Port Isabel, Pontoon Swing Bridge tidal current predictions

Now

Flood 0.7 ktToward NE (41°)

Next slack

9:11 PMCDT

Next max flood

0.7 kt4:47 PM

Next max ebb

0.3 ktMon 1:02 AM

Knots along the channel: above the line the flood, running in toward NE (41°); below it the ebb, running out toward SW (219°). Times are Central Daylight Time. Today: slack 1:54 AM, flood 0.2 kt 3:56 AM, slack 6:07 AM, ebb 0.6 kt 10:28 AM, slack 1:47 PM, flood 0.7 kt 4:47 PM, slack 9:11 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.

• Queen Isabella Causeway BridgeHarmonic current station0.7 mi
• Port Isabel Channel, North EndHarmonic current station1.4 mi
• Laguna Madre Channel, SW endHarmonic current station1.7 mi
• Laguna Madre Channel, NE endHarmonic current station2.0 mi
• ICW Laguna Madre, Light 69Harmonic current station2.6 mi
• Brazos Santiago Pass (SPIP)Harmonic current station2.8 mi
• Brownsville Ship Channel, east endHarmonic current station2.8 mi
• Brazos Santiago Pass EntranceHarmonic current station3.1 mi

• Tide times at Queen Isabella Causeway (west end) 0.5 mi
• Tide times at Port Isabel 1.2 mi
• Tide times at South Bay entrance 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 STX1815, bin 4: original at NOAA. Marine alerts from the National Weather Service.