Tides Today & Tomorrow in Barnstable Harbor, MA

TIDE TIMES for Monday, August 17, 2026
The tide is currently falling in Barnstable Harbor, MA.
Next low tide : in 5h 06m at 10:12 pm (0.4 ft)
Next high tide (tomorrow) : 4:07 am (9.5 ft)
Sunset today : 7:38 pm
Sunrise tomorrow : 5:51 am
Moon phase : Waxing Crescent (27% illuminated)
Tide Station Location : Station #8447335
Common Questions About Tides

Barnstable Harbor, MA Tides - Jun 1937

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue4:479.65:259.311:290.711:531.35:088:08Third Quarter1Tue
2Wed5:409.56:149.712:190.75:088:09Third Quarter2Wed
3Thu6:359.57:0610.112:491.11:110.65:078:10Third Quarter3Thu
4Fri7:339.58:0010.51:450.72:050.55:078:11Waning Crescent4Fri
5Sat8:329.78:5511.02:440.23:000.45:078:11Waning Crescent5Sat
6Sun9:329.99:5011.53:42-0.43:560.15:068:12Waning Crescent6Sun
7Mon10:2910.110:4411.94:39-0.94:52-0.15:068:13New Moon7Mon
8Tue11:2510.311:3912.15:34-1.35:46-0.35:068:13New Moon8Tue
9Wed12:2110.46:28-1.66:40-0.45:068:14New Moon9Wed
10Thu12:3312.11:1710.57:22-1.67:34-0.35:068:14Waxing Crescent10Thu
11Fri1:2911.92:1310.58:15-1.48:29-0.15:058:15Waxing Crescent11Fri
12Sat2:2411.63:0710.39:07-1.19:240.25:058:15Waxing Crescent12Sat
13Sun3:2011.14:0110.210:00-0.610:200.55:058:16Waxing Crescent13Sun
14Mon4:1610.54:5710.010:53-0.111:180.85:058:16First Quarter14Mon
15Tue5:159.95:529.811:480.55:058:17First Quarter15Tue
16Wed6:149.46:469.712:181.112:420.95:058:17First Quarter16Wed
17Thu7:128.97:399.61:171.21:351.35:058:17First Quarter17Thu
18Fri8:108.78:309.72:151.32:271.65:058:18Waxing Gibbous18Fri
19Sat9:068.69:209.73:121.23:181.75:068:18Waxing Gibbous19Sat
20Sun9:588.610:069.94:041.14:071.75:068:18Waxing Gibbous20Sun
21Mon10:448.610:4910.04:500.94:521.75:068:19Waxing Gibbous21Mon
22Tue11:278.711:2910.15:330.75:341.65:068:19Full Moon22Tue
23Wed12:088.96:130.56:151.55:068:19Full Moon23Wed
24Thu12:0910.212:489.06:520.46:561.45:078:19Full Moon24Thu
25Fri12:4810.21:279.17:310.37:371.35:078:19Full Moon25Fri
26Sat1:2810.32:069.28:090.28:191.25:078:19Waning Gibbous26Sat
27Sun2:0810.22:449.38:490.29:011.15:088:19Waning Gibbous27Sun
28Mon2:5010.23:249.59:290.29:461.05:088:19Waning Gibbous28Mon
29Tue3:3310.04:079.710:120.210:340.95:098:19Waning Gibbous29Tue
30Wed4:219.94:539.910:580.311:270.85:098:19Third Quarter30Wed
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8447335)

Common Questions About Barnstable Harbor, MA Tides

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What time does the tide turn (slack tide) in Barnstable Harbor, MA today?

Slack tide in Barnstable Harbor, MA is approximately 1:09 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 Barnstable Harbor, MA?

Barnstable Harbor, MA 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 Barnstable Harbor, MA 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 Barnstable Harbor, MA?

Tide predictions for Barnstable Harbor, MA 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 Barnstable Harbor, MA?

Tide data for Barnstable Harbor, MA is sourced from NOAA Station #8447335. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8447335.

What is the moon phase in Barnstable Harbor, MA tonight?

Tonight the moon over Barnstable Harbor, MA is Waxing Crescent (27% illuminated). This places Barnstable Harbor, MA 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