20 (金)	03:19	09:52	16:23	22:03
	133cm	14cm	132cm	54cm
大潮 出 04:45 入 18:22 出 19:19 入 05:24 潮干狩り ◎ 08:10～11:47

苫小牧（北海道）2057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	74.4	↑3.5
4/20 00:10	78.0	↑3.6
4/20 00:20	81.8	↑3.8
4/20 00:30	85.7	↑3.9
4/20 00:40	89.7	↑4.0
4/20 00:50	93.8	↑4.1
4/20 01:00	97.9	↑4.1
4/20 01:10	101.9	↑4.0
4/20 01:20	105.9	↑4.0
4/20 01:30	109.8	↑3.9
4/20 01:40	113.5	↑3.7
4/20 01:50	117.1	↑3.6
4/20 02:00	120.3	↑3.2
4/20 02:10	123.2	↑2.9
4/20 02:20	125.8	↑2.6
4/20 02:30	128.1	↑2.3
4/20 02:40	129.9	↑1.8
4/20 02:50	131.3	↑1.4
4/20 03:00	132.3	↑1.0
4/20 03:10	132.8	↑0.5	満潮
4/20 03:20	132.9	↑0.1
4/20 03:30	132.7	↓-0.2
4/20 03:40	132.0	↓-0.7
4/20 03:50	131.0	↓-1.0
4/20 04:00	129.6	↓-1.4
4/20 04:10	127.9	↓-1.7
4/20 04:20	125.9	↓-2.0
4/20 04:30	123.7	↓-2.2
4/20 04:40	121.2	↓-2.5
4/20 04:50	118.4	↓-2.8
4/20 05:00	115.5	↓-2.9
4/20 05:10	112.3	↓-3.2
4/20 05:20	109.0	↓-3.3
4/20 05:30	105.4	↓-3.6
4/20 05:40	101.7	↓-3.7
4/20 05:50	97.7	↓-4.0
4/20 06:00	93.6	↓-4.1
4/20 06:10	89.4	↓-4.2
4/20 06:20	84.9	↓-4.5
4/20 06:30	80.4	↓-4.5
4/20 06:40	75.7	↓-4.7
4/20 06:50	70.9	↓-4.8
4/20 07:00	66.0	↓-4.9
4/20 07:10	61.2	↓-4.8
4/20 07:20	56.3	↓-4.9
4/20 07:30	51.5	↓-4.8
4/20 07:40	46.8	↓-4.7
4/20 07:50	42.2	↓-4.6
4/20 08:00	37.9	↓-4.3
4/20 08:10	33.8	↓-4.1
4/20 08:20	30.0	↓-3.8
4/20 08:30	26.5	↓-3.5
4/20 08:40	23.4	↓-3.1
4/20 08:50	20.7	↓-2.7
4/20 09:00	18.3	↓-2.4
4/20 09:10	16.5	↓-1.8
4/20 09:20	15.0	↓-1.5
4/20 09:30	13.9	↓-1.1
4/20 09:40	13.3	↓-0.6
4/20 09:50	13.1	↓-0.2	干潮
4/20 10:00	13.2	↑0.1
4/20 10:10	13.7	↑0.5
4/20 10:20	14.6	↑0.9
4/20 10:30	15.7	↑1.1
4/20 10:40	17.2	↑1.5
4/20 10:50	19.0	↑1.8
4/20 11:00	21.0	↑2.0
4/20 11:10	23.3	↑2.3
4/20 11:20	25.9	↑2.6
4/20 11:30	28.7	↑2.8
4/20 11:40	31.8	↑3.1
4/20 11:50	35.1	↑3.3
4/20 12:00	38.7	↑3.6
4/20 12:10	42.5	↑3.8
4/20 12:20	46.6	↑4.1
4/20 12:30	50.8	↑4.2
4/20 12:40	55.3	↑4.5
4/20 12:50	60.0	↑4.7
4/20 13:00	64.8	↑4.8
4/20 13:10	69.7	↑4.9
4/20 13:20	74.8	↑5.1	最大潮位差
4/20 13:30	79.8	↑5.0
4/20 13:40	84.9	↑5.1	最大潮位差
4/20 13:50	89.9	↑5.0
4/20 14:00	94.8	↑4.9
4/20 14:10	99.5	↑4.7
4/20 14:20	104.0	↑4.5
4/20 14:30	108.3	↑4.3
4/20 14:40	112.2	↑3.9
4/20 14:50	115.9	↑3.7
4/20 15:00	119.1	↑3.2
4/20 15:10	122.0	↑2.9
4/20 15:20	124.4	↑2.4
4/20 15:30	126.5	↑2.1
4/20 15:40	128.2	↑1.7
4/20 15:50	129.5	↑1.3
4/20 16:00	130.4	↑0.9
4/20 16:10	130.9	↑0.5
4/20 16:20	131.1	↑0.2	満潮
4/20 16:30	131.0	↓-0.1
4/20 16:40	130.7	↓-0.3
4/20 16:50	130.0	↓-0.7
4/20 17:00	129.1	↓-0.9
4/20 17:10	127.9	↓-1.2
4/20 17:20	126.6	↓-1.3
4/20 17:30	125.0	↓-1.6
4/20 17:40	123.2	↓-1.8
4/20 17:50	121.1	↓-2.1
4/20 18:00	118.9	↓-2.2
4/20 18:10	116.5	↓-2.4
4/20 18:20	113.8	↓-2.7
4/20 18:30	111.0	↓-2.8
4/20 18:40	107.9	↓-3.1
4/20 18:50	104.7	↓-3.2
4/20 19:00	101.3	↓-3.4
4/20 19:10	97.8	↓-3.5
4/20 19:20	94.2	↓-3.6
4/20 19:30	90.4	↓-3.8
4/20 19:40	86.7	↓-3.7
4/20 19:50	82.9	↓-3.8
4/20 20:00	79.2	↓-3.7
4/20 20:10	75.6	↓-3.6
4/20 20:20	72.2	↓-3.4
4/20 20:30	69.0	↓-3.2
4/20 20:40	66.0	↓-3.0
4/20 20:50	63.2	↓-2.8
4/20 21:00	60.8	↓-2.4
4/20 21:10	58.8	↓-2.0
4/20 21:20	57.1	↓-1.7
4/20 21:30	55.7	↓-1.4
4/20 21:40	54.7	↓-1.0
4/20 21:50	54.1	↓-0.6
4/20 22:00	53.9	↓-0.2	干潮
4/20 22:10	54.0	↑0.1
4/20 22:20	54.4	↑0.4
4/20 22:30	55.2	↑0.8
4/20 22:40	56.2	↑1.0
4/20 22:50	57.5	↑1.3
4/20 23:00	59.0	↑1.5
4/20 23:10	60.7	↑1.7
4/20 23:20	62.7	↑2.0
4/20 23:30	64.8	↑2.1
4/20 23:40	67.2	↑2.4
4/20 23:50	69.7	↑2.5