Tides Today & Tomorrow in Westport Harbor, MA

TIDE TIMES for Tuesday, August 18, 2026
The tide is currently rising in Westport Harbor, MA.
Next low tide : 6:51 pm (0.7 ft)
Next high tide : in 4h 38m at 1:02 pm (3.2 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 - Apr 1944

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat3:142.63:422.410:410.69:300.66:277:09First Quarter1Sat
2Sun4:192.44:442.411:280.610:510.66:257:10Waxing Gibbous2Sun
3Mon5:232.55:432.512:030.56:237:11Waxing Gibbous3Mon
4Tue6:152.56:312.712:320.36:227:12Waxing Gibbous4Tue
5Wed6:572.67:112.912:270.21:010.26:207:13Waxing Gibbous5Wed
6Thu7:322.77:483.01:070.11:320.16:187:14Waxing Gibbous6Thu
7Fri8:052.88:223.11:48-0.12:040.06:177:15Full Moon7Fri
8Sat8:382.98:553.22:28-0.12:36-0.16:157:17Full Moon8Sat
9Sun9:122.99:293.23:07-0.23:09-0.16:137:18Full Moon9Sun
10Mon9:492.810:063.23:44-0.23:41-0.16:127:19Full Moon10Mon
11Tue10:292.810:463.14:20-0.14:14-0.16:107:20Waning Gibbous11Tue
12Wed11:132.711:313.14:55-0.14:500.06:087:21Waning Gibbous12Wed
13Thu12:022.65:330.05:310.16:077:22Waning Gibbous13Thu
14Fri12:233.012:572.66:180.26:190.26:057:23Third Quarter14Fri
15Sat1:193.01:542.67:160.37:200.36:047:24Third Quarter15Sat
16Sun2:193.02:542.78:350.48:380.36:027:25Third Quarter16Sun
17Mon3:223.03:582.810:070.310:080.26:017:26Third Quarter17Mon
18Tue4:293.15:043.111:130.111:270.05:597:27Waning Crescent18Tue
19Wed5:353.36:053.512:02-0.15:587:28Waning Crescent19Wed
20Thu6:343.57:003.812:28-0.212:45-0.25:567:29Waning Crescent20Thu
21Fri7:273.67:514.01:23-0.31:27-0.45:557:31New Moon21Fri
22Sat8:173.78:404.12:15-0.42:09-0.45:537:32New Moon22Sat
23Sun9:053.69:284.13:06-0.42:51-0.45:527:33New Moon23Sun
24Mon9:543.510:163.93:54-0.43:34-0.35:507:34Waxing Crescent24Mon
25Tue10:433.311:053.74:36-0.24:15-0.15:497:35Waxing Crescent25Tue
26Wed11:333.111:563.35:160.04:570.15:477:36Waxing Crescent26Wed
27Thu12:262.95:570.25:410.35:467:37Waxing Crescent27Thu
28Fri12:493.01:192.76:450.56:300.55:447:38First Quarter28Fri
29Sat1:432.72:132.67:540.67:300.75:437:39First Quarter29Sat
30Sun2:372.53:072.59:300.78:490.75:427:40First Quarter30Sun
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 3:56 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