Alaska Issues » Sea Ice for Walrus Outlook
Sea Ice for Walrus Outlook
Overview of SIWO
The Sea Ice for Walrus Outlook (SIWO) is a resource for Alaska Native subsistence hunters, coastal communities, and others interested in sea ice and walrus. The SIWO provides weekly reports during the spring sea-ice season with information on weather and sea-ice conditions relevant to walrus in the northern Bering Sea and southern Chukchi Sea regions of Alaska.
The outlooks are produced with information on weather and sea-ice conditions provided by the National Weather Service Alaska Region and Alaska Native sea-ice experts. The SIWO is a collaborative network managed by the Arctic Research Consortium of the U.S. (ARCUS) and AOOS, in partnership with the Eskimo Walrus Commission, the National Weather Service, the University of Alaska Fairbanks, and local observers.
Background photo courtesy of Clarence Irrigoo, Jr.
Weekly Forecasts
The forecast season usually begins in March and runs through June, depending on sea ice conditions. The full Sea Ice for Walrus Outlook can be found on the ARCUS SIWO Facebook page. The weekly forecasts of surface currents and sea ice from AOOS will also be posted on this page during the current SIWO season.
SIWO Forecast – June 27, 2025
Assessment of Current Ice Conditions Relevant to Distribution and Access of Walrus
Click the name of each community below to view more frequently updated and detailed information from the National Weather Service.
Synopsis: A warmer and drier pattern starts to settle into the area as high pressure builds in. There will be a slight chance for showers Monday afternoon and into the end of next week, but any showers that take place will be light and scattered in nature. Overall, winds remain relatively light throughout the period, with the highest winds expected to take place Sunday night through Wednesday morning. Temperatures will gradually increase through the period, as a slight warming trend brings temperatures up into the low to mid 50s early next week.
Near St. Lawrence Island
This area has ended for the 2025 season.
Nome
This area has ended for the 2025 season.
Brevig Mission/Port Clarence Area
This area has ended for the 2025 season.
Wales to Shishmaref
The only remaining sea ice is close pack ice located in southern Lopp Lagoon, and also open pack ice consisting of small to big floes offshore Shishmaref (to the northwest).
Diomede
This area has ended for the 2025 season.
Forecast Discussion
Ice Forecast
The remaining sea ice from Wales to Shishmaref is expected to melt completely by next Thursday (July 3), if not sooner.
Wind Synopsis
Shishmaref area:
Winds start off the period (June 27) out of the northeast around 5 to 10 kts (6–12 mph) before decreasing and shifting towards the west around 5 kts (6 mph) Saturday morning. These west winds persist through Sunday afternoon before strengthening and shifting towards the southwest between 10 to 15 kts (12–17 mph) Sunday night. Winds become light and variable around 6 kts (7 mph) by Wednesday morning. Winds finish off the period out of the northwest around 10 kts (12 mph) through Friday (July 4).
Temperature Trend
Shishmaref area:
Daytime temperatures will start off in the upper 40s and increase towards the low to mid 50s by Monday. Nighttime temperatures will start off in the upper 30s and increase towards the low to mid 40s beginning Monday as well. Overall, daily high and low temperatures are expected to be on an upward trend starting at the beginning of next week (Monday 6/30).
Daily Weather, Wind, and Temperature Updates
The National Weather Service provides twice-daily, text only updates on the weather, wind, and temperature conditions in specific geographical zones. An interactive weather map for access to other Alaskan zones can be found here: http://weather.gov/anchorage/ice
Higher resolution satellite images and wind maps (wind updated daily) can be viewed here: http://www.weather.gov/afg/SIWO_overview
The Alaska Ocean Observing System shares a variety of weather and sea ice related resources in their Bering Sea Portal at https://bering-sea.portal.aoos.org/.
Observations & Comments
Observations of Sea Ice Development
Observations from Shishmaref
Wednesday, 25 June 2025 – Christopher Ningeulook
There’s still ice within reach for any hunters willing to endure Northwest winds until Saturday. No rain but fog in the forecast. Hunters have been successful in both walrus and bearded seals over the last few days. Although many still are in need of catching enough marine mammals to store for the winter. The last of the ice is sparatic along the coast but is mainly around cape espenburg and kotzebue sound.
*Huntable Ice for our community mainly between cape espenburg and cape kruzenstern but stretches further north
Images courtesy of Christopher Ningeulook.
Ice edge is north of light house about 55 east of Shishmaref (still well within reach). Satellite imagery courtesy of Christopher Ningeulook.
Friday, 75 June 2025 – Curtis Nayokpuk
Spring subsistence hunting wrapped up for the season. Remaining ice melting and with constant poor spring weather with wind, fog, drizzle and rain hampering hunters resulted in less than average for Bearded Seals. Combined with packed ice and limited access to hunt inside ice where sea mammals are, most drying racks (spring camps) show bare or empty.
Photos courtesy of Curtis Nayokpuk.
Observations from Diomede
Wednesday, 25 June 2025 – Odge Ahkinga
Few days ago last sea ice near Diomede east 7 miles hunting is done now waiting for murre eggs been a cold spring.
Weather and sea ice conditions in Diomede. Photo courtesy of Odge Ahkinga.
