Tides Today & Tomorrow in Onset Beach, MA

TIDE TIMES for Thursday, August 20, 2026
The tide is currently rising in Onset Beach, MA.
Next low tide : 10:16 pm (1.2 ft)
Next high tide : in 5h 49m at 3:15 pm (3.4 ft)
Sunset today : 7:35 pm
Sunrise tomorrow : 5:56 am
Moon phase : First Quarter (55% illuminated)
Tide Station Location : Station #8447277
Common Questions About Tides

Onset Beach, MA Tides - Mar 1927

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue6:113.96:353.612:00-0.31:01-0.36:185:31Waning Crescent1Tue
2Wed7:034.37:264.012:56-0.61:46-0.56:175:33New Moon2Wed
3Thu7:524.58:164.41:49-0.82:31-0.76:155:34New Moon3Thu
4Fri8:414.69:054.62:44-0.93:14-0.96:135:35New Moon4Fri
5Sat9:304.69:554.63:36-0.93:56-0.96:125:36Waxing Crescent5Sat
6Sun10:204.310:474.64:27-0.84:36-0.86:105:37Waxing Crescent6Sun
7Mon11:134.011:414.35:16-0.55:17-0.66:085:38Waxing Crescent7Mon
8Tue12:083.76:09-0.26:00-0.36:075:40First Quarter8Tue
9Wed12:384.11:053.47:190.26:510.16:055:41First Quarter9Wed
10Thu1:363.82:043.19:220.47:540.46:045:42First Quarter10Thu
11Fri2:383.53:063.010:430.59:210.56:025:43First Quarter11Fri
12Sat3:473.34:133.011:420.511:000.56:005:44Waxing Gibbous12Sat
13Sun4:563.35:163.112:290.45:595:45Waxing Gibbous13Sun
14Mon5:543.36:103.31:050.35:575:46Waxing Gibbous14Mon
15Tue6:413.56:553.412:310.31:320.25:555:48Waxing Gibbous15Tue
16Wed7:223.57:363.61:080.11:550.15:535:49Full Moon16Wed
17Thu7:583.68:133.71:450.02:210.05:525:50Full Moon17Thu
18Fri8:313.68:483.72:25-0.22:50-0.15:505:51Full Moon18Fri
19Sat9:043.59:213.73:05-0.23:20-0.15:485:52Full Moon19Sat
20Sun9:363.39:533.63:43-0.23:51-0.15:475:53Waning Gibbous20Sun
21Mon10:093.210:273.54:19-0.24:21-0.15:455:54Waning Gibbous21Mon
22Tue10:463.011:043.34:530.04:510.05:435:55Waning Gibbous22Tue
23Wed11:272.811:463.25:280.15:240.15:425:57Waning Gibbous23Wed
24Thu12:142.76:060.36:030.35:405:58Third Quarter24Thu
25Fri12:343.11:062.76:540.56:530.45:385:59Third Quarter25Fri
26Sat1:283.12:022.78:020.67:590.45:366:00Third Quarter26Sat
27Sun2:283.23:042.89:320.59:200.45:356:01Third Quarter27Sun
28Mon3:353.34:113.110:510.310:390.15:336:02Waning Crescent28Mon
29Tue4:453.65:163.511:450.111:46-0.25:316:03Waning Crescent29Tue
30Wed5:473.96:134.012:31-0.25:306:04Waning Crescent30Wed
31Thu6:414.37:054.412:44-0.51:15-0.55:286:05New Moon31Thu
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8447277)

Common Questions About Onset Beach, MA Tides

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What time does the tide turn (slack tide) in Onset Beach, MA today?

Slack tide in Onset Beach, MA is approximately 6:45 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 Onset Beach, MA?

Onset Beach, MA is currently in a neap phase. Tonight's moon is 55% 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 near their weekly minimum.

What datum are Onset Beach, 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 Onset Beach, MA?

Tide predictions for Onset Beach, 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 Onset Beach, MA?

Tide data for Onset Beach, MA is sourced from NOAA Station #8447277. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8447277.

What is the moon phase in Onset Beach, MA tonight?

Tonight the moon over Onset Beach, MA is First Quarter (55% illuminated). This places Onset Beach, MA in a neap tide cycle, so tidal ranges are near their weekly minimum 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