Northeast Grave tidal current predictions

Now

Flood 0.1 ktToward WSW (251°)

Next slack

11:49 PMEDT

Next max flood

0.3 ktSat 8:44 AM

Next max ebb

0.4 ktSat 3:48 AM

Knots along the channel: above the line the flood, running in toward WSW (251°); below it the ebb, running out toward E (86°). Times are Eastern Daylight Time. Today: ebb 0.4 kt 3:14 AM, slack 5:38 AM, flood 0.3 kt 8:32 AM, slack 12:01 PM, ebb 0.6 kt 4:07 PM, slack 7:59 PM, flood 0.1 kt 9:53 PM, slack 11:49 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.

• The Graves, 0.3 nmi SSE ofSubordinate current station0.8 mi
• Nahant, 1 nmi SE of East PointSubordinate current station1.8 mi
• Hypocrite ChannelSubordinate current station2.3 mi
• Little Calf Island, 0.4 nmi NW ofSubordinate current station2.4 mi
• South Channel Aldridge LedgeHarmonic current station3.0 mi
• Little Brewster Island, 1.5 nmi E ofSubordinate current station3.0 mi
• Finn's Ledge Bell, 0.2 nmi west ofSubordinate current station3.2 mi
• Calf Island, 0.4 nmi west ofSubordinate current station3.2 mi

• Tide times at Boston Light 3.4 mi
• Tide times at Deer Island (south end) 5.3 mi
• Tide times at Hull 5.6 mi
• Forecast for Nahant, 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 BOS1106, bin 12: original at NOAA. Marine alerts from the National Weather Service.