20 (日)	02:31	09:22	16:00	21:14
	133cm	17cm	124cm	65cm
大潮 出 04:46 入 18:22 出 18:26 入 04:10 潮干狩り ◎ 07:38～11:11

苫小牧（北海道）2008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	99.2	↑3.5
4/20 00:10	102.8	↑3.6
4/20 00:20	106.2	↑3.4
4/20 00:30	109.6	↑3.4
4/20 00:40	112.9	↑3.3
4/20 00:50	116.0	↑3.1
4/20 01:00	118.9	↑2.9
4/20 01:10	121.6	↑2.7
4/20 01:20	124.0	↑2.4
4/20 01:30	126.1	↑2.1
4/20 01:40	127.9	↑1.8
4/20 01:50	129.4	↑1.5
4/20 02:00	130.6	↑1.2
4/20 02:10	131.4	↑0.8
4/20 02:20	131.9	↑0.5
4/20 02:30	132.0	↑0.1	満潮
4/20 02:40	131.9	↓-0.1
4/20 02:50	131.4	↓-0.5
4/20 03:00	130.6	↓-0.8
4/20 03:10	129.6	↓-1.0
4/20 03:20	128.3	↓-1.3
4/20 03:30	126.7	↓-1.6
4/20 03:40	124.9	↓-1.8
4/20 03:50	122.8	↓-2.1
4/20 04:00	120.5	↓-2.3
4/20 04:10	118.0	↓-2.5
4/20 04:20	115.2	↓-2.8
4/20 04:30	112.2	↓-3.0
4/20 04:40	109.0	↓-3.2
4/20 04:50	105.6	↓-3.4
4/20 05:00	102.0	↓-3.6
4/20 05:10	98.1	↓-3.9
4/20 05:20	94.1	↓-4.0
4/20 05:30	89.9	↓-4.2
4/20 05:40	85.5	↓-4.4
4/20 05:50	81.0	↓-4.5
4/20 06:00	76.4	↓-4.6
4/20 06:10	71.7	↓-4.7	最大潮位差
4/20 06:20	67.0	↓-4.7	最大潮位差
4/20 06:30	62.3	↓-4.7	最大潮位差
4/20 06:40	57.6	↓-4.7	最大潮位差
4/20 06:50	53.1	↓-4.5
4/20 07:00	48.6	↓-4.5
4/20 07:10	44.4	↓-4.2
4/20 07:20	40.4	↓-4.0
4/20 07:30	36.6	↓-3.8
4/20 07:40	33.1	↓-3.5
4/20 07:50	29.9	↓-3.2
4/20 08:00	27.1	↓-2.8
4/20 08:10	24.5	↓-2.6
4/20 08:20	22.3	↓-2.2
4/20 08:30	20.5	↓-1.8
4/20 08:40	19.0	↓-1.5
4/20 08:50	17.8	↓-1.2
4/20 09:00	17.0	↓-0.8
4/20 09:10	16.5	↓-0.5
4/20 09:20	16.3	↓-0.2	干潮
4/20 09:30	16.4	↑0.1
4/20 09:40	16.9	↑0.5
4/20 09:50	17.6	↑0.7
4/20 10:00	18.6	↑1.0
4/20 10:10	19.9	↑1.3
4/20 10:20	21.4	↑1.5
4/20 10:30	23.3	↑1.9
4/20 10:40	25.5	↑2.2
4/20 10:50	27.9	↑2.4
4/20 11:00	30.7	↑2.8
4/20 11:10	33.7	↑3.0
4/20 11:20	37.0	↑3.3
4/20 11:30	40.5	↑3.5
4/20 11:40	44.3	↑3.8
4/20 11:50	48.4	↑4.1
4/20 12:00	52.6	↑4.2
4/20 12:10	57.0	↑4.4
4/20 12:20	61.5	↑4.5
4/20 12:30	66.2	↑4.7	最大潮位差
4/20 12:40	70.9	↑4.7	最大潮位差
4/20 12:50	75.5	↑4.6
4/20 13:00	80.2	↑4.7	最大潮位差
4/20 13:10	84.7	↑4.5
4/20 13:20	89.1	↑4.4
4/20 13:30	93.3	↑4.2
4/20 13:40	97.4	↑4.1
4/20 13:50	101.1	↑3.7
4/20 14:00	104.7	↑3.6
4/20 14:10	107.9	↑3.2
4/20 14:20	110.8	↑2.9
4/20 14:30	113.4	↑2.6
4/20 14:40	115.8	↑2.4
4/20 14:50	117.8	↑2.0
4/20 15:00	119.5	↑1.7
4/20 15:10	120.9	↑1.4
4/20 15:20	122.0	↑1.1
4/20 15:30	122.9	↑0.9
4/20 15:40	123.5	↑0.6
4/20 15:50	123.9	↑0.4	満潮
4/20 16:00	124.0	↑0.1	満潮
4/20 16:10	123.8	↓-0.2
4/20 16:20	123.4	↓-0.4
4/20 16:30	122.8	↓-0.6
4/20 16:40	122.0	↓-0.8
4/20 16:50	120.9	↓-1.1
4/20 17:00	119.5	↓-1.4
4/20 17:10	118.0	↓-1.5
4/20 17:20	116.1	↓-1.9
4/20 17:30	114.1	↓-2.0
4/20 17:40	111.8	↓-2.3
4/20 17:50	109.3	↓-2.5
4/20 18:00	106.6	↓-2.7
4/20 18:10	103.8	↓-2.8
4/20 18:20	100.8	↓-3.0
4/20 18:30	97.7	↓-3.1
4/20 18:40	94.5	↓-3.2
4/20 18:50	91.3	↓-3.2
4/20 19:00	88.1	↓-3.2
4/20 19:10	85.0	↓-3.1
4/20 19:20	82.0	↓-3.0
4/20 19:30	79.1	↓-2.9
4/20 19:40	76.4	↓-2.7
4/20 19:50	73.9	↓-2.5
4/20 20:00	71.7	↓-2.2
4/20 20:10	69.7	↓-2.0
4/20 20:20	68.1	↓-1.6
4/20 20:30	66.7	↓-1.4
4/20 20:40	65.6	↓-1.1
4/20 20:50	64.8	↓-0.8
4/20 21:00	64.3	↓-0.5
4/20 21:10	64.1	↓-0.2	干潮
4/20 21:20	64.2	↑0.1
4/20 21:30	64.5	↑0.3
4/20 21:40	65.0	↑0.5
4/20 21:50	65.8	↑0.8
4/20 22:00	66.8	↑1.0
4/20 22:10	68.1	↑1.3
4/20 22:20	69.5	↑1.4
4/20 22:30	71.1	↑1.6
4/20 22:40	72.9	↑1.8
4/20 22:50	74.9	↑2.0
4/20 23:00	77.1	↑2.2
4/20 23:10	79.5	↑2.4
4/20 23:20	82.1	↑2.6
4/20 23:30	84.8	↑2.7
4/20 23:40	87.7	↑2.9
4/20 23:50	90.8	↑3.1