Tides Today & Tomorrow in Westport Harbor, MA

TIDE TIMES for Friday, August 21, 2026
The tide is currently rising in Westport Harbor, MA.
Next low tide : 10:41 pm (0.9 ft)
Next high tide : in 42m at 3:39 pm (2.7 ft)
Sunset today : 7:35 pm
Sunrise tomorrow : 5:59 am
Moon phase : First Quarter (65% illuminated)
Tide Station Location : Station #8447975
Common Questions About Tides

Westport Harbor, MA Tides - Mar 1939

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed3:202.93:562.710:210.19:57-0.26:195:33Waxing Gibbous1Wed
2Thu4:303.25:013.111:16-0.111:03-0.46:185:35Waxing Gibbous2Thu
3Fri5:313.45:583.412:04-0.36:165:36Waxing Gibbous3Fri
4Sat6:253.66:503.712:02-0.612:48-0.56:155:37Full Moon4Sat
5Sun7:163.87:413.912:57-0.71:32-0.66:135:38Full Moon5Sun
6Mon8:053.88:304.01:51-0.72:14-0.66:125:39Full Moon6Mon
7Tue8:543.79:193.92:42-0.72:54-0.66:105:40Waning Gibbous7Tue
8Wed9:423.410:093.73:28-0.53:32-0.56:085:42Waning Gibbous8Wed
9Thu10:323.211:013.44:11-0.34:10-0.36:075:43Waning Gibbous9Thu
10Fri11:242.911:543.14:530.04:510.06:055:44Waning Gibbous10Fri
11Sat12:182.65:400.35:360.26:035:45Third Quarter11Sat
12Sun12:492.81:122.46:420.56:320.46:025:46Third Quarter12Sun
13Mon1:452.62:092.38:340.67:480.66:005:47Third Quarter13Mon
14Tue2:462.43:102.29:470.69:180.55:585:48Third Quarter14Tue
15Wed3:512.44:132.310:310.510:220.45:575:49Waning Crescent15Wed
16Thu4:492.45:062.511:060.411:090.35:555:51Waning Crescent16Thu
17Fri5:352.65:502.611:390.211:500.15:535:52Waning Crescent17Fri
18Sat6:132.76:282.812:120.05:525:53Waning Crescent18Sat
19Sun6:472.87:022.912:31-0.112:46-0.15:505:54New Moon19Sun
20Mon7:212.97:363.11:11-0.21:20-0.25:485:55New Moon20Mon
21Tue7:552.98:103.11:50-0.21:53-0.35:475:56New Moon21Tue
22Wed8:312.98:473.22:27-0.32:26-0.35:455:57New Moon22Wed
23Thu9:112.99:263.13:02-0.23:00-0.35:435:58Waxing Crescent23Thu
24Fri9:542.810:103.13:37-0.23:35-0.25:415:59Waxing Crescent24Fri
25Sat10:422.710:593.04:13-0.14:14-0.25:406:00Waxing Crescent25Sat
26Sun11:342.711:543.04:550.04:59-0.15:386:02Waxing Crescent26Sun
27Mon12:302.65:470.25:540.15:366:03First Quarter27Mon
28Tue12:522.91:292.76:570.37:040.25:356:04First Quarter28Tue
29Wed1:542.92:322.88:410.38:270.25:336:05First Quarter29Wed
30Thu3:013.03:383.010:030.29:520.05:316:06Waxing Gibbous30Thu
31Fri4:103.14:423.310:550.011:01-0.25:306:07Waxing Gibbous31Fri
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8447975)

Common Questions About Westport Harbor, MA Tides

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

Slack tide in Westport Harbor, MA is approximately 7:10 pm — 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 Westport Harbor, MA?

Westport Harbor, MA is currently in a transitional phase. Tonight's moon is 65% 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 Westport 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 Westport Harbor, MA?

Tide predictions for Westport 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 Westport Harbor, MA?

Tide data for Westport Harbor, MA is sourced from NOAA Station #8447975. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8447975.

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

Tonight the moon over Westport Harbor, MA is First Quarter (65% illuminated). This places Westport 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