20 (水)	02:50	09:26	15:53	21:28
	130cm	13cm	132cm	59cm
大潮 出 04:45 入 18:22 出 04:39 入 18:38 潮干狩り ◎ 07:40～11:21

苫小牧（北海道）2061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	87.1	↑3.6
4/20 00:10	90.8	↑3.7
4/20 00:20	94.5	↑3.7
4/20 00:30	98.2	↑3.7
4/20 00:40	101.8	↑3.6
4/20 00:50	105.4	↑3.6
4/20 01:00	108.9	↑3.5
4/20 01:10	112.3	↑3.4
4/20 01:20	115.4	↑3.1
4/20 01:30	118.3	↑2.9
4/20 01:40	120.9	↑2.6
4/20 01:50	123.2	↑2.3
4/20 02:00	125.2	↑2.0
4/20 02:10	126.9	↑1.7
4/20 02:20	128.1	↑1.2
4/20 02:30	129.0	↑0.9
4/20 02:40	129.5	↑0.5	満潮
4/20 02:50	129.7	↑0.2	満潮
4/20 03:00	129.5	↓-0.2
4/20 03:10	128.9	↓-0.6
4/20 03:20	128.0	↓-0.9
4/20 03:30	126.8	↓-1.2
4/20 03:40	125.3	↓-1.5
4/20 03:50	123.5	↓-1.8
4/20 04:00	121.4	↓-2.1
4/20 04:10	119.2	↓-2.2
4/20 04:20	116.6	↓-2.6
4/20 04:30	113.9	↓-2.7
4/20 04:40	110.9	↓-3.0
4/20 04:50	107.7	↓-3.2
4/20 05:00	104.3	↓-3.4
4/20 05:10	100.7	↓-3.6
4/20 05:20	96.9	↓-3.8
4/20 05:30	92.9	↓-4.0
4/20 05:40	88.7	↓-4.2
4/20 05:50	84.4	↓-4.3
4/20 06:00	79.9	↓-4.5
4/20 06:10	75.3	↓-4.6
4/20 06:20	70.5	↓-4.8
4/20 06:30	65.7	↓-4.8
4/20 06:40	60.9	↓-4.8
4/20 06:50	56.1	↓-4.8
4/20 07:00	51.3	↓-4.8
4/20 07:10	46.6	↓-4.7
4/20 07:20	42.1	↓-4.5
4/20 07:30	37.8	↓-4.3
4/20 07:40	33.7	↓-4.1
4/20 07:50	29.8	↓-3.9
4/20 08:00	26.3	↓-3.5
4/20 08:10	23.2	↓-3.1
4/20 08:20	20.4	↓-2.8
4/20 08:30	18.0	↓-2.4
4/20 08:40	16.0	↓-2.0
4/20 08:50	14.4	↓-1.6
4/20 09:00	13.2	↓-1.2
4/20 09:10	12.4	↓-0.8
4/20 09:20	12.0	↓-0.4	干潮
4/20 09:30	12.1	↑0.1
4/20 09:40	12.4	↑0.3
4/20 09:50	13.2	↑0.8
4/20 10:00	14.2	↑1.0
4/20 10:10	15.6	↑1.4
4/20 10:20	17.4	↑1.8
4/20 10:30	19.4	↑2.0
4/20 10:40	21.7	↑2.3
4/20 10:50	24.3	↑2.6
4/20 11:00	27.2	↑2.9
4/20 11:10	30.4	↑3.2
4/20 11:20	33.8	↑3.4
4/20 11:30	37.5	↑3.7
4/20 11:40	41.4	↑3.9
4/20 11:50	45.6	↑4.2
4/20 12:00	50.1	↑4.5
4/20 12:10	54.7	↑4.6
4/20 12:20	59.5	↑4.8
4/20 12:30	64.4	↑4.9
4/20 12:40	69.5	↑5.1
4/20 12:50	74.6	↑5.1
4/20 13:00	79.8	↑5.2	最大潮位差
4/20 13:10	84.9	↑5.1
4/20 13:20	89.9	↑5.0
4/20 13:30	94.8	↑4.9
4/20 13:40	99.6	↑4.8
4/20 13:50	104.1	↑4.5
4/20 14:00	108.3	↑4.2
4/20 14:10	112.2	↑3.9
4/20 14:20	115.8	↑3.6
4/20 14:30	119.1	↑3.3
4/20 14:40	121.9	↑2.8
4/20 14:50	124.4	↑2.5
4/20 15:00	126.4	↑2.0
4/20 15:10	128.1	↑1.7
4/20 15:20	129.4	↑1.3
4/20 15:30	130.3	↑0.9
4/20 15:40	130.9	↑0.6
4/20 15:50	131.1	↑0.2	満潮
4/20 16:00	131.0	↓-0.1
4/20 16:10	130.6	↓-0.4
4/20 16:20	130.0	↓-0.6
4/20 16:30	129.1	↓-0.9
4/20 16:40	127.9	↓-1.2
4/20 16:50	126.5	↓-1.4
4/20 17:00	124.9	↓-1.6
4/20 17:10	123.1	↓-1.8
4/20 17:20	121.0	↓-2.1
4/20 17:30	118.8	↓-2.2
4/20 17:40	116.3	↓-2.5
4/20 17:50	113.6	↓-2.7
4/20 18:00	110.8	↓-2.8
4/20 18:10	107.8	↓-3.0
4/20 18:20	104.6	↓-3.2
4/20 18:30	101.3	↓-3.3
4/20 18:40	97.9	↓-3.4
4/20 18:50	94.4	↓-3.5
4/20 19:00	90.9	↓-3.5
4/20 19:10	87.4	↓-3.5
4/20 19:20	83.9	↓-3.5
4/20 19:30	80.5	↓-3.4
4/20 19:40	77.2	↓-3.3
4/20 19:50	74.0	↓-3.2
4/20 20:00	71.1	↓-2.9
4/20 20:10	68.5	↓-2.6
4/20 20:20	66.1	↓-2.4
4/20 20:30	64.0	↓-2.1
4/20 20:40	62.3	↓-1.7
4/20 20:50	60.8	↓-1.5
4/20 21:00	59.8	↓-1.0
4/20 21:10	59.0	↓-0.8
4/20 21:20	58.7	↓-0.3	干潮
4/20 21:30	58.6	↓-0.1
4/20 21:40	58.8	↑0.2
4/20 21:50	59.4	↑0.6
4/20 22:00	60.2	↑0.8
4/20 22:10	61.3	↑1.1
4/20 22:20	62.6	↑1.3
4/20 22:30	64.2	↑1.6
4/20 22:40	65.9	↑1.7
4/20 22:50	67.8	↑1.9
4/20 23:00	69.9	↑2.1
4/20 23:10	72.2	↑2.3
4/20 23:20	74.6	↑2.4
4/20 23:30	77.2	↑2.6
4/20 23:40	80.0	↑2.8
4/20 23:50	82.9	↑2.9