20 (金)	05:40	13:12	20:57	-
	129cm	19cm	100cm	-
小潮 出 04:46 入 18:22 出 08:47 入 - 潮干狩り ○ 11:26～15:16

苫小牧（北海道）2029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	88.0	0
4/20 00:10	88.2	↑0.2
4/20 00:20	88.6	↑0.4
4/20 00:30	89.2	↑0.6
4/20 00:40	89.9	↑0.7
4/20 00:50	90.9	↑1.0
4/20 01:00	91.9	↑1.0
4/20 01:10	93.2	↑1.3
4/20 01:20	94.5	↑1.3
4/20 01:30	95.9	↑1.4
4/20 01:40	97.4	↑1.5
4/20 01:50	98.9	↑1.5
4/20 02:00	100.5	↑1.6
4/20 02:10	102.0	↑1.5
4/20 02:20	103.6	↑1.6
4/20 02:30	105.2	↑1.6
4/20 02:40	106.8	↑1.6
4/20 02:50	108.4	↑1.6
4/20 03:00	109.9	↑1.5
4/20 03:10	111.5	↑1.6
4/20 03:20	113.0	↑1.5
4/20 03:30	114.6	↑1.6
4/20 03:40	116.1	↑1.5
4/20 03:50	117.6	↑1.5
4/20 04:00	119.1	↑1.5
4/20 04:10	120.5	↑1.4
4/20 04:20	121.9	↑1.4
4/20 04:30	123.2	↑1.3
4/20 04:40	124.5	↑1.3
4/20 04:50	125.6	↑1.1
4/20 05:00	126.5	↑0.9
4/20 05:10	127.3	↑0.8
4/20 05:20	127.9	↑0.6
4/20 05:30	128.3	↑0.4	満潮
4/20 05:40	128.4	↑0.1	満潮
4/20 05:50	128.2	↓-0.2
4/20 06:00	127.8	↓-0.4
4/20 06:10	127.1	↓-0.7
4/20 06:20	126.0	↓-1.1
4/20 06:30	124.7	↓-1.3
4/20 06:40	123.1	↓-1.6
4/20 06:50	121.2	↓-1.9
4/20 07:00	119.0	↓-2.2
4/20 07:10	116.6	↓-2.4
4/20 07:20	114.0	↓-2.6
4/20 07:30	111.2	↓-2.8
4/20 07:40	108.2	↓-3.0
4/20 07:50	105.2	↓-3.0
4/20 08:00	102.0	↓-3.2
4/20 08:10	98.7	↓-3.3
4/20 08:20	95.4	↓-3.3
4/20 08:30	92.0	↓-3.4
4/20 08:40	88.6	↓-3.4
4/20 08:50	85.1	↓-3.5	最大潮位差
4/20 09:00	81.7	↓-3.4
4/20 09:10	78.3	↓-3.4
4/20 09:20	74.8	↓-3.5	最大潮位差
4/20 09:30	71.4	↓-3.4
4/20 09:40	67.9	↓-3.5	最大潮位差
4/20 09:50	64.5	↓-3.4
4/20 10:00	61.0	↓-3.5	最大潮位差
4/20 10:10	57.6	↓-3.4
4/20 10:20	54.2	↓-3.4
4/20 10:30	50.8	↓-3.4
4/20 10:40	47.5	↓-3.3
4/20 10:50	44.3	↓-3.2
4/20 11:00	41.2	↓-3.1
4/20 11:10	38.1	↓-3.1
4/20 11:20	35.3	↓-2.8
4/20 11:30	32.5	↓-2.8
4/20 11:40	30.0	↓-2.5
4/20 11:50	27.7	↓-2.3
4/20 12:00	25.7	↓-2.0
4/20 12:10	23.9	↓-1.8
4/20 12:20	22.3	↓-1.6
4/20 12:30	21.1	↓-1.2
4/20 12:40	20.1	↓-1.0
4/20 12:50	19.4	↓-0.7
4/20 13:00	19.0	↓-0.4
4/20 13:10	18.8	↓-0.2	干潮
4/20 13:20	18.9	↑0.1
4/20 13:30	19.3	↑0.4
4/20 13:40	19.9	↑0.6
4/20 13:50	20.6	↑0.7
4/20 14:00	21.6	↑1.0
4/20 14:10	22.8	↑1.2
4/20 14:20	24.1	↑1.3
4/20 14:30	25.5	↑1.4
4/20 14:40	27.1	↑1.6
4/20 14:50	28.9	↑1.8
4/20 15:00	30.8	↑1.9
4/20 15:10	32.8	↑2.0
4/20 15:20	34.9	↑2.1
4/20 15:30	37.2	↑2.3
4/20 15:40	39.6	↑2.4
4/20 15:50	42.1	↑2.5
4/20 16:00	44.7	↑2.6
4/20 16:10	47.5	↑2.8
4/20 16:20	50.3	↑2.8
4/20 16:30	53.3	↑3.0
4/20 16:40	56.3	↑3.0
4/20 16:50	59.4	↑3.1
4/20 17:00	62.5	↑3.1
4/20 17:10	65.7	↑3.2
4/20 17:20	68.8	↑3.1
4/20 17:30	71.8	↑3.0
4/20 17:40	74.8	↑3.0
4/20 17:50	77.7	↑2.9
4/20 18:00	80.4	↑2.7
4/20 18:10	83.0	↑2.6
4/20 18:20	85.4	↑2.4
4/20 18:30	87.6	↑2.2
4/20 18:40	89.5	↑1.9
4/20 18:50	91.3	↑1.8
4/20 19:00	92.9	↑1.6
4/20 19:10	94.2	↑1.3
4/20 19:20	95.4	↑1.2
4/20 19:30	96.3	↑0.9
4/20 19:40	97.1	↑0.8
4/20 19:50	97.8	↑0.7
4/20 20:00	98.3	↑0.5
4/20 20:10	98.6	↑0.3
4/20 20:20	98.9	↑0.3
4/20 20:30	99.1	↑0.2
4/20 20:40	99.2	↑0.1
4/20 20:50	99.3	↑0.1	満潮
4/20 21:00	99.3	0
4/20 21:10	99.2	↓-0.1
4/20 21:20	99.2	0
4/20 21:30	99.0	↓-0.2
4/20 21:40	98.8	↓-0.2
4/20 21:50	98.6	↓-0.2
4/20 22:00	98.3	↓-0.3
4/20 22:10	97.9	↓-0.4
4/20 22:20	97.5	↓-0.4
4/20 22:30	97.1	↓-0.4
4/20 22:40	96.5	↓-0.6
4/20 22:50	96.0	↓-0.5
4/20 23:00	95.4	↓-0.6
4/20 23:10	94.8	↓-0.6
4/20 23:20	94.2	↓-0.6
4/20 23:30	93.6	↓-0.6
4/20 23:40	93.1	↓-0.5
4/20 23:50	92.6	↓-0.5