Todays weather in Portland · 11 May 2026 · 4 min

Portland Heat Spike: 90° Tuesday, Then a Quick Cooldown

Portland is flirting with ninety degrees Tuesday before a sharp mid-week cooldown drops highs back to the mid-seventies. Get the full week's forecast — what to wear, when to plan outdoors, and the Mother's Day outlook.

Todays weather in Portland
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Portland Heat Spike: 90° Tuesday, Then a Quick Cooldown

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What's covered

Tuesday Heat Spike Warning

Tuesday is flirting with ninety degrees in Portland, and that's the number that shapes everything else about this week. A high-pressure ridge is pushing in hard, and it's going to drive temperatures well into the upper eighties across the Willamette Valley, with the Portland metro potentially touching ninety.

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Morning Clouds Afternoon Pattern

The other thing worth understanding is the daily rhythm this week is running on a consistent pattern, morning clouds followed by afternoon clearing. It's a classic early May setup, the marine layer holding on through the morning, then weakening enough to let afternoon sun through.

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Mid-Week Cooldown Confirmed

The Wednesday through Friday cooldown is now solidified. After Tuesday's spike, Portland settles into the mid-to-upper seventies for the rest of the work week.

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What To Wear This Week

Here's the practical read on what this forecast means for how you move through the week. Tuesday, treat it like summer.

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Mother's Day Outlook Sunday

Looking ahead to the weekend, Sunday morning starts in the upper fifties to low sixties, mostly cloudy. That sounds uninviting, but the afternoon picture is better.

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Dry Week Dry Pattern

One more signal worth noting. There's no rain in this forecast.

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