Seattle is off to a cloudy, cool start at Boeing Field, with temperatures sitting near 56°F. The gray is not here to stay, though, as skies clear out this afternoon for mostly sunny weather and a high close to 76°F. Light southwest winds around 5 to 8 mph will tag along with the sunshine, while neighborhoods away from the water kick off a quicker warm-up heading into next week. Overnight lows will linger in the mid 50s to low 60s, so there will not be much nighttime cooldown as the warm stretch builds.
Afternoon Sun, Cool Mornings
Look for low clouds and patchy fog early near the water and into the city, with the marine layer burning off by mid-morning and giving way to pleasant, mostly sunny afternoons. Today’s high near 76°F should feel comfortable along the shoreline, with inland spots running a few degrees warmer once the clouds lift. Another round of morning stratus is likely Sunday, so plan on a cool start before the afternoon sun takes over again.
Heat Builds Monday And Tuesday
Temperatures take a clear step up from Sunday into early next week, with highs near 85°F Monday and around 89°F Tuesday for many inland areas. Shoreline neighborhoods will stay a bit cooler but still warm. Forecasters are calling this a "moderate heat risk" for the interior lowlands Monday and Tuesday as hot afternoons pair with warm nights. According to the National Weather Service Seattle, a strengthening ridge of high pressure will push most lowland highs into the 80s, with some locations pushing into the upper 80s.
Boaters, Fire Concerns And Marine Conditions
A Small Craft Advisory is in effect for parts of the outer coastal waters this morning, with seas expected to hold around 4 to 7 feet through Monday and gusty winds possible near the Strait of Georgia. The forecast discussion also flags elevated fire weather concerns Monday and Tuesday, as relative humidity dips into the 20s in some valleys and fuels move closer to critical levels. Skip outdoor burning, and use extra caution with any yard work that could spark a fire. For cooling resources and safety tips, check the City of Seattle.
What To Do Today
Layer up for the chilly start, then be ready to trade the jacket for sunscreen and a water bottle by afternoon. If you have outdoor plans Monday or Tuesday, shift tougher activities to the morning or evening, keep an eye on neighbors who do not have air conditioning, and stay tuned to updated forecasts and advisories as the heat ramps up.
