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 : 11:33 pm (1.1 ft)
Next high tide : in 1h 17m at 4:11 pm (3.2 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 - Nov 1923

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Thu1:073.01:203.36:560.77:570.86:134:38Third Quarter1Thu
2Fri2:003.12:153.48:050.79:140.66:154:37Third Quarter2Fri
3Sat2:563.43:153.59:230.610:160.46:164:36Waning Crescent3Sat
4Sun3:563.74:193.710:350.311:060.16:174:34Waning Crescent4Sun
5Mon4:574.15:204.011:350.011:52-0.26:184:33Waning Crescent5Mon
6Tue5:534.56:164.212:29-0.36:204:32Waning Crescent6Tue
7Wed6:454.97:094.412:37-0.51:20-0.56:214:31New Moon7Wed
8Thu7:365.28:004.61:22-0.62:13-0.66:224:30New Moon8Thu
9Fri8:275.38:524.52:10-0.73:06-0.66:234:29New Moon9Fri
10Sat9:195.39:444.42:59-0.63:58-0.56:244:28Waxing Crescent10Sat
11Sun10:125.010:394.23:49-0.44:49-0.26:264:27Waxing Crescent11Sun
12Mon11:074.711:364.04:38-0.25:400.06:274:26Waxing Crescent12Mon
13Tue12:054.35:290.16:420.36:284:25First Quarter13Tue
14Wed12:353.81:044.06:270.58:260.56:294:24First Quarter14Wed
15Thu1:353.72:023.77:580.79:420.66:314:23First Quarter15Thu
16Fri2:333.63:003.510:080.810:330.66:324:22First Quarter16Fri
17Sat3:333.64:003.411:050.711:080.56:334:21Waxing Gibbous17Sat
18Sun4:333.64:573.311:460.611:320.56:344:20Waxing Gibbous18Sun
19Mon5:273.75:473.412:170.56:354:20Waxing Gibbous19Mon
20Tue6:133.86:303.412:480.46:374:19Waxing Gibbous20Tue
21Wed6:533.97:093.412:280.21:210.26:384:18Full Moon21Wed
22Thu7:293.97:463.51:030.11:570.16:394:17Full Moon22Thu
23Fri8:033.98:223.41:400.02:360.16:404:17Full Moon23Fri
24Sat8:363.98:593.42:190.03:150.06:414:16Full Moon24Sat
25Sun9:103.89:373.32:580.03:520.16:424:16Waning Gibbous25Sun
26Mon9:463.710:173.23:370.04:260.26:444:15Waning Gibbous26Mon
27Tue10:263.611:013.14:150.15:000.26:454:15Waning Gibbous27Tue
28Wed11:103.511:503.14:540.25:360.36:464:14Waning Gibbous28Wed
29Thu12:013.45:370.36:190.46:474:14Third Quarter29Thu
30Fri12:413.112:543.46:290.47:120.46:484:13Third Quarter30Fri
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 7:52 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 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