Onset Beach, Onset Bay tide times

1. Low tide2:44 AM-0.1 ft
2. High tide8:39 AM4.3 ft
3. Low tide3:15 PM0.0 ft
4. High tide8:58 PM4.1 ft

Feet above mean lower low water. Times are Eastern Daylight Time. NOAA predicts this station’s highs and lows only; the curve is drawn between them. Sunrise 6:34 AM, sunset 6:33 PM.

• Coastal Flood Advisory Coastal Flood Advisory issued September 26 at 2:08PM EDT until September 27 at 8:00PM EDT by NWS Boston/Norton MAUntil Sun 8:00 PM
  Full text

  * WHAT...Up to one half foot of inundation above ground level in low-lying areas near shorelines and tidal waterways (4.9 to 7.1 feet Mean Lower Low Water). * WHERE...Washington, Southern Bristol MA, Southern Plymouth MA, Southeast Providence RI, Eastern Kent RI, Bristol RI, and Newport RI Counties. * WHEN...Until 8 PM EDT Sunday. * IMPACTS...Splashover and Minor coastal flooding is expected in the lowest lying areas along the south coast of Rhode Island and Massachusetts over multiple high tide cycles late today through this weekend. A few immediate coastal roads may briefly flood due to wave action. In addition...minor beach erosion is also possible.

  If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.

Next moon phases: full moon Sat, Sep 26, last quarter Sat, Oct 3.

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The calendar holds every high and low for the next three months and keeps itself three months ahead.

Heights are feet above mean lower low water (MLLW): the average of the lower of each day’s two low tides over NOAA’s 19-year tidal epoch, and the zero of US tide tables and nautical charts. A low tide below that average is printed as a negative height.

Predictions are astronomical. They account for the moon and the sun, not the weather: onshore wind, low air pressure and high river flow hold the water above the prediction, offshore wind and high pressure hold it below.

Spring tides, the largest ranges of the month, follow the new and full moon by a day or two. Neap tides, the smallest, follow the quarter moons.

NOAA predicts the tide here from Newport (8452660), 38 mi away: high tide comes 41 minutes later, low tide 85 minutes later; 1.03 times the height at high tide and 1.03 times the height at low tide. The times and heights above include those corrections.

• Gray GablesTide predictions1.9 mi
• Cape Cod Canal, RR. bridgeTide predictions2.1 mi
• Monument BeachTide predictions2.8 mi
• Cape Cod Canal, Bourne BridgeTide predictions3.4 mi
• Great HillTide predictions3.6 mi
• Piney PointTide predictions4.5 mi
• Cape Cod Canal, BournedaleTide predictions5.3 mi
• Marion, Sippican HarborTide predictions5.9 mi

• Forecast for Onset, MA
• Live radar at this station
• Bristol Area Beaches beach forecast
• September 2026 tide table
• October 2026 tide table
• November 2026 tide table
• December 2026 tide table
• Sea level rise on the map at this station
• Sea level rise and high tide flooding at Woods Hole (15 mi away)
• All tide stations in Massachusetts

Tide predictions and water levels from NOAA’s Center for Operational Oceanographic Products and Services (CO-OPS). Coastal flood, storm surge and high surf products from the National Weather Service. Station 8447277: original at NOAA.