.0	↓-0.4
4/20 18:10	122.4	↓-0.6
4/20 18:20	121.6	↓-0.8
4/20 18:30	120.6	↓-1.0
4/20 18:40	119.3	↓-1.3
4/20 18:50	117.9	↓-1.4
4/20 19:00	116.3	↓-1.6
4/20 19:10	114.4	↓-1.9
4/20 19:20	112.4	↓-2.0
4/20 19:30	110.2	↓-2.2
4/20 19:40	107.8	↓-2.4
4/20 19:50	105.2	↓-2.6
4/20 20:00	102.5	↓-2.7
4/20 20:10	99.8	↓-2.7
4/20 20:20	97.0	↓-2.8
4/20 20:30	94.2	↓-2.8
4/20 20:40	91.5	↓-2.7
4/20 20:50	88.9	↓-2.6
4/20 21:00	86.4	↓-2.5
4/20 21:10	84.1	↓-2.3
4/20 21:20	82.1	↓-2.0
4/20 21:30	80.2	↓-1.9
4/20 21:40	78.7	↓-1.5
4/20 21:50	77.4	↓-1.3
4/20 22:00	76.5	↓-0.9
4/20 22:10	75.9	↓-0.6
4/20 22:20	75.6	↓-0.3	干潮
4/20 22:30	75.5	↓-0.1
4/20 22:40	75.8	↑0.3
4/20 22:50	76.4	↑0.6
4/20 23:00	77.1	↑0.7
4/20 23:10	78.2	↑1.1
4/20 23:20	79.4	↑1.2
4/20 23:30	80.8	↑1.4
4/20 23:40	82.4	↑1.6
4/20 23:50	84.2	↑1.8