Alaska Mosquito Forecast

Alaska runs counter to its cold reputation: it has one of the most punishing summer mosquito seasons in the country. Months of frozen winter give way to vast tundra snowmelt and standing water, and the result is a short, intense window from June through August when clouds of mosquitoes blanket low-lying ground. Pressure is near zero outside that window — but inside it, few places bite harder.

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When is mosquito season in Alaska?

Alaska's mosquito season runs a short, intense window from June through August. Activity ramps up once overnight lows hold above about 50°F, and surges in the two to three days after rain, when fresh standing water triggers a new hatch. Outside summer it effectively disappears, which is why the season feels so concentrated when it hits.

Where are mosquitoes worst in Alaska?

Within Alaska, the most consistent pressure tends to land around Anchorage, Juneau, and Fairbanks. Low, wet ground near these areas turns spring snowmelt and rain into prime breeding habitat. Anywhere near rivers, marshes, lakes, or recent flooding will read higher than the surrounding area — exactly the kind of local detail the live map above is built to show.

How the Alaska forecast works

MosquitoCast estimates Alaska's mosquito activity from live weather — temperature, humidity, wind, and recent rainfall — layered on the area's long-term rainfall climate, elevation, and terrain, and refreshed every day from NOAA's forecast data. It's the same model nationwide, so the reading for Alaska is directly comparable to anywhere else in the country.