Lower Hell Gate, Knubble Bay tidal current predictions

Now

Ebb 2.1 ktToward SSE (155°)

Next slack

6:44 AMEDT

Next max flood

3.4 kt9:52 AM

Next max ebb

3.8 kt3:27 AM

Knots along the channel: above the line the flood, running in toward WNW (290°); below it the ebb, running out toward SSE (155°). Times are Eastern Daylight Time. Today: ebb 3.8 kt 3:27 AM, slack 6:44 AM, flood 3.4 kt 9:52 AM, slack 12:10 PM, ebb 4.1 kt 3:49 PM, slack 7:06 PM, flood 3.4 kt 10:13 PM.

• Gale Warning Gale Warning issued September 25 at 2:26PM EDT until September 27 at 8:00PM EDT by NWS Gray MEUntil Sun 8:00 PM
  Full text

  * WHAT...Northeast winds 20 to 30 kt with gusts up to 40 kt and seas 7 to 12 ft expected. * WHERE...Coastal Waters from Stonington, ME to Port Clyde, ME out 25 NM and Coastal Waters from Port Clyde, ME to Cape Elizabeth, ME out 25 NM. * WHEN...From 11 AM Saturday to 8 PM EDT Sunday. * 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 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.

• Lowe Point, NE of, Sasanoa RiverSubordinate current station1.8 mi
• Upper Hell Gate, Sasanoa RiverSubordinate current station2.4 mi
• Sheepscot River, off Barter IslandSubordinate current station2.5 mi
• Fiddler Ledge, north ofSubordinate current station3.3 mi
• Bluff Head, west ofSubordinate current station3.6 mi
• Doubling Point, south ofSubordinate current station3.8 mi
• Lincoln Ledge, east ofSubordinate current station4.2 mi
• Bath Iron Works, Kennebec RiverHarmonic current station4.4 mi

• Tide times at Robinhood, Sasanoa River 1.6 mi
• Tide times at Mill Point, Sasanoa River 1.8 mi
• Tide times at Isle of Springs 2.4 mi
• Forecast for Woolwich, ME
• Open the live map with tidal currents
• All tidal current stations in Maine

Tidal current predictions from NOAA’s Center for Operational Oceanographic Products and Services (CO-OPS), station ACT0591, bin 1: original at NOAA. Marine alerts from the National Weather Service.