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 2h 11m 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 - Oct 1927

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat11:323.511:582.95:100.55:550.75:385:26Waxing Crescent1Sat
2Sun12:183.45:480.66:410.95:395:24First Quarter2Sun
3Mon12:482.91:103.36:340.87:461.05:405:23First Quarter3Mon
4Tue1:422.92:063.47:360.89:180.95:415:21First Quarter4Tue
5Wed2:403.03:073.58:550.810:320.75:425:19First Quarter5Wed
6Thu3:433.24:133.710:140.611:220.45:445:17Waxing Gibbous6Thu
7Fri4:463.65:154.011:200.35:455:16Waxing Gibbous7Fri
8Sat5:444.16:114.412:040.112:160.05:465:14Waxing Gibbous8Sat
9Sun6:374.57:024.612:45-0.21:08-0.35:475:12Full Moon9Sun
10Mon7:274.97:514.71:27-0.42:01-0.55:485:11Full Moon10Mon
11Tue8:165.28:414.72:10-0.62:54-0.55:495:09Full Moon11Tue
12Wed9:065.39:314.62:54-0.63:47-0.45:505:08Waning Gibbous12Wed
13Thu9:575.210:244.33:39-0.54:38-0.25:515:06Waning Gibbous13Thu
14Fri10:504.911:194.04:24-0.35:300.15:525:04Waning Gibbous14Fri
15Sat11:484.65:100.06:330.45:535:03Waning Gibbous15Sat
16Sun12:183.812:484.26:000.48:290.75:555:01Third Quarter16Sun
17Mon1:183.61:503.97:000.79:530.75:565:00Third Quarter17Mon
18Tue2:193.52:533.78:360.910:530.75:574:58Third Quarter18Tue
19Wed3:213.43:573.510:380.911:390.75:584:57Waning Crescent19Wed
20Thu4:243.54:583.511:290.85:594:55Waning Crescent20Thu
21Fri5:213.65:493.612:110.612:040.76:004:54Waning Crescent21Fri
22Sat6:093.86:313.612:340.512:350.56:024:52Waning Crescent22Sat
23Sun6:504.07:093.712:530.41:080.46:034:51New Moon23Sun
24Mon7:274.17:433.61:180.31:440.26:044:49New Moon24Mon
25Tue8:024.18:173.61:480.22:230.16:054:48New Moon25Tue
26Wed8:354.18:513.52:210.13:020.16:064:46New Moon26Wed
27Thu9:074.09:263.42:560.13:400.26:074:45New Moon27Thu
28Fri9:413.810:033.23:300.24:160.36:094:43Waxing Crescent28Fri
29Sat10:183.710:453.14:050.34:510.46:104:42Waxing Crescent29Sat
30Sun11:003.611:333.04:410.45:280.56:114:41Waxing Crescent30Sun
31Mon11:503.45:200.56:110.76:124:39Waxing Crescent31Mon
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8447277)

Common Questions About Onset Beach, MA Tides

Show All
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