WA weather: Highs in Seattle area could touch 90 on World Cup game day

When the whistle blows on Seattle's first World Cup game this Monday, a heat advisory will be in effect.

The National Weather Service issued a heat advisory for Seattle on Saturday afternoon, warning of hot conditions with high temperatures of up to 85 to 90 degrees and low temperatures of 60 to 65 degrees. The advisory will be in effect from 11 a.m. Sunday to 5 a.m. Tuesday.

The weather service also issued an advisory for most of Western Washington, including near Olympia and Chehalis, where temperatures could reach

mid- to upper 90s, according to weather service meteorologist Kayla Mazurkiewicz.

The heat will significantly increase the risk of heat-related illnesses for those who are sensitive to heat," the warning said, especially those without access to cooling and hydration.

The warmest daytime high temperatures are expected Monday afternoon and the warmest overnight lows are expected Monday night into Tuesday morning.

In other words: The hottest day will be when thousands of fans are congregating in and near the stadium and Seattle's many outdoor watch parties to catch a glimpse of the game (and others will be on the beach ignoring any soccer talk).

What can people do to stay cool?

"Definitely drinking plenty of water and encouraging people around you to do the same," Mazurkiewicz said. If possible, wear a hat, lightweight, loose-fitting and light-colored clothing, and apply sunscreen. Consider cooling towels and handheld fans, and make sure to take breaks in the shade, cooling tents or misting stations.

And, she added: Look out for each other. "So if you see someone having the first sign of dizziness or weakness, making sure you look for medical assistance."

For those looking for a cooling plunge, Mazurkiewicz cautioned that it's still early in the season, and that the water is still fairly cold. Dangers include cold water shock, which can increase the risk of drowning, so keep a close eye on children and pets, she said.

The warm and dry conditions predicted for Sunday and Monday raise concerns about fire conditions. Grasses and vegetation near roads "will be most susceptible" to brush fires, according to a weather service bulletin.

The temperatures will begin to decrease Tuesday. Temperatures going into the rest of the week are expected to remain in the upper 70s, low 80s. While the weather forecast can always change, for now, when the U.S. team takes on Australia on Friday, Mazurkiewicz said, "we will probably see a nice weather for that game.

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This story was originally published June 13, 2026 at 4:54 PM.