Approach to Alitak Bay tidal current predictions

Now

Flood 0.5 ktToward ENE (69°)

Next slack

6:43 PMAKDT

Next max flood

0.5 ktWed 4:21 AM

Next max ebb

0.6 kt9:43 PM

Knots along the channel: above the line the flood, running in toward ENE (69°); below it the ebb, running out toward SSW (210°). Times are Alaska Daylight Time. Today: slack 12:24 AM, flood 0.5 kt 3:42 AM, slack 6:52 AM, ebb 0.2 kt 8:58 AM, slack 11:18 AM, flood 0.6 kt 3:37 PM, slack 6:43 PM, ebb 0.6 kt 9:43 PM.

• Small Craft Advisory Small Craft Advisory issued September 29 at 3:30AM AKDT until September 29 at 5:00PM AKDT by NWS Anchorage AKUntil 5:00 PM
  Full text

  Coastal Waters Forecast for Southwest Alaska+Bristol Bay+The Alaska Peninsula Waters and the Aleutian Islands up to 100 nm out. 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. .TODAY...NW wind 25 kt. Seas 5 ft. .TONIGHT...NW wind 20 kt. Seas 4 ft. .WED...W wind 15 kt. Seas 3 ft. .WED NIGHT...Variable wind 10 kt. Seas 3 ft. .THU...N wind 20 kt. Seas 3 ft. .FRI...NE wind 30 kt. Seas 10 ft. .SAT...NE wind 25 kt. Seas 10 ft.

• Small Craft Advisory Small Craft Advisory issued September 28 at 2:54PM AKDT until September 29 at 5:00PM AKDT by NWS Anchorage AKUntil 5:00 PM
  Full text

  Coastal Waters Forecast for Southwest Alaska+Bristol Bay+The Alaska Peninsula Waters and the Aleutian Islands up to 100 nm out. 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...NW wind 25 kt. Seas 5 ft. .TUE...NW wind 25 kt. Seas 5 ft. .TUE NIGHT...NW wind 20 kt. Seas 4 ft. .WED...W wind 15 kt. Seas 3 ft. .WED NIGHT...Variable wind 10 kt. Seas 3 ft. .THU...NE wind 25 kt. Seas 3 ft. .FRI...NE wind 30 kt. Seas 5 ft. .SAT...NW wind 20 kt. Seas 5 ft.

• Small Craft Advisory Small Craft Advisory issued September 28 at 2:40AM AKDT until September 29 at 5:00PM AKDT by NWS Anchorage AKUntil 5:00 PM
  Full text

  Coastal Waters Forecast for Southwest Alaska+Bristol Bay+The Alaska Peninsula Waters and the Aleutian Islands up to 100 nm out. 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. .TODAY...NW wind 25 kt. Seas 5 ft. .TONIGHT...NW wind 25 kt. Seas 5 ft. .TUE...NW wind 25 kt. Seas 5 ft. .TUE NIGHT...W wind 20 kt. Seas 4 ft. .WED...SW wind 15 kt. Seas 3 ft. .THU...NE wind 25 kt. Seas 3 ft. .FRI...NE wind 30 kt. Seas 5 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.

• Cape TrinityHarmonic current station17 mi
• Sitkinak Strait, southwest entranceHarmonic current station21 mi
• Russian HarborHarmonic current station23 mi

• Tide times at Alitak 17 mi
• Tide times at Moser Bay (Trap Point) 24 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 KOD0920, bin 12: original at NOAA. Marine alerts from the National Weather Service.