20 (水)	01:53	08:27	14:50	20:28
	125cm	26cm	124cm	57cm
大潮 出 04:46 入 18:22 出 03:43 入 17:04 潮干狩り ○ 07:16～09:41

苫小牧（北海道）2050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	107.1	↑3.0
4/20 00:10	109.9	↑2.8
4/20 00:20	112.6	↑2.7
4/20 00:30	115.0	↑2.4
4/20 00:40	117.1	↑2.1
4/20 00:50	119.0	↑1.9
4/20 01:00	120.7	↑1.7
4/20 01:10	122.0	↑1.3
4/20 01:20	123.0	↑1.0
4/20 01:30	123.8	↑0.8
4/20 01:40	124.3	↑0.5
4/20 01:50	124.5	↑0.2	満潮
4/20 02:00	124.4	↓-0.1
4/20 02:10	124.1	↓-0.3
4/20 02:20	123.5	↓-0.6
4/20 02:30	122.7	↓-0.8
4/20 02:40	121.6	↓-1.1
4/20 02:50	120.3	↓-1.3
4/20 03:00	118.8	↓-1.5
4/20 03:10	117.0	↓-1.8
4/20 03:20	115.0	↓-2.0
4/20 03:30	112.8	↓-2.2
4/20 03:40	110.4	↓-2.4
4/20 03:50	107.8	↓-2.6
4/20 04:00	104.9	↓-2.9
4/20 04:10	101.8	↓-3.1
4/20 04:20	98.5	↓-3.3
4/20 04:30	95.0	↓-3.5
4/20 04:40	91.4	↓-3.6
4/20 04:50	87.5	↓-3.9
4/20 05:00	83.6	↓-3.9
4/20 05:10	79.5	↓-4.1
4/20 05:20	75.3	↓-4.2
4/20 05:30	71.1	↓-4.2
4/20 05:40	66.9	↓-4.2
4/20 05:50	62.7	↓-4.2
4/20 06:00	58.6	↓-4.1
4/20 06:10	54.6	↓-4.0
4/20 06:20	50.7	↓-3.9
4/20 06:30	47.1	↓-3.6
4/20 06:40	43.7	↓-3.4
4/20 06:50	40.5	↓-3.2
4/20 07:00	37.6	↓-2.9
4/20 07:10	35.0	↓-2.6
4/20 07:20	32.7	↓-2.3
4/20 07:30	30.8	↓-1.9
4/20 07:40	29.2	↓-1.6
4/20 07:50	27.9	↓-1.3
4/20 08:00	26.9	↓-1.0
4/20 08:10	26.3	↓-0.6
4/20 08:20	25.9	↓-0.4	干潮
4/20 08:30	25.9	0
4/20 08:40	26.2	↑0.3
4/20 08:50	26.7	↑0.5
4/20 09:00	27.6	↑0.9
4/20 09:10	28.7	↑1.1
4/20 09:20	30.1	↑1.4
4/20 09:30	31.8	↑1.7
4/20 09:40	33.7	↑1.9
4/20 09:50	36.0	↑2.3
4/20 10:00	38.4	↑2.4
4/20 10:10	41.2	↑2.8
4/20 10:20	44.2	↑3.0
4/20 10:30	47.4	↑3.2
4/20 10:40	50.9	↑3.5
4/20 10:50	54.6	↑3.7
4/20 11:00	58.5	↑3.9
4/20 11:10	62.5	↑4.0
4/20 11:20	66.7	↑4.2
4/20 11:30	71.0	↑4.3
4/20 11:40	75.3	↑4.3
4/20 11:50	79.7	↑4.4	最大潮位差
4/20 12:00	84.0	↑4.3
4/20 12:10	88.2	↑4.2
4/20 12:20	92.4	↑4.2
4/20 12:30	96.4	↑4.0
4/20 12:40	100.1	↑3.7
4/20 12:50	103.7	↑3.6
4/20 13:00	107.0	↑3.3
4/20 13:10	110.1	↑3.1
4/20 13:20	112.8	↑2.7
4/20 13:30	115.2	↑2.4
4/20 13:40	117.4	↑2.2
4/20 13:50	119.2	↑1.8
4/20 14:00	120.7	↑1.5
4/20 14:10	121.9	↑1.2
4/20 14:20	122.8	↑0.9
4/20 14:30	123.4	↑0.6
4/20 14:40	123.8	↑0.4	満潮
4/20 14:50	123.9	↑0.1	満潮
4/20 15:00	123.7	↓-0.2
4/20 15:10	123.4	↓-0.3
4/20 15:20	122.7	↓-0.7
4/20 15:30	121.9	↓-0.8
4/20 15:40	120.8	↓-1.1
4/20 15:50	119.5	↓-1.3
4/20 16:00	118.0	↓-1.5
4/20 16:10	116.2	↓-1.8
4/20 16:20	114.3	↓-1.9
4/20 16:30	112.1	↓-2.2
4/20 16:40	109.7	↓-2.4
4/20 16:50	107.1	↓-2.6
4/20 17:00	104.3	↓-2.8
4/20 17:10	101.4	↓-2.9
4/20 17:20	98.3	↓-3.1
4/20 17:30	95.1	↓-3.2
4/20 17:40	91.9	↓-3.2
4/20 17:50	88.5	↓-3.4
4/20 18:00	85.2	↓-3.3
4/20 18:10	81.9	↓-3.3
4/20 18:20	78.7	↓-3.2
4/20 18:30	75.6	↓-3.1
4/20 18:40	72.6	↓-3.0
4/20 18:50	69.9	↓-2.7
4/20 19:00	67.3	↓-2.6
4/20 19:10	65.0	↓-2.3
4/20 19:20	63.0	↓-2.0
4/20 19:30	61.3	↓-1.7
4/20 19:40	59.8	↓-1.5
4/20 19:50	58.6	↓-1.2
4/20 20:00	57.8	↓-0.8
4/20 20:10	57.2	↓-0.6
4/20 20:20	56.9	↓-0.3	干潮
4/20 20:30	56.8	↓-0.1
4/20 20:40	57.0	↑0.2
4/20 20:50	57.5	↑0.5
4/20 21:00	58.2	↑0.7
4/20 21:10	59.1	↑0.9
4/20 21:20	60.2	↑1.1
4/20 21:30	61.5	↑1.3
4/20 21:40	63.0	↑1.5
4/20 21:50	64.7	↑1.7
4/20 22:00	66.6	↑1.9
4/20 22:10	68.7	↑2.1
4/20 22:20	70.9	↑2.2
4/20 22:30	73.4	↑2.5
4/20 22:40	76.0	↑2.6
4/20 22:50	78.8	↑2.8
4/20 23:00	81.8	↑3.0
4/20 23:10	84.9	↑3.1
4/20 23:20	88.2	↑3.3
4/20 23:30	91.6	↑3.4
4/20 23:40	95.0	↑3.4
4/20 23:50	98.5	↑3.5