Newburyport, Merrimack River tidal current predictions

Now

Ebb 1.0 ktToward E (98°)

Next slack

7:15 PMEDT

Next max flood

1.5 kt10:07 PM

Next max ebb

1.4 kt3:28 PM

Knots along the channel: above the line the flood, running in toward WNW (288°); below it the ebb, running out toward E (98°). Times are Eastern Daylight Time. Today: slack 12:36 AM, ebb 1.3 kt 2:53 AM, slack 6:51 AM, flood 1.5 kt 9:53 AM, slack 1:08 PM, ebb 1.4 kt 3:28 PM, slack 7:15 PM, flood 1.5 kt 10:07 PM.

• Gale Warning Gale Warning issued September 26 at 2:19PM EDT until September 27 at 8:00PM EDT by NWS Gray MEUntil Sun 8:00 PM
  Full text

  * WHAT...Northeast winds 20 to 30 kt with gusts up to 45 kt and seas 8 to 13 ft. * WHERE...Coastal Waters from Cape Elizabeth, ME to Merrimack River, MA out 25 NM. * WHEN...Until 8 PM EDT Sunday. * IMPACTS...Strong winds will cause hazardous seas which could capsize or damage vessels and reduce visibility.

  Mariners should alter plans to avoid these hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for severe conditions.

The flood is the tidal current running in from the sea, the ebb the current running back out. Slack water is the short turn between them, when the current is weakest: the time to cross a strong channel, anchor, or dive. Slack in a channel is not the time of high or low tide; it can come hours after.

Speeds are knots along the channel's main axis, and directions are degrees true toward which the water flows, as NOAA prints its tables. A current against the wind stands the waves up steep and close together.

Predictions are astronomical: the moon and the sun, not the weather. Strong wind, river flow after heavy rain and storm surge all change the real current. This is a subordinate station: NOAA predicts it from a nearby harmonic station by fixed corrections to the times and speeds of its slack waters and maxima, so the curve between them is less exact.

• Merrimack River entranceSubordinate current station3.0 mi
• Plum Island Sound entranceSubordinate current station8.5 mi
• Annisquam Harbor LightSubordinate current station14 mi
• Blynman Canal ent., Gloucester HarborSubordinate current station17 mi
• Odiornes Point, NNE ofSubordinate current station18 mi
• Odiornes Point, northeast ofSubordinate current station18 mi
• Little Harbor entranceHarmonic current station18 mi
• Gloucester Harbor entranceSubordinate current station19 mi

• Tide times at Newburyport 0.3 mi
• Tide times at Plum Island, Merrimack River Entrance 2.5 mi
• Tide times at Salisbury Point 2.7 mi
• Forecast for Newburyport, MA
• Open the live map with tidal currents
• All tidal current stations in Massachusetts

Tidal current predictions from NOAA’s Center for Operational Oceanographic Products and Services (CO-OPS), station ACT0821, bin 1: original at NOAA. Marine alerts from the National Weather Service.