20 (日)	02:50	09:24	15:50	21:25
	131cm	13cm	132cm	58cm
大潮 出 04:46 入 18:22 出 04:44 入 18:38 潮干狩り ◎ 07:39～11:16

苫小牧（北海道）2042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	87.7	↑3.8
4/20 00:10	91.5	↑3.8
4/20 00:20	95.4	↑3.9
4/20 00:30	99.2	↑3.8
4/20 00:40	103.1	↑3.9
4/20 00:50	106.8	↑3.7
4/20 01:00	110.3	↑3.5
4/20 01:10	113.7	↑3.4
4/20 01:20	116.8	↑3.1
4/20 01:30	119.7	↑2.9
4/20 01:40	122.3	↑2.6
4/20 01:50	124.6	↑2.3
4/20 02:00	126.5	↑1.9
4/20 02:10	128.1	↑1.6
4/20 02:20	129.3	↑1.2
4/20 02:30	130.2	↑0.9
4/20 02:40	130.6	↑0.4	満潮
4/20 02:50	130.8	↑0.2	満潮
4/20 03:00	130.5	↓-0.3
4/20 03:10	130.0	↓-0.5
4/20 03:20	129.1	↓-0.9
4/20 03:30	127.9	↓-1.2
4/20 03:40	126.5	↓-1.4
4/20 03:50	124.7	↓-1.8
4/20 04:00	122.7	↓-2.0
4/20 04:10	120.5	↓-2.2
4/20 04:20	118.0	↓-2.5
4/20 04:30	115.2	↓-2.8
4/20 04:40	112.2	↓-3.0
4/20 04:50	109.0	↓-3.2
4/20 05:00	105.5	↓-3.5
4/20 05:10	101.8	↓-3.7
4/20 05:20	97.9	↓-3.9
4/20 05:30	93.8	↓-4.1
4/20 05:40	89.5	↓-4.3
4/20 05:50	84.9	↓-4.6
4/20 06:00	80.3	↓-4.6
4/20 06:10	75.5	↓-4.8
4/20 06:20	70.6	↓-4.9
4/20 06:30	65.7	↓-4.9
4/20 06:40	60.7	↓-5.0
4/20 06:50	55.8	↓-4.9
4/20 07:00	51.0	↓-4.8
4/20 07:10	46.3	↓-4.7
4/20 07:20	41.7	↓-4.6
4/20 07:30	37.4	↓-4.3
4/20 07:40	33.4	↓-4.0
4/20 07:50	29.7	↓-3.7
4/20 08:00	26.2	↓-3.5
4/20 08:10	23.2	↓-3.0
4/20 08:20	20.5	↓-2.7
4/20 08:30	18.2	↓-2.3
4/20 08:40	16.4	↓-1.8
4/20 08:50	14.9	↓-1.5
4/20 09:00	13.8	↓-1.1
4/20 09:10	13.1	↓-0.7
4/20 09:20	12.8	↓-0.3	干潮
4/20 09:30	12.9	↑0.1
4/20 09:40	13.3	↑0.4
4/20 09:50	14.1	↑0.8
4/20 10:00	15.2	↑1.1
4/20 10:10	16.6	↑1.4
4/20 10:20	18.4	↑1.8
4/20 10:30	20.5	↑2.1
4/20 10:40	22.9	↑2.4
4/20 10:50	25.5	↑2.6
4/20 11:00	28.5	↑3.0
4/20 11:10	31.8	↑3.3
4/20 11:20	35.4	↑3.6
4/20 11:30	39.3	↑3.9
4/20 11:40	43.4	↑4.1
4/20 11:50	47.8	↑4.4
4/20 12:00	52.3	↑4.5
4/20 12:10	57.1	↑4.8
4/20 12:20	62.1	↑5.0
4/20 12:30	67.2	↑5.1
4/20 12:40	72.3	↑5.1
4/20 12:50	77.5	↑5.2	最大潮位差
4/20 13:00	82.7	↑5.2	最大潮位差
4/20 13:10	87.8	↑5.1
4/20 13:20	92.9	↑5.1
4/20 13:30	97.7	↑4.8
4/20 13:40	102.3	↑4.6
4/20 13:50	106.7	↑4.4
4/20 14:00	110.8	↑4.1
4/20 14:10	114.5	↑3.7
4/20 14:20	117.9	↑3.4
4/20 14:30	121.0	↑3.1
4/20 14:40	123.6	↑2.6
4/20 14:50	125.9	↑2.3
4/20 15:00	127.7	↑1.8
4/20 15:10	129.3	↑1.6
4/20 15:20	130.4	↑1.1
4/20 15:30	131.2	↑0.8
4/20 15:40	131.6	↑0.4	満潮
4/20 15:50	131.8	↑0.2	満潮
4/20 16:00	131.6	↓-0.2
4/20 16:10	131.1	↓-0.5
4/20 16:20	130.4	↓-0.7
4/20 16:30	129.4	↓-1.0
4/20 16:40	128.2	↓-1.2
4/20 16:50	126.7	↓-1.5
4/20 17:00	125.0	↓-1.7
4/20 17:10	123.0	↓-2.0
4/20 17:20	120.8	↓-2.2
4/20 17:30	118.4	↓-2.4
4/20 17:40	115.8	↓-2.6
4/20 17:50	112.9	↓-2.9
4/20 18:00	109.9	↓-3.0
4/20 18:10	106.6	↓-3.3
4/20 18:20	103.3	↓-3.3
4/20 18:30	99.7	↓-3.6
4/20 18:40	96.1	↓-3.6
4/20 18:50	92.5	↓-3.6
4/20 19:00	88.8	↓-3.7
4/20 19:10	85.2	↓-3.6
4/20 19:20	81.6	↓-3.6
4/20 19:30	78.1	↓-3.5
4/20 19:40	74.8	↓-3.3
4/20 19:50	71.7	↓-3.1
4/20 20:00	68.9	↓-2.8
4/20 20:10	66.3	↓-2.6
4/20 20:20	64.0	↓-2.3
4/20 20:30	62.0	↓-2.0
4/20 20:40	60.3	↓-1.7
4/20 20:50	59.0	↓-1.3
4/20 21:00	58.1	↓-0.9
4/20 21:10	57.5	↓-0.6
4/20 21:20	57.2	↓-0.3	干潮
4/20 21:30	57.2	0
4/20 21:40	57.5	↑0.3
4/20 21:50	58.1	↑0.6
4/20 22:00	59.0	↑0.9
4/20 22:10	60.1	↑1.1
4/20 22:20	61.4	↑1.3
4/20 22:30	63.0	↑1.6
4/20 22:40	64.8	↑1.8
4/20 22:50	66.7	↑1.9
4/20 23:00	68.9	↑2.2
4/20 23:10	71.3	↑2.4
4/20 23:20	73.8	↑2.5
4/20 23:30	76.5	↑2.7
4/20 23:40	79.4	↑2.9
4/20 23:50	82.5	↑3.1