21 (月)	00:27	02:58	07:50	17:10
	100cm	99cm	105cm	44cm
長潮 出 04:45 入 18:23 出 11:42 入 02:08

苫小牧（北海道）2059年04月21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
4/21 00:00	99.8	↑0.2
4/21 00:10	99.9	↑0.1
4/21 00:20	100.0	↑0.1	満潮
4/21 00:30	100.0	0
4/21 00:40	99.9	↓-0.1
4/21 00:50	99.8	↓-0.1
4/21 01:00	99.7	↓-0.1
4/21 01:10	99.6	↓-0.1
4/21 01:20	99.5	↓-0.1
4/21 01:30	99.3	↓-0.2
4/21 01:40	99.2	↓-0.1
4/21 01:50	99.1	↓-0.1
4/21 02:00	99.0	↓-0.1
4/21 02:10	98.9	↓-0.1
4/21 02:20	98.9	0
4/21 02:30	98.8	↓-0.1
4/21 02:40	98.8	0
4/21 02:50	98.8	0	干潮
4/21 03:00	98.8	0
4/21 03:10	98.8	0
4/21 03:20	98.8	0
4/21 03:30	98.8	0
4/21 03:40	98.9	↑0.1
4/21 03:50	98.9	0
4/21 04:00	98.9	0
4/21 04:10	99.0	↑0.1
4/21 04:20	99.0	0
4/21 04:30	99.1	↑0.1
4/21 04:40	99.2	↑0.1
4/21 04:50	99.3	↑0.1
4/21 05:00	99.4	↑0.1
4/21 05:10	99.6	↑0.2
4/21 05:20	99.9	↑0.3
4/21 05:30	100.1	↑0.2
4/21 05:40	100.4	↑0.3
4/21 05:50	100.8	↑0.4
4/21 06:00	101.1	↑0.3
4/21 06:10	101.5	↑0.4
4/21 06:20	101.9	↑0.4
4/21 06:30	102.3	↑0.4
4/21 06:40	102.7	↑0.4
4/21 06:50	103.1	↑0.4
4/21 07:00	103.4	↑0.3
4/21 07:10	103.7	↑0.3
4/21 07:20	104.0	↑0.3
4/21 07:30	104.1	↑0.1
4/21 07:40	104.3	↑0.2	満潮
4/21 07:50	104.3	0	満潮
4/21 08:00	104.2	↓-0.1
4/21 08:10	104.1	↓-0.1
4/21 08:20	103.9	↓-0.2
4/21 08:30	103.6	↓-0.3
4/21 08:40	103.2	↓-0.4
4/21 08:50	102.8	↓-0.4
4/21 09:00	102.3	↓-0.5
4/21 09:10	101.7	↓-0.6
4/21 09:20	101.1	↓-0.6
4/21 09:30	100.4	↓-0.7
4/21 09:40	99.7	↓-0.7
4/21 09:50	98.9	↓-0.8
4/21 10:00	98.1	↓-0.8
4/21 10:10	97.2	↓-0.9
4/21 10:20	96.4	↓-0.8
4/21 10:30	95.4	↓-1.0
4/21 10:40	94.4	↓-1.0
4/21 10:50	93.4	↓-1.0
4/21 11:00	92.4	↓-1.0
4/21 11:10	91.2	↓-1.2
4/21 11:20	90.0	↓-1.2
4/21 11:30	88.8	↓-1.2
4/21 11:40	87.4	↓-1.4
4/21 11:50	86.0	↓-1.4
4/21 12:00	84.6	↓-1.4
4/21 12:10	83.0	↓-1.6
4/21 12:20	81.4	↓-1.6
4/21 12:30	79.8	↓-1.6
4/21 12:40	78.0	↓-1.8
4/21 12:50	76.3	↓-1.7
4/21 13:00	74.5	↓-1.8
4/21 13:10	72.7	↓-1.8
4/21 13:20	70.9	↓-1.8
4/21 13:30	69.0	↓-1.9
4/21 13:40	67.2	↓-1.8
4/21 13:50	65.4	↓-1.8
4/21 14:00	63.6	↓-1.8
4/21 14:10	61.9	↓-1.7
4/21 14:20	60.2	↓-1.7
4/21 14:30	58.5	↓-1.7
4/21 14:40	56.9	↓-1.6
4/21 14:50	55.4	↓-1.5
4/21 15:00	53.9	↓-1.5
4/21 15:10	52.5	↓-1.4
4/21 15:20	51.2	↓-1.3
4/21 15:30	50.0	↓-1.2
4/21 15:40	48.8	↓-1.2
4/21 15:50	47.8	↓-1.0
4/21 16:00	46.8	↓-1.0
4/21 16:10	46.0	↓-0.8
4/21 16:20	45.3	↓-0.7
4/21 16:30	44.7	↓-0.6
4/21 16:40	44.2	↓-0.5
4/21 16:50	43.8	↓-0.4
4/21 17:00	43.6	↓-0.2	干潮
4/21 17:10	43.6	0	干潮
4/21 17:20	43.7	↑0.1
4/21 17:30	43.9	↑0.2
4/21 17:40	44.4	↑0.5
4/21 17:50	44.9	↑0.5
4/21 18:00	45.7	↑0.8
4/21 18:10	46.6	↑0.9
4/21 18:20	47.6	↑1.0
4/21 18:30	48.8	↑1.2
4/21 18:40	50.1	↑1.3
4/21 18:50	51.5	↑1.4
4/21 19:00	53.1	↑1.6
4/21 19:10	54.7	↑1.6
4/21 19:20	56.5	↑1.8
4/21 19:30	58.3	↑1.8
4/21 19:40	60.1	↑1.8
4/21 19:50	62.0	↑1.9
4/21 20:00	64.0	↑2.0	最大潮位差
4/21 20:10	65.9	↑1.9
4/21 20:20	67.9	↑2.0	最大潮位差
4/21 20:30	69.8	↑1.9
4/21 20:40	71.8	↑2.0	最大潮位差
4/21 20:50	73.7	↑1.9
4/21 21:00	75.6	↑1.9
4/21 21:10	77.5	↑1.9
4/21 21:20	79.4	↑1.9
4/21 21:30	81.2	↑1.8
4/21 21:40	83.0	↑1.8
4/21 21:50	84.8	↑1.8
4/21 22:00	86.5	↑1.7
4/21 22:10	88.2	↑1.7
4/21 22:20	89.8	↑1.6
4/21 22:30	91.3	↑1.5
4/21 22:40	92.8	↑1.5
4/21 22:50	94.3	↑1.5
4/21 23:00	95.6	↑1.3
4/21 23:10	96.9	↑1.3
4/21 23:20	98.1	↑1.2
4/21 23:30	99.2	↑1.1
4/21 23:40	100.2	↑1.0
4/21 23:50	101.1	↑0.9