20 (木)	03:30	10:16	16:48	22:15
	139cm	4cm	130cm	62cm
大潮 出 04:46 入 18:22 出 05:50 入 20:04 潮干狩り ◎ 08:16～12:31

苫小牧（北海道）2034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	78.5	↑3.0
4/20 00:10	81.6	↑3.1
4/20 00:20	85.0	↑3.4
4/20 00:30	88.4	↑3.4
4/20 00:40	92.1	↑3.7
4/20 00:50	95.8	↑3.7
4/20 01:00	99.6	↑3.8
4/20 01:10	103.5	↑3.9
4/20 01:20	107.4	↑3.9
4/20 01:30	111.3	↑3.9
4/20 01:40	115.0	↑3.7
4/20 01:50	118.7	↑3.7
4/20 02:00	122.1	↑3.4
4/20 02:10	125.4	↑3.3
4/20 02:20	128.3	↑2.9
4/20 02:30	130.9	↑2.6
4/20 02:40	133.1	↑2.2
4/20 02:50	135.0	↑1.9
4/20 03:00	136.4	↑1.4
4/20 03:10	137.5	↑1.1
4/20 03:20	138.0	↑0.5	満潮
4/20 03:30	138.2	↑0.2	満潮
4/20 03:40	137.9	↓-0.3
4/20 03:50	137.3	↓-0.6
4/20 04:00	136.3	↓-1.0
4/20 04:10	134.9	↓-1.4
4/20 04:20	133.1	↓-1.8
4/20 04:30	131.1	↓-2.0
4/20 04:40	128.8	↓-2.3
4/20 04:50	126.2	↓-2.6
4/20 05:00	123.4	↓-2.8
4/20 05:10	120.4	↓-3.0
4/20 05:20	117.1	↓-3.3
4/20 05:30	113.6	↓-3.5
4/20 05:40	109.9	↓-3.7
4/20 05:50	106.0	↓-3.9
4/20 06:00	102.0	↓-4.0
4/20 06:10	97.7	↓-4.3
4/20 06:20	93.2	↓-4.5
4/20 06:30	88.5	↓-4.7
4/20 06:40	83.6	↓-4.9
4/20 06:50	78.5	↓-5.1
4/20 07:00	73.4	↓-5.1
4/20 07:10	68.1	↓-5.3
4/20 07:20	62.7	↓-5.4
4/20 07:30	57.3	↓-5.4
4/20 07:40	51.9	↓-5.4
4/20 07:50	46.6	↓-5.3
4/20 08:00	41.3	↓-5.3
4/20 08:10	36.3	↓-5.0
4/20 08:20	31.5	↓-4.8
4/20 08:30	26.9	↓-4.6
4/20 08:40	22.7	↓-4.2
4/20 08:50	18.8	↓-3.9
4/20 09:00	15.3	↓-3.5
4/20 09:10	12.3	↓-3.0
4/20 09:20	9.6	↓-2.7
4/20 09:30	7.5	↓-2.1
4/20 09:40	5.8	↓-1.7
4/20 09:50	4.5	↓-1.3
4/20 10:00	3.7	↓-0.8
4/20 10:10	3.3	↓-0.4	干潮
4/20 10:20	3.3	0
4/20 10:30	3.7	↑0.4
4/20 10:40	4.4	↑0.7
4/20 10:50	5.5	↑1.1
4/20 11:00	7.0	↑1.5
4/20 11:10	8.7	↑1.7
4/20 11:20	10.8	↑2.1
4/20 11:30	13.2	↑2.4
4/20 11:40	15.8	↑2.6
4/20 11:50	18.8	↑3.0
4/20 12:00	22.0	↑3.2
4/20 12:10	25.6	↑3.6
4/20 12:20	29.4	↑3.8
4/20 12:30	33.5	↑4.1
4/20 12:40	37.9	↑4.4
4/20 12:50	42.5	↑4.6
4/20 13:00	47.4	↑4.9
4/20 13:10	52.5	↑5.1
4/20 13:20	57.7	↑5.2
4/20 13:30	63.1	↑5.4
4/20 13:40	68.6	↑5.5	最大潮位差
4/20 13:50	74.1	↑5.5	最大潮位差
4/20 14:00	79.6	↑5.5	最大潮位差
4/20 14:10	85.0	↑5.4
4/20 14:20	90.3	↑5.3
4/20 14:30	95.4	↑5.1
4/20 14:40	100.3	↑4.9
4/20 14:50	104.9	↑4.6
4/20 15:00	109.1	↑4.2
4/20 15:10	113.0	↑3.9
4/20 15:20	116.4	↑3.4
4/20 15:30	119.5	↑3.1
4/20 15:40	122.2	↑2.7
4/20 15:50	124.4	↑2.2
4/20 16:00	126.2	↑1.8
4/20 16:10	127.6	↑1.4
4/20 16:20	128.7	↑1.1
4/20 16:30	129.4	↑0.7
4/20 16:40	129.7	↑0.3	満潮
4/20 16:50	129.8	↑0.1
4/20 17:00	129.5	↓-0.3
4/20 17:10	129.0	↓-0.5
4/20 17:20	128.3	↓-0.7
4/20 17:30	127.3	↓-1.0
4/20 17:40	126.2	↓-1.1
4/20 17:50	124.8	↓-1.4
4/20 18:00	123.2	↓-1.6
4/20 18:10	121.4	↓-1.8
4/20 18:20	119.3	↓-2.1
4/20 18:30	117.1	↓-2.2
4/20 18:40	114.7	↓-2.4
4/20 18:50	112.1	↓-2.6
4/20 19:00	109.2	↓-2.9
4/20 19:10	106.2	↓-3.0
4/20 19:20	103.1	↓-3.1
4/20 19:30	99.8	↓-3.3
4/20 19:40	96.4	↓-3.4
4/20 19:50	92.9	↓-3.5
4/20 20:00	89.4	↓-3.5
4/20 20:10	86.0	↓-3.4
4/20 20:20	82.6	↓-3.4
4/20 20:30	79.3	↓-3.3
4/20 20:40	76.2	↓-3.1
4/20 20:50	73.3	↓-2.9
4/20 21:00	70.6	↓-2.7
4/20 21:10	68.3	↓-2.3
4/20 21:20	66.2	↓-2.1
4/20 21:30	64.5	↓-1.7
4/20 21:40	63.2	↓-1.3
4/20 21:50	62.2	↓-1.0
4/20 22:00	61.6	↓-0.6
4/20 22:10	61.3	↓-0.3	干潮
4/20 22:20	61.3	0
4/20 22:30	61.7	↑0.4
4/20 22:40	62.3	↑0.6
4/20 22:50	63.2	↑0.9
4/20 23:00	64.4	↑1.2
4/20 23:10	65.8	↑1.4
4/20 23:20	67.3	↑1.5
4/20 23:30	69.1	↑1.8
4/20 23:40	71.0	↑1.9
4/20 23:50	73.1	↑2.1