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FZAK80 PAFC 032234

ICEAFC



Sea Ice Forecast for Western and Arctic Alaskan Coastal Waters 

National Weather Service - Alaska Sea Ice Program 

234 PM AKDT Friday 3 October 2025



FORECAST VALID...Wednesday 8 October 2025



ANALYSIS CONFIDENCE...Moderate.



SYNOPSIS...High pressure over the Chukchi Sea spreads eastward 

across the Beaufort Sea on Saturday. A low pressure system sets up 

over the western Bering Sea into the Chukchi Sea which will swing 

fronts over the southern Beaufort Sea through the weekend. Another 

low develops over the Bering Sea on Monday and strengthens as it 

moves north to the Chukchi Sea and western Beaufort Sea by Wednesday.



-BEAUFORT SEA-



PKZ505-Central US Arctic Offshore-

PKZ510-Eastern US Arctic Offshore-

PKZ813-Point Franklin to Cape Halkett out to 15 nm-

PKZ814-Cape Halkett to Flaxman Island out to 15 nm-

PKZ859-Point Franklin to Cape Halkett from 45 to 140 nm-

PKZ860-Cape Halkett to Flaxman Island from 45 to 60 nm-

PKZ861-Flaxman Island to Demarcation Point from 20 to 45 nm-



The main ice edge in the Chukchi Sea extends from 71 47’N 154 54’W 

to 71 10’N 152 11’W to 71 17’N 147 36’W to 70 39’N 147 5’W to 70 

18’N 140 57’W and continues east into Canadian waters. The ice edge 

is open water. 



From land-based points in Alaska, the main ice edge in the Chukchi 

Sea extends from 40 nm north of Ikiak to 20 nm north of Cape Halkett 

to 90 nm northeast of Cape Halkett to 25 nm north of Flaxman Island 

to 35 nm north of Demarcation Point and continues east into Canadian 

waters. The ice edge is open water. 



FORECAST FOR THE BEAUFORT SEA (DAYS 1 through 5)...Forecast 

confidence is high. New ice has developed along protected areas of 

the coast. Growth will continue through Saturday then a front and 

stronger easterly/northeasterly winds will likely melt everything 

that has developed along the coast. Southerly winds develop on 

Tuesday and Wednesday which will continue to inhibit new ice growth 

along the coast. Otherwise ice will continue to move west/southwest 

5-10 nm a day through Monday while continuing to grow closer to the 

pack. Ice will move north on Tuesday and Wednesday. 



-CHUKCHI SEA-



PKZ500-Western US Arctic Offshore-

PKZ505-Central US Arctic Offshore-

PKZ813-Point Franklin to Cape Halkett out to 15 nm-

PKZ859-Point Franklin to Cape Halkett from 15 to 75 nm-



The main ice edge in the Chukchi Sea extends from 71 47’N 154 54’W 

to 72 47’N 163 13’W to 73 16’N 170 28’W and continues southwest into 

Russian waters. The ice edge is open water. 



From land-based points in Alaska, the main ice edge in the Chukchi 

Sea extends from 40 nm north of Ikiak to 145 nm northwest of 

Utqiagvik to 240 nm northwest of Wainwright and continues southwest 

into Russian waters. The ice edge is open water. 



FORECAST FOR THE CHUKCHI SEA (DAYS 1 through 5)...Forecast 

confidence is high. Light northerly winds continue through Saturday 

before turning moderate easterly on Sunday and then again on 

Tuesday. By Wednesday,  a low centered over the Chukchi Sea will 

bring strong southwesterly winds along the NW AK coast and 

northeasterly winds over the northern Chukchi. Expect new ice to 

continue to grow out from the ice edge through Saturday, then melt 

during the periods of easterly winds.



&& 

Fenrich