20 (月)	03:57	11:07	18:08	22:45
	145cm	-8cm	119cm	85cm
中潮 出 04:46 入 18:22 出 06:00 入 22:14 潮干狩り ◎ 08:42～13:52

苫小牧（北海道）2026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	90.2	↑2.1
4/20 00:10	92.5	↑2.3
4/20 00:20	94.8	↑2.3
4/20 00:30	97.2	↑2.4
4/20 00:40	99.7	↑2.5
4/20 00:50	102.3	↑2.6
4/20 01:00	105.0	↑2.7
4/20 01:10	107.7	↑2.7
4/20 01:20	110.6	↑2.9
4/20 01:30	113.4	↑2.8
4/20 01:40	116.4	↑3.0
4/20 01:50	119.3	↑2.9
4/20 02:00	122.3	↑3.0
4/20 02:10	125.2	↑2.9
4/20 02:20	128.1	↑2.9
4/20 02:30	130.8	↑2.7
4/20 02:40	133.4	↑2.6
4/20 02:50	135.8	↑2.4
4/20 03:00	138.0	↑2.2
4/20 03:10	139.9	↑1.9
4/20 03:20	141.5	↑1.6
4/20 03:30	142.7	↑1.2
4/20 03:40	143.6	↑0.9
4/20 03:50	144.0	↑0.4	満潮
4/20 04:00	144.0	0
4/20 04:10	143.6	↓-0.4
4/20 04:20	142.8	↓-0.8
4/20 04:30	141.6	↓-1.2
4/20 04:40	139.9	↓-1.7
4/20 04:50	137.9	↓-2.0
4/20 05:00	135.4	↓-2.5
4/20 05:10	132.7	↓-2.7
4/20 05:20	129.6	↓-3.1
4/20 05:30	126.3	↓-3.3
4/20 05:40	122.7	↓-3.6
4/20 05:50	118.9	↓-3.8
4/20 06:00	114.9	↓-4.0
4/20 06:10	110.7	↓-4.2
4/20 06:20	106.4	↓-4.3
4/20 06:30	101.9	↓-4.5
4/20 06:40	97.2	↓-4.7
4/20 06:50	92.5	↓-4.7
4/20 07:00	87.6	↓-4.9
4/20 07:10	82.6	↓-5.0
4/20 07:20	77.5	↓-5.1
4/20 07:30	72.3	↓-5.2
4/20 07:40	67.0	↓-5.3
4/20 07:50	61.7	↓-5.3
4/20 08:00	56.3	↓-5.4
4/20 08:10	50.9	↓-5.4
4/20 08:20	45.4	↓-5.5	最大潮位差
4/20 08:30	40.1	↓-5.3
4/20 08:40	34.8	↓-5.3
4/20 08:50	29.7	↓-5.1
4/20 09:00	24.7	↓-5.0
4/20 09:10	19.9	↓-4.8
4/20 09:20	15.4	↓-4.5
4/20 09:30	11.2	↓-4.2
4/20 09:40	7.4	↓-3.8
4/20 09:50	3.9	↓-3.5
4/20 10:00	0.8	↓-3.1
4/20 10:10	-1.8	↓-2.6
4/20 10:20	-4.0	↓-2.2
4/20 10:30	-5.8	↓-1.8
4/20 10:40	-7.1	↓-1.3
4/20 10:50	-8.0	↓-0.9
4/20 11:00	-8.4	↓-0.4	干潮
4/20 11:10	-8.4	0
4/20 11:20	-8.1	↑0.3
4/20 11:30	-7.3	↑0.8
4/20 11:40	-6.2	↑1.1
4/20 11:50	-4.8	↑1.4
4/20 12:00	-3.1	↑1.7
4/20 12:10	-1.1	↑2.0
4/20 12:20	1.2	↑2.3
4/20 12:30	3.8	↑2.6
4/20 12:40	6.7	↑2.9
4/20 12:50	9.8	↑3.1
4/20 13:00	13.1	↑3.3
4/20 13:10	16.7	↑3.6
4/20 13:20	20.5	↑3.8
4/20 13:30	24.6	↑4.1
4/20 13:40	28.8	↑4.2
4/20 13:50	33.3	↑4.5
4/20 14:00	38.0	↑4.7
4/20 14:10	42.8	↑4.8
4/20 14:20	47.8	↑5.0
4/20 14:30	52.9	↑5.1
4/20 14:40	58.0	↑5.1
4/20 14:50	63.2	↑5.2
4/20 15:00	68.4	↑5.2
4/20 15:10	73.4	↑5.0
4/20 15:20	78.4	↑5.0
4/20 15:30	83.2	↑4.8
4/20 15:40	87.7	↑4.5
4/20 15:50	92.1	↑4.4
4/20 16:00	96.1	↑4.0
4/20 16:10	99.8	↑3.7
4/20 16:20	103.2	↑3.4
4/20 16:30	106.2	↑3.0
4/20 16:40	108.8	↑2.6
4/20 16:50	111.1	↑2.3
4/20 17:00	113.1	↑2.0
4/20 17:10	114.7	↑1.6
4/20 17:20	116.0	↑1.3
4/20 17:30	117.0	↑1.0
4/20 17:40	117.7	↑0.7
4/20 17:50	118.1	↑0.4
4/20 18:00	118.4	↑0.3	満潮
4/20 18:10	118.4	0
4/20 18:20	118.3	↓-0.1
4/20 18:30	118.0	↓-0.3
4/20 18:40	117.5	↓-0.5
4/20 18:50	116.9	↓-0.6
4/20 19:00	116.1	↓-0.8
4/20 19:10	115.2	↓-0.9
4/20 19:20	114.1	↓-1.1
4/20 19:30	112.9	↓-1.2
4/20 19:40	111.6	↓-1.3
4/20 19:50	110.1	↓-1.5
4/20 20:00	108.5	↓-1.6
4/20 20:10	106.8	↓-1.7
4/20 20:20	105.0	↓-1.8
4/20 20:30	103.1	↓-1.9
4/20 20:40	101.1	↓-2.0
4/20 20:50	99.1	↓-2.0
4/20 21:00	97.1	↓-2.0
4/20 21:10	95.1	↓-2.0
4/20 21:20	93.2	↓-1.9
4/20 21:30	91.4	↓-1.8
4/20 21:40	89.8	↓-1.6
4/20 21:50	88.3	↓-1.5
4/20 22:00	87.0	↓-1.3
4/20 22:10	85.9	↓-1.1
4/20 22:20	85.1	↓-0.8
4/20 22:30	84.6	↓-0.5
4/20 22:40	84.3	↓-0.3	干潮
4/20 22:50	84.4	↑0.1
4/20 23:00	84.7	↑0.3
4/20 23:10	85.2	↑0.5
4/20 23:20	86.1	↑0.9
4/20 23:30	87.1	↑1.0
4/20 23:40	88.4	↑1.3
4/20 23:50	89.8	↑1.4