20 (日)	03:36	10:19	16:48	22:19
	136cm	6cm	129cm	61cm
大潮 出 04:45 入 18:22 出 05:50 入 19:59 潮干狩り ◎ 08:24～12:30

苫小牧（北海道）2053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	76.3	↑2.8
4/20 00:10	79.2	↑2.9
4/20 00:20	82.3	↑3.1
4/20 00:30	85.5	↑3.2
4/20 00:40	88.9	↑3.4
4/20 00:50	92.4	↑3.5
4/20 01:00	96.0	↑3.6
4/20 01:10	99.7	↑3.7
4/20 01:20	103.4	↑3.7
4/20 01:30	107.1	↑3.7
4/20 01:40	110.8	↑3.7
4/20 01:50	114.4	↑3.6
4/20 02:00	117.8	↑3.4
4/20 02:10	121.1	↑3.3
4/20 02:20	124.2	↑3.1
4/20 02:30	126.9	↑2.7
4/20 02:40	129.4	↑2.5
4/20 02:50	131.5	↑2.1
4/20 03:00	133.2	↑1.7
4/20 03:10	134.4	↑1.2
4/20 03:20	135.3	↑0.9
4/20 03:30	135.7	↑0.4	満潮
4/20 03:40	135.7	0
4/20 03:50	135.3	↓-0.4
4/20 04:00	134.4	↓-0.9
4/20 04:10	133.2	↓-1.2
4/20 04:20	131.7	↓-1.5
4/20 04:30	129.8	↓-1.9
4/20 04:40	127.6	↓-2.2
4/20 04:50	125.2	↓-2.4
4/20 05:00	122.5	↓-2.7
4/20 05:10	119.5	↓-3.0
4/20 05:20	116.4	↓-3.1
4/20 05:30	113.1	↓-3.3
4/20 05:40	109.6	↓-3.5
4/20 05:50	105.9	↓-3.7
4/20 06:00	102.1	↓-3.8
4/20 06:10	98.0	↓-4.1
4/20 06:20	93.8	↓-4.2
4/20 06:30	89.5	↓-4.3
4/20 06:40	84.9	↓-4.6
4/20 06:50	80.2	↓-4.7
4/20 07:00	75.4	↓-4.8
4/20 07:10	70.5	↓-4.9
4/20 07:20	65.4	↓-5.1
4/20 07:30	60.3	↓-5.1
4/20 07:40	55.2	↓-5.1
4/20 07:50	50.1	↓-5.1
4/20 08:00	45.0	↓-5.1
4/20 08:10	40.1	↓-4.9
4/20 08:20	35.4	↓-4.7
4/20 08:30	30.8	↓-4.6
4/20 08:40	26.6	↓-4.2
4/20 08:50	22.7	↓-3.9
4/20 09:00	19.1	↓-3.6
4/20 09:10	15.9	↓-3.2
4/20 09:20	13.1	↓-2.8
4/20 09:30	10.8	↓-2.3
4/20 09:40	8.9	↓-1.9
4/20 09:50	7.5	↓-1.4
4/20 10:00	6.5	↓-1.0
4/20 10:10	6.0	↓-0.5	干潮
4/20 10:20	5.9	↓-0.1
4/20 10:30	6.2	↑0.3
4/20 10:40	6.8	↑0.6
4/20 10:50	7.8	↑1.0
4/20 11:00	9.2	↑1.4
4/20 11:10	10.8	↑1.6
4/20 11:20	12.8	↑2.0
4/20 11:30	15.1	↑2.3
4/20 11:40	17.6	↑2.5
4/20 11:50	20.4	↑2.8
4/20 12:00	23.4	↑3.0
4/20 12:10	26.7	↑3.3
4/20 12:20	30.3	↑3.6
4/20 12:30	34.1	↑3.8
4/20 12:40	38.1	↑4.0
4/20 12:50	42.4	↑4.3
4/20 13:00	47.0	↑4.6
4/20 13:10	51.7	↑4.7
4/20 13:20	56.6	↑4.9
4/20 13:30	61.7	↑5.1
4/20 13:40	66.9	↑5.2
4/20 13:50	72.2	↑5.3	最大潮位差
4/20 14:00	77.5	↑5.3	最大潮位差
4/20 14:10	82.8	↑5.3	最大潮位差
4/20 14:20	88.0	↑5.2
4/20 14:30	93.0	↑5.0
4/20 14:40	97.9	↑4.9
4/20 14:50	102.5	↑4.6
4/20 15:00	106.8	↑4.3
4/20 15:10	110.8	↑4.0
4/20 15:20	114.4	↑3.6
4/20 15:30	117.6	↑3.2
4/20 15:40	120.4	↑2.8
4/20 15:50	122.8	↑2.4
4/20 16:00	124.7	↑1.9
4/20 16:10	126.2	↑1.5
4/20 16:20	127.4	↑1.2
4/20 16:30	128.1	↑0.7
4/20 16:40	128.5	↑0.4	満潮
4/20 16:50	128.6	↑0.1
4/20 17:00	128.3	↓-0.3
4/20 17:10	127.8	↓-0.5
4/20 17:20	127.1	↓-0.7
4/20 17:30	126.1	↓-1.0
4/20 17:40	124.9	↓-1.2
4/20 17:50	123.5	↓-1.4
4/20 18:00	121.9	↓-1.6
4/20 18:10	120.1	↓-1.8
4/20 18:20	118.2	↓-1.9
4/20 18:30	116.1	↓-2.1
4/20 18:40	113.8	↓-2.3
4/20 18:50	111.3	↓-2.5
4/20 19:00	108.7	↓-2.6
4/20 19:10	105.9	↓-2.8
4/20 19:20	102.9	↓-3.0
4/20 19:30	99.8	↓-3.1
4/20 19:40	96.6	↓-3.2
4/20 19:50	93.3	↓-3.3
4/20 20:00	89.9	↓-3.4
4/20 20:10	86.6	↓-3.3
4/20 20:20	83.3	↓-3.3
4/20 20:30	80.0	↓-3.3
4/20 20:40	76.9	↓-3.1
4/20 20:50	73.9	↓-3.0
4/20 21:00	71.2	↓-2.7
4/20 21:10	68.7	↓-2.5
4/20 21:20	66.5	↓-2.2
4/20 21:30	64.6	↓-1.9
4/20 21:40	63.1	↓-1.5
4/20 21:50	61.9	↓-1.2
4/20 22:00	61.1	↓-0.8
4/20 22:10	60.7	↓-0.4	干潮
4/20 22:20	60.6	↓-0.1
4/20 22:30	60.8	↑0.2
4/20 22:40	61.3	↑0.5
4/20 22:50	62.2	↑0.9
4/20 23:00	63.3	↑1.1
4/20 23:10	64.6	↑1.3
4/20 23:20	66.1	↑1.5
4/20 23:30	67.9	↑1.8
4/20 23:40	69.8	↑1.9
4/20 23:50	71.8	↑2.0