A heat advisory remains in effect in Seattle and across much of western Washington through early Tuesday as unusually warm temperatures and mild overnight conditions continue to affect the region.
The advisory was issued not only because of daytime highs nearing 90 degrees, but also because temperatures have remained elevated overnight, making it difficult for residents to cool down. Early Monday morning, some Seattle neighborhoods were still reporting temperatures in the 70s, while many areas around Puget Sound were expected to stay in the 60s for much of the night. Forecasters warned that the warm nights could create uncomfortable sleeping conditions, particularly in homes without air conditioning.
The heat follows a record-setting day on Sunday, when Sea-Tac Airport reached 89 degrees, breaking the previous June 14 record. Another hot day is expected Monday, with temperatures in Seattle and surrounding communities likely approaching or exceeding 90 degrees. Areas including Tacoma, Olympia, Auburn, Puyallup and Issaquah are among those forecast to experience the hottest conditions.
Forecasters described the event as a short but significant two-day heat wave, noting that the combination of high daytime temperatures and limited overnight relief increases the risk of heat-related illness. Residents are encouraged to stay hydrated, limit strenuous outdoor activities during the hottest part of the day and check on vulnerable family members, neighbors and pets.
The heat advisory is scheduled to expire at 5 a.m. Tuesday as cooler marine air begins moving inland. Coastal communities are expected to see relief first, with fog and low clouds returning late Monday and bringing temperatures back down into the 60s.
By Tuesday, a stronger marine push is expected to spread across the Puget Sound region, replacing the hot weather with cooler temperatures, increased cloud cover and the possibility of light mist or drizzle. Temperatures are then expected to return to more typical June levels, mostly in the 70s, for the remainder of the week.
In the meantime, if you need a place to cool down in Seattle today, you can visit your local community center, one of the 21 Seattle public library locations with AC, or your local pool, beach, or spray park. You’ll find more locations and tips on seattle.gov.
