Tides Today & Tomorrow in Osterville, MA

TIDE TIMES for Tuesday, August 18, 2026
The tide is currently falling in Osterville, MA.
Next low tide : in 3h 45m at 11:21 pm (0.2 ft)
Next high tide (tomorrow) : 6:05 am (2.3 ft)
Sunset today : 7:37 pm
Sunrise tomorrow : 5:53 am
Moon phase : First Quarter (36% illuminated)
Tide Station Location : Station #8447675
Common Questions About Tides

Osterville, MA Tides - Aug 1945

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed6:542.67:222.812:140.012:350.05:357:59Third Quarter1Wed
2Thu7:562.58:212.81:150.01:330.15:367:58Third Quarter2Thu
3Fri9:002.49:212.82:170.02:320.25:377:57Waning Crescent3Fri
4Sat10:052.410:222.83:200.03:320.25:387:56Waning Crescent4Sat
5Sun11:072.411:202.84:210.04:310.25:397:55Waning Crescent5Sun
6Mon12:032.55:17-0.15:260.25:407:54New Moon6Mon
7Tue12:132.812:542.56:09-0.16:170.25:417:52New Moon7Tue
8Wed1:032.81:412.56:56-0.17:050.25:427:51New Moon8Wed
9Thu1:502.82:262.57:41-0.17:510.25:437:50New Moon9Thu
10Fri2:352.73:082.58:230.08:350.25:447:48Waxing Crescent10Fri
11Sat3:182.73:482.59:040.19:190.25:457:47Waxing Crescent11Sat
12Sun4:012.64:282.59:440.110:030.35:467:46Waxing Crescent12Sun
13Mon4:442.55:102.410:260.210:490.35:477:44Waxing Crescent13Mon
14Tue5:302.45:542.411:090.311:380.45:487:43First Quarter14Tue
15Wed6:192.36:402.411:560.45:497:42First Quarter15Wed
16Thu7:102.27:302.412:290.412:440.55:507:40First Quarter16Thu
17Fri8:042.18:212.41:220.41:350.55:517:39First Quarter17Fri
18Sat8:592.19:132.42:160.42:270.55:527:37Waxing Gibbous18Sat
19Sun9:552.110:062.53:110.43:210.55:547:36Waxing Gibbous19Sun
20Mon10:482.210:572.64:050.34:130.45:557:34Waxing Gibbous20Mon
21Tue11:372.311:462.74:540.15:030.35:567:33Waxing Gibbous21Tue
22Wed12:232.45:410.05:510.25:577:31Full Moon22Wed
23Thu12:332.81:082.66:27-0.16:390.05:587:30Full Moon23Thu
24Fri1:202.91:532.77:12-0.27:28-0.15:597:28Full Moon24Fri
25Sat2:083.02:392.87:58-0.38:17-0.26:007:27Waning Gibbous25Sat
26Sun2:583.03:272.98:45-0.39:08-0.26:017:25Waning Gibbous26Sun
27Mon3:492.94:152.99:32-0.210:00-0.26:027:23Waning Gibbous27Mon
28Tue4:412.85:072.910:23-0.110:56-0.16:037:22Third Quarter28Tue
29Wed5:382.76:022.811:170.011:55-0.16:047:20Third Quarter29Wed
30Thu6:392.57:012.812:140.16:057:19Third Quarter30Thu
31Fri7:432.48:032.712:580.01:140.26:067:17Third Quarter31Fri
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 2:43 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 36% 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 (36% 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