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 5h 09m 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 - Feb 1943

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Mon7:450.56:581.21:22-0.212:430.18:077:10Waning Crescent1Mon
2Tue8:400.67:571.32:22-0.21:440.18:077:10Waning Crescent2Tue
3Wed9:260.78:531.43:14-0.32:410.08:067:11New Moon3Wed
4Thu10:090.79:461.44:02-0.33:350.08:067:12New Moon4Thu
5Fri10:490.810:371.44:46-0.34:27-0.18:057:13New Moon5Fri
6Sat11:280.911:271.35:29-0.25:19-0.18:057:13Waxing Crescent6Sat
7Sun12:070.96:11-0.26:12-0.18:047:14Waxing Crescent7Sun
8Mon12:161.212:461.06:53-0.17:08-0.18:047:15Waxing Crescent8Mon
9Tue1:051.01:261.07:35-0.18:09-0.18:037:15Waxing Crescent9Tue
10Wed1:570.82:101.08:190.09:150.08:027:16First Quarter10Wed
11Thu2:570.72:590.99:070.110:260.08:027:17First Quarter11Thu
12Fri4:160.53:590.910:000.111:380.08:017:17First Quarter12Fri
13Sat5:550.55:060.911:000.18:017:18First Quarter13Sat
14Sun7:140.56:110.912:47-0.112:030.18:007:18Waxing Gibbous14Sun
15Mon8:070.57:061.01:47-0.11:030.17:597:19Waxing Gibbous15Mon
16Tue8:440.67:531.02:36-0.11:550.17:587:20Waxing Gibbous16Tue
17Wed9:140.68:361.13:15-0.12:400.17:587:20Waxing Gibbous17Wed
18Thu9:420.79:151.13:49-0.13:200.07:577:21Full Moon18Thu
19Fri10:100.79:531.14:21-0.13:570.07:567:21Full Moon19Fri
20Sat10:390.810:311.14:50-0.14:320.07:557:22Full Moon20Sat
21Sun11:100.911:091.15:19-0.15:090.07:557:23Full Moon21Sun
22Mon11:400.911:481.05:48-0.15:48-0.17:547:23Waning Gibbous22Mon
23Tue12:121.06:18-0.16:31-0.17:537:24Waning Gibbous23Tue
24Wed12:300.912:451.06:490.07:20-0.17:527:24Waning Gibbous24Wed
25Thu1:160.81:211.07:240.08:17-0.17:517:25Waning Gibbous25Thu
26Fri2:100.72:041.08:050.19:24-0.17:517:25Third Quarter26Fri
27Sat3:230.63:001.08:550.110:39-0.17:507:26Third Quarter27Sat
28Sun4:590.54:141.09:590.111:54-0.17:497:26Third Quarter28Sun
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8724178)

Common Questions About Big Pine Key, Spanish Harbor, FL Tides

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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