20 (火)	03:16	09:50	16:21	22:00
	135cm	13cm	133cm	53cm
大潮 出 04:46 入 18:22 出 19:21 入 05:27 潮干狩り ◎ 08:06～11:45

苫小牧（北海道）2038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	75.6	↑3.7
4/20 00:10	79.5	↑3.9
4/20 00:20	83.5	↑4.0
4/20 00:30	87.7	↑4.2
4/20 00:40	91.9	↑4.2
4/20 00:50	96.1	↑4.2
4/20 01:00	100.4	↑4.3
4/20 01:10	104.6	↑4.2
4/20 01:20	108.7	↑4.1
4/20 01:30	112.6	↑3.9
4/20 01:40	116.3	↑3.7
4/20 01:50	119.7	↑3.4
4/20 02:00	122.9	↑3.2
4/20 02:10	125.7	↑2.8
4/20 02:20	128.1	↑2.4
4/20 02:30	130.2	↑2.1
4/20 02:40	131.8	↑1.6
4/20 02:50	133.1	↑1.3
4/20 03:00	133.9	↑0.8
4/20 03:10	134.2	↑0.3	満潮
4/20 03:20	134.2	0
4/20 03:30	133.8	↓-0.4
4/20 03:40	133.1	↓-0.7
4/20 03:50	131.9	↓-1.2
4/20 04:00	130.5	↓-1.4
4/20 04:10	128.8	↓-1.7
4/20 04:20	126.7	↓-2.1
4/20 04:30	124.5	↓-2.2
4/20 04:40	121.9	↓-2.6
4/20 04:50	119.1	↓-2.8
4/20 05:00	116.1	↓-3.0
4/20 05:10	112.9	↓-3.2
4/20 05:20	109.5	↓-3.4
4/20 05:30	105.8	↓-3.7
4/20 05:40	101.9	↓-3.9
4/20 05:50	97.8	↓-4.1
4/20 06:00	93.5	↓-4.3
4/20 06:10	89.1	↓-4.4
4/20 06:20	84.4	↓-4.7
4/20 06:30	79.6	↓-4.8
4/20 06:40	74.7	↓-4.9
4/20 06:50	69.7	↓-5.0
4/20 07:00	64.7	↓-5.0
4/20 07:10	59.7	↓-5.0
4/20 07:20	54.7	↓-5.0
4/20 07:30	49.8	↓-4.9
4/20 07:40	45.0	↓-4.8
4/20 07:50	40.4	↓-4.6
4/20 08:00	36.1	↓-4.3
4/20 08:10	32.1	↓-4.0
4/20 08:20	28.4	↓-3.7
4/20 08:30	25.0	↓-3.4
4/20 08:40	22.0	↓-3.0
4/20 08:50	19.5	↓-2.5
4/20 09:00	17.3	↓-2.2
4/20 09:10	15.5	↓-1.8
4/20 09:20	14.2	↓-1.3
4/20 09:30	13.3	↓-0.9
4/20 09:40	12.8	↓-0.5	干潮
4/20 09:50	12.6	↓-0.2	干潮
4/20 10:00	12.9	↑0.3
4/20 10:10	13.4	↑0.5
4/20 10:20	14.4	↑1.0
4/20 10:30	15.6	↑1.2
4/20 10:40	17.1	↑1.5
4/20 10:50	18.9	↑1.8
4/20 11:00	21.1	↑2.2
4/20 11:10	23.5	↑2.4
4/20 11:20	26.1	↑2.6
4/20 11:30	29.1	↑3.0
4/20 11:40	32.3	↑3.2
4/20 11:50	35.8	↑3.5
4/20 12:00	39.6	↑3.8
4/20 12:10	43.7	↑4.1
4/20 12:20	47.9	↑4.2
4/20 12:30	52.5	↑4.6
4/20 12:40	57.2	↑4.7
4/20 12:50	62.1	↑4.9
4/20 13:00	67.2	↑5.1
4/20 13:10	72.4	↑5.2	最大潮位差
4/20 13:20	77.6	↑5.2	最大潮位差
4/20 13:30	82.8	↑5.2	最大潮位差
4/20 13:40	88.0	↑5.2	最大潮位差
4/20 13:50	93.0	↑5.0
4/20 14:00	98.0	↑5.0
4/20 14:10	102.7	↑4.7
4/20 14:20	107.1	↑4.4
4/20 14:30	111.3	↑4.2
4/20 14:40	115.1	↑3.8
4/20 14:50	118.6	↑3.5
4/20 15:00	121.7	↑3.1
4/20 15:10	124.4	↑2.7
4/20 15:20	126.7	↑2.3
4/20 15:30	128.6	↑1.9
4/20 15:40	130.1	↑1.5
4/20 15:50	131.3	↑1.2
4/20 16:00	132.1	↑0.8
4/20 16:10	132.5	↑0.4
4/20 16:20	132.7	↑0.2	満潮
4/20 16:30	132.5	↓-0.2
4/20 16:40	132.1	↓-0.4
4/20 16:50	131.4	↓-0.7
4/20 17:00	130.4	↓-1.0
4/20 17:10	129.2	↓-1.2
4/20 17:20	127.8	↓-1.4
4/20 17:30	126.1	↓-1.7
4/20 17:40	124.1	↓-2.0
4/20 17:50	122.0	↓-2.1
4/20 18:00	119.6	↓-2.4
4/20 18:10	116.9	↓-2.7
4/20 18:20	114.0	↓-2.9
4/20 18:30	110.9	↓-3.1
4/20 18:40	107.6	↓-3.3
4/20 18:50	104.1	↓-3.5
4/20 19:00	100.5	↓-3.6
4/20 19:10	96.7	↓-3.8
4/20 19:20	92.8	↓-3.9
4/20 19:30	88.9	↓-3.9
4/20 19:40	84.9	↓-4.0
4/20 19:50	81.0	↓-3.9
4/20 20:00	77.2	↓-3.8
4/20 20:10	73.6	↓-3.6
4/20 20:20	70.1	↓-3.5
4/20 20:30	66.9	↓-3.2
4/20 20:40	64.0	↓-2.9
4/20 20:50	61.4	↓-2.6
4/20 21:00	59.1	↓-2.3
4/20 21:10	57.1	↓-2.0
4/20 21:20	55.6	↓-1.5
4/20 21:30	54.4	↓-1.2
4/20 21:40	53.5	↓-0.9
4/20 21:50	53.1	↓-0.4	干潮
4/20 22:00	52.9	↓-0.2	干潮
4/20 22:10	53.1	↑0.2
4/20 22:20	53.7	↑0.6
4/20 22:30	54.5	↑0.8
4/20 22:40	55.6	↑1.1
4/20 22:50	56.9	↑1.3
4/20 23:00	58.5	↑1.6
4/20 23:10	60.3	↑1.8
4/20 23:20	62.3	↑2.0
4/20 23:30	64.6	↑2.3
4/20 23:40	67.0	↑2.4
4/20 23:50	69.7	↑2.7