Pollock Rip Channel, east end tidal current predictions

Now

Flood 1.3 ktToward NE (53°)

Next slack

10:06 AMEDT

Next max flood

2.2 kt6:50 PM

Next max ebb

2.3 kt12:33 PM

Knots along the channel: above the line the flood, running in toward NE (53°); below it the ebb, running out toward SSW (212°). Times are Eastern Daylight Time. Today: ebb 2.2 kt 12:13 AM, slack 3:43 AM, flood 2.3 kt 6:34 AM, slack 10:06 AM, ebb 2.3 kt 12:33 PM, slack 4:02 PM, flood 2.2 kt 6:50 PM, slack 10:23 PM.

• Gale Warning Gale Warning issued September 27 at 2:21AM EDT until September 27 at 12:00PM EDT by NWS Boston/Norton MAUntil 12:00 PM
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  * WHAT...East winds 20 to 25 kt with gusts up to 35 kt and seas 9 to 12 feet. * WHERE...Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 NM. * WHEN...Until noon EDT today. * 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 hazardous conditions.

• Storm Warning The Storm Warning has been cancelled.Until 10:00 AM
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  The Storm Warning has been cancelled and is no longer in effect.

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

• Pollock Rip Channel (Butler Hole)Harmonic current station3.3 mi
• Monomoy Pt., channel 0.2 mile west ofSubordinate current station5.2 mi
• Stage Harbor, west of Morris IslandSubordinate current station6.9 mi
• Handkerchief Lighted Whistle Buoy 'H'Subordinate current station9.1 mi
• Dennis Port, 2.2 miles south ofSubordinate current station11 mi
• Monomoy Point, 6 miles west ofSubordinate current station12 mi
• Halfmoon Shoal, 3.5 miles east ofSubordinate current station14 mi
• Great Point, 0.5 mile west ofSubordinate current station14 mi

• Tide times at Chatham, Stage Harbor 7.4 mi
• Tide times at Chatham 8.7 mi
• Tide times at Saquatucket Harbor 9.9 mi
• Forecast for Chatham, 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 ACT1611, bin 1: original at NOAA. Marine alerts from the National Weather Service.