20 (月)	00:58	06:18	11:12	18:11
	105cm	81cm	100cm	47cm
長潮 出 04:46 入 18:22 出 02:11 入 13:05

苫小牧（北海道）2009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	102.8	↑0.7
4/20 00:10	103.5	↑0.7
4/20 00:20	104.0	↑0.5
4/20 00:30	104.4	↑0.4
4/20 00:40	104.7	↑0.3
4/20 00:50	104.8	↑0.1	満潮
4/20 01:00	104.8	0
4/20 01:10	104.7	↓-0.1
4/20 01:20	104.5	↓-0.2
4/20 01:30	104.2	↓-0.3
4/20 01:40	103.7	↓-0.5
4/20 01:50	103.2	↓-0.5
4/20 02:00	102.5	↓-0.7
4/20 02:10	101.8	↓-0.7
4/20 02:20	100.9	↓-0.9
4/20 02:30	100.0	↓-0.9
4/20 02:40	99.0	↓-1.0
4/20 02:50	98.0	↓-1.0
4/20 03:00	96.9	↓-1.1
4/20 03:10	95.8	↓-1.1
4/20 03:20	94.6	↓-1.2
4/20 03:30	93.4	↓-1.2
4/20 03:40	92.2	↓-1.2
4/20 03:50	91.0	↓-1.2
4/20 04:00	89.9	↓-1.1
4/20 04:10	88.7	↓-1.2
4/20 04:20	87.6	↓-1.1
4/20 04:30	86.6	↓-1.0
4/20 04:40	85.6	↓-1.0
4/20 04:50	84.6	↓-1.0
4/20 05:00	83.8	↓-0.8
4/20 05:10	83.0	↓-0.8
4/20 05:20	82.4	↓-0.6
4/20 05:30	81.8	↓-0.6
4/20 05:40	81.3	↓-0.5
4/20 05:50	81.0	↓-0.3
4/20 06:00	80.7	↓-0.3
4/20 06:10	80.6	↓-0.1	干潮
4/20 06:20	80.6	0
4/20 06:30	80.6	0
4/20 06:40	80.8	↑0.2
4/20 06:50	81.1	↑0.3
4/20 07:00	81.5	↑0.4
4/20 07:10	82.0	↑0.5
4/20 07:20	82.6	↑0.6
4/20 07:30	83.2	↑0.6
4/20 07:40	83.9	↑0.7
4/20 07:50	84.7	↑0.8
4/20 08:00	85.6	↑0.9
4/20 08:10	86.4	↑0.8
4/20 08:20	87.4	↑1.0
4/20 08:30	88.3	↑0.9
4/20 08:40	89.3	↑1.0
4/20 08:50	90.3	↑1.0
4/20 09:00	91.2	↑0.9
4/20 09:10	92.2	↑1.0
4/20 09:20	93.1	↑0.9
4/20 09:30	94.0	↑0.9
4/20 09:40	94.9	↑0.9
4/20 09:50	95.7	↑0.8
4/20 10:00	96.4	↑0.7
4/20 10:10	97.1	↑0.7
4/20 10:20	97.7	↑0.6
4/20 10:30	98.2	↑0.5
4/20 10:40	98.6	↑0.4
4/20 10:50	98.8	↑0.2
4/20 11:00	99.0	↑0.2
4/20 11:10	99.1	↑0.1	満潮
4/20 11:20	99.1	0
4/20 11:30	98.9	↓-0.2
4/20 11:40	98.6	↓-0.3
4/20 11:50	98.2	↓-0.4
4/20 12:00	97.7	↓-0.5
4/20 12:10	97.0	↓-0.7
4/20 12:20	96.3	↓-0.7
4/20 12:30	95.4	↓-0.9
4/20 12:40	94.4	↓-1.0
4/20 12:50	93.3	↓-1.1
4/20 13:00	92.1	↓-1.2
4/20 13:10	90.8	↓-1.3
4/20 13:20	89.4	↓-1.4
4/20 13:30	87.9	↓-1.5
4/20 13:40	86.3	↓-1.6
4/20 13:50	84.7	↓-1.6
4/20 14:00	82.9	↓-1.8
4/20 14:10	81.1	↓-1.8
4/20 14:20	79.3	↓-1.8
4/20 14:30	77.4	↓-1.9
4/20 14:40	75.4	↓-2.0
4/20 14:50	73.4	↓-2.0
4/20 15:00	71.4	↓-2.0
4/20 15:10	69.4	↓-2.0
4/20 15:20	67.4	↓-2.0
4/20 15:30	65.4	↓-2.0
4/20 15:40	63.4	↓-2.0
4/20 15:50	61.5	↓-1.9
4/20 16:00	59.6	↓-1.9
4/20 16:10	57.8	↓-1.8
4/20 16:20	56.1	↓-1.7
4/20 16:30	54.4	↓-1.7
4/20 16:40	52.9	↓-1.5
4/20 16:50	51.6	↓-1.3
4/20 17:00	50.3	↓-1.3
4/20 17:10	49.2	↓-1.1
4/20 17:20	48.3	↓-0.9
4/20 17:30	47.5	↓-0.8
4/20 17:40	46.9	↓-0.6
4/20 17:50	46.5	↓-0.4
4/20 18:00	46.2	↓-0.3
4/20 18:10	46.1	↓-0.1	干潮
4/20 18:20	46.2	↑0.1
4/20 18:30	46.5	↑0.3
4/20 18:40	46.9	↑0.4
4/20 18:50	47.5	↑0.6
4/20 19:00	48.3	↑0.8
4/20 19:10	49.2	↑0.9
4/20 19:20	50.2	↑1.0
4/20 19:30	51.4	↑1.2
4/20 19:40	52.8	↑1.4
4/20 19:50	54.3	↑1.5
4/20 20:00	55.9	↑1.6
4/20 20:10	57.6	↑1.7
4/20 20:20	59.4	↑1.8
4/20 20:30	61.4	↑2.0
4/20 20:40	63.4	↑2.0
4/20 20:50	65.5	↑2.1
4/20 21:00	67.7	↑2.2
4/20 21:10	69.9	↑2.2
4/20 21:20	72.2	↑2.3
4/20 21:30	74.5	↑2.3
4/20 21:40	76.9	↑2.4	最大潮位差
4/20 21:50	79.3	↑2.4	最大潮位差
4/20 22:00	81.6	↑2.3
4/20 22:10	84.0	↑2.4	最大潮位差
4/20 22:20	86.3	↑2.3
4/20 22:30	88.5	↑2.2
4/20 22:40	90.7	↑2.2
4/20 22:50	92.8	↑2.1
4/20 23:00	94.8	↑2.0
4/20 23:10	96.7	↑1.9
4/20 23:20	98.5	↑1.8
4/20 23:30	100.1	↑1.6
4/20 23:40	101.7	↑1.6
4/20 23:50	103.1	↑1.4