Portillo Channel tidal current predictions

Now

Ebb 0.3 ktToward S (170°)

Next slack

3:23 AMAKDT

Next max flood

0.4 kt6:58 AM

Next max ebb

0.3 kt12:41 AM

Knots along the channel: above the line the flood, running in toward NNW (345°); below it the ebb, running out toward S (170°). Times are Alaska Daylight Time. Today: ebb 0.3 kt 12:41 AM, slack 3:23 AM, flood 0.4 kt 6:58 AM, slack 10:06 AM, ebb 0.3 kt 12:53 PM, slack 3:35 PM, flood 0.4 kt 7:21 PM, slack 10:32 PM.

• Small Craft Advisory Small Craft Advisory issued September 25 at 11:27PM AKDT until September 26 at 6:00PM AKDT by NWS Juneau AKUntil 6:00 PM
  Full text

  * WHAT...Southeast winds 20 to 30 kt and seas 7 to 10 ft expected. * WHERE...Yakutat Bay, Dixon Entrance to Cape Decision out to 15 NM, Cape Decision to Cape Edgecumbe out to 15 NM and Cape Edgecumbe to Cape Spencer out to 15 NM. * WHEN...From 7 AM to 6 PM AKDT Saturday. * 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 25 at 3:33PM AKDT until September 26 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...W wind 10 kt becoming S 20 kt late. Seas 5 ft. .SAT...S wind 25 kt. Seas 9 ft. Rain in the morning. .SAT NIGHT...S wind 20 kt. Seas 8 ft. Rain late. .SUN...S wind 25 kt. Seas 10 ft. Rain. .SUN NIGHT...S wind 30 kt. Seas 11 ft. Showers. .MON...S wind 15 kt. Seas 10 ft. .TUE...SW wind 15 kt. Seas 9 ft. .WED...S wind 15 kt. Seas 9 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, northHarmonic current station5.9 mi
• San Christoval RockHarmonic current station6.9 mi
• San Christoval Chanel, Larz Lt., 0.25nm N ofHarmonic current station7.6 mi
• Saint Nicholas Channel, south endHarmonic current station8.4 mi
• Klawock Narrows, north of Fish Egg IslandHarmonic current station9.7 mi
• Cabras Islands, 1 mile west ofSubordinate current station9.9 mi
• Cape Flores, 1 mile north ofSubordinate current station10.0 mi
• Cape FloresSubordinate current station11 mi

• Tide times at Cruz Pass, San Fernando Island 5.5 mi
• Tide times at Steamboat Bay, Noyes Island 8.7 mi
• Tide times at Craig, Klawock Inlet 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 SEA0637, bin 10: original at NOAA. Marine alerts from the National Weather Service.