Queen Isabella Causeway Bridge tidal current predictions

Now

Flood 0.6 ktToward NW (312°)

Next slack

11:57 PMCDT

Next max flood

1.2 ktTue 6:16 PM

Next max ebb

0.1 ktTue 2:19 AM

Knots along the channel: above the line the flood, running in toward NW (312°); below it the ebb, running out toward SE (136°). Times are Central Daylight Time. Today: ebb 0.2 kt 12:16 AM, slack 3:15 AM, slack 4:35 AM, ebb 0.9 kt 9:18 AM, slack 1:44 PM, flood 1.1 kt 5:25 PM, slack 11:57 PM.

None right now. The National Weather Service issues small craft advisories, gale and storm warnings, special marine warnings, dense fog advisories and coastal flood products for water like this.

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.

• Port Isabel, Pontoon Swing BridgeHarmonic current station0.7 mi
• ICW Laguna Madre, Light 69Harmonic current station1.9 mi
• Port Isabel Channel, North EndHarmonic current station2.1 mi
• Laguna Madre Channel, NE endHarmonic current station2.2 mi
• Laguna Madre Channel, SW endHarmonic current station2.5 mi
• Brazos Santiago Pass (SPIP)Harmonic current station2.9 mi
• Brazos Santiago Pass EntranceHarmonic current station3.2 mi
• Brownsville Ship Channel, east endHarmonic current station3.5 mi

• Tide times at Queen Isabella Causeway (west end) 0.8 mi
• Tide times at Queen Isabella Causeway (east end) 1.7 mi
• Tide times at Port Isabel 1.8 mi
• Forecast for Port Isabel, TX
• Open the live map with tidal currents
• All tidal current stations in Texas

Tidal current predictions from NOAA’s Center for Operational Oceanographic Products and Services (CO-OPS), station STX1814, bin 14: original at NOAA. Marine alerts from the National Weather Service.