Shared by the Alaska Ocean Observing System (AOOS) for 24 June – 2 June 2025
The images below show animations of the movement of ice predicted by the HYbrid Coordinate Ocean Model (HYCOM). Snapshots from the forecast show ice coverage from 0% (black) to 100% (white) and arrows show the relative speed and direction of the ice. A light boundary is drawn at 15% predicted ice cover to highlight the ice edge, but ice may be predicted to extend beyond it. Some bays, lagoons, and areas very close to shore are not covered by the model. (Image produced by the Alaska Ocean Observing System / Axiom Data Science).
These animations show the predicted movement of ice predicted by the HYbrid Coordinate Ocean Model (HYCOM). Snapshots from the forecast show ice coverage from 0% (black) to 100% (white) and arrows show the relative speed and direction of the ice. A light boundary is drawn at 15% predicted ice cover to highlight the ice edge, but ice may be predicted to extend beyond it. Some bays, lagoons, and areas very close to shore are not covered by the model. (Image produced by the Alaska Ocean Observing System / Axiom Data Science)
SIWO Forecast Archives
SIWO Forecast – June 27, 2025
Assessment of Current Ice Conditions Relevant to Distribution and Access of Walrus Click the name of each community below to view more frequently updated and detailed information from the National Weather Service. Synopsis: A warmer and drier pattern starts to settle...
SIWO Forecast – June 20, 2025
Assessment of Current Ice Conditions Relevant to Distribution and Access of Walrus Click the name of each community below to view more frequently updated and detailed information from the National Weather Service. Synopsis: Unsettled weather will begin Friday night...
SIWO Forecast – June 13, 2025
Assessment of Current Ice Conditions Relevant to Distribution and Access of Walrus Click the name of each community below to view more frequently updated and detailed information from the National Weather Service. Synopsis: Generally wet and rainy conditions to start...
SIWO Forecast – June 6, 2025
Assessment of Current Ice Conditions Relevant to Distribution and Access of Walrus Click the name of each community below to view more frequently updated and detailed information from the National Weather Service. Synopsis: Generally dry conditions with sustained...
SIWO Forecast – May 30, 2025
Assessment of Current Ice Conditions Relevant to Distribution and Access of Walrus Click the name of each community below to view more frequently updated and detailed information from the National Weather Service. Synopsis: There will be a few waves of low pressure...
SIWO Forecast – May 23, 2025
Assessment of Current Ice Conditions Relevant to Distribution and Access of Walrus Click the name of each community below to view more frequently updated and detailed information from the National Weather Service. Synopsis: Generally northerly winds with cloudy...
SIWO Forecast – May 16, 2025
Assessment of Current Ice Conditions Relevant to Distribution and Access of Walrus Click the name of each community below to view more frequently updated and detailed information from the National Weather Service. Synopsis: Mostly dry conditions with northerly flow...
SIWO Forecast – May 9, 2025
Assessment of Current Ice Conditions Relevant to Distribution and Access of Walrus Click the name of each community below to view more frequently updated and detailed information from the National Weather Service. Synopsis:A large low-pressure system spins over the...
SIWO Forecast – May 2, 2025
Assessment of Current Ice Conditions Relevant to Distribution and Access of Walrus Click the name of each community below to view more frequently updated and detailed information from the National Weather Service. Synopsis: Weak northerly flow persists over the region...
SIWO Forecast – April 25, 2025
Assessment of Current Ice Conditions Relevant to Distribution and Access of Walrus Click the name of each community below to view more frequently updated and detailed information from the National Weather Service. Synopsis: A low-pressure system will make its way up...
SIWO Forecast – April 18, 2025
Assessment of Current Ice Conditions Relevant to Distribution and Access of Walrus Click the name of each community below to view more frequently updated and detailed information from the National Weather Service. Synopsis: A low-pressure system over western Alaska...
SIWO Forecast – April 11, 2025
Assessment of Current Ice Conditions Relevant to Distribution and Access of Walrus Click the name of each community below to view more frequently updated and detailed information from the National Weather Service. Synopsis: A cold low-pressure system over western...
SIWO Forecast – April 4, 2025
Assessment of Current Ice Conditions Relevant to Distribution and Access of Walrus Click the name of each community below to view more frequently updated and detailed information from the National Weather Service. Synopsis: Broad high pressure continues over St....
SIWO Forecast – March 28, 2025
Assessment of Current Ice Conditions Relevant to Distribution and Access of Walrus Click the name of each community below to view more frequently updated and detailed information from the National Weather Service. Synopsis: A ridge of high pressure that is currently...
SIWO Forecast – March 21, 2025
Assessment of Current Ice Conditions Relevant to Distribution and Access of Walrus Click the name of each community below to view more frequently updated and detailed information from the National Weather Service. Synopsis: Generally quiet weather is expected for St....
SIWO Forecast – June 28, 2024
Assessment of Current Ice Conditions Relevant to Distribution and Access of Walrus Click the name of each community below to view more frequently updated and detailed information from the National Weather Service. Synopsis: Low pressure lingers over the Bering Sea...
Sea Ice for Walrus Outlook releases short film
The Sea Ice for Walrus Outlook (SIWO) announced the release of a new short film highlighting the collaboration and dedication of the many contributors who have shaped the program’s success as it approaches its 15th season. SIWO provides weekly updates during the...



