Tides Today & Tomorrow in Barnstable Harbor, MA

TIDE TIMES for Tuesday, August 18, 2026
The tide is currently rising in Barnstable Harbor, MA.
Next low tide (tomorrow) : 11:18 am (1.5 ft)
Next high tide (tomorrow) : in 5h 27m at 4:59 am (8.9 ft)
Sunset today : 7:36 pm
Sunrise tomorrow : 5:52 am
Moon phase : First Quarter (36% illuminated)
Tide Station Location : Station #8447335
Common Questions About Tides

Barnstable Harbor, MA Tides - Jun 1934

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Fri2:1911.53:049.99:07-1.09:210.45:088:08Waning Gibbous1Fri
2Sat3:1511.24:019.910:01-0.710:200.55:088:09Waning Gibbous2Sat
3Sun4:1410.85:009.910:58-0.411:210.75:088:10Third Quarter3Sun
4Mon5:1610.35:5910.011:550.05:078:10Third Quarter4Mon
5Tue6:209.96:5810.112:250.712:530.35:078:11Third Quarter5Tue
6Wed7:249.57:5610.21:280.71:500.75:078:12Waning Crescent6Wed
7Thu8:279.38:5110.32:310.62:470.95:068:12Waning Crescent7Thu
8Fri9:289.29:4410.43:310.53:411.15:068:13Waning Crescent8Fri
9Sat10:239.110:3110.44:270.34:321.25:068:14Waning Crescent9Sat
10Sun11:129.111:1510.45:170.25:191.35:068:14New Moon10Sun
11Mon11:579.011:5710.36:020.26:031.45:058:15New Moon11Mon
12Tue12:398.96:440.26:451.55:058:15New Moon12Tue
13Wed12:3910.31:218.97:250.37:271.55:058:16New Moon13Wed
14Thu1:2010.22:018.98:050.48:091.65:058:16Waxing Crescent14Thu
15Fri2:0110.02:418.88:450.58:511.75:058:17Waxing Crescent15Fri
16Sat2:429.83:228.89:250.79:341.85:058:17Waxing Crescent16Sat
17Sun3:259.64:038.910:050.910:191.85:058:17Waxing Crescent17Sun
18Mon4:099.44:468.910:481.011:071.85:058:18First Quarter18Mon
19Tue4:559.15:309.111:321.211:571.85:058:18First Quarter19Tue
20Wed5:458.96:159.312:181.35:068:18First Quarter20Wed
21Thu6:368.77:029.512:491.61:061.45:068:19First Quarter21Thu
22Fri7:298.77:519.91:421.31:551.45:068:19Waxing Gibbous22Fri
23Sat8:258.78:4210.32:371.02:471.35:068:19Waxing Gibbous23Sat
24Sun9:228.99:3510.83:320.53:411.15:078:19Waxing Gibbous24Sun
25Mon10:179.110:2811.24:270.04:350.85:078:19Full Moon25Mon
26Tue11:119.411:2011.65:21-0.55:280.55:078:19Full Moon26Tue
27Wed12:059.76:13-0.96:220.25:088:19Full Moon27Wed
28Thu12:1411.812:5910.07:06-1.27:160.05:088:19Full Moon28Thu
29Fri1:1011.91:5410.27:58-1.38:11-0.15:088:19Waning Gibbous29Fri
30Sat2:0611.72:4810.48:50-1.29:07-0.15:098:19Waning Gibbous30Sat
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 8:08 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 36% 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 First Quarter (36% 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