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 6h 42m 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 1927

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun9:014.49:245.23:21-0.63:09-0.65:397:39New Moon1Sun
2Mon9:514.310:145.14:15-0.63:54-0.55:387:40New Moon2Mon
3Tue10:414.211:054.85:05-0.44:40-0.45:377:41Waxing Crescent3Tue
4Wed11:334.011:574.55:51-0.25:25-0.15:357:42Waxing Crescent4Wed
5Thu12:273.76:370.16:110.25:347:43Waxing Crescent5Thu
6Fri12:524.11:233.57:280.47:000.55:337:45Waxing Crescent6Fri
7Sat1:493.72:203.38:540.67:580.75:327:46First Quarter7Sat
8Sun2:463.43:163.210:230.89:190.95:317:47First Quarter8Sun
9Mon3:443.24:143.211:180.811:000.95:297:48First Quarter9Mon
10Tue4:433.05:123.311:550.711:590.85:287:49First Quarter10Tue
11Wed5:413.06:073.412:240.65:277:50Waxing Gibbous11Wed
12Thu6:313.06:533.612:420.612:520.55:267:51Waxing Gibbous12Thu
13Fri7:133.17:333.71:210.41:220.35:257:52Waxing Gibbous13Fri
14Sat7:503.28:083.92:000.31:550.25:247:53Waxing Gibbous14Sat
15Sun8:253.38:424.02:400.12:290.15:237:54Full Moon15Sun
16Mon9:013.39:164.03:200.03:050.15:227:55Full Moon16Mon
17Tue9:383.49:524.04:000.03:420.15:217:56Full Moon17Tue
18Wed10:183.310:314.04:390.04:200.15:207:57Full Moon18Wed
19Thu11:003.311:143.95:150.14:590.25:197:58Waning Gibbous19Thu
20Fri11:473.25:510.15:390.25:187:59Waning Gibbous20Fri
21Sat12:033.812:383.26:310.26:240.35:178:00Waning Gibbous21Sat
22Sun12:563.71:333.37:170.37:170.45:168:01Third Quarter22Sun
23Mon1:533.72:293.48:160.48:240.55:168:02Third Quarter23Mon
24Tue2:503.73:263.69:260.49:490.55:158:03Third Quarter24Tue
25Wed3:503.74:263.910:350.311:180.45:148:04Third Quarter25Wed
26Thu4:533.75:294.211:320.15:138:04Waning Crescent26Thu
27Fri5:573.86:294.512:290.212:22-0.15:138:05Waning Crescent27Fri
28Sat6:564.07:244.81:26-0.11:08-0.25:128:06Waning Crescent28Sat
29Sun7:514.18:165.02:19-0.21:53-0.35:128:07New Moon29Sun
30Mon8:424.29:065.13:12-0.32:40-0.35:118:08New Moon30Mon
31Tue9:334.29:564.94:05-0.23:27-0.25:108:09New Moon31Tue
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