Udagak Strait (narrows) tidal current predictions

Now

Ebb 0.1 ktToward E (94°)

Next slack

11:11 PMAKDT

Next max flood

3.4 ktSat 1:57 AM

Next max ebb

1.8 kt8:27 PM

Knots along the channel: above the line the flood, running in toward W (273°); below it the ebb, running out toward E (94°). Times are Alaska Daylight Time. Today: flood 3.0 kt 1:11 AM, slack 4:27 AM, ebb 3.1 kt 7:22 AM, slack 10:51 AM, flood 3.1 kt 1:31 PM, slack 5:51 PM, ebb 1.8 kt 8:27 PM, slack 11:11 PM.

• Gale Warning Gale Warning issued September 25 at 3:30PM AKDT until September 26 at 5:00PM AKDT by NWS Anchorage AKUntil Sat 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...SW wind 45 kt. Seas 19 ft. .SAT...SW wind 40 kt. Seas 18 ft. .SAT NIGHT...W wind 30 kt. Seas 11 ft. .SUN AND SUN NIGHT...NW wind 25 kt. Seas 7 ft. .MON THROUGH TUE...W wind 20 kt. Seas 4 ft. .WED...SE wind 25 kt. Seas 6 ft.

• Gale Warning Gale Warning issued September 25 at 5:09AM AKDT until September 26 at 5:00PM AKDT by NWS Anchorage AKUntil Sat 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...SW wind 45 kt. Seas 21 ft. Rain showers. .TONIGHT...SW wind 45 kt. Seas 21 ft. Rain showers. .SAT...W wind 40 kt. Seas 19 ft. .SAT NIGHT...W wind 30 kt. Seas 12 ft. .SUN...NW wind 25 kt. Seas 8 ft. .MON THROUGH TUE...W wind 20 kt. Seas 5 ft.

• Gale Warning Gale Warning issued September 24 at 3:09PM AKDT until September 26 at 5:00AM AKDT by NWS Anchorage AKUntil Sat 5:00 AM
  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...SW wind 45 kt. Seas 22 ft. Rain showers. .FRI...SW wind 45 kt. Seas 21 ft. Rain showers. .FRI NIGHT...SW wind 45 kt. Seas 21 ft. Rain showers. .SAT...W wind 40 kt. Seas 19 ft. .SAT NIGHT...W wind 30 kt. Seas 12 ft. .SUN...W wind 20 kt. Seas 7 ft. .MON THROUGH TUE...W wind 15 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.

• Sedanka PassHarmonic current station12 mi
• Captains BayHarmonic current station15 mi
• Unalga PassHarmonic current station15 mi
• Baby PassHarmonic current station19 mi
• Priest RockHarmonic current station20 mi
• Akutan PassHarmonic current station22 mi

• Tide times at Udagak Strait 0.3 mi
• Tide times at Udamat Bay, Sedanka Island 7.2 mi
• Tide times at Kisselen Bay, Beaver Inlet 12 mi
• Forecast for Unalaska, 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 UNI1012, bin 29: original at NOAA. Marine alerts from the National Weather Service.