Gloucester Harbor entrance tidal current predictions

Now

SlackTurning

Next slack

10:20 PMEDT

Next max flood

0.3 ktSat 8:06 AM

Next max ebb

0.2 ktSat 1:42 AM

Knots along the channel: above the line the flood, running in toward NNW (340°); below it the ebb, running out toward SSW (195°). Times are Eastern Daylight Time. Today: ebb 0.2 kt 1:04 AM, slack 4:14 AM, flood 0.2 kt 7:47 AM, slack 10:14 AM, ebb 0.2 kt 1:29 PM, slack 4:36 PM, flood 0.2 kt 7:43 PM, slack 10:20 PM.

• Storm Warning Storm Warning issued September 25 at 2:58PM EDT until September 26 at 8:00PM EDT by NWS Boston/Norton MAUntil Sat 8:00 PM
  Full text

  * WHAT...Northeast winds 25 to 35 kt with gusts up to 50 kt and seas 16 to 21 feet. * WHERE...In Massachusetts coastal waters, Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary and Massachusetts Bay and Ipswich Bay. In Atlantic coastal waters, Ocean Waters from the Merrimack River to Plymouth from 40 to 60 NM. * WHEN...Until 8 PM EDT Saturday. * IMPACTS...Storm force winds and hazardous seas will capsize or damage vessels and reduce visibility.

  Mariners should remain in port, 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.

• Blynman Canal ent., Gloucester HarborSubordinate current station2.0 mi
• Annisquam Harbor LightSubordinate current station6.0 mi
• Little Misery IslandHarmonic current station6.9 mi
• Haste ShoalHarmonic current station9.1 mi
• Marblehead ChannelHarmonic current station9.3 mi
• Plum Island Sound entranceSubordinate current station10 mi
• Fort Pickering, 0.2nm south ofHarmonic current station11 mi
• Nahant, 1.8 nmi NE of East PointSubordinate current station14 mi

• Tide times at Gloucester Harbor 2.1 mi
• Tide times at Annisquam, Lobster Cove 5.1 mi
• Tide times at Rockport 6.1 mi
• Forecast for Gloucester, 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 ACT0836, bin 1: original at NOAA. Marine alerts from the National Weather Service.