Tides Today & Tomorrow in Onset Beach, MA

TIDE TIMES for Thursday, August 20, 2026
The tide is currently falling in Onset Beach, MA.
Next low tide : in 4h 32m at 10:16 pm (1.2 ft)
Next high tide (tomorrow) : 3:33 am (2.8 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 - Dec 1925

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue8:524.39:143.62:18-0.13:240.06:504:13Full Moon1Tue
2Wed9:334.09:573.42:590.04:000.16:514:13Waning Gibbous2Wed
3Thu10:133.810:403.23:420.04:370.26:524:12Waning Gibbous3Thu
4Fri10:543.511:253.14:240.25:140.36:534:12Waning Gibbous4Fri
5Sat11:363.25:070.35:550.56:544:12Waning Gibbous5Sat
6Sun12:112.912:203.05:530.56:410.66:554:12Third Quarter6Sun
7Mon12:572.81:042.96:450.77:360.66:564:12Third Quarter7Mon
8Tue1:432.81:492.87:490.88:390.66:574:12Third Quarter8Tue
9Wed2:292.92:372.89:050.79:350.56:574:12Third Quarter9Wed
10Thu3:193.13:312.810:150.610:240.36:584:12Waning Crescent10Thu
11Fri4:143.34:313.011:110.311:080.16:594:12Waning Crescent11Fri
12Sat5:083.65:283.212:000.17:004:12Waning Crescent12Sat
13Sun5:594.06:203.412:45-0.27:014:12Waning Crescent13Sun
14Mon6:474.37:103.712:34-0.41:31-0.47:024:12New Moon14Mon
15Tue7:364.68:003.91:19-0.62:19-0.57:024:12New Moon15Tue
16Wed8:254.78:504.02:07-0.73:08-0.67:034:13New Moon16Wed
17Thu9:154.89:424.02:57-0.73:58-0.67:044:13Waxing Crescent17Thu
18Fri10:084.710:374.03:48-0.64:45-0.57:044:13Waxing Crescent18Fri
19Sat11:034.511:343.94:40-0.45:34-0.37:054:14Waxing Crescent19Sat
20Sun12:004.25:34-0.26:28-0.17:054:14Waxing Crescent20Sun
21Mon12:333.912:584.06:370.17:350.17:064:15First Quarter21Mon
22Tue1:323.81:563.78:200.48:590.27:064:15First Quarter22Tue
23Wed2:313.82:553.510:110.410:040.27:074:16First Quarter23Wed
24Thu3:333.83:573.311:170.310:510.27:074:16Waxing Gibbous24Thu
25Fri4:353.94:593.312:090.27:084:17Waxing Gibbous25Fri
26Sat5:333.95:543.312:520.27:084:17Waxing Gibbous26Sat
27Sun6:254.06:443.412:010.11:290.17:084:18Waxing Gibbous27Sun
28Mon7:104.07:293.412:370.02:010.17:094:19Full Moon28Mon
29Tue7:524.08:113.41:15-0.12:330.07:094:20Full Moon29Tue
30Wed8:323.98:513.41:57-0.13:070.07:094:20Full Moon30Wed
31Thu9:103.89:313.32:40-0.13:410.07:094:21Full 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 12:54 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