Tides Today & Tomorrow in Westport Harbor, MA

TIDE TIMES for Tuesday, August 18, 2026
The tide is currently falling in Westport Harbor, MA.
Next low tide : in 3h 45m at 6:51 pm (0.7 ft)
Next high tide (tomorrow) : 1:19 am (2.6 ft)
Sunset today : 7:39 pm
Sunrise tomorrow : 5:56 am
Moon phase : First Quarter (36% illuminated)
Tide Station Location : Station #8447975
Common Questions About Tides

Westport Harbor, MA Tides - Jul 1943

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Thu8:013.08:233.42:060.31:230.25:138:22New Moon1Thu
2Fri8:443.09:023.42:410.32:060.25:148:22New Moon2Fri
3Sat9:243.09:403.33:180.22:510.25:148:21New Moon3Sat
4Sun10:042.910:163.13:540.23:360.25:158:21Waxing Crescent4Sun
5Mon10:442.810:523.04:290.24:190.35:158:21Waxing Crescent5Mon
6Tue11:242.811:292.95:030.35:000.45:168:21Waxing Crescent6Tue
7Wed12:052.75:370.35:410.55:178:20Waxing Crescent7Wed
8Thu12:092.712:472.76:110.46:260.65:178:20Waxing Crescent8Thu
9Fri12:522.71:302.76:500.47:180.65:188:20First Quarter9Fri
10Sat1:382.62:152.87:360.48:220.75:198:19First Quarter10Sat
11Sun2:272.63:053.08:300.49:330.65:198:19First Quarter11Sun
12Mon3:222.64:003.19:280.310:410.45:208:18Waxing Gibbous12Mon
13Tue4:242.75:023.310:270.211:400.25:218:18Waxing Gibbous13Tue
14Wed5:292.86:033.611:240.05:228:17Waxing Gibbous14Wed
15Thu6:303.16:593.912:330.112:18-0.25:228:17Waxing Gibbous15Thu
16Fri7:263.37:534.11:26-0.11:12-0.35:238:16Full Moon16Fri
17Sat8:203.68:464.22:19-0.22:08-0.45:248:16Full Moon17Sat
18Sun9:133.79:384.23:13-0.33:05-0.45:258:15Full Moon18Sun
19Mon10:063.810:314.14:04-0.34:02-0.35:268:14Waning Gibbous19Mon
20Tue11:003.811:243.94:51-0.34:56-0.15:278:14Waning Gibbous20Tue
21Wed11:553.85:35-0.25:520.15:278:13Waning Gibbous21Wed
22Thu12:193.712:523.76:200.06:580.35:288:12Third Quarter22Thu
23Fri1:153.41:483.67:090.28:420.55:298:11Third Quarter23Fri
24Sat2:103.12:453.48:060.410:080.65:308:10Third Quarter24Sat
25Sun3:052.93:433.39:060.511:100.65:318:09Third Quarter25Sun
26Mon4:042.84:443.210:020.511:590.65:328:09Waning Crescent26Mon
27Tue5:062.75:443.210:520.55:338:08Waning Crescent27Tue
28Wed6:042.76:363.212:390.611:37 AM0.55:348:07Waning Crescent28Wed
29Thu6:542.87:213.21:110.512:210.45:358:06Waning Crescent29Thu
30Fri7:382.98:013.31:420.41:040.35:368:05New Moon30Fri
31Sat8:193.08:383.32:160.31:480.25:378:04New Moon31Sat
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 10:05 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 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 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 (36% 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