Tides Today & Tomorrow in Chelsea, MA

TIDE TIMES for Wednesday, August 12, 2026
The tide is currently rising in Chelsea, MA.
Next low tide (tomorrow) : 6:10 am (-0.9 ft)
Next high tide : in 2h 21m at 11:53 pm (11.6 ft)
Sunset today : 7:49 pm
Sunrise tomorrow : 5:48 am
Moon phase : New Moon (0% illuminated)
Tide Station Location : Station #8443725
Common Questions About Tides

Chelsea, MA Tides - Jan 1955

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat3:529.94:169.510:120.510:330.37:134:21First Quarter1Sat
2Sun4:4710.15:179.211:100.311:290.47:134:22First Quarter2Sun
3Mon5:4610.46:229.112:110.07:134:23Waxing Gibbous3Mon
4Tue6:4710.77:279.212:280.51:12-0.37:134:24Waxing Gibbous4Tue
5Wed7:4711.08:289.41:270.42:12-0.67:134:25Waxing Gibbous5Wed
6Thu8:4611.39:279.62:250.33:10-1.07:134:26Waxing Gibbous6Thu
7Fri9:4211.510:239.93:220.04:06-1.27:134:27Full Moon7Fri
8Sat10:3711.711:1610.14:17-0.24:58-1.47:134:28Full Moon8Sat
9Sun11:2911.65:10-0.35:47-1.47:134:29Full Moon9Sun
10Mon12:0510.312:1811.46:00-0.36:34-1.27:124:30Waning Gibbous10Mon
11Tue12:5310.31:0711.06:50-0.27:21-0.97:124:31Waning Gibbous11Tue
12Wed1:4110.21:5610.57:400.08:08-0.57:124:32Waning Gibbous12Wed
13Thu2:2810.12:459.98:310.38:550.07:114:33Waning Gibbous13Thu
14Fri3:159.83:359.39:220.69:430.57:114:34Third Quarter14Fri
15Sat4:049.64:288.710:140.910:321.07:114:35Third Quarter15Sat
16Sun4:559.35:258.311:081.111:231.47:104:37Third Quarter16Sun
17Mon5:509.16:258.012:041.37:104:38Third Quarter17Mon
18Tue6:469.17:237.912:171.71:011.37:094:39Waning Crescent18Tue
19Wed7:399.18:177.91:101.91:541.27:084:40Waning Crescent19Wed
20Thu8:279.39:058.02:021.82:451.07:084:41Waning Crescent20Thu
21Fri9:139.59:498.22:511.73:310.87:074:43Waning Crescent21Fri
22Sat9:569.710:308.53:371.54:150.57:064:44New Moon22Sat
23Sun10:369.911:088.84:211.34:550.27:064:45New Moon23Sun
24Mon11:1510.111:459.25:030.95:34-0.17:054:46New Moon24Mon
25Tue11:5410.35:450.66:14-0.37:044:48New Moon25Tue
26Wed12:249.512:3610.46:280.36:55-0.47:034:49Waxing Crescent26Wed
27Thu1:049.91:2010.37:130.17:38-0.47:034:50Waxing Crescent27Thu
28Fri1:4810.22:0710.28:01-0.18:25-0.37:024:52Waxing Crescent28Fri
29Sat2:3510.42:599.98:53-0.29:14-0.17:014:53First Quarter29Sat
30Sun3:2610.53:559.59:49-0.210:080.27:004:54First Quarter30Sun
31Mon4:2110.54:569.210:47-0.111:050.46:594:55First Quarter31Mon
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8443725)

Common Questions About Chelsea, MA Tides

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

Slack tide in Chelsea, MA is approximately 3:01 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 Chelsea, MA?

Chelsea, MA is currently in a spring phase. Tonight's moon is 0% 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 near their weekly maximum.

What datum are Chelsea, 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 Chelsea, MA?

Tide predictions for Chelsea, 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 Chelsea, MA?

Tide data for Chelsea, MA is sourced from NOAA Station #8443725. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8443725.

What is the moon phase in Chelsea, MA tonight?

Tonight the moon over Chelsea, MA is New Moon (0% illuminated). This places Chelsea, MA in a spring tide cycle, so tidal ranges are near their weekly maximum 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