The Eye Opener tidal current predictions

Now

Ebb 1.8 ktToward W (272°)

Next slack

7:24 AMAKDT

Next max flood

1.1 kt10:25 AM

Next max ebb

2.6 kt4:07 PM

Knots along the channel: above the line the flood, running in toward ESE (103°); below it the ebb, running out toward W (272°). Times are Alaska Daylight Time. Today: ebb 2.6 kt 3:30 AM, slack 7:24 AM, flood 1.1 kt 10:25 AM, slack 12:33 PM, ebb 2.6 kt 4:07 PM, slack 7:58 PM, flood 1.1 kt 10:41 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.

• Red Bay EntranceHarmonic current station3.9 mi
• Round Island LightHarmonic current station7.2 mi
• Snow Passage, north entranceSubordinate current station9.7 mi
• Vichnefski Rock LightHarmonic current station9.9 mi
• Kashevarof Passage, north entranceSubordinate current station12 mi
• Snow Passage NarrowsHarmonic current station13 mi
• Snow Passage, southern approachHarmonic current station14 mi
• Point AlexanderSubordinate current station14 mi

• Tide times at Bushy Island, Snow Passage 12 mi
• Tide times at Port Protection, Prince of Wales Island 14 mi
• Tide times at El Capitan Passage, W. of Aneskett Pt 15 mi
• Forecast for Petersburg, AK
• Open the live map with tidal currents
• All tidal current stations in Alaska

Tidal current predictions from NOAA’s Center for Operational Oceanographic Products and Services (CO-OPS), station SEA0601, bin 15: original at NOAA. Marine alerts from the National Weather Service.