St. Johns Bluff tidal current predictions

Now

Ebb 1.1 ktToward E (82°)

Next slack

Sat 5:51 AMEDT

Next max flood

1.6 ktSat 8:28 AM

Next max ebb

1.9 ktSat 1:35 AM

Knots along the channel: above the line the flood, running in toward W (269°); below it the ebb, running out toward E (82°). Times are Eastern Daylight Time. Today: ebb 1.8 kt 12:59 AM, slack 5:12 AM, flood 1.4 kt 7:48 AM, slack 10:27 AM, ebb 1.9 kt 1:10 PM, slack 5:28 PM, flood 1.4 kt 8:04 PM, slack 10:52 PM.

• Coastal Flood Advisory Coastal Flood Advisory issued September 25 at 10:07PM EDT until September 26 at 8:00AM EDT by NWS Jacksonville FLUntil Sat 8:00 AM
  Full text

  * WHAT...For the Coastal Flood Advisory, minor coastal flooding. For the High Surf Advisory, large breaking waves of 5 to 8 feet. For the High Rip Current Risk, dangerous rip currents. * WHERE...Coastal Duval County. * WHEN...For the Coastal Flood Advisory, until 8 AM EDT Saturday. For the High Surf Advisory, until 2 AM EDT Saturday. For the High Rip Current Risk, through late Saturday night. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. Dangerous swimming and surfing conditions and localized beach erosion. Rip currents can sweep even the best swimmers away from shore into deeper water.

  If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. Inexperienced swimmers should remain out of the water due to dangerous surf conditions. Swim near a lifeguard. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help.

• Measured, along the channel
• Predicted

A NOAA PORTS current meter, bin 4. Wind, river flow and storm surge push the real current off the prediction; the meter measures the difference.

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.

• Blount Island, East ofHarmonic current station0.7 mi
• Sisters Creek entrance (bridge)Subordinate current station2.1 mi
• ICW IntersectionHarmonic current station2.5 mi
• Mile Point, LB 22Current meter (NOAA PORTS)3.3 mi
• Mile Point LB 20Harmonic current station3.3 mi
• Dames Point, 0.23 nmi ESE ofHarmonic current station3.4 mi
• Dames Point BridgeCurrent meter (NOAA PORTS)3.7 mi
• MayportSubordinate current station3.8 mi

• Tide times at Fulton 0.6 mi
• Tide times at Clapboard Creek, Pelotes Island 1.4 mi
• Tide times at Pablo Creek entrance 3.0 mi
• Forecast for Atlantic Beach, FL
• Open the live map with tidal currents
• All tidal current stations in Florida

Tidal current predictions and real-time current measurements (PORTS) from NOAA’s Center for Operational Oceanographic Products and Services (CO-OPS), station jx0401, bin 1: original at NOAA. Marine alerts from the National Weather Service.