Johns Pass Bridge, north span tidal current predictions

Now

Flood 0.9 ktToward NE (34°)

Next slack

Sat 12:06 AMEDT

Next max flood

1.0 ktSat 9:43 AM

Next max ebb

1.7 ktSat 3:41 AM

Knots along the channel: above the line the flood, running in toward NE (34°); below it the ebb, running out toward SSW (209°). Times are Eastern Daylight Time. Today: ebb 1.3 kt 3:02 AM, slack 6:30 AM, flood 0.8 kt 8:47 AM, slack 11:41 AM, ebb 1.4 kt 2:53 PM, slack 6:09 PM, flood 1.1 kt 8:35 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.

• Johns Pass Bridge, 0.3nm north ofHarmonic current station0.2 mi
• Johns Pass EntranceHarmonic current station0.5 mi
• Blind Pass (north end)Subordinate current station2.2 mi
• Cats Point (bridge west of)Subordinate current station6.3 mi
• Pass-a-Grille ChannelSubordinate current station7.4 mi
• Pine Key (Pinellas Bayway bridge)Subordinate current station7.4 mi
• The Narrows (Indian Rocks Beach Bridge)Subordinate current station7.7 mi
• Bridge, 0.8 mi. south of Maximo PtSubordinate current station8.8 mi

• Tide times at Johns Pass 0.1 mi
• Tide times at Madeira Beach Causeway 1.9 mi
• Tide times at Long Key, 0.5mi N. of Corey Causeway 2.8 mi
• Forecast for Treasure Island, FL
• Open the live map with tidal currents
• All tidal current stations in Florida

Tidal current predictions from NOAA’s Center for Operational Oceanographic Products and Services (CO-OPS), station JOP1103, bin 9: original at NOAA. Marine alerts from the National Weather Service.