Tides Today & Tomorrow in Vaca Key, Florida Bay, FL

TIDE TIMES for Monday, September 21, 2026
The tide is currently rising in Vaca Key, Florida Bay, FL.

Next low tide : 3:48 pm (0.4 ft)
Next high tide : in 2h 05m at 8:50 am (1.2 ft)
Sunset today : 7:22 pm
Sunrise tomorrow : 7:12 am
Moon phase : Waxing Gibbous (75% illuminated)
Tide Station Location : Station #8723970
Common Questions About Tides

Vaca Key, Florida Bay, FL Tides - Sep 2026

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Date		High Tide				Low Tide				Sun		Moon	Date
Date		AM	ft	PM	ft	AM	ft	PM	ft	Rise	Set	Moon	Date
1	Tue	4:33	1.2	6:00	0.9	10:11	0.2	10:07	0.7	7:05	7:43		1	Tue
2	Wed	5:06	1.2	8:28	0.8	11:07	0.1	10:39	0.7	7:05	7:42		2	Wed
3	Thu	5:41	1.3					12:05	0.1	7:06	7:41		3	Thu
4	Fri	6:22	1.3					1:08	0.1	7:06	7:40		4	Fri
5	Sat	7:10	1.3					2:16	0.1	7:07	7:39		5	Sat
6	Sun	8:08	1.3					7:10	0.2	7:07	7:37		6	Sun
7	Mon	9:14	1.3					8:10	0.3	7:07	7:36		7	Mon
8	Tue	10:27	1.3					9:04	0.4	7:08	7:35		8	Tue
9	Wed	2:35	0.9	12:07	1.3	4:48	0.8	6:09	0.6	7:08	7:34		9	Wed
10	Thu	3:02	1.0	2:16	1.3	5:50	0.7	6:44	0.7	7:08	7:33		10	Thu
11	Fri	3:25	1.1	3:20	1.3	6:46	0.7	7:19	0.8	7:09	7:32		11	Fri
12	Sat	3:38	1.1	4:14	1.2	7:37	0.6	7:55	0.8	7:09	7:31		12	Sat
13	Sun	3:20	1.2	5:05	1.2	8:27	0.5	8:32	0.8	7:09	7:30		13	Sun
14	Mon	3:32	1.3	5:57	1.0	9:17	0.4	9:09	0.8	7:10	7:29		14	Mon
15	Tue	4:04	1.3	6:57	0.9	10:07	0.3	9:47	0.8	7:10	7:28		15	Tue
16	Wed	4:43	1.3	8:19	0.8	10:57	0.2	10:24	0.8	7:10	7:27		16	Wed
17	Thu	5:24	1.3			11:49	0.2			7:11	7:26		17	Thu
18	Fri	6:09	1.3					12:44	0.2	7:11	7:25		18	Fri
19	Sat	6:58	1.2					1:42	0.2	7:12	7:24		19	Sat
20	Sun	7:51	1.2					2:45	0.3	7:12	7:23		20	Sun
21	Mon	8:50	1.2					3:48	0.4	7:12	7:22		21	Mon
22	Tue	9:54	1.2					4:42	0.5	7:13	7:20		22	Tue
23	Wed	1:58	1.0	11:05 AM	1.2	4:26	0.9	5:23	0.6	7:13	7:19		23	Wed
24	Thu	2:23	1.1	12:39	1.2	5:15	0.9	5:58	0.7	7:13	7:18		24	Thu
25	Fri	2:40	1.1	2:18	1.3	5:59	0.8	6:32	0.8	7:14	7:17		25	Fri
26	Sat	2:23	1.1	3:19	1.3	6:42	0.7	7:06	0.9	7:14	7:16		26	Sat
27	Sun	2:09	1.2	4:14	1.3	7:27	0.6	7:41	1.0	7:14	7:15		27	Sun
28	Mon	2:34	1.3	5:09	1.2	8:14	0.4	8:16	1.0	7:15	7:14		28	Mon
29	Tue	3:07	1.4	6:10	1.1	9:02	0.3	8:50	1.0	7:15	7:13		29	Tue
30	Wed	3:44	1.4			9:53	0.2			7:16	7:12		30	Wed
Date		High Tide				Low Tide				Sun		Moon	Date
Date		AM	ft	PM	ft	AM	ft	PM	ft	Rise	Set	Moon	Date

Tidal Data Source: (8723970)

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When is the lowest tide this week in Vaca Key, Florida Bay, FL?

