Weekly swim report · August 21, 2026
Washington swim report
On August 21, 2026 the warmest USGS water reading in Washington was 78°F at YAKIMA RIVER AT VAN GIESEN BR NEAR RICHLAND, WA; 3 water-related NWS hazards are active.
Warmest water
The 5 warmest of 75 sensors reporting a water temperature in Washington today. Station names open the official monitoring page.
- #178°F 25°C9 hrs ago
- #2OSOYOOS LAKE NEAR OROVILLE, WAUSGS gauge76°F 24°C8 hrs ago
- #3OKANOGAN RIVER AT OROVILLE, WAUSGS gauge · 319 ft³/s76°F 24°C9 hrs ago
- #476°F 24°C9 hrs ago
- #5YAKIMA RIVER AT KIONA, WAUSGS gauge · 1,090 ft³/s75°F 24°C9 hrs ago
Active hazards in Washington
Alerts cover counties or forecast zones — an alert for an area does not mean every river or beach inside it is affected. Times are local to the issuing office.
- CautionHeat Advisory
A Heat Advisory is in effect for Wallowa County; Northern Blue Mountains of Oregon; Southern Blue Mountains of Oregon; Ochoco-John Day Highlands; Northwest Blue Mountains; Simcoe Highlands; Lower Slopes of the Eastern Washington Cascades Crest.
NWS Pendleton OR · until Aug 21, 10:00 PM
- CautionHeat Advisory
A Heat Advisory is in effect for Eastern Columbia River Gorge of Oregon; Lower Columbia Basin of Oregon; Grande Ronde Valley; John Day Basin; Foothills of the Northern Blue Mountains of Oregon; Foothills of the Southern Blue Mountains of Oregon; North Central Oregon; Central Oregon; Eastern Columbia River Gorge of Washington; Kittitas Valley; Yakima Valley; Lower Columbia Basin of Washington; Foothills of the Blue Mountains of Washington.
NWS Pendleton OR · until Aug 21, 10:00 PM
- CautionHeat Advisory
A Heat Advisory is in effect for Northern Panhandle; Coeur d'Alene Area; Idaho Palouse; Central Panhandle Mountains; Lewiston Area; Lewis and Southern Nez Perce Counties; Northeast Blue Mountains; Lower Garfield and Asotin Counties; Washington Palouse; Moses Lake Area; Upper Columbia Basin; Spokane Area; Northeast Mountains; Okanogan Highlands; Wenatchee Area; Okanogan Valley; Waterville Plateau; Central Chelan County; Western Okanogan County.
NWS Spokane WA · until Aug 21, 10:00 PM
Where to swim in Washington
The most-reviewed, well-rated water destinations in Washington — check each one’s live conditions before you go.
4.7(10,983)Riverfront Park
Site of the 1974 World's Fair featuring sculptures, a carousel & a cable ride over Spokane Falls.
4.7(9,945)Green Lake Park
Recreation area with trails, beach & boathouse, plus tennis courts, baseball fields & indoor pool.
4.7(5,044)Lake Sammamish State Park
512-acre park with ample waterfront access & boat launch, plus seasonal kayak rentals & picnicking.
4.6(4,691)Lake Union Park
12-acre lakefront park with boat launch, model-boat pond, Center for Wooden Boats & spray features.
4.7(2,788)Lake Wilderness Park
This 117-acre park in Maple Valley features a seasonal swim beach with lifeguards on the scenic 42-acre Lake Wilderness, plus boat rentals (no combustion engines). An 8-mile loop trail winds through a 42-acre arboretum with cultivated gardens, a nature preserve, and a Tribal Life Trail highlighting Native American plant use. Facilities include pickleball and tennis courts, a disc golf course, picnic shelters, and connections to the regional Cedar River Trail.
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Conditions are for general information only and can change quickly. Always judge the water in person and follow posted advisories and local guidance before swimming or paddling.