Southwest Ledge tidal current predictions

Now

Flood 0.7 ktToward NW (321°)

Next slack

11:13 PMEDT

Next max flood

1.9 ktSat 8:08 AM

Next max ebb

2.2 ktSat 2:08 AM

Knots along the channel: above the line the flood, running in toward NW (321°); below it the ebb, running out toward SE (141°). Times are Eastern Daylight Time. Today: ebb 2.0 kt 1:27 AM, slack 4:39 AM, flood 1.7 kt 7:29 AM, slack 10:51 AM, ebb 2.3 kt 1:50 PM, slack 5:05 PM, flood 1.8 kt 7:49 PM, slack 11:13 PM.

• Storm Warning Storm Warning issued September 25 at 2:58PM EDT until September 27 at 2:00AM EDT by NWS Boston/Norton MAUntil Sun 2:00 AM
  Full text

  * WHAT...Northeast winds 25 to 35 kt with gusts up to 55 kt and seas 6 to 11 feet. * WHERE...Rhode Island Sound and Block Island Sound. * WHEN...Until 2 AM EDT Sunday. * 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.

• Southwest Ledge, 2.0 miles west ofSubordinate current station0.9 mi
• Lewis Pt., 1.5 miles west ofSubordinate current station4.2 mi
• Lewis Pt., 1.0 mile southwest ofSubordinate current station4.3 mi
• Lewis Point, 6.0 miles WNW ofSubordinate current station5.6 mi
• Montauk Point, 5.4 miles NNE ofSubordinate current station7.1 mi
• Montauk Point, 1.2 miles east ofSubordinate current station7.4 mi
• Great Salt Pond ent., 1 mile NW ofSubordinate current station7.8 mi
• Great Salt Pond entranceSubordinate current station8.0 mi

• Tide times at Southwest Point, Block Island 5.7 mi
• Tide times at Block Island (Old Harbor) 8.4 mi
• Tide times at Lake Montauk 13 mi
• Forecast for New Shoreham, RI
• Open the live map with tidal currents
• All tidal current stations in Rhode Island

Tidal current predictions from NOAA’s Center for Operational Oceanographic Products and Services (CO-OPS), station ACT2371, bin 1: original at NOAA. Marine alerts from the National Weather Service.