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 : 8:21 am (0.8 ft)
Next high tide : in 35m at 2:41 am (2.9 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 1928

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Thu4:043.64:333.111:590.211:080.26:175:32Waxing Gibbous1Thu
2Fri5:143.65:373.312:500.16:155:33Waxing Gibbous2Fri
3Sat6:133.86:313.512:110.11:330.16:145:35Waxing Gibbous3Sat
4Sun7:033.97:193.712:580.02:090.06:125:36Full Moon4Sun
5Mon7:473.98:033.91:40-0.12:37-0.16:105:37Full Moon5Mon
6Tue8:273.98:453.92:20-0.23:00-0.16:095:38Full Moon6Tue
7Wed9:063.89:243.92:59-0.33:25-0.26:075:39Full Moon7Wed
8Thu9:433.610:023.73:37-0.33:53-0.26:065:40Waning Gibbous8Thu
9Fri10:193.310:393.64:15-0.24:23-0.16:045:42Waning Gibbous9Fri
10Sat10:563.111:163.34:52-0.14:550.06:025:43Waning Gibbous10Sat
11Sun11:342.811:543.15:300.15:290.16:015:44Waning Gibbous11Sun
12Mon12:152.66:100.36:070.35:595:45Third Quarter12Mon
13Tue12:352.91:002.46:580.56:520.55:575:46Third Quarter13Tue
14Wed1:212.81:482.48:020.77:510.65:565:47Third Quarter14Wed
15Thu2:122.82:442.49:310.79:050.65:545:48Third Quarter15Thu
16Fri3:142.83:482.510:490.610:220.55:525:50Waning Crescent16Fri
17Sat4:233.04:532.811:410.411:260.25:505:51Waning Crescent17Sat
18Sun5:253.35:503.212:230.15:495:52Waning Crescent18Sun
19Mon6:173.76:393.612:19-0.11:01-0.25:475:53Waning Crescent19Mon
20Tue7:044.07:264.11:08-0.41:40-0.45:455:54New Moon20Tue
21Wed7:504.28:124.41:57-0.62:19-0.75:445:55New Moon21Wed
22Thu8:374.38:594.62:46-0.83:00-0.85:425:56New Moon22Thu
23Fri9:244.39:484.73:36-0.83:40-0.85:405:57Waxing Crescent23Fri
24Sat10:144.110:384.64:24-0.74:22-0.75:395:58Waxing Crescent24Sat
25Sun11:073.911:334.45:12-0.45:04-0.55:376:00Waxing Crescent25Sun
26Mon12:043.66:04-0.15:51-0.25:356:01Waxing Crescent26Mon
27Tue12:314.11:033.47:150.26:450.25:336:02First Quarter27Tue
28Wed1:333.82:043.29:260.47:570.45:326:03First Quarter28Wed
29Thu2:373.63:083.210:450.49:580.65:306:04First Quarter29Thu
30Fri3:473.54:163.211:430.411:280.55:286:05Waxing Gibbous30Fri
31Sat4:563.55:193.412:290.35:276:06Waxing Gibbous31Sat
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 5:31 am — 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