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 : 9:25 am (1.0 ft)
Next high tide : in 1h 57m at 3:33 am (2.8 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 - Feb 1925

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun2:293.22:492.79:540.68:470.46:554:57First Quarter1Sun
2Mon3:273.13:482.610:570.69:500.46:544:58First Quarter2Mon
3Tue4:303.04:502.611:420.510:490.46:535:00Waxing Gibbous3Tue
4Wed5:293.15:442.712:210.46:525:01Waxing Gibbous4Wed
5Thu6:163.26:302.912:580.26:505:02Waxing Gibbous5Thu
6Fri6:563.37:103.112:260.01:350.16:495:03Waxing Gibbous6Fri
7Sat7:313.47:473.21:10-0.12:13-0.16:485:05Full Moon7Sat
8Sun8:043.58:233.31:53-0.32:49-0.26:475:06Full Moon8Sun
9Mon8:383.69:003.42:35-0.33:22-0.36:465:07Full Moon9Mon
10Tue9:133.69:383.43:16-0.43:52-0.36:445:09Full Moon10Tue
11Wed9:513.610:173.53:54-0.44:20-0.36:435:10Waning Gibbous11Wed
12Thu10:323.511:013.54:31-0.34:50-0.36:425:11Waning Gibbous12Thu
13Fri11:183.311:483.55:10-0.25:25-0.36:415:12Waning Gibbous13Fri
14Sat12:083.25:53-0.16:06-0.26:395:14Third Quarter14Sat
15Sun12:403.51:033.16:460.16:56-0.16:385:15Third Quarter15Sun
16Mon1:353.52:013.07:530.27:580.06:375:16Third Quarter16Mon
17Tue2:353.63:043.09:230.39:120.06:355:17Third Quarter17Tue
18Wed3:413.74:123.110:580.110:29-0.16:345:19Waning Crescent18Wed
19Thu4:513.95:203.412:03-0.16:325:20Waning Crescent19Thu
20Fri5:544.26:203.812:56-0.36:315:21Waning Crescent20Fri
21Sat6:514.47:134.112:40-0.51:44-0.46:305:22New Moon21Sat
22Sun7:424.68:044.31:36-0.72:29-0.66:285:24New Moon22Sun
23Mon8:314.68:534.42:30-0.73:10-0.66:275:25New Moon23Mon
24Tue9:184.59:414.43:20-0.73:47-0.66:255:26New Moon24Tue
25Wed10:054.210:294.24:06-0.64:21-0.56:245:27Waxing Crescent25Wed
26Thu10:523.911:174.04:47-0.44:55-0.36:225:28Waxing Crescent26Thu
27Fri11:403.55:28-0.15:30-0.16:205:30Waxing Crescent27Fri
28Sat12:073.612:303.26:110.26:100.16:195:31First Quarter28Sat
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 6:29 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 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