20 (水)	04:40	10:33	16:32	22:54
	133cm	47cm	139cm	28cm
中潮 出 06:24 入 17:13 出 19:46 入 06:52

苫小牧（北海道）2030年02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
2/20 00:00	33.8	↑2.9
2/20 00:10	36.9	↑3.1
2/20 00:20	40.2	↑3.3
2/20 00:30	43.8	↑3.6
2/20 00:40	47.7	↑3.9
2/20 00:50	51.8	↑4.1
2/20 01:00	56.1	↑4.3
2/20 01:10	60.7	↑4.6
2/20 01:20	65.4	↑4.7
2/20 01:30	70.3	↑4.9
2/20 01:40	75.2	↑4.9
2/20 01:50	80.3	↑5.1	最大潮位差
2/20 02:00	85.3	↑5.0
2/20 02:10	90.4	↑5.1	最大潮位差
2/20 02:20	95.3	↑4.9
2/20 02:30	100.1	↑4.8
2/20 02:40	104.6	↑4.5
2/20 02:50	109.0	↑4.4
2/20 03:00	113.0	↑4.0
2/20 03:10	116.7	↑3.7
2/20 03:20	120.0	↑3.3
2/20 03:30	122.9	↑2.9
2/20 03:40	125.4	↑2.5
2/20 03:50	127.5	↑2.1
2/20 04:00	129.2	↑1.7
2/20 04:10	130.5	↑1.3
2/20 04:20	131.4	↑0.9
2/20 04:30	131.9	↑0.5	満潮
2/20 04:40	132.0	↑0.1	満潮
2/20 04:50	131.8	↓-0.2
2/20 05:00	131.3	↓-0.5
2/20 05:10	130.5	↓-0.8
2/20 05:20	129.4	↓-1.1
2/20 05:30	128.1	↓-1.3
2/20 05:40	126.6	↓-1.5
2/20 05:50	124.8	↓-1.8
2/20 06:00	122.8	↓-2.0
2/20 06:10	120.6	↓-2.2
2/20 06:20	118.2	↓-2.4
2/20 06:30	115.6	↓-2.6
2/20 06:40	112.7	↓-2.9
2/20 06:50	109.7	↓-3.0
2/20 07:00	106.5	↓-3.2
2/20 07:10	103.1	↓-3.4
2/20 07:20	99.5	↓-3.6
2/20 07:30	95.8	↓-3.7
2/20 07:40	92.0	↓-3.8
2/20 07:50	88.0	↓-4.0
2/20 08:00	84.0	↓-4.0
2/20 08:10	80.0	↓-4.0
2/20 08:20	76.1	↓-3.9
2/20 08:30	72.2	↓-3.9
2/20 08:40	68.4	↓-3.8
2/20 08:50	64.8	↓-3.6
2/20 09:00	61.5	↓-3.3
2/20 09:10	58.4	↓-3.1
2/20 09:20	55.6	↓-2.8
2/20 09:30	53.1	↓-2.5
2/20 09:40	51.0	↓-2.1
2/20 09:50	49.3	↓-1.7
2/20 10:00	47.9	↓-1.4
2/20 10:10	46.9	↓-1.0
2/20 10:20	46.3	↓-0.6
2/20 10:30	46.1	↓-0.2	干潮
2/20 10:40	46.2	↑0.1
2/20 10:50	46.6	↑0.4
2/20 11:00	47.3	↑0.7
2/20 11:10	48.3	↑1.0
2/20 11:20	49.6	↑1.3
2/20 11:30	51.1	↑1.5
2/20 11:40	52.8	↑1.7
2/20 11:50	54.8	↑2.0
2/20 12:00	57.0	↑2.2
2/20 12:10	59.4	↑2.4
2/20 12:20	62.0	↑2.6
2/20 12:30	64.8	↑2.8
2/20 12:40	67.7	↑2.9
2/20 12:50	70.9	↑3.2
2/20 13:00	74.3	↑3.4
2/20 13:10	77.9	↑3.6
2/20 13:20	81.6	↑3.7
2/20 13:30	85.5	↑3.9
2/20 13:40	89.6	↑4.1
2/20 13:50	93.7	↑4.1
2/20 14:00	97.9	↑4.2
2/20 14:10	102.2	↑4.3
2/20 14:20	106.4	↑4.2
2/20 14:30	110.5	↑4.1
2/20 14:40	114.6	↑4.1
2/20 14:50	118.4	↑3.8
2/20 15:00	122.1	↑3.7
2/20 15:10	125.5	↑3.4
2/20 15:20	128.5	↑3.0
2/20 15:30	131.2	↑2.7
2/20 15:40	133.6	↑2.4
2/20 15:50	135.5	↑1.9
2/20 16:00	137.0	↑1.5
2/20 16:10	138.1	↑1.1
2/20 16:20	138.7	↑0.6
2/20 16:30	138.9	↑0.2	満潮
2/20 16:40	138.8	↓-0.1
2/20 16:50	138.2	↓-0.6
2/20 17:00	137.3	↓-0.9
2/20 17:10	136.1	↓-1.2
2/20 17:20	134.5	↓-1.6
2/20 17:30	132.7	↓-1.8
2/20 17:40	130.6	↓-2.1
2/20 17:50	128.3	↓-2.3
2/20 18:00	125.7	↓-2.6
2/20 18:10	122.9	↓-2.8
2/20 18:20	120.0	↓-2.9
2/20 18:30	116.8	↓-3.2
2/20 18:40	113.5	↓-3.3
2/20 18:50	109.9	↓-3.6
2/20 19:00	106.2	↓-3.7
2/20 19:10	102.3	↓-3.9
2/20 19:20	98.3	↓-4.0
2/20 19:30	94.0	↓-4.3
2/20 19:40	89.7	↓-4.3
2/20 19:50	85.2	↓-4.5
2/20 20:00	80.6	↓-4.6
2/20 20:10	75.9	↓-4.7
2/20 20:20	71.3	↓-4.6
2/20 20:30	66.6	↓-4.7
2/20 20:40	62.0	↓-4.6
2/20 20:50	57.6	↓-4.4
2/20 21:00	53.3	↓-4.3
2/20 21:10	49.2	↓-4.1
2/20 21:20	45.3	↓-3.9
2/20 21:30	41.8	↓-3.5
2/20 21:40	38.7	↓-3.1
2/20 21:50	35.9	↓-2.8
2/20 22:00	33.5	↓-2.4
2/20 22:10	31.5	↓-2.0
2/20 22:20	29.9	↓-1.6
2/20 22:30	28.8	↓-1.1
2/20 22:40	28.1	↓-0.7
2/20 22:50	27.8	↓-0.3	干潮
2/20 23:00	27.9	↑0.1
2/20 23:10	28.3	↑0.4
2/20 23:20	29.1	↑0.8
2/20 23:30	30.3	↑1.2
2/20 23:40	31.7	↑1.4
2/20 23:50	33.5	↑1.8