Tides Today & Tomorrow in Onset Beach, MA

TIDE TIMES for Thursday, August 20, 2026
The tide is currently rising in Onset Beach, MA.
Next low tide : 10:16 pm (1.2 ft)
Next high tide : in 37m at 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 - May 1926

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat11:433.55:45-0.15:37-0.15:397:39Waning Gibbous1Sat
2Sun12:034.112:363.46:270.06:230.15:387:40Waning Gibbous2Sun
3Mon12:584.01:333.47:170.27:160.35:367:42Third Quarter3Mon
4Tue1:573.92:323.48:220.48:240.45:357:43Third Quarter4Tue
5Wed2:573.83:323.69:530.49:540.55:347:44Third Quarter5Wed
6Thu4:003.84:363.811:150.311:340.35:337:45Third Quarter6Thu
7Fri5:063.85:404.012:090.25:317:46Waning Crescent7Fri
8Sat6:093.96:394.412:430.112:510.05:307:47Waning Crescent8Sat
9Sun7:064.17:334.71:370.01:30-0.15:297:48Waning Crescent9Sun
10Mon7:584.18:224.82:26-0.22:08-0.25:287:49New Moon10Mon
11Tue8:474.29:094.93:14-0.22:47-0.25:277:50New Moon11Tue
12Wed9:344.19:554.73:59-0.23:28-0.25:267:51New Moon12Wed
13Thu10:204.010:414.54:41-0.14:10-0.15:257:52New Moon13Thu
14Fri11:073.811:274.25:180.04:530.15:247:53Waxing Crescent14Fri
15Sat11:553.55:550.25:350.25:237:54Waxing Crescent15Sat
16Sun12:143.812:453.36:320.46:190.55:227:55Waxing Crescent16Sun
17Mon1:033.51:353.27:160.67:070.75:217:56Waxing Crescent17Mon
18Tue1:523.22:253.18:100.88:050.85:207:57First Quarter18Tue
19Wed2:403.03:143.09:200.89:170.95:197:58First Quarter19Wed
20Thu3:272.94:043.010:270.810:360.95:187:59First Quarter20Thu
21Fri4:172.84:563.111:170.711:410.75:178:00First Quarter21Fri
22Sat5:102.85:483.311:580.55:168:01Waxing Gibbous22Sat
23Sun6:033.06:343.612:320.512:350.35:158:02Waxing Gibbous23Sun
24Mon6:503.17:163.91:160.31:110.25:158:03Waxing Gibbous24Mon
25Tue7:343.37:574.11:580.11:480.05:148:04Waxing Gibbous25Tue
26Wed8:183.58:384.32:400.02:26-0.15:138:05Full Moon26Wed
27Thu9:023.69:224.53:24-0.23:08-0.25:138:06Full Moon27Thu
28Fri9:483.710:084.54:08-0.23:51-0.25:128:06Full Moon28Fri
29Sat10:373.810:574.54:52-0.24:37-0.25:118:07Waning Gibbous29Sat
30Sun11:283.811:494.45:36-0.25:25-0.15:118:08Waning Gibbous30Sun
31Mon12:233.86:210.06:150.15:108:09Waning Gibbous31Mon
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 6:45 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 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