Saint Nicholas Channel, north tidal current predictions

Now

SlackTurning

Next slack

6:54 PMAKDT

Next max flood

0.8 kt10:42 PM

Next max ebb

0.6 ktTue 4:27 AM

Knots along the channel: above the line the flood, running in toward NNE (16°); below it the ebb, running out toward S (184°). Times are Alaska Daylight Time. Today: slack 1:25 AM, ebb 0.6 kt 3:55 AM, slack 6:47 AM, flood 0.6 kt 10:15 AM, slack 1:10 PM, ebb 0.8 kt 3:58 PM, slack 6:54 PM, flood 0.8 kt 10:42 PM.

• Small Craft Advisory Small Craft Advisory issued September 28 at 2:48PM AKDT until September 29 at 10:00PM AKDT by NWS Juneau AKUntil Tue 10:00 PM
  Full text

  * WHAT...Seas 6 to 9 ft. * WHERE...Dixon Entrance to Cape Decision out to 15 NM. * WHEN...Until 10 PM 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 2:47PM AKDT until September 29 at 5:00PM AKDT by NWS Juneau AKUntil Tue 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...SW wind 15 kt. Seas 9 ft. Showers. .TUE...S wind 15 kt. Seas 8 ft. Showers. Slight chance of thunderstorms in the afternoon. .TUE NIGHT...SW wind 15 kt. Seas 8 ft. Slight chance of thunderstorms in the evening. .WED...S wind 10 kt. Seas 7 ft. .WED NIGHT...S wind 15 kt. Seas 6 ft. .THU...SE wind 10 kt. Seas 5 ft. .FRI...S wind 15 kt. Seas 7 ft. .SAT...S wind 25 kt. Seas 10 ft.

• 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.

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.

• Saint Nicholas Channel, south endHarmonic current station5.8 mi
• Portillo ChannelHarmonic current station5.9 mi
• Arriaga Passage, west endHarmonic current station7.3 mi
• San Christoval Chanel, Larz Lt., 0.25nm N ofHarmonic current station9.9 mi
• San Christoval RockHarmonic current station11 mi
• Boca de FinasHarmonic current station12 mi
• Cabras Islands, 1 mile west ofSubordinate current station14 mi
• Timbered IslandHarmonic current station14 mi

• Tide times at Steamboat Bay, Noyes Island 2.9 mi
• Tide times at Cruz Pass, San Fernando Island 9.7 mi
• Tide times at Anguilla Island 11 mi
• Forecast for Craig, 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 SEA0635, bin 12: original at NOAA. Marine alerts from the National Weather Service.