How Cold Are Alaskan Waters? Seasonal Temperatures in the Gulf of Alaska and Bering Sea

Winter (December–February)

Gulf of Alaska: 32–39°F (0–4°C). Bering Sea: 28–32°F (-2–0°C). Sea ice forms extensively.

Summer (June–August)

Gulf of Alaska: 46–54°F (8–12°C). Bering Sea: 39–46°F (4–8°C). Still cold compared to lower latitudes.

Local Variations

Near glaciers, temperatures are lower; warmer currents can raise them slightly. Shallow coastal areas fluctuate with air temperature. These frigid waters support unique cold-adapted ecosystems, including rich fisheries and marine mammals.