21 (水)	00:47	01:25	07:12	16:35
	102cm	102cm	111cm	35cm
長潮 出 04:44 入 18:23 出 11:11 入 01:44

苫小牧（北海道）2021年04月21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
4/21 00:00	100.8	↑0.2
4/21 00:10	100.9	↑0.1
4/21 00:20	101.0	↑0.1
4/21 00:30	101.1	↑0.1
4/21 00:40	101.1	0	満潮
4/21 00:50	101.1	0
4/21 01:00	101.1	0
4/21 01:10	101.1	0
4/21 01:20	101.1	0	干潮
4/21 01:30	101.1	0
4/21 01:40	101.1	0
4/21 01:50	101.1	0
4/21 02:00	101.2	↑0.1
4/21 02:10	101.3	↑0.1
4/21 02:20	101.5	↑0.2
4/21 02:30	101.6	↑0.1
4/21 02:40	101.9	↑0.3
4/21 02:50	102.1	↑0.2
4/21 03:00	102.4	↑0.3
4/21 03:10	102.7	↑0.3
4/21 03:20	103.0	↑0.3
4/21 03:30	103.3	↑0.3
4/21 03:40	103.7	↑0.4
4/21 03:50	104.0	↑0.3
4/21 04:00	104.4	↑0.4
4/21 04:10	104.7	↑0.3
4/21 04:20	105.1	↑0.4
4/21 04:30	105.4	↑0.3
4/21 04:40	105.8	↑0.4
4/21 04:50	106.1	↑0.3
4/21 05:00	106.5	↑0.4
4/21 05:10	106.9	↑0.4
4/21 05:20	107.2	↑0.3
4/21 05:30	107.6	↑0.4
4/21 05:40	107.9	↑0.3
4/21 05:50	108.3	↑0.4
4/21 06:00	108.6	↑0.3
4/21 06:10	109.0	↑0.4
4/21 06:20	109.3	↑0.3
4/21 06:30	109.5	↑0.2
4/21 06:40	109.8	↑0.3
4/21 06:50	109.9	↑0.1
4/21 07:00	110.1	↑0.2
4/21 07:10	110.1	0	満潮
4/21 07:20	110.1	0
4/21 07:30	110.0	↓-0.1
4/21 07:40	109.7	↓-0.3
4/21 07:50	109.4	↓-0.3
4/21 08:00	109.0	↓-0.4
4/21 08:10	108.4	↓-0.6
4/21 08:20	107.8	↓-0.6
4/21 08:30	107.0	↓-0.8
4/21 08:40	106.1	↓-0.9
4/21 08:50	105.1	↓-1.0
4/21 09:00	104.0	↓-1.1
4/21 09:10	102.9	↓-1.1
4/21 09:20	101.6	↓-1.3
4/21 09:30	100.2	↓-1.4
4/21 09:40	98.8	↓-1.4
4/21 09:50	97.3	↓-1.5
4/21 10:00	95.7	↓-1.6
4/21 10:10	94.1	↓-1.6
4/21 10:20	92.5	↓-1.6
4/21 10:30	90.8	↓-1.7
4/21 10:40	89.0	↓-1.8
4/21 10:50	87.3	↓-1.7
4/21 11:00	85.4	↓-1.9
4/21 11:10	83.6	↓-1.8
4/21 11:20	81.7	↓-1.9
4/21 11:30	79.8	↓-1.9
4/21 11:40	77.9	↓-1.9
4/21 11:50	75.9	↓-2.0
4/21 12:00	73.9	↓-2.0
4/21 12:10	71.9	↓-2.0
4/21 12:20	69.8	↓-2.1
4/21 12:30	67.7	↓-2.1
4/21 12:40	65.7	↓-2.0
4/21 12:50	63.6	↓-2.1
4/21 13:00	61.5	↓-2.1
4/21 13:10	59.5	↓-2.0
4/21 13:20	57.4	↓-2.1
4/21 13:30	55.4	↓-2.0
4/21 13:40	53.5	↓-1.9
4/21 13:50	51.6	↓-1.9
4/21 14:00	49.8	↓-1.8
4/21 14:10	48.0	↓-1.8
4/21 14:20	46.3	↓-1.7
4/21 14:30	44.7	↓-1.6
4/21 14:40	43.2	↓-1.5
4/21 14:50	41.8	↓-1.4
4/21 15:00	40.5	↓-1.3
4/21 15:10	39.4	↓-1.1
4/21 15:20	38.3	↓-1.1
4/21 15:30	37.4	↓-0.9
4/21 15:40	36.6	↓-0.8
4/21 15:50	35.9	↓-0.7
4/21 16:00	35.3	↓-0.6
4/21 16:10	34.9	↓-0.4
4/21 16:20	34.7	↓-0.2
4/21 16:30	34.5	↓-0.2	干潮
4/21 16:40	34.6	↑0.1
4/21 16:50	34.7	↑0.1
4/21 17:00	35.0	↑0.3
4/21 17:10	35.5	↑0.5
4/21 17:20	36.1	↑0.6
4/21 17:30	36.9	↑0.8
4/21 17:40	37.8	↑0.9
4/21 17:50	38.9	↑1.1
4/21 18:00	40.2	↑1.3
4/21 18:10	41.5	↑1.3
4/21 18:20	43.0	↑1.5
4/21 18:30	44.7	↑1.7
4/21 18:40	46.4	↑1.7
4/21 18:50	48.3	↑1.9
4/21 19:00	50.3	↑2.0
4/21 19:10	52.3	↑2.0
4/21 19:20	54.5	↑2.2
4/21 19:30	56.6	↑2.1
4/21 19:40	58.9	↑2.3	最大潮位差
4/21 19:50	61.1	↑2.2
4/21 20:00	63.4	↑2.3	最大潮位差
4/21 20:10	65.7	↑2.3	最大潮位差
4/21 20:20	67.9	↑2.2
4/21 20:30	70.2	↑2.3	最大潮位差
4/21 20:40	72.4	↑2.2
4/21 20:50	74.6	↑2.2
4/21 21:00	76.7	↑2.1
4/21 21:10	78.8	↑2.1
4/21 21:20	80.8	↑2.0
4/21 21:30	82.8	↑2.0
4/21 21:40	84.7	↑1.9
4/21 21:50	86.5	↑1.8
4/21 22:00	88.2	↑1.7
4/21 22:10	89.9	↑1.7
4/21 22:20	91.5	↑1.6
4/21 22:30	93.0	↑1.5
4/21 22:40	94.4	↑1.4
4/21 22:50	95.8	↑1.4
4/21 23:00	97.1	↑1.3
4/21 23:10	98.2	↑1.1
4/21 23:20	99.3	↑1.1
4/21 23:30	100.3	↑1.0
4/21 23:40	101.2	↑0.9
4/21 23:50	102.0	↑0.8