Tides Today & Tomorrow in Big Pine Key, Spanish Harbor, FL

TIDE TIMES for Monday, August 17, 2026
The tide is currently falling in Big Pine Key, Spanish Harbor, FL.

Next low tide : in 58m at 7:37 am (0.1 ft)
Next high tide : 1:21 pm (1.1 ft)
Sunset today : 7:58 pm
Sunrise tomorrow : 7:00 am
Moon phase : Waxing Crescent (27% illuminated)
Tide Station Location : Station #8724178
Common Questions About Tides

Big Pine Key, Spanish Harbor, FL Tides - Sep 1942

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Oct 1942 >

Date		High Tide				Low Tide				Sun		Moon	Date
Date		AM	ft	PM	ft	AM	ft	PM	ft	Rise	Set	Moon	Date
1	Tue	1:49	1.4	2:40	1.0	9:09	0.2	8:46	0.3	7:06	7:44		1	Tue
2	Wed	2:36	1.4	3:51	0.9	10:16	0.2	9:40	0.4	7:06	7:43		2	Wed
3	Thu	3:34	1.4	5:23	0.9	11:25	0.2	10:42	0.4	7:06	7:42		3	Thu
4	Fri	4:40	1.3	6:41	0.9			12:30	0.2	7:07	7:41		4	Fri
5	Sat	5:46	1.4	7:31	1.0			1:26	0.2	7:07	7:40		5	Sat
6	Sun	6:44	1.4	8:07	1.1	12:45	0.4	2:12	0.2	7:08	7:39		6	Sun
7	Mon	7:33	1.5	8:39	1.1	1:36	0.4	2:50	0.2	7:08	7:38		7	Mon
8	Tue	8:18	1.6	9:11	1.2	2:21	0.3	3:24	0.2	7:08	7:37		8	Tue
9	Wed	9:01	1.6	9:43	1.3	3:02	0.3	3:55	0.2	7:09	7:36		9	Wed
10	Thu	9:43	1.6	10:15	1.4	3:41	0.3	4:25	0.2	7:09	7:35		10	Thu
11	Fri	10:26	1.6	10:49	1.5	4:21	0.2	4:56	0.2	7:09	7:34		11	Fri
12	Sat	11:09	1.6	11:24	1.5	5:03	0.2	5:28	0.2	7:10	7:33		12	Sat
13	Sun	11:54	1.5			5:48	0.2	6:02	0.2	7:10	7:32		13	Sun
14	Mon	12:00	1.6	12:42	1.4	6:38	0.1	6:39	0.3	7:10	7:31		14	Mon
15	Tue	12:40	1.6	1:36	1.2	7:34	0.1	7:21	0.3	7:11	7:30		15	Tue
16	Wed	1:26	1.6	2:40	1.1	8:38	0.2	8:11	0.4	7:11	7:28		16	Wed
17	Thu	2:22	1.6	4:02	1.0	9:51	0.2	9:15	0.4	7:11	7:27		17	Thu
18	Fri	3:32	1.6	5:30	1.0	11:06	0.2	10:31	0.4	7:12	7:26		18	Fri
19	Sat	4:52	1.6	6:40	1.1			12:16	0.2	7:12	7:25		19	Sat
20	Sun	6:08	1.6	7:33	1.2			1:18	0.2	7:13	7:24		20	Sun
21	Mon	7:14	1.7	8:16	1.3	12:57	0.3	2:10	0.2	7:13	7:23		21	Mon
22	Tue	8:11	1.7	8:55	1.4	1:58	0.3	2:55	0.2	7:13	7:22		22	Tue
23	Wed	9:02	1.7	9:31	1.5	2:52	0.2	3:34	0.2	7:14	7:21		23	Wed
24	Thu	9:50	1.7	10:05	1.6	3:42	0.2	4:12	0.2	7:14	7:20		24	Thu
25	Fri	10:33	1.6	10:39	1.6	4:28	0.2	4:47	0.2	7:14	7:19		25	Fri
26	Sat	11:15	1.6	11:12	1.7	5:13	0.2	5:23	0.3	7:15	7:18		26	Sat
27	Sun	11:55	1.5	11:46	1.6	5:57	0.2	5:58	0.3	7:15	7:17		27	Sun
28	Mon			12:36	1.3	6:43	0.2	6:34	0.4	7:15	7:16		28	Mon
29	Tue	12:21	1.6	1:19	1.2	7:33	0.2	7:11	0.4	7:16	7:15		29	Tue
30	Wed	12:59	1.6	2:08	1.1	8:28	0.3	7:52	0.4	7:16	7:14		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: (8724178)

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What time does the tide turn (slack tide) in Big Pine Key, Spanish Harbor, FL today?

Slack tide in Big Pine Key, Spanish Harbor, FL is approximately 10:29 am — midway between the next high and low tide, when tidal current is weakest. This is the preferred window for boat crossings, underwater visibility, and fishing in areas with strong currents.

Is this week a spring tide or neap tide in Big Pine Key, Spanish Harbor, FL?

Big Pine Key, Spanish Harbor, FL is currently in a transitional phase. Tonight's moon is 27% 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 Big Pine Key, Spanish Harbor, 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 Big Pine Key, Spanish Harbor, FL?

Tide predictions for Big Pine Key, Spanish Harbor, 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 Big Pine Key, Spanish Harbor, FL?

Tide data for Big Pine Key, Spanish Harbor, FL is sourced from NOAA Station #8724178. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8724178.

What is the moon phase in Big Pine Key, Spanish Harbor, FL tonight?

Tonight the moon over Big Pine Key, Spanish Harbor, FL is Waxing Crescent (27% illuminated). This places Big Pine Key, Spanish Harbor, FL in a transitional tide cycle, so tidal ranges are shifting between spring and neap this week.

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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