Tides Today & Tomorrow in Chelsea, MA

TIDE TIMES for Wednesday, August 19, 2026
The tide is currently falling in Chelsea, MA.
Next low tide : in 3h 10m at 11:25 pm (1.1 ft)
Next high tide (tomorrow) : 5:41 am (8.4 ft)
Sunset today : 7:39 pm
Sunrise tomorrow : 5:55 am
Moon phase : First Quarter (46% illuminated)
Tide Station Location : Station #8443725
Common Questions About Tides

Chelsea, MA Tides - Mar 1944

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed5:0310.65:389.411:20-0.211:390.57:196:33First Quarter1Wed
2Thu6:0310.16:438.912:190.37:176:35First Quarter2Thu
3Fri7:069.87:498.612:371.11:210.67:156:36First Quarter3Fri
4Sat8:099.68:528.51:381.42:230.87:146:37Waxing Gibbous4Sat
5Sun9:079.59:468.62:361.53:200.97:126:38Waxing Gibbous5Sun
6Mon9:599.510:358.73:311.54:100.87:116:39Waxing Gibbous6Mon
7Tue10:459.611:168.84:201.44:540.77:096:41Waxing Gibbous7Tue
8Wed11:269.611:528.95:031.35:330.67:076:42Full Moon8Wed
9Thu12:029.65:441.16:090.67:056:43Full Moon9Thu
10Fri12:259.112:379.76:220.96:450.57:046:44Full Moon10Fri
11Sat12:589.31:119.67:000.77:210.57:026:45Full Moon11Sat
12Sun1:319.51:479.67:380.67:580.57:006:46Waning Gibbous12Sun
13Mon2:069.62:269.58:190.58:380.76:596:48Waning Gibbous13Mon
14Tue2:449.73:089.39:020.59:210.86:576:49Waning Gibbous14Tue
15Wed3:269.73:539.19:490.510:071.06:556:50Waning Gibbous15Wed
16Thu4:129.74:448.910:400.510:571.26:536:51Third Quarter16Thu
17Fri5:039.75:418.711:340.611:521.36:526:52Third Quarter17Fri
18Sat6:019.86:448.712:330.56:506:53Third Quarter18Sat
19Sun7:059.97:498.912:521.31:340.36:486:55Waning Crescent19Sun
20Mon8:0910.38:509.41:531.02:33-0.16:476:56Waning Crescent20Mon
21Tue9:1010.79:4810.02:530.53:31-0.56:456:57Waning Crescent21Tue
22Wed10:0811.210:4210.63:51-0.14:26-0.96:436:58Waning Crescent22Wed
23Thu11:0411.511:3411.14:47-0.75:18-1.36:416:59New Moon23Thu
24Fri11:5711.75:40-1.26:08-1.56:407:00New Moon24Fri
25Sat12:2311.612:4811.76:31-1.56:56-1.46:387:01New Moon25Sat
26Sun1:1111.81:3811.47:22-1.67:43-1.26:367:02Waxing Crescent26Sun
27Mon1:5911.72:2911.08:12-1.48:32-0.76:347:04Waxing Crescent27Mon
28Tue2:4911.53:2110.59:04-1.19:22-0.16:337:05Waxing Crescent28Tue
29Wed3:4011.04:149.89:56-0.610:150.56:317:06First Quarter29Wed
30Thu4:3210.55:109.310:510.011:091.16:297:07First Quarter30Thu
31Fri5:299.96:118.811:470.56:277:08First Quarter31Fri
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 2:33 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 46% 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 (46% 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