Tides Today & Tomorrow in Onset Beach, MA

TIDE TIMES for Monday, August 17, 2026
The tide is currently rising in Onset Beach, MA.
Next low tide : 6:55 pm (0.6 ft)
Next high tide : in 4h 11m at 12:45 pm (4.2 ft)
Sunset today : 7:39 pm
Sunrise tomorrow : 5:53 am
Moon phase : Waxing Crescent (27% illuminated)
Tide Station Location : Station #8447277
Common Questions About Tides

Onset Beach, MA Tides - May 1934

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue10:293.710:514.54:46-0.34:31-0.35:397:39Waning Gibbous1Tue
2Wed11:213.711:444.45:31-0.25:18-0.25:387:41Waning Gibbous2Wed
3Thu12:163.66:190.06:080.05:367:42Waning Gibbous3Thu
4Fri12:424.21:153.67:120.27:040.25:357:43Third Quarter4Fri
5Sat1:424.02:153.68:250.38:170.55:347:44Third Quarter5Sat
6Sun2:423.93:153.710:030.410:150.55:337:45Third Quarter6Sun
7Mon3:433.74:173.811:090.311:470.45:317:46Third Quarter7Mon
8Tue4:453.65:204.011:560.35:307:47Waning Crescent8Tue
9Wed5:473.66:194.212:460.312:320.25:297:48Waning Crescent9Wed
10Thu6:443.67:124.41:340.21:040.15:287:49Waning Crescent10Thu
11Fri7:353.78:004.52:170.11:370.15:277:50New Moon11Fri
12Sat8:223.78:444.52:560.12:120.15:267:51New Moon12Sat
13Sun9:073.79:264.43:330.12:510.15:257:52New Moon13Sun
14Mon9:503.610:084.14:090.13:330.15:247:53New Moon14Mon
15Tue10:333.510:493.94:450.24:170.25:237:54Waxing Crescent15Tue
16Wed11:163.311:303.65:210.35:000.35:227:55Waxing Crescent16Wed
17Thu12:003.25:570.45:430.45:217:56Waxing Crescent17Thu
18Fri12:133.412:463.06:360.56:280.65:207:57Waxing Crescent18Fri
19Sat12:563.21:323.07:190.77:160.75:197:58First Quarter19Sat
20Sun1:403.02:183.08:090.88:150.95:187:59First Quarter20Sun
21Mon2:232.93:033.09:070.89:270.95:178:00First Quarter21Mon
22Tue3:082.83:493.210:030.710:410.85:168:01First Quarter22Tue
23Wed3:572.84:403.410:510.611:430.65:158:02Waxing Gibbous23Wed
24Thu4:532.95:343.611:360.45:158:03Waxing Gibbous24Thu
25Fri5:533.06:263.912:340.412:190.25:148:04Waxing Gibbous25Fri
26Sat6:493.27:164.31:210.21:020.05:138:05Waxing Gibbous26Sat
27Sun7:413.58:054.52:070.01:47-0.25:138:06Full Moon27Sun
28Mon8:323.78:554.72:55-0.22:34-0.35:128:06Full Moon28Mon
29Tue9:223.89:454.83:46-0.33:25-0.35:118:07Full Moon29Tue
30Wed10:143.910:374.84:37-0.34:18-0.35:118:08Waning Gibbous30Wed
31Thu11:074.011:324.65:28-0.25:11-0.25:108:09Waning Gibbous31Thu
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 3:50 pm — 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 27% 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 Waxing Crescent (27% 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