Things to Do in Juneau in May
May weather, activities, events & insider tips
May Weather in Juneau
Is May Right for You?
Advantages
- Extended daylight hours with nearly 18 hours of usable light daily - sunset doesn't happen until after 9:30pm, giving you enormous flexibility for wildlife viewing, glacier tours, and outdoor activities without feeling rushed
- Peak whale watching season as humpbacks arrive in massive numbers to feed - May typically sees the highest concentration of whales in Auk Bay and Stephens Passage, with success rates above 95% on most tours
- Wildflower bloom across alpine meadows and coastal trails - the combination of snowmelt and warming temperatures creates spectacular displays on trails like Perseverance and Mount Roberts, with lupine and chocolate lilies particularly abundant
- Shoulder season pricing before cruise ship peak - accommodations typically run 20-30% cheaper than June-August rates, and you can still book popular tours with just 3-5 days notice rather than the weeks required in high summer
Considerations
- Unpredictable weather transitions between late spring and early summer - you might experience everything from 7°C (45°F) rain to 18°C (65°F) sunshine in a single day, making packing and planning more complex than stable summer months
- Some higher elevation trails remain snowbound or muddy - anything above 600 m (2,000 ft) can still have significant snow patches through mid-May, limiting access to alpine routes without proper gear
- Cruise ship crowds begin ramping up in late May - while early May is quiet, the last week sees ship arrivals increase substantially, affecting downtown congestion and tour availability
Best Activities in May
Mendenhall Glacier kayaking and hiking tours
May offers the sweet spot for glacier access - ice caves are still partially accessible in early May before seasonal melt closes them, while Mendenhall Lake has minimal boat traffic compared to summer chaos. The combination of snowmelt waterfalls and calving ice creates dramatic scenery. Water temperatures are cold at 4-6°C (39-43°F) but tour operators provide proper gear. The glacier face is particularly active with calving events as temperatures warm, though this also means maintaining safe distances of at least 90 m (300 ft).
Whale watching expeditions in Auk Bay
May is arguably THE month for humpback whale encounters in Juneau waters. The herring and krill populations draw whales in concentrations you won't see other times of year. Bubble net feeding behavior peaks in May and early June, offering the most spectacular whale activity. Tours run 3.5-5 hours and success rates for sightings exceed 95% - most trips see 5-15 individual whales. The trade-off is choppier water conditions than summer, so take seasickness precautions if you're prone. Orcas also pass through occasionally in May during their spring migration.
Rainforest hiking on coastal and valley trails
The Tongass National Forest surrounding Juneau explodes with new growth in May. Trails like Perseverance, Point Bishop, and the East Glacier Loop offer accessible hiking through old growth hemlock and spruce with minimal snow at lower elevations below 300 m (1,000 ft). Devil's club leaves are just unfurling, skunk cabbage blooms in wet areas, and you'll avoid the dense mosquito swarms that arrive in June. Wildlife activity is high as bears emerge and birds migrate through. That said, trails can be muddy and slippery - waterproof boots with good tread are essential, not optional.
Salmon bake experiences and seafood tours
While salmon fishing season doesn't open until later, May is excellent for sampling Juneau's seafood culture. The Gold Creek Salmon Bake and similar operations open for the season in mid-May, offering all-you-can-eat grilled salmon, halibut, and crab in outdoor settings. King crab season runs through May, so you'll find the freshest Dungeness and king crab at markets and restaurants. Food tours through downtown cover the fishing industry history, local breweries, and smoked fish shops. The weather in May means these outdoor dining experiences are comfortable with layers rather than the sometimes-too-warm conditions of July.
Float plane flightseeing over glaciers and icefields
May offers spectacular visibility for flightseeing when weather cooperates - the extended daylight and angle of spring sun creates dramatic shadows across the Juneau Icefield. The 1,500 square mile icefield feeds 38 major glaciers, and flight tours range from 30-minute glacier overviews to 90-minute expeditions landing on ice. May conditions mean you might encounter more flight cancellations or delays due to variable weather compared to stable summer months, so build flexibility into your schedule. That said, the snow coverage is more complete and pristine than late summer when dirt and rock exposure increases.
Downtown cultural tours and Tlingit heritage sites
May is ideal for exploring Juneau's cultural attractions before peak crowds arrive. The Alaska State Museum, Sealaska Heritage Institute, and Last Chance Mining Museum all offer indoor options for rainy days, which you'll likely encounter. Walking tours covering the historic downtown district, Russian Orthodox church, and Governor's Mansion run rain or shine. The Tlingit cultural center often has carving demonstrations and traditional storytelling in May. These activities work particularly well as afternoon options when you've done morning outdoor activities and want something less weather-dependent.
May Events & Festivals
Juneau Jazz and Classics Festival
This long-running music festival typically spans 10 days in mid to late May, bringing classical musicians, jazz ensembles, and contemporary artists to venues across town. Performances range from intimate chamber concerts to larger evening shows at Centennial Hall. It's a genuine local event rather than tourist-focused, so you'll experience Juneau's arts community. Tickets for individual concerts run $20-45 USD, with festival passes offering better value if you plan to attend multiple shows.