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 6h 15m 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 - Jan 1938

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat12:002.312:032.65:200.35:550.07:084:21New Moon1Sat
2Sun12:392.312:422.65:590.26:330.07:084:22New Moon2Sun
3Mon1:162.31:202.66:390.27:100.07:084:23New Moon3Mon
4Tue1:542.31:582.67:190.27:480.07:084:24Waxing Crescent4Tue
5Wed2:312.42:372.68:000.28:260.07:084:25Waxing Crescent5Wed
6Thu3:092.43:182.58:420.29:070.07:084:26Waxing Crescent6Thu
7Fri3:492.44:022.59:270.29:500.17:084:27Waxing Crescent7Fri
8Sat4:322.44:512.410:160.210:380.17:084:28First Quarter8Sat
9Sun5:202.55:452.311:100.211:290.17:084:29First Quarter9Sun
10Mon6:132.56:432.312:080.17:074:30First Quarter10Mon
11Tue7:092.67:452.312:250.11:080.17:074:31Waxing Gibbous11Tue
12Wed8:082.78:482.31:230.12:100.07:074:32Waxing Gibbous12Wed
13Thu9:092.89:512.42:230.13:10-0.27:074:33Waxing Gibbous13Thu
14Fri10:082.910:492.53:230.04:08-0.37:064:34Full Moon14Fri
15Sat11:053.011:452.64:21-0.15:03-0.47:064:35Full Moon15Sat
16Sun12:003.15:16-0.25:55-0.57:054:36Full Moon16Sun
17Mon12:392.712:543.16:09-0.36:46-0.57:054:38Full Moon17Mon
18Tue1:312.81:473.07:02-0.37:36-0.47:044:39Waning Gibbous18Tue
19Wed2:222.82:392.97:54-0.28:25-0.37:044:40Waning Gibbous19Wed
20Thu3:122.73:312.78:46-0.19:13-0.27:034:41Waning Gibbous20Thu
21Fri4:012.74:242.59:400.010:040.07:034:42Third Quarter21Fri
22Sat4:532.65:192.410:350.110:560.17:024:44Third Quarter22Sat
23Sun5:462.56:162.211:330.211:500.37:014:45Third Quarter23Sun
24Mon6:412.47:162.112:310.37:004:46Third Quarter24Mon
25Tue7:372.48:162.112:440.41:310.37:004:47Waning Crescent25Tue
26Wed8:332.49:142.11:390.42:300.36:594:49Waning Crescent26Wed
27Thu9:272.410:062.12:340.43:230.26:584:50Waning Crescent27Thu
28Fri10:162.510:522.23:250.44:090.26:574:51Waning Crescent28Fri
29Sat10:592.511:332.24:110.34:500.16:564:52New Moon29Sat
30Sun11:392.64:540.25:280.06:554:54New Moon30Sun
31Mon12:112.312:182.65:340.26:050.06:544:55New Moon31Mon
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