Tides Today & Tomorrow in Onset Beach, MA

TIDE TIMES for Wednesday, August 12, 2026
The tide is currently falling in Onset Beach, MA.
Next low tide : in 2h 05m at 3:21 am (0.0 ft)
Next high tide : 8:41 am (4.4 ft)
Sunset today : 7:47 pm
Sunrise tomorrow : 5:48 am
Moon phase : New Moon (0% illuminated)
Tide Station Location : Station #8447277
Common Questions About Tides

Onset Beach, MA Tides - Sep 1942

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue1:353.52:033.77:130.58:130.96:077:17Third Quarter1Tue
2Wed2:243.22:533.48:020.79:381.16:087:15Third Quarter2Wed
3Thu3:143.03:443.39:020.911:041.16:107:14Third Quarter3Thu
4Fri4:082.94:413.210:110.96:117:12Third Quarter4Fri
5Sat5:063.05:413.312:000.911:18 AM0.86:127:10Waning Crescent5Sat
6Sun6:033.16:313.412:430.812:150.66:137:09Waning Crescent6Sun
7Mon6:513.37:133.61:210.61:030.46:147:07Waning Crescent7Mon
8Tue7:333.67:503.81:570.41:480.36:157:05Waning Crescent8Tue
9Wed8:133.88:284.02:310.22:300.16:167:03New Moon9Wed
10Thu8:514.09:064.13:050.13:120.06:177:02New Moon10Thu
11Fri9:314.29:474.23:39-0.13:54-0.16:187:00New Moon11Fri
12Sat10:134.310:304.24:13-0.14:36-0.16:196:58Waxing Crescent12Sat
13Sun10:574.411:174.14:48-0.25:180.06:206:57Waxing Crescent13Sun
14Mon11:454.45:26-0.16:010.16:216:55Waxing Crescent14Mon
15Tue12:083.912:374.36:070.06:490.36:226:53Waxing Crescent15Tue
16Wed1:033.81:344.36:530.17:470.56:236:51First Quarter16Wed
17Thu2:013.72:334.27:480.39:090.76:246:50First Quarter17Thu
18Fri3:013.63:344.28:580.511:090.66:256:48First Quarter18Fri
19Sat4:053.74:404.210:260.56:266:46Waxing Gibbous19Sat
20Sun5:113.85:474.312:160.511:54 AM0.46:276:44Waxing Gibbous20Sun
21Mon6:154.16:474.51:050.312:580.26:286:43Waxing Gibbous21Mon
22Tue7:124.47:404.61:460.21:490.16:296:41Waxing Gibbous22Tue
23Wed8:044.68:284.72:220.12:360.06:306:39Full Moon23Wed
24Thu8:514.89:144.62:550.03:200.06:316:37Full Moon24Thu
25Fri9:374.89:594.43:290.04:030.06:326:36Full Moon25Fri
26Sat10:214.610:434.24:040.04:430.16:336:34Waning Gibbous26Sat
27Sun11:054.411:273.94:400.05:210.26:346:32Waning Gibbous27Sun
28Mon11:494.15:170.26:000.46:356:30Waning Gibbous28Mon
29Tue12:123.612:353.85:550.36:410.66:366:29Waning Gibbous29Tue
30Wed1:003.31:223.56:370.57:280.96:376:27Third Quarter30Wed
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 6:01 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 spring phase. Tonight's moon is 0% 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 maximum.

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 New Moon (0% illuminated). This places Onset Beach, MA in a spring tide cycle, so tidal ranges are near their weekly maximum 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