Alaska

Alaska, United States © pexels.com

Alaska Sea and Water Temperature

This page provides detailed information about the water temperature in Alaska, United States. All cities and resorts on the coast, also in lakes and along the rivers. The range of sea temperatures for today. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.

Water Temperature in Alaska: General Trends and Swimming Opportunities

Alaska, with its vast coastline along the Pacific Ocean and numerous rivers and lakes, experiences some of the coldest water temperatures in the United States. The water along Alaska's coastline, especially in areas like the Gulf of Alaska and the Bering Sea, remains very cold year-round. In the summer months, the water temperature in the coastal regions can range from 40°F to 55°F (4°C to 13°C), making swimming or prolonged water exposure challenging for most people. Even in the warmer summer months, the temperature rarely exceeds 60°F (16°C), with some regions staying much colder. The winter months can see coastal waters dipping down to around 30°F to 35°F (-1°C to 2°C), with ice coverage forming in more northern areas.

Inland, Alaska's rivers and lakes also experience extreme temperature variations. The rivers, particularly in the interior of the state, tend to be cold throughout the year. During the summer months, river temperatures in areas like the Yukon or Kenai rivers might reach around 50°F to 60°F (10°C to 16°C), though they are often colder due to the glacial meltwater that feeds these rivers. The spring and early summer are when these rivers are most swimmable, though they remain chilly, even in peak summer. In the colder months, river water temperatures can drop significantly, sometimes reaching below freezing in certain areas where ice is prevalent.

Alaska’s many lakes also experience similar cold temperatures. The larger lakes, such as Lake Iliamna and Lake Clark, have waters that can range from 40°F to 55°F (4°C to 13°C) during summer, making them suitable for boating and fishing but not comfortable for swimming. As with rivers, lake temperatures drop considerably in the fall and winter, often falling to below 40°F (4°C). In winter, many of these lakes freeze over, and activities like ice fishing and snowmobiling become more popular than water-based recreation. Despite the chilly waters, Alaska’s natural beauty draws visitors for fishing, kayaking, and exploring, but preparation for cold temperatures is essential for any water-related activities.

Geographical Location of Alaska

Frequently Asked Questions About Alaska and its Water Temperatures