Captains Bay tidal current predictions

Now

SlackTurning

Next slack

9:44 PMAKDT

Next max flood

0.3 ktSat 3:29 PM

Next max ebb

0.1 ktWed 12:26 AM

Knots along the channel: above the line the flood, running in toward SSW (200°); below it the ebb, running out. Times are Alaska Daylight Time. Today: slack 7:54 AM, flood 0.4 kt 3:01 PM, slack 9:44 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 30 kt increasing to 40 kt after midnight. Seas 6 ft. Rain showers. .SAT...SW wind 35 kt. Seas 5 ft. Rain showers. .SAT NIGHT...W wind 30 kt. Seas 5 ft. Rain showers. .SUN...W wind 25 kt. Seas 4 ft. .SUN NIGHT...NW wind 25 kt. Seas 9 ft. .MON...W wind 25 kt. Seas 5 ft. .TUE...W wind 20 kt. Seas 3 ft. .WED...E wind 20 kt. Seas 2 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...W wind 35 kt. Seas 5 ft. Rain showers. .TONIGHT...SW wind 30 kt increasing to 40 kt after midnight. Seas 6 ft. Rain showers. .SAT...W wind 40 kt. Seas 6 ft. Rain showers. .SAT NIGHT...W wind 30 kt. Seas 5 ft. .SUN THROUGH MON...W wind 25 kt. Seas 9 ft. .TUE...W wind 20 kt. Seas 3 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 25 kt increasing to 40 kt after midnight. Seas 6 ft. Rain showers. .FRI...W wind 35 kt. Seas 5 ft. Rain showers. .FRI NIGHT...SW wind 30 kt increasing to 40 kt after midnight. Seas 6 ft. Rain showers. .SAT...W wind 40 kt. Seas 6 ft. .SAT NIGHT...W wind 30 kt. Seas 5 ft. .SUN THROUGH MON...W wind 25 kt. Seas 5 ft. .TUE...W wind 20 kt. Seas 2 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 Cheerful, Unalaska IslandHarmonic current station11 mi
• Priest RockHarmonic current station13 mi
• Udagak Strait (narrows)Harmonic current station15 mi
• Unalga PassHarmonic current station15 mi
• Bishop Point, Unalaska IslandHarmonic current station17 mi
• Sedanka PassHarmonic current station20 mi
• Baby PassHarmonic current station21 mi
• Akutan PassHarmonic current station22 mi

• Tide times at Unalaska 1.1 mi
• Tide times at Dutch Harbor, Amaknak Island 1.6 mi
• Tide times at Kisselen Bay, Beaver Inlet 11 mi
• Forecast for Dutch Harbor, 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 UNI1016, bin 4: original at NOAA. Marine alerts from the National Weather Service.