The lowest tide this week in Vaca Key, Florida Bay, FL is 0.4 ft on Monday, Sep 21 at 3:48 pm.

When is the highest tide this week in Vaca Key, Florida Bay, FL?

The highest tide this week in Vaca Key, Florida Bay, FL is 1.3 ft on Saturday, Sep 26 at 3:19 pm — worth noting for launching your boat and being alert for possible high tide flooding.

Is this week a spring tide or neap tide in Vaca Key, Florida Bay, FL?

Vaca Key, Florida Bay, FL is currently in a transitional phase. Tonight's moon is 75% illuminated. Spring tides (largest swings) occur near new and full moons; neap tides (smallest swings) occur near first and third quarter moons. Tidal ranges this week are shifting between spring and neap.

What datum are Vaca Key, Florida Bay, FL tide heights measured from?

Tide heights on this page are measured from Mean Lower Low Water (MLLW), the U.S. NOAA standard. A height of 0 ft represents the 19-year average of each day's lower low tide. Negative values indicate a "minus tide" — water levels below that long-term reference.

What factors can affect the tide predictions for Vaca Key, Florida Bay, FL?

Tide predictions for Vaca Key, Florida Bay, FL come from NOAA's harmonic analysis and are typically accurate within about ±10 minutes on timing and ±0.5 ft on height. Actual water levels can deviate further due to sustained winds, atmospheric pressure changes, river flow, and storm surge. During major weather events, be sure to check US Harbors weather pages for factors that could impact tidal predictions.

Which NOAA station provides tide data for Vaca Key, Florida Bay, FL?

Tide data for Vaca Key, Florida Bay, FL is sourced from NOAA Station #8723970. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8723970.

What time is high tide in Vaca Key, Florida Bay, FL today?

High tides in Vaca Key, Florida Bay, FL today: 8:50 am (1.2 ft).

What time is low tide in Vaca Key, Florida Bay, FL today?

Low tides in Vaca Key, Florida Bay, FL today: 3:48 pm (0.4 ft).

What is the tidal range in Vaca Key, Florida Bay, FL today?

Today's tidal range in Vaca Key, Florida Bay, FL is 0.8 ft — the difference between the day's highest and lowest water level. This month's average daily range is about 0.9 ft, so today's swing is typical.

What is the moon phase in Vaca Key, Florida Bay, FL tonight?

Tonight the moon over Vaca Key, Florida Bay, FL is Waxing Gibbous (75% illuminated). This places Vaca Key, Florida Bay, FL in a transitional tide cycle, so tidal ranges are shifting between spring and neap this week.

What type of tides does Vaca Key, Florida Bay, FL have — semi-diurnal, diurnal, or mixed?

Vaca Key, Florida Bay, FL has diurnal tides — one high tide and one low tide per day, roughly every 24 hours and 50 minutes.

US Harbors Tidal Data

The data in our tide charts, tide tables, and tide graphs is provided by NOAA and others. These predictions are derived mathematically from numerous inputs, including data from historical tide stations and nearby locations where sensors are actively recording. As shown in the tide graph at the top of this page, “Predicted” tides (blue) are what forecasting models expect to happen. “Observed” tides (red) are those recorded by local sensors in real time, overlaid on the predictions for direct comparison. We display Observed water levels for a select group of harbors including Portland, Maine, where a physical sensor monitors water levels in real time.

LEARN MORE ABOUT OUR TIDE DATA

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