Cape Current Narrows, Shuyak Strait tidal current predictions

Now

Flood 0.1 ktToward WNW (293°)

Next slack

12:50 AMAKDT

Next max flood

5.6 kt9:41 AM

Next max ebb

5.6 kt3:31 AM

Knots along the channel: above the line the flood, running in toward WNW (293°); below it the ebb, running out toward E (93°). Times are Alaska Daylight Time. Today: slack 12:50 AM, ebb 5.6 kt 3:31 AM, slack 7:02 AM, flood 5.6 kt 9:41 AM, slack 1:04 PM, ebb 5.8 kt 3:50 PM, slack 7:29 PM, flood 5.8 kt 10:09 PM.

• Small Craft Advisory Small Craft Advisory issued September 25 at 2:47PM AKDT until September 26 at 5:00PM AKDT by NWS Anchorage AKUntil 5:00 PM
  Full text

  Coastal Waters Forecast for the Northern Gulf of Alaska Coast up to 100 nm out including Kodiak Island and Cook Inlet. Wind forecasts reflect the predominant speed and direction expected. Sea forecasts represent an average of the highest one-third of the combined wind wave and swell height. .TONIGHT...SE wind 25 kt. Seas 11 ft. .SAT...S wind 20 kt. Seas 8 ft. Widespread rain showers. .SAT NIGHT...S wind 20 kt. Seas 7 ft. .SUN...S wind 15 kt. Seas 6 ft. .SUN NIGHT...Variable wind 10 kt. Seas 4 ft. .MON THROUGH TUE...W wind 25 kt. Seas 6 ft. .WED...NW wind 15 kt. Seas 6 ft.

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.

• East Shuyak Strait EntranceHarmonic current station2.5 mi
• Lighthouse Point, Shuyak IslandHarmonic current station6.5 mi
• Alligator Island, Shelikof StraitHarmonic current station12 mi
• North of Perevalnie Island, Shuyak IslandHarmonic current station13 mi
• Black Cape, Shelikof StraitHarmonic current station15 mi
• Tonki Cape, east ofHarmonic current station23 mi
• Stevenson PassageHarmonic current station24 mi

• Tide times at Port William, Shuyak Island 3.6 mi
• Tide times at Redfox Bay, Shuyak Strait 3.7 mi
• Tide times at Andreon Bay, Shuyak Island 4.6 mi
• 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 KOD0939, bin 27: original at NOAA. Marine alerts from the National Weather Service.