31 (金)	11:57	20:20	-	-
	116cm	25cm	-	-
中潮 出 06:56 入 15:53 出 03:46 入 13:17

コイセボイ（北海道）2021年12月31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
12/31 00:00	59.5	↑1.0
12/31 00:10	60.4	↑0.9
12/31 00:20	61.3	↑0.9
12/31 00:30	62.0	↑0.7
12/31 00:40	62.8	↑0.8
12/31 00:50	63.4	↑0.6
12/31 01:00	64.0	↑0.6
12/31 01:10	64.6	↑0.6
12/31 01:20	65.1	↑0.5
12/31 01:30	65.5	↑0.4
12/31 01:40	65.8	↑0.3
12/31 01:50	66.1	↑0.3
12/31 02:00	66.4	↑0.3
12/31 02:10	66.6	↑0.2
12/31 02:20	66.8	↑0.2
12/31 02:30	66.9	↑0.1
12/31 02:40	67.0	↑0.1
12/31 02:50	67.1	↑0.1
12/31 03:00	67.1	0
12/31 03:10	67.1	0
12/31 03:20	67.2	↑0.1
12/31 03:30	67.2	0
12/31 03:40	67.2	0
12/31 03:50	67.3	↑0.1
12/31 04:00	67.4	↑0.1
12/31 04:10	67.5	↑0.1
12/31 04:20	67.6	↑0.1
12/31 04:30	67.8	↑0.2
12/31 04:40	68.0	↑0.2
12/31 04:50	68.2	↑0.2
12/31 05:00	68.6	↑0.4
12/31 05:10	68.9	↑0.3
12/31 05:20	69.4	↑0.5
12/31 05:30	69.9	↑0.5
12/31 05:40	70.5	↑0.6
12/31 05:50	71.2	↑0.7
12/31 06:00	71.9	↑0.7
12/31 06:10	72.8	↑0.9
12/31 06:20	73.7	↑0.9
12/31 06:30	74.6	↑0.9
12/31 06:40	75.7	↑1.1
12/31 06:50	76.8	↑1.1
12/31 07:00	78.0	↑1.2
12/31 07:10	79.3	↑1.3
12/31 07:20	80.7	↑1.4
12/31 07:30	82.1	↑1.4
12/31 07:40	83.6	↑1.5
12/31 07:50	85.1	↑1.5
12/31 08:00	86.7	↑1.6
12/31 08:10	88.3	↑1.6
12/31 08:20	89.9	↑1.6
12/31 08:30	91.6	↑1.7
12/31 08:40	93.3	↑1.7
12/31 08:50	94.9	↑1.6
12/31 09:00	96.6	↑1.7
12/31 09:10	98.3	↑1.7
12/31 09:20	99.9	↑1.6
12/31 09:30	101.5	↑1.6
12/31 09:40	103.1	↑1.6
12/31 09:50	104.6	↑1.5
12/31 10:00	106.1	↑1.5
12/31 10:10	107.4	↑1.3
12/31 10:20	108.7	↑1.3
12/31 10:30	109.9	↑1.2
12/31 10:40	111.0	↑1.1
12/31 10:50	112.0	↑1.0
12/31 11:00	112.9	↑0.9
12/31 11:10	113.6	↑0.7
12/31 11:20	114.2	↑0.6
12/31 11:30	114.7	↑0.5
12/31 11:40	115.0	↑0.3
12/31 11:50	115.2	↑0.2	満潮
12/31 12:00	115.2	0
12/31 12:10	115.1	↓-0.1
12/31 12:20	114.8	↓-0.3
12/31 12:30	114.3	↓-0.5
12/31 12:40	113.6	↓-0.7
12/31 12:50	112.8	↓-0.8
12/31 13:00	111.9	↓-0.9
12/31 13:10	110.7	↓-1.2
12/31 13:20	109.4	↓-1.3
12/31 13:30	108.0	↓-1.4
12/31 13:40	106.4	↓-1.6
12/31 13:50	104.6	↓-1.8
12/31 14:00	102.7	↓-1.9
12/31 14:10	100.6	↓-2.1
12/31 14:20	98.5	↓-2.1
12/31 14:30	96.2	↓-2.3
12/31 14:40	93.8	↓-2.4
12/31 14:50	91.3	↓-2.5
12/31 15:00	88.7	↓-2.6
12/31 15:10	86.0	↓-2.7
12/31 15:20	83.3	↓-2.7
12/31 15:30	80.5	↓-2.8
12/31 15:40	77.6	↓-2.9
12/31 15:50	74.8	↓-2.8
12/31 16:00	71.9	↓-2.9
12/31 16:10	68.9	↓-3.0	最大潮位差
12/31 16:20	66.0	↓-2.9
12/31 16:30	63.2	↓-2.8
12/31 16:40	60.3	↓-2.9
12/31 16:50	57.5	↓-2.8
12/31 17:00	54.7	↓-2.8
12/31 17:10	52.1	↓-2.6
12/31 17:20	49.4	↓-2.7
12/31 17:30	46.9	↓-2.5
12/31 17:40	44.5	↓-2.4
12/31 17:50	42.2	↓-2.3
12/31 18:00	40.0	↓-2.2
12/31 18:10	37.9	↓-2.1
12/31 18:20	36.0	↓-1.9
12/31 18:30	34.2	↓-1.8
12/31 18:40	32.5	↓-1.7
12/31 18:50	31.0	↓-1.5
12/31 19:00	29.7	↓-1.3
12/31 19:10	28.5	↓-1.2
12/31 19:20	27.4	↓-1.1
12/31 19:30	26.6	↓-0.8
12/31 19:40	25.9	↓-0.7
12/31 19:50	25.3	↓-0.6
12/31 20:00	25.0	↓-0.3
12/31 20:10	24.8	↓-0.2	干潮
12/31 20:20	24.7	↓-0.1	干潮
12/31 20:30	24.8	↑0.1
12/31 20:40	25.1	↑0.3
12/31 20:50	25.4	↑0.3
12/31 21:00	26.0	↑0.6
12/31 21:10	26.6	↑0.6
12/31 21:20	27.4	↑0.8
12/31 21:30	28.3	↑0.9
12/31 21:40	29.3	↑1.0
12/31 21:50	30.4	↑1.1
12/31 22:00	31.6	↑1.2
12/31 22:10	32.9	↑1.3
12/31 22:20	34.2	↑1.3
12/31 22:30	35.6	↑1.4
12/31 22:40	37.0	↑1.4
12/31 22:50	38.5	↑1.5
12/31 23:00	40.0	↑1.5
12/31 23:10	41.6	↑1.6
12/31 23:20	43.1	↑1.5
12/31 23:30	44.6	↑1.5
12/31 23:40	46.2	↑1.6
12/31 23:50	47.7	↑1.5