20 (日)	04:27	10:45	17:11	23:04
	110cm	24cm	117cm	44cm
大潮 出 05:07 入 18:10 出 03:52 入 16:50 潮干狩り ○ 09:41～11:49

鳥島（東京）2031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	51.6	↑2.0
4/20 00:10	53.8	↑2.2
4/20 00:20	56.1	↑2.3
4/20 00:30	58.7	↑2.6
4/20 00:40	61.3	↑2.6
4/20 00:50	64.1	↑2.8
4/20 01:00	66.9	↑2.8
4/20 01:10	69.8	↑2.9
4/20 01:20	72.8	↑3.0
4/20 01:30	75.8	↑3.0
4/20 01:40	78.8	↑3.0
4/20 01:50	81.8	↑3.0
4/20 02:00	84.7	↑2.9
4/20 02:10	87.6	↑2.9
4/20 02:20	90.4	↑2.8
4/20 02:30	93.0	↑2.6
4/20 02:40	95.6	↑2.6
4/20 02:50	97.9	↑2.3
4/20 03:00	100.1	↑2.2
4/20 03:10	102.2	↑2.1
4/20 03:20	104.0	↑1.8
4/20 03:30	105.5	↑1.5
4/20 03:40	106.9	↑1.4
4/20 03:50	108.0	↑1.1
4/20 04:00	108.8	↑0.8
4/20 04:10	109.4	↑0.6
4/20 04:20	109.7	↑0.3	満潮
4/20 04:30	109.7	0
4/20 04:40	109.4	↓-0.3
4/20 04:50	108.9	↓-0.5
4/20 05:00	108.1	↓-0.8
4/20 05:10	107.0	↓-1.1
4/20 05:20	105.6	↓-1.4
4/20 05:30	104.0	↓-1.6
4/20 05:40	102.1	↓-1.9
4/20 05:50	100.0	↓-2.1
4/20 06:00	97.6	↓-2.4
4/20 06:10	95.0	↓-2.6
4/20 06:20	92.3	↓-2.7
4/20 06:30	89.3	↓-3.0
4/20 06:40	86.2	↓-3.1
4/20 06:50	83.0	↓-3.2
4/20 07:00	79.6	↓-3.4
4/20 07:10	76.2	↓-3.4
4/20 07:20	72.6	↓-3.6
4/20 07:30	69.1	↓-3.5
4/20 07:40	65.5	↓-3.6
4/20 07:50	61.9	↓-3.6
4/20 08:00	58.3	↓-3.6
4/20 08:10	54.8	↓-3.5
4/20 08:20	51.4	↓-3.4
4/20 08:30	48.1	↓-3.3
4/20 08:40	44.9	↓-3.2
4/20 08:50	41.8	↓-3.1
4/20 09:00	39.0	↓-2.8
4/20 09:10	36.3	↓-2.7
4/20 09:20	33.8	↓-2.5
4/20 09:30	31.6	↓-2.2
4/20 09:40	29.6	↓-2.0
4/20 09:50	27.8	↓-1.8
4/20 10:00	26.3	↓-1.5
4/20 10:10	25.2	↓-1.1
4/20 10:20	24.3	↓-0.9
4/20 10:30	23.7	↓-0.6
4/20 10:40	23.4	↓-0.3	干潮
4/20 10:50	23.4	0
4/20 11:00	23.7	↑0.3
4/20 11:10	24.3	↑0.6
4/20 11:20	25.3	↑1.0
4/20 11:30	26.5	↑1.2
4/20 11:40	28.0	↑1.5
4/20 11:50	29.8	↑1.8
4/20 12:00	31.9	↑2.1
4/20 12:10	34.2	↑2.3
4/20 12:20	36.8	↑2.6
4/20 12:30	39.6	↑2.8
4/20 12:40	42.6	↑3.0
4/20 12:50	45.7	↑3.1
4/20 13:00	49.1	↑3.4
4/20 13:10	52.5	↑3.4
4/20 13:20	56.1	↑3.6
4/20 13:30	59.8	↑3.7
4/20 13:40	63.5	↑3.7
4/20 13:50	67.3	↑3.8	最大潮位差
4/20 14:00	71.1	↑3.8	最大潮位差
4/20 14:10	74.9	↑3.8	最大潮位差
4/20 14:20	78.7	↑3.8	最大潮位差
4/20 14:30	82.4	↑3.7
4/20 14:40	86.0	↑3.6
4/20 14:50	89.5	↑3.5
4/20 15:00	92.9	↑3.4
4/20 15:10	96.1	↑3.2
4/20 15:20	99.1	↑3.0
4/20 15:30	101.9	↑2.8
4/20 15:40	104.5	↑2.6
4/20 15:50	106.9	↑2.4
4/20 16:00	109.1	↑2.2
4/20 16:10	111.0	↑1.9
4/20 16:20	112.6	↑1.6
4/20 16:30	113.9	↑1.3
4/20 16:40	114.9	↑1.0
4/20 16:50	115.7	↑0.8
4/20 17:00	116.1	↑0.4
4/20 17:10	116.2	↑0.1	満潮
4/20 17:20	116.1	↓-0.1
4/20 17:30	115.6	↓-0.5
4/20 17:40	114.9	↓-0.7
4/20 17:50	113.9	↓-1.0
4/20 18:00	112.6	↓-1.3
4/20 18:10	111.0	↓-1.6
4/20 18:20	109.2	↓-1.8
4/20 18:30	107.2	↓-2.0
4/20 18:40	104.9	↓-2.3
4/20 18:50	102.5	↓-2.4
4/20 19:00	99.9	↓-2.6
4/20 19:10	97.1	↓-2.8
4/20 19:20	94.2	↓-2.9
4/20 19:30	91.2	↓-3.0
4/20 19:40	88.0	↓-3.2
4/20 19:50	84.9	↓-3.1
4/20 20:00	81.7	↓-3.2
4/20 20:10	78.5	↓-3.2
4/20 20:20	75.2	↓-3.3
4/20 20:30	72.1	↓-3.1
4/20 20:40	69.0	↓-3.1
4/20 20:50	66.0	↓-3.0
4/20 21:00	63.0	↓-3.0
4/20 21:10	60.3	↓-2.7
4/20 21:20	57.7	↓-2.6
4/20 21:30	55.2	↓-2.5
4/20 21:40	53.0	↓-2.2
4/20 21:50	50.9	↓-2.1
4/20 22:00	49.1	↓-1.8
4/20 22:10	47.5	↓-1.6
4/20 22:20	46.2	↓-1.3
4/20 22:30	45.2	↓-1.0
4/20 22:40	44.4	↓-0.8
4/20 22:50	43.9	↓-0.5
4/20 23:00	43.6	↓-0.3	干潮
4/20 23:10	43.7	↑0.1
4/20 23:20	44.0	↑0.3
4/20 23:30	44.7	↑0.7
4/20 23:40	45.6	↑0.9
4/20 23:50	46.7	↑1.1