Tides Today & Tomorrow in Osterville, MA

TIDE TIMES for Friday, August 21, 2026
The tide is currently falling in Osterville, MA.
Next low tide : in 24m at 1:13 am (0.4 ft)
Next high tide : 7:57 am (2.1 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 - Apr 1939

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat9:372.710:102.72:510.03:25-0.25:256:05Waxing Gibbous1Sat
2Sun10:352.811:032.93:50-0.24:19-0.25:236:06Full Moon2Sun
3Mon11:292.911:522.94:45-0.35:09-0.35:226:08Full Moon3Mon
4Tue12:212.95:36-0.45:58-0.35:206:09Full Moon4Tue
5Wed12:403.01:112.86:26-0.46:45-0.25:186:10Full Moon5Wed
6Thu1:283.02:002.77:15-0.47:32-0.15:176:11Waning Gibbous6Thu
7Fri2:142.92:492.68:03-0.38:190.05:156:12Waning Gibbous7Fri
8Sat3:012.83:372.58:51-0.19:060.25:136:13Waning Gibbous8Sat
9Sun3:492.64:282.49:410.09:570.35:126:14Third Quarter9Sun
10Mon4:402.55:222.310:340.210:510.45:106:15Third Quarter10Mon
11Tue5:352.46:182.211:290.311:470.55:086:16Third Quarter11Tue
12Wed6:322.37:152.212:250.45:076:17Third Quarter12Wed
13Thu7:302.38:102.212:440.51:200.45:056:18Third Quarter13Thu
14Fri8:282.39:032.31:400.52:120.45:046:19Waning Crescent14Fri
15Sat9:212.39:502.42:350.43:010.35:026:21Waning Crescent15Sat
16Sun10:092.410:312.53:250.33:460.35:006:22Waning Crescent16Sun
17Mon10:532.511:102.64:090.24:270.24:596:23Waning Crescent17Mon
18Tue11:332.511:472.64:510.15:060.14:576:24New Moon18Tue
19Wed12:132.55:320.05:450.14:566:25New Moon19Wed
20Thu12:252.712:542.66:13-0.16:260.14:546:26New Moon20Thu
21Fri1:042.81:352.66:55-0.17:070.14:536:27Waxing Crescent21Fri
22Sat1:452.82:192.57:38-0.27:510.14:516:28Waxing Crescent22Sat
23Sun2:282.83:052.58:24-0.18:380.14:506:29Waxing Crescent23Sun
24Mon3:162.83:552.59:13-0.19:290.24:486:30Waxing Crescent24Mon
25Tue4:072.74:502.510:07-0.110:260.24:476:31First Quarter25Tue
26Wed5:052.75:492.511:050.011:270.24:456:33First Quarter26Wed
27Thu6:082.66:512.512:040.04:446:34First Quarter27Thu
28Fri7:122.67:532.612:300.21:050.04:436:35Waxing Gibbous28Fri
29Sat8:182.68:532.71:330.12:040.04:416:36Waxing Gibbous29Sat
30Sun10:212.710:502.83:360.04:020.05:407:37Waxing Gibbous30Sun
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 4:35 am — 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