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 05m 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 - Sep 1925

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue7:434.48:115.02:070.02:02-0.26:087:17Full Moon1Tue
2Wed8:364.79:025.02:54-0.22:58-0.36:097:15Full Moon2Wed
3Thu9:264.99:515.03:39-0.33:53-0.36:107:13Full Moon3Thu
4Fri10:164.910:404.84:21-0.34:45-0.26:117:12Waning Gibbous4Fri
5Sat11:054.811:294.54:59-0.25:320.06:127:10Waning Gibbous5Sat
6Sun11:564.65:36-0.16:170.26:137:08Waning Gibbous6Sun
7Mon12:194.112:484.36:140.27:030.56:147:07Waning Gibbous7Mon
8Tue1:113.71:414.06:540.47:590.86:157:05Third Quarter8Tue
9Wed2:043.42:343.77:400.79:381.06:167:03Third Quarter9Wed
10Thu2:573.23:283.58:360.911:051.16:177:02Third Quarter10Thu
11Fri3:523.14:273.39:441.011:581.06:187:00Third Quarter11Fri
12Sat4:513.05:303.310:570.96:196:58Waning Crescent12Sat
13Sun5:513.16:253.412:380.911:59 AM0.86:206:56Waning Crescent13Sun
14Mon6:423.37:093.51:130.712:490.66:216:55Waning Crescent14Mon
15Tue7:253.57:463.71:460.51:330.46:226:53Waning Crescent15Tue
16Wed8:033.78:193.82:200.42:160.36:236:51New Moon16Wed
17Thu8:393.98:533.92:530.22:570.16:246:49New Moon17Thu
18Fri9:154.09:294.03:250.13:380.16:256:48New Moon18Fri
19Sat9:524.110:073.93:570.04:180.06:266:46New Moon19Sat
20Sun10:314.210:483.94:290.04:560.16:276:44Waxing Crescent20Sun
21Mon11:134.211:333.75:020.05:350.16:286:42Waxing Crescent21Mon
22Tue11:594.15:370.16:160.36:296:41Waxing Crescent22Tue
23Wed12:243.612:514.16:170.27:030.46:306:39Waxing Crescent23Wed
24Thu1:193.51:474.07:040.38:020.66:316:37First Quarter24Thu
25Fri2:173.42:464.08:020.59:280.76:326:35First Quarter25Fri
26Sat3:173.53:494.19:160.511:170.66:336:34First Quarter26Sat
27Sun3:223.63:564.29:430.511:210.45:345:32Waxing Gibbous27Sun
28Mon4:293.85:024.311:050.35:355:30Waxing Gibbous28Mon
29Tue5:314.26:014.612:080.212:080.15:375:29Waxing Gibbous29Tue
30Wed6:274.66:544.712:490.01:01-0.15:385:27Full Moon30Wed
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