Tides Today & Tomorrow in Chelsea, MA

TIDE TIMES for Tuesday, July 21, 2026
The tide is currently falling in Chelsea, MA.
Next low tide (tomorrow) : in 1h 06m at 12:04 am (1.0 ft)
Next high tide (tomorrow) : 6:22 am (8.7 ft)
Sunset today : 8:14 pm
Sunrise tomorrow : 5:26 am
Moon phase : First Quarter (52% illuminated)
Tide Station Location : Station #8443725
Common Questions About Tides

Chelsea, MA Tides - Mar 2061

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue6:4810.27:378.712:221.11:130.16:185:34Waxing Gibbous1Tue
2Wed7:5510.38:419.01:271.12:170.16:165:35Waxing Gibbous2Wed
3Thu8:5610.49:389.22:301.03:160.06:145:36Waxing Gibbous3Thu
4Fri9:5210.510:289.53:280.74:08-0.16:135:38Full Moon4Fri
5Sat10:4110.511:119.74:200.54:52-0.26:115:39Full Moon5Sat
6Sun11:2510.311:509.85:060.45:32-0.16:095:40Full Moon6Sun
7Mon12:0510.15:470.36:090.16:085:41Full Moon7Mon
8Tue12:269.812:439.86:270.36:460.46:065:42Waning Gibbous8Tue
9Wed1:019.81:219.57:070.47:240.76:045:44Waning Gibbous9Wed
10Thu1:379.72:019.17:490.58:051.16:035:45Waning Gibbous10Thu
11Fri2:159.52:438.78:330.88:481.56:015:46Waning Gibbous11Fri
12Sat2:579.33:298.39:201.09:341.85:595:47Third Quarter12Sat
13Sun4:439.05:207.911:111.311:252.26:576:48Third Quarter13Sun
14Mon5:368.86:187.612:061.56:566:49Third Quarter14Mon
15Tue6:358.77:217.612:202.41:041.66:546:51Third Quarter15Tue
16Wed7:368.88:217.81:182.42:021.56:526:52Waning Crescent16Wed
17Thu8:349.09:148.22:152.22:561.26:516:53Waning Crescent17Thu
18Fri9:269.410:028.73:091.83:460.86:496:54Waning Crescent18Fri
19Sat10:159.910:469.34:001.24:330.36:476:55Waning Crescent19Sat
20Sun11:0110.311:2810.04:480.65:17-0.16:456:56New Moon20Sun
21Mon11:4710.65:35-0.16:00-0.46:446:57New Moon21Mon
22Tue12:1010.612:3310.86:21-0.76:43-0.66:426:59New Moon22Tue
23Wed12:5311.11:1910.97:08-1.17:27-0.66:407:00Waxing Crescent23Wed
24Thu1:3811.52:0810.77:57-1.38:14-0.56:387:01Waxing Crescent24Thu
25Fri2:2611.63:0010.48:48-1.39:05-0.16:377:02Waxing Crescent25Fri
26Sat3:1711.43:569.99:43-1.09:590.36:357:03Waxing Crescent26Sat
27Sun4:1411.14:569.410:42-0.610:580.76:337:04First Quarter27Sun
28Mon5:1510.76:039.011:43-0.16:317:05First Quarter28Mon
29Tue6:2310.37:158.912:011.112:490.26:307:07First Quarter29Tue
30Wed7:3610.18:259.01:081.31:560.46:287:08Waxing Gibbous30Wed
31Thu8:4310.09:269.32:151.32:590.46:267:09Waxing Gibbous31Thu
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 3:13 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 neap phase. Tonight's moon is 52% 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 minimum.

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 First Quarter (52% illuminated). This places Chelsea, MA in a neap tide cycle, so tidal ranges are near their weekly minimum 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