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 50m at 8:21 am (0.8 ft)
Next high tide : 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 - Jul 1927

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Fri10:523.911:144.25:180.24:440.25:118:21Waxing Crescent1Fri
2Sat11:413.85:520.35:300.35:118:21Waxing Crescent2Sat
3Sun12:013.912:303.66:250.46:160.55:128:20Waxing Crescent3Sun
4Mon12:473.61:193.57:000.57:030.75:128:20Waxing Crescent4Mon
5Tue1:333.42:063.47:410.67:580.95:138:20First Quarter5Tue
6Wed2:163.12:513.48:280.79:051.05:138:20First Quarter6Wed
7Thu2:582.93:353.39:190.710:181.05:148:20First Quarter7Thu
8Fri3:422.84:223.310:120.711:230.95:158:19First Quarter8Fri
9Sat4:322.75:133.411:030.65:158:19Waxing Gibbous9Sat
10Sun5:292.86:053.512:170.711:51 AM0.55:168:18Waxing Gibbous10Sun
11Mon6:252.96:533.71:030.612:370.45:178:18Waxing Gibbous11Mon
12Tue7:153.17:384.01:470.41:220.35:178:18Waxing Gibbous12Tue
13Wed8:023.38:234.22:310.22:070.15:188:17Full Moon13Wed
14Thu8:483.69:084.43:150.12:530.05:198:17Full Moon14Thu
15Fri9:343.89:544.54:000.03:410.05:208:16Full Moon15Fri
16Sat10:213.910:414.54:42-0.14:30-0.15:218:15Waning Gibbous16Sat
17Sun11:114.011:314.45:23-0.15:190.05:218:15Waning Gibbous17Sun
18Mon12:034.16:02-0.16:090.15:228:14Waning Gibbous18Mon
19Tue12:244.312:574.26:44-0.17:030.35:238:13Waning Gibbous19Tue
20Wed1:184.11:524.27:300.08:100.55:248:13Third Quarter20Wed
21Thu2:143.92:484.38:230.29:460.65:258:12Third Quarter21Thu
22Fri3:113.73:464.39:230.311:230.65:268:11Third Quarter22Fri
23Sat4:113.64:484.310:260.35:278:10Waning Crescent23Sat
24Sun5:153.55:534.312:300.511:28 AM0.35:288:09Waning Crescent24Sun
25Mon6:203.66:544.41:250.412:240.35:298:08Waning Crescent25Mon
26Tue7:183.77:484.52:150.31:150.35:298:08Waning Crescent26Tue
27Wed8:103.88:374.53:010.32:030.25:308:07New Moon27Wed
28Thu8:583.99:234.43:430.32:510.25:318:06New Moon28Thu
29Fri9:444.010:074.34:190.33:390.25:328:05New Moon29Fri
30Sat10:294.010:494.14:490.34:250.25:338:04Waxing Crescent30Sat
31Sun11:123.911:293.95:170.35:090.35:348:03Waxing Crescent31Sun
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 11:48 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