Tides Today & Tomorrow in Osterville, MA

TIDE TIMES for Friday, August 21, 2026
The tide is currently rising in Osterville, MA.
Next low tide (tomorrow) : 2:11 am (0.4 ft)
Next high tide : in 1h 49m at 8:10 pm (2.4 ft)
Sunset today : 7:32 pm
Sunrise tomorrow : 5:56 am
Moon phase : First Quarter (65% illuminated)
Tide Station Location : Station #8447675
Common Questions About Tides

Osterville, MA Tides - Sep 1937

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed9:552.410:142.73:080.13:240.26:077:15Waning Crescent1Wed
2Thu10:572.511:152.84:090.04:250.16:087:14Waning Crescent2Thu
3Fri11:512.65:05-0.15:210.06:097:12New Moon3Fri
4Sat12:092.812:402.75:55-0.16:130.06:107:10New Moon4Sat
5Sun12:592.81:252.76:41-0.17:01-0.16:117:09New Moon5Sun
6Mon1:462.82:082.77:25-0.17:460.06:127:07New Moon6Mon
7Tue2:312.72:502.78:070.08:310.06:137:05Waxing Crescent7Tue
8Wed3:142.63:312.78:480.19:150.16:147:04Waxing Crescent8Wed
9Thu3:582.54:122.69:300.29:590.26:157:02Waxing Crescent9Thu
10Fri4:422.44:552.510:130.310:460.36:167:00Waxing Crescent10Fri
11Sat5:292.35:432.510:590.411:370.46:176:58First Quarter11Sat
12Sun6:212.26:342.411:490.56:186:57First Quarter12Sun
13Mon7:152.17:292.412:300.412:430.66:196:55First Quarter13Mon
14Tue8:112.18:242.41:250.41:370.66:206:53First Quarter14Tue
15Wed9:062.19:192.42:190.42:320.56:216:52Waxing Gibbous15Wed
16Thu9:592.210:122.53:120.43:260.56:226:50Waxing Gibbous16Thu
17Fri10:472.311:012.64:020.34:170.36:236:48Waxing Gibbous17Fri
18Sat11:302.511:462.74:470.25:040.26:246:46Waxing Gibbous18Sat
19Sun12:112.65:300.15:490.06:256:45Full Moon19Sun
20Mon12:302.712:522.86:120.06:34-0.16:266:43Full Moon20Mon
21Tue1:142.81:332.96:54-0.17:20-0.26:276:41Full Moon21Tue
22Wed1:592.82:172.97:38-0.18:07-0.36:286:39Waning Gibbous22Wed
23Thu2:462.83:033.08:24-0.18:56-0.36:296:38Waning Gibbous23Thu
24Fri3:362.73:523.09:11-0.19:47-0.26:306:36Waning Gibbous24Fri
25Sat4:282.64:442.910:030.010:42-0.16:316:34Third Quarter25Sat
26Sun4:252.54:422.89:590.110:420.05:325:33Third Quarter26Sun
27Mon5:272.45:462.711:000.211:450.05:335:31Third Quarter27Mon
28Tue6:332.46:522.712:040.35:345:29Third Quarter28Tue
29Wed7:392.48:002.612:490.11:090.35:365:27Waning Crescent29Wed
30Thu8:442.59:062.61:530.12:140.25:375:26Waning Crescent30Thu
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8447675)

Common Questions About Osterville, MA Tides

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What time does the tide turn (slack tide) in Osterville, MA today?

Slack tide in Osterville, MA is approximately 11:10 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 Osterville, MA?

Osterville, 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 Osterville, 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 Osterville, MA?

Tide predictions for Osterville, 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 Osterville, MA?

Tide data for Osterville, MA is sourced from NOAA Station #8447675. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8447675.

What is the moon phase in Osterville, MA tonight?

Tonight the moon over Osterville, MA is First Quarter (65% illuminated). This places Osterville, 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