20 (月)	04:50	12:35	19:02	22:08
	105cm	13cm	53cm	48cm
中潮 出 04:30 入 18:12 出 07:28 入 22:43 潮干狩り ○ 10:42～14:42

コイセボイ（北海道）2037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	56.5	↑1.5
4/20 00:10	58.2	↑1.7
4/20 00:20	59.9	↑1.7
4/20 00:30	61.8	↑1.9
4/20 00:40	63.7	↑1.9
4/20 00:50	65.7	↑2.0
4/20 01:00	67.8	↑2.1
4/20 01:10	70.0	↑2.2
4/20 01:20	72.2	↑2.2
4/20 01:30	74.4	↑2.2
4/20 01:40	76.6	↑2.2
4/20 01:50	78.9	↑2.3
4/20 02:00	81.1	↑2.2
4/20 02:10	83.3	↑2.2
4/20 02:20	85.5	↑2.2
4/20 02:30	87.6	↑2.1
4/20 02:40	89.7	↑2.1
4/20 02:50	91.7	↑2.0
4/20 03:00	93.5	↑1.8
4/20 03:10	95.3	↑1.8
4/20 03:20	97.0	↑1.7
4/20 03:30	98.5	↑1.5
4/20 03:40	99.8	↑1.3
4/20 03:50	101.0	↑1.2
4/20 04:00	102.1	↑1.1
4/20 04:10	102.9	↑0.8
4/20 04:20	103.6	↑0.7
4/20 04:30	104.1	↑0.5
4/20 04:40	104.4	↑0.3	満潮
4/20 04:50	104.5	↑0.1	満潮
4/20 05:00	104.4	↓-0.1
4/20 05:10	104.0	↓-0.4
4/20 05:20	103.5	↓-0.5
4/20 05:30	102.8	↓-0.7
4/20 05:40	101.8	↓-1.0
4/20 05:50	100.7	↓-1.1
4/20 06:00	99.3	↓-1.4
4/20 06:10	97.8	↓-1.5
4/20 06:20	96.1	↓-1.7
4/20 06:30	94.2	↓-1.9
4/20 06:40	92.1	↓-2.1
4/20 06:50	89.8	↓-2.3
4/20 07:00	87.4	↓-2.4
4/20 07:10	84.9	↓-2.5
4/20 07:20	82.2	↓-2.7
4/20 07:30	79.5	↓-2.7
4/20 07:40	76.6	↓-2.9
4/20 07:50	73.6	↓-3.0
4/20 08:00	70.6	↓-3.0
4/20 08:10	67.5	↓-3.1
4/20 08:20	64.4	↓-3.1
4/20 08:30	61.2	↓-3.2	最大潮位差
4/20 08:40	58.1	↓-3.1
4/20 08:50	54.9	↓-3.2	最大潮位差
4/20 09:00	51.8	↓-3.1
4/20 09:10	48.7	↓-3.1
4/20 09:20	45.6	↓-3.1
4/20 09:30	42.7	↓-2.9
4/20 09:40	39.8	↓-2.9
4/20 09:50	37.0	↓-2.8
4/20 10:00	34.3	↓-2.7
4/20 10:10	31.7	↓-2.6
4/20 10:20	29.3	↓-2.4
4/20 10:30	27.0	↓-2.3
4/20 10:40	24.8	↓-2.2
4/20 10:50	22.9	↓-1.9
4/20 11:00	21.0	↓-1.9
4/20 11:10	19.4	↓-1.6
4/20 11:20	17.9	↓-1.5
4/20 11:30	16.7	↓-1.2
4/20 11:40	15.6	↓-1.1
4/20 11:50	14.7	↓-0.9
4/20 12:00	13.9	↓-0.8
4/20 12:10	13.4	↓-0.5
4/20 12:20	13.1	↓-0.3
4/20 12:30	12.9	↓-0.2	干潮
4/20 12:40	12.9	0
4/20 12:50	13.1	↑0.2
4/20 13:00	13.4	↑0.3
4/20 13:10	14.0	↑0.6
4/20 13:20	14.6	↑0.6
4/20 13:30	15.4	↑0.8
4/20 13:40	16.4	↑1.0
4/20 13:50	17.4	↑1.0
4/20 14:00	18.6	↑1.2
4/20 14:10	19.9	↑1.3
4/20 14:20	21.2	↑1.3
4/20 14:30	22.7	↑1.5
4/20 14:40	24.2	↑1.5
4/20 14:50	25.7	↑1.5
4/20 15:00	27.3	↑1.6
4/20 15:10	28.9	↑1.6
4/20 15:20	30.6	↑1.7
4/20 15:30	32.2	↑1.6
4/20 15:40	33.9	↑1.7
4/20 15:50	35.5	↑1.6
4/20 16:00	37.0	↑1.5
4/20 16:10	38.6	↑1.6
4/20 16:20	40.1	↑1.5
4/20 16:30	41.5	↑1.4
4/20 16:40	42.9	↑1.4
4/20 16:50	44.2	↑1.3
4/20 17:00	45.4	↑1.2
4/20 17:10	46.5	↑1.1
4/20 17:20	47.5	↑1.0
4/20 17:30	48.4	↑0.9
4/20 17:40	49.3	↑0.9
4/20 17:50	50.0	↑0.7
4/20 18:00	50.6	↑0.6
4/20 18:10	51.1	↑0.5
4/20 18:20	51.6	↑0.5
4/20 18:30	51.9	↑0.3
4/20 18:40	52.1	↑0.2
4/20 18:50	52.3	↑0.2
4/20 19:00	52.3	0	満潮
4/20 19:10	52.3	0
4/20 19:20	52.2	↓-0.1
4/20 19:30	52.0	↓-0.2
4/20 19:40	51.8	↓-0.2
4/20 19:50	51.5	↓-0.3
4/20 20:00	51.1	↓-0.4
4/20 20:10	50.8	↓-0.3
4/20 20:20	50.4	↓-0.4
4/20 20:30	50.0	↓-0.4
4/20 20:40	49.6	↓-0.4
4/20 20:50	49.2	↓-0.4
4/20 21:00	48.8	↓-0.4
4/20 21:10	48.4	↓-0.4
4/20 21:20	48.1	↓-0.3
4/20 21:30	47.8	↓-0.3
4/20 21:40	47.6	↓-0.2
4/20 21:50	47.4	↓-0.2
4/20 22:00	47.3	↓-0.1	干潮
4/20 22:10	47.3	0
4/20 22:20	47.4	↑0.1
4/20 22:30	47.5	↑0.1
4/20 22:40	47.8	↑0.3
4/20 22:50	48.1	↑0.3
4/20 23:00	48.6	↑0.5
4/20 23:10	49.2	↑0.6
4/20 23:20	49.9	↑0.7
4/20 23:30	50.7	↑0.8
4/20 23:40	51.6	↑0.9
4/20 23:50	52.6	↑1.0