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 2h 07m 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 - May 1939

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Mon6:473.37:133.912:53-0.112:48-0.15:417:41Waxing Gibbous1Mon
2Tue7:383.48:024.01:40-0.21:27-0.25:407:42Full Moon2Tue
3Wed8:263.48:494.02:26-0.22:07-0.25:397:43Full Moon3Wed
4Thu9:133.39:353.83:09-0.22:49-0.15:387:44Full Moon4Thu
5Fri9:593.210:203.63:48-0.13:310.05:367:45Waning Gibbous5Fri
6Sat10:453.111:063.34:250.04:130.15:357:46Waning Gibbous6Sat
7Sun11:322.911:533.15:020.14:550.25:347:47Waning Gibbous7Sun
8Mon12:212.75:410.35:400.45:337:48Waning Gibbous8Mon
9Tue12:412.81:102.66:240.46:290.65:327:49Third Quarter9Tue
10Wed1:292.61:582.57:150.57:300.75:307:50Third Quarter10Wed
11Thu2:152.52:452.58:170.68:470.75:297:51Third Quarter11Thu
12Fri3:012.43:342.59:200.610:060.75:287:52Third Quarter12Fri
13Sat3:512.34:262.610:140.511:060.55:277:53Waning Crescent13Sat
14Sun4:452.45:172.811:000.311:540.45:267:54Waning Crescent14Sun
15Mon5:392.56:053.011:410.25:257:55Waning Crescent15Mon
16Tue6:272.66:483.212:370.212:210.05:247:56Waning Crescent16Tue
17Wed7:122.87:313.41:190.01:01-0.15:237:57New Moon17Wed
18Thu7:573.08:143.62:01-0.11:42-0.25:227:58New Moon18Thu
19Fri8:423.18:593.72:44-0.22:26-0.25:217:59New Moon19Fri
20Sat9:293.29:463.73:28-0.23:12-0.35:208:00New Moon20Sat
21Sun10:193.310:373.74:12-0.23:59-0.25:208:01Waxing Crescent21Sun
22Mon11:113.311:303.64:55-0.24:48-0.15:198:02Waxing Crescent22Mon
23Tue12:073.35:41-0.15:390.05:188:03Waxing Crescent23Tue
24Wed12:263.51:043.36:320.16:380.25:178:04First Quarter24Wed
25Thu1:243.32:023.37:360.27:530.45:178:05First Quarter25Thu
26Fri2:233.23:003.48:550.29:390.45:168:06First Quarter26Fri
27Sat3:223.14:003.510:040.211:020.35:158:06First Quarter27Sat
28Sun4:253.05:033.610:560.25:158:07Waxing Gibbous28Sun
29Mon5:283.06:013.712:000.211:39 AM0.15:148:08Waxing Gibbous29Mon
30Tue6:263.16:553.812:480.212:180.15:138:09Waxing Gibbous30Tue
31Wed7:183.17:443.81:310.112:570.15:138:10Full Moon31Wed
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8447975)

Common Questions About Westport Harbor, MA Tides

Show All
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