Seattle weather: Morning clouds, sunny afternoons this weekend

Published September 18, 2026 3:06 PM PDT

After a stretch of warmer weather, we're settling into a much more typical late-September pattern across western Washington.

Onshore flow is back, which means morning clouds will be making a daily appearance through the weekend and into early next week. The good news is that the clouds should break up across the interior each afternoon, bringing back sunny afternoons.

Friday night will be cool, with temperatures dropping into the upper 40s and low 50s.

A map showing the overnight low temperatures expected in Western Washington on Friday night.

Expect increasing clouds overnight Friday with cool morning temperatures. (FOX 13 Seattle)

Sunshine returns this weekend in Seattle

What's next:

Saturday will start gray in many spots, and the clouds could hold on a little longer than Friday. The Puget Sound area will see increasing sunshine with highs climbing into the low to mid 70s. Along the coast, temperatures will stay cooler, mainly in the mid 60s.

A map showing the futurecast for clouds and rain on Saturday morning.

A marine layer will push inland on Saturday morning. (FOX 13 Seattle)

Sunday looks very similar, with morning clouds followed by afternoon sunshine. Highs will again be in the low to mid 70s for the greater Seattle area.

Weather pattern change next week

Big picture view:

Forecast models are signaling a shift in the overall weather pattern next week with the potential for weather systems to move into western Washington. The first half of next week should remain dry, but chances of rain will increase late this week as we head into fall.

The 7 day forecast for the greater Seattle area.

It will be mild this weekend with morning clouds and afternoon sunshine. (FOX 13 Seattle)

Seahawks vs. Cardinals in Arizona

The Seattle Seahawks are taking on the Arizona Cardinals on Sunday in Glendale, Arizona. If you're traveling to Arizona, it will be hot for game day with mostly sunny skies.

The Seahawks game day forecast.

The Seahawks will head down to a hot Glendale, Arizona for Sunday's matchup against the Cardinals. (FOX 13 Seattle)

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The Source: Information in this story comes from weather models interpreted by the FOX 13 Seattle weather team.

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