Coronation Island - Spanish Island, between tidal current predictions

Now

Ebb 0.8 ktToward E (99°)

Next slack

7:02 AMAKDT

Next max flood

1.4 kt10:08 AM

Next max ebb

1.8 kt2:50 PM

Knots along the channel: above the line the flood, running in toward W (275°); below it the ebb, running out toward E (99°). Times are Alaska Daylight Time. Today: slack 12:43 AM, ebb 1.8 kt 3:02 AM, slack 7:02 AM, flood 1.4 kt 10:08 AM, slack 12:26 PM, ebb 1.8 kt 2:50 PM, slack 6:27 PM, flood 1.9 kt 10:39 PM.

• Small Craft Advisory Small Craft Advisory issued September 28 at 3:33AM AKDT until September 29 at 6:00AM AKDT by NWS Juneau AKUntil Tue 6:00 AM
  Full text

  * WHAT...Seas 7 to 10 ft expected. * WHERE...Dixon Entrance to Cape Decision out to 15 NM and Cape Decision to Cape Edgecumbe out to 15 NM. * WHEN...Until 6 AM AKDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft.

  Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.

• Small Craft Advisory Small Craft Advisory issued September 28 at 3:28AM AKDT until September 29 at 5:00AM AKDT by NWS Juneau AKUntil Tue 5:00 AM
  Full text

  Southeast Alaska Coastal Waters from Dixon Entrance to Cape Suckling out 100 NM Wind forecasts reflect the predominant speed and direction expected. Seas forecasts represent the average of the highest one-third of the combined windwave and swell height. .TODAY...SW wind 15 kt. Seas 9 ft. Showers early in the morning. .TONIGHT...S wind 15 kt. Seas 9 ft. Showers. .TUE...S wind 15 kt. Seas 8 ft. Showers. .TUE NIGHT...SW wind 15 kt. Seas 8 ft. Showers. .WED...S wind 10 kt. Seas 7 ft. .THU...SE wind 10 kt. Seas 5 ft. .FRI...S wind 15 kt. Seas 7 ft.

• Small Craft Advisory Small Craft Advisory issued September 27 at 3:48PM AKDT until September 28 at 5:00PM AKDT by NWS Juneau AKUntil 5:00 PM
  Full text

  Southeast Alaska Coastal Waters from Dixon Entrance to Cape Suckling out 100 NM Wind forecasts reflect the predominant speed and direction expected. Seas forecasts represent the average of the highest one-third of the combined windwave and swell height. .TONIGHT...S wind 30 kt becoming W 15 kt late. Seas 12 ft. Showers in the evening. Slight chance of thunderstorms. .MON...SW wind 15 kt. Seas 9 ft. .MON NIGHT...S wind 15 kt. Seas 8 ft. Showers. .TUE...S wind 15 kt. Seas 8 ft. Showers. .TUE NIGHT...SW wind 10 kt. Seas 8 ft. Showers. .WED...S wind 10 kt. Seas 7 ft. .THU...S wind 10 kt. Seas 5 ft. .FRI...SE wind 25 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.

• Cora Point, 2 miles east ofSubordinate current station3.1 mi
• Fairway Island, SW ofHarmonic current station8.0 mi
• Fairway Island, 2nm east ofHarmonic current station10 mi
• Point St. Albans, 3 miles SSE ofSubordinate current station10 mi
• Warren ChannelHarmonic current station11 mi
• Affleck CanalHarmonic current station13 mi
• Point St. Albans, 4 miles east ofSubordinate current station15 mi
• Ruins Point, 2 miles west ofSubordinate current station18 mi

• Tide times at Coronation Island 1.6 mi
• Tide times at Affleck Canal entrance, Kuiu Island 7.7 mi
• Tide times at Port McArthur, Kuiu Island 9.8 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 SEA0621, bin 15: original at NOAA. Marine alerts from the National Weather Service.