Tides Today & Tomorrow in Harwich Port, MA

TIDE TIMES for Monday, August 17, 2026
The tide is currently rising in Harwich Port, MA.
Next low tide : 10:07 pm (0.2 ft)
Next high tide : in 56m at 4:21 pm (4.0 ft)
Sunset today : 7:37 pm
Sunrise tomorrow : 5:51 am
Moon phase : Waxing Crescent (27% illuminated)
Tide Station Location : Station #8447506
Common Questions About Tides

Harwich Port, MA Tides - Dec 2013

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun9:594.310:343.83:210.13:58-0.36:484:10New Moon1Sun
2Mon10:474.511:233.94:100.04:47-0.56:494:10New Moon2Mon
3Tue11:354.64:59-0.25:37-0.66:504:10New Moon3Tue
4Wed12:144.012:264.75:49-0.26:27-0.76:514:10Waxing Crescent4Wed
5Thu1:064.11:194.66:41-0.27:19-0.66:524:10Waxing Crescent5Thu
6Fri2:004.12:134.57:35-0.28:11-0.66:534:10Waxing Crescent6Fri
7Sat2:544.03:094.48:30-0.19:06-0.46:534:09Waxing Crescent7Sat
8Sun3:514.04:094.19:290.010:03-0.26:544:09First Quarter8Sun
9Mon4:513.95:123.910:310.111:02-0.16:554:09First Quarter9Mon
10Tue5:523.96:173.711:350.26:564:09First Quarter10Tue
11Wed6:533.97:223.612:010.112:390.26:574:10Waxing Gibbous11Wed
12Thu7:533.98:263.512:590.21:420.26:584:10Waxing Gibbous12Thu
13Fri8:493.99:253.51:570.32:420.16:584:10Waxing Gibbous13Fri
14Sat9:414.010:173.52:510.33:350.06:594:10Waxing Gibbous14Sat
15Sun10:274.011:023.53:410.34:220.07:004:10Full Moon15Sun
16Mon11:084.011:443.54:250.35:040.07:014:11Full Moon16Mon
17Tue11:484.05:070.35:440.07:014:11Full Moon17Tue
18Wed12:243.512:274.05:470.36:230.07:024:11Full Moon18Wed
19Thu1:033.51:063.96:280.47:010.07:024:12Waning Gibbous19Thu
20Fri1:423.51:463.97:080.47:400.17:034:12Waning Gibbous20Fri
21Sat2:213.52:263.87:490.48:190.17:034:13Waning Gibbous21Sat
22Sun3:003.53:073.78:320.59:000.27:044:13Waning Gibbous22Sun
23Mon3:423.53:513.69:170.59:430.37:044:14Third Quarter23Mon
24Tue4:253.54:393.510:050.510:290.37:054:14Third Quarter24Tue
25Wed5:113.55:293.410:570.511:170.47:054:15Third Quarter25Wed
26Thu5:593.66:233.411:500.47:064:16Third Quarter26Thu
27Fri6:503.77:193.412:080.412:450.37:064:16Waning Crescent27Fri
28Sat7:423.98:173.41:010.31:420.17:064:17Waning Crescent28Sat
29Sun8:374.19:143.61:560.22:39-0.17:064:18Waning Crescent29Sun
30Mon9:314.310:093.72:510.13:33-0.37:064:19Waning Crescent30Mon
31Tue10:244.511:043.93:45-0.14:26-0.57:074:19New Moon31Tue
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8447506)

Common Questions About Harwich Port, MA Tides

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

Slack tide in Harwich Port, MA is approximately 7:14 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 Harwich Port, MA?

Harwich Port, MA is currently in a transitional phase. Tonight's moon is 27% 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 Harwich Port, 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 Harwich Port, MA?

Tide predictions for Harwich Port, 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 Harwich Port, MA?

Tide data for Harwich Port, MA is sourced from NOAA Station #8447506. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8447506.

What is the moon phase in Harwich Port, MA tonight?

Tonight the moon over Harwich Port, MA is Waxing Crescent (27% illuminated). This places Harwich Port, 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