Tides Today & Tomorrow in Falmouth Harbor, MA

TIDE TIMES for Tuesday, August 18, 2026
The tide is currently rising in Falmouth Harbor, MA.
Next low tide : 10:25 pm (0.1 ft)
Next high tide : in 3h 56m at 3:59 pm (1.4 ft)
Sunset today : 7:37 pm
Sunrise tomorrow : 5:54 am
Moon phase : First Quarter (36% illuminated)
Tide Station Location : Station #8447865
Common Questions About Tides

Falmouth Harbor, MA Tides - Sep 1962

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat12:571.41:201.47:150.17:310.16:087:16Waxing Crescent1Sat
2Sun1:351.41:571.47:520.18:110.16:097:15Waxing Crescent2Sun
3Mon2:141.32:341.38:300.18:520.16:107:13Waxing Crescent3Mon
4Tue2:551.33:131.39:090.29:350.26:117:11Waxing Crescent4Tue
5Wed3:381.33:551.39:520.210:220.26:127:10First Quarter5Wed
6Thu4:251.24:421.310:380.211:120.26:137:08First Quarter6Thu
7Fri5:161.25:321.311:280.26:147:06First Quarter7Fri
8Sat6:101.26:261.312:060.212:210.26:157:05First Quarter8Sat
9Sun7:061.27:221.41:020.21:170.26:167:03Waxing Gibbous9Sun
10Mon8:041.28:201.41:590.12:140.26:177:01Waxing Gibbous10Mon
11Tue9:001.39:161.52:550.03:110.16:186:59Waxing Gibbous11Tue
12Wed9:531.410:101.63:490.04:060.06:196:58Full Moon12Wed
13Thu10:441.511:031.64:40-0.14:59-0.16:206:56Full Moon13Thu
14Fri11:331.611:551.75:30-0.25:51-0.26:216:54Full Moon14Fri
15Sat12:231.66:19-0.26:43-0.26:226:52Full Moon15Sat
16Sun12:481.61:141.67:09-0.27:36-0.26:236:51Waning Gibbous16Sun
17Mon1:421.62:051.67:59-0.28:29-0.26:246:49Waning Gibbous17Mon
18Tue2:361.52:581.68:50-0.19:24-0.16:256:47Waning Gibbous18Tue
19Wed3:331.53:531.59:440.010:23-0.16:266:46Third Quarter19Wed
20Thu4:331.44:531.510:420.111:240.06:276:44Third Quarter20Thu
21Fri5:371.35:551.411:420.16:286:42Third Quarter21Fri
22Sat6:421.36:591.412:280.112:440.26:296:40Third Quarter22Sat
23Sun7:461.38:031.41:310.11:460.26:306:39Waning Crescent23Sun
24Mon8:461.39:011.42:330.12:470.26:316:37Waning Crescent24Mon
25Tue9:381.39:521.43:280.13:400.26:326:35Waning Crescent25Tue
26Wed10:221.310:351.44:140.14:260.16:336:33Waning Crescent26Wed
27Thu11:011.411:151.44:540.15:080.16:346:32New Moon27Thu
28Fri11:361.411:531.45:310.15:470.16:356:30New Moon28Fri
29Sat12:111.46:070.16:250.16:366:28New Moon29Sat
30Sun12:301.412:461.46:430.17:030.16:376:27New Moon30Sun
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8447865)

Common Questions About Falmouth Harbor, MA Tides

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

Slack tide in Falmouth Harbor, MA is approximately 7:12 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 Falmouth Harbor, MA?

Falmouth Harbor, 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 Falmouth Harbor, 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 Falmouth Harbor, MA?

Tide predictions for Falmouth Harbor, 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 Falmouth Harbor, MA?

Tide data for Falmouth Harbor, MA is sourced from NOAA Station #8447865. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8447865.

What is the moon phase in Falmouth Harbor, MA tonight?

Tonight the moon over Falmouth Harbor, MA is First Quarter (36% illuminated). This places Falmouth Harbor, 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