Ted William Tunnel tidal current predictions

Now

SlackTurning

Next slack

5:48 AMEDT

Next max flood

0.3 kt9:29 AM

Next max ebb

0.3 kt3:38 AM

Knots along the channel: above the line the flood, running in toward NW (312°); below it the ebb, running out toward SE (124°). Times are Eastern Daylight Time. Today: slack 12:11 AM, ebb 0.3 kt 3:38 AM, slack 5:48 AM, flood 0.3 kt 9:29 AM, slack 12:30 PM, ebb 0.3 kt 4:04 PM, slack 6:25 PM, flood 0.4 kt 9:53 PM.

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

  * WHAT...Northeast winds 20 to 25 kt with gusts up to 50 kt and waves around 3 feet. * WHERE...In Massachusetts coastal waters, Boston Harbor. In Rhode Island coastal waters, Narragansett Bay. * WHEN...Until 8 PM EDT Saturday. * IMPACTS...Storm force winds and hazardous waves 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.

• South Boston, Pier 4, 0.2 nmi NNE ofSubordinate current station0.2 mi
• Castle islandCurrent meter (NOAA PORTS)1.0 mi
• Fort Independence, 0.1nm north ofHarmonic current station1.1 mi
• Fort Independence, 0.3 nmi east ofSubordinate current station1.5 mi
• Boston Channel Light No.5Harmonic current station1.7 mi
• Thompson Island, 0.7 nmi NNE ofSubordinate current station1.9 mi
• East Boston, Pier 10, southeast ofSubordinate current station2.0 mi
• Snake Island, southwest ofSubordinate current station2.1 mi

• Tide times at Boston 1.2 mi
• Tide times at Charlestown, Charles River entrance 2.0 mi
• Tide times at Chelsea St. Bridge, Chelsea River 2.4 mi
• Forecast for Boston Seaport, 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 BOS1115, bin 7: original at NOAA. Marine alerts from the National Weather Service.