Seattle started Sunday under a thick, stubborn cloud deck, with Boeing Field near 50°F, sticky humidity and a light breeze out of the south. Clouds are expected to thin into partly sunny skies by afternoon, and most lowland spots should land in the low to mid 60s. It is shaping up to be one last relatively mild day before the next system rolls in.
Rain Returns Monday, Afternoon Drive Looks Soggy
A frontal system moves in Monday, with rain mainly developing after noon and picking up through the late day and evening. Monday night is on track for the heaviest totals, with some areas looking at roughly a quarter to half an inch of rain. Tuesday stays unsettled with scattered showers and a chance of isolated thunderstorms. Those timing and rainfall details line up with the latest forecast from the National Weather Service.
Marine And Wind
Out on the water, coastal and northern inland areas will notice the shift first. Seas around 4 to 6 feet Sunday are forecast to build to 6 to 8 feet Monday, which will mean choppy conditions for smaller boats. Southerly winds could gust through Admiralty Inlet and the eastern Strait, so mariners and ferry riders would be wise to check marine notices before heading out.
Plan For The Week
Plan on a waterproof layer Monday and Tuesday, and give yourself extra time for a wet afternoon commute. A quick pattern change later in the week should flip the switch back to drier and warmer. Expect mostly sunny skies with highs in the upper 60s Thursday and into the low 70s by Friday, with the warmest readings likely for inland neighborhoods over the weekend.
