20 (木)	05:17	12:18	19:06	-
	129cm	17cm	110cm	-
中潮 出 04:45 入 18:22 出 07:58 入 23:10 潮干狩り ◎ 10:36～14:14

苫小牧（北海道）2056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	76.2	↑0.6
4/20 00:10	77.0	↑0.8
4/20 00:20	78.0	↑1.0
4/20 00:30	79.3	↑1.3
4/20 00:40	80.6	↑1.3
4/20 00:50	82.2	↑1.6
4/20 01:00	83.8	↑1.6
4/20 01:10	85.6	↑1.8
4/20 01:20	87.4	↑1.8
4/20 01:30	89.3	↑1.9
4/20 01:40	91.2	↑1.9
4/20 01:50	93.1	↑1.9
4/20 02:00	95.1	↑2.0
4/20 02:10	97.2	↑2.1
4/20 02:20	99.2	↑2.0
4/20 02:30	101.3	↑2.1
4/20 02:40	103.4	↑2.1
4/20 02:50	105.5	↑2.1
4/20 03:00	107.7	↑2.2
4/20 03:10	109.9	↑2.2
4/20 03:20	112.0	↑2.1
4/20 03:30	114.2	↑2.2
4/20 03:40	116.3	↑2.1
4/20 03:50	118.4	↑2.1
4/20 04:00	120.4	↑2.0
4/20 04:10	122.2	↑1.8
4/20 04:20	123.9	↑1.7
4/20 04:30	125.4	↑1.5
4/20 04:40	126.6	↑1.2
4/20 04:50	127.6	↑1.0
4/20 05:00	128.3	↑0.7
4/20 05:10	128.6	↑0.3	満潮
4/20 05:20	128.7	↑0.1
4/20 05:30	128.3	↓-0.4
4/20 05:40	127.6	↓-0.7
4/20 05:50	126.6	↓-1.0
4/20 06:00	125.2	↓-1.4
4/20 06:10	123.5	↓-1.7
4/20 06:20	121.4	↓-2.1
4/20 06:30	119.1	↓-2.3
4/20 06:40	116.5	↓-2.6
4/20 06:50	113.7	↓-2.8
4/20 07:00	110.7	↓-3.0
4/20 07:10	107.6	↓-3.1
4/20 07:20	104.3	↓-3.3
4/20 07:30	100.9	↓-3.4
4/20 07:40	97.5	↓-3.4
4/20 07:50	93.9	↓-3.6
4/20 08:00	90.4	↓-3.5
4/20 08:10	86.7	↓-3.7
4/20 08:20	83.1	↓-3.6
4/20 08:30	79.4	↓-3.7
4/20 08:40	75.7	↓-3.7
4/20 08:50	72.0	↓-3.7
4/20 09:00	68.3	↓-3.7
4/20 09:10	64.5	↓-3.8	最大潮位差
4/20 09:20	60.7	↓-3.8	最大潮位差
4/20 09:30	57.0	↓-3.7
4/20 09:40	53.2	↓-3.8	最大潮位差
4/20 09:50	49.5	↓-3.7
4/20 10:00	45.9	↓-3.6
4/20 10:10	42.3	↓-3.6
4/20 10:20	38.8	↓-3.5
4/20 10:30	35.5	↓-3.3
4/20 10:40	32.4	↓-3.1
4/20 10:50	29.5	↓-2.9
4/20 11:00	26.8	↓-2.7
4/20 11:10	24.4	↓-2.4
4/20 11:20	22.3	↓-2.1
4/20 11:30	20.5	↓-1.8
4/20 11:40	19.1	↓-1.4
4/20 11:50	18.0	↓-1.1
4/20 12:00	17.2	↓-0.8
4/20 12:10	16.8	↓-0.4	干潮
4/20 12:20	16.7	↓-0.1
4/20 12:30	17.0	↑0.3
4/20 12:40	17.6	↑0.6
4/20 12:50	18.4	↑0.8
4/20 13:00	19.5	↑1.1
4/20 13:10	20.8	↑1.3
4/20 13:20	22.4	↑1.6
4/20 13:30	24.2	↑1.8
4/20 13:40	26.1	↑1.9
4/20 13:50	28.2	↑2.1
4/20 14:00	30.4	↑2.2
4/20 14:10	32.8	↑2.4
4/20 14:20	35.4	↑2.6
4/20 14:30	38.0	↑2.6
4/20 14:40	40.8	↑2.8
4/20 14:50	43.8	↑3.0
4/20 15:00	46.8	↑3.0
4/20 15:10	50.0	↑3.2
4/20 15:20	53.4	↑3.4
4/20 15:30	56.8	↑3.4
4/20 15:40	60.3	↑3.5
4/20 15:50	63.9	↑3.6
4/20 16:00	67.6	↑3.7
4/20 16:10	71.3	↑3.7
4/20 16:20	75.0	↑3.7
4/20 16:30	78.6	↑3.6
4/20 16:40	82.2	↑3.6
4/20 16:50	85.7	↑3.5
4/20 17:00	89.0	↑3.3
4/20 17:10	92.2	↑3.2
4/20 17:20	95.1	↑2.9
4/20 17:30	97.7	↑2.6
4/20 17:40	100.1	↑2.4
4/20 17:50	102.3	↑2.2
4/20 18:00	104.1	↑1.8
4/20 18:10	105.6	↑1.5
4/20 18:20	106.9	↑1.3
4/20 18:30	107.8	↑0.9
4/20 18:40	108.5	↑0.7
4/20 18:50	108.9	↑0.4
4/20 19:00	109.1	↑0.2	満潮
4/20 19:10	109.1	0
4/20 19:20	108.9	↓-0.2
4/20 19:30	108.6	↓-0.3
4/20 19:40	108.1	↓-0.5
4/20 19:50	107.5	↓-0.6
4/20 20:00	106.9	↓-0.6
4/20 20:10	106.1	↓-0.8
4/20 20:20	105.3	↓-0.8
4/20 20:30	104.5	↓-0.8
4/20 20:40	103.6	↓-0.9
4/20 20:50	102.6	↓-1.0
4/20 21:00	101.6	↓-1.0
4/20 21:10	100.5	↓-1.1
4/20 21:20	99.3	↓-1.2
4/20 21:30	98.1	↓-1.2
4/20 21:40	96.8	↓-1.3
4/20 21:50	95.5	↓-1.3
4/20 22:00	94.2	↓-1.3
4/20 22:10	92.8	↓-1.4
4/20 22:20	91.4	↓-1.4
4/20 22:30	90.0	↓-1.4
4/20 22:40	88.7	↓-1.3
4/20 22:50	87.4	↓-1.3
4/20 23:00	86.2	↓-1.2
4/20 23:10	85.1	↓-1.1
4/20 23:20	84.2	↓-0.9
4/20 23:30	83.4	↓-0.8
4/20 23:40	82.8	↓-0.6
4/20 23:50	82.4	↓-0.4