Tides Today & Tomorrow in Onset Beach, MA

TIDE TIMES for Friday, August 21, 2026
The tide is currently rising in Onset Beach, MA.
Next low tide : 11:33 pm (1.1 ft)
Next high tide : in 35m at 4:11 pm (3.2 ft)
Sunset today : 7:33 pm
Sunrise tomorrow : 5:57 am
Moon phase : First Quarter (65% illuminated)
Tide Station Location : Station #8447277
Common Questions About Tides

Onset Beach, MA Tides - Oct 1923

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Mon12:113.35:480.66:350.95:385:26Third Quarter1Mon
2Tue12:463.012:593.26:340.77:361.05:395:24Third Quarter2Tue
3Wed1:362.91:503.27:320.89:031.05:405:23Third Quarter3Wed
4Thu2:293.02:463.38:430.810:170.85:415:21Third Quarter4Thu
5Fri3:273.23:483.59:560.611:060.55:425:19Waning Crescent5Fri
6Sat4:273.54:513.811:000.411:470.25:435:18Waning Crescent6Sat
7Sun5:253.95:484.111:550.05:455:16Waning Crescent7Sun
8Mon6:184.46:394.412:27-0.112:45-0.25:465:14New Moon8Mon
9Tue7:074.87:294.61:08-0.31:35-0.45:475:13New Moon9Tue
10Wed7:565.18:194.71:51-0.52:26-0.55:485:11New Moon10Wed
11Thu8:465.39:104.72:36-0.63:19-0.55:495:09New Moon11Thu
12Fri9:375.210:024.53:22-0.54:10-0.45:505:08Waxing Crescent12Fri
13Sat10:305.110:574.34:08-0.45:01-0.15:515:06Waxing Crescent13Sat
14Sun11:274.811:554.14:56-0.15:550.25:525:04Waxing Crescent14Sun
15Mon12:264.55:460.27:100.55:535:03First Quarter15Mon
16Tue12:553.91:274.26:460.59:110.65:555:01First Quarter16Tue
17Wed1:563.72:284.08:290.810:220.65:565:00First Quarter17Wed
18Thu2:583.73:313.810:320.811:150.65:574:58First Quarter18Thu
19Fri4:013.74:333.711:290.711:530.55:584:57Waxing Gibbous19Fri
20Sat5:013.85:293.812:090.65:594:55Waxing Gibbous20Sat
21Sun5:544.06:173.812:190.512:400.56:004:54Waxing Gibbous21Sun
22Mon6:394.16:593.812:380.41:080.46:024:52Full Moon22Mon
23Tue7:194.27:373.81:030.31:400.36:034:51Full Moon23Tue
24Wed7:564.28:143.81:340.22:160.26:044:49Full Moon24Wed
25Thu8:314.18:503.72:090.12:550.16:054:48Full Moon25Thu
26Fri9:054.09:263.52:460.13:330.26:064:46Full Moon26Fri
27Sat9:383.810:033.43:240.14:100.26:074:45Waning Gibbous27Sat
28Sun10:133.710:433.24:020.24:460.46:094:44Waning Gibbous28Sun
29Mon10:523.511:283.14:390.35:220.56:104:42Waning Gibbous29Mon
30Tue11:363.45:180.56:010.76:114:41Waning Gibbous30Tue
31Wed12:163.012:263.36:010.66:510.86:124:40Third Quarter31Wed
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 7:52 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 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 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 (65% illuminated). This places Onset Beach, 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