Spring swimming holes in Washington

Where the spring swimming is in Washington

The Cascade rivers — Snoqualmie, Skykomish, Wenatchee, Yakima — the Olympic Peninsula pools and hot springs, the Columbia Gorge, and the warm lakes of the eastern half.

In this directory, Olympic Hot Springs are among the spring spots we document in Washington. The full list below reaches Port Angeles and Seattle.

West-side rivers are cold and snowmelt-fed into July; eastern lakes reach the mid-70s°F.

Reading conditions before you go

Springs are the one water type that ignores the seasonal calendar. A 72°F spring feels warm in February and startlingly cold in August, and its flow barely changes with the weather.

Clarity is the draw and it is also fragile. Silt kicked up by swimmers takes hours to settle, so the early arrivals get the clear water.

Hot springs need a temperature check every time. Source pools at undeveloped springs can exceed 140°F. Test downstream of the vent by hand before any part of you goes in.

In Washington, the Washington State Department of Health publishes the water-quality and algal-bloom advisories that apply to these waters. Check them alongside the live gauge data rather than instead of it.

Spring safety in Washington

Never put your head under at a hot spring. Warm freshwater is where Naegleria fowleri lives, and the CDC advice is explicit: keep your head above water in hot springs, and hold your nose or wear a nose clip if you jump in anywhere warm and still.

Spring vents and cave systems have killed experienced divers. Do not enter an underwater conduit, however inviting, without cave-diving training and gear.

Cold springs cause cold-water shock precisely because the air is hot. A 58°F Ozark spring on a 95°F day triggers the same gasp reflex as winter water.

Cascade rivers are cold enough for cold-water shock on the hottest days of the year, and drownings cluster on the first hot weekend of summer when the water is still at snowmelt temperature. Olympic hot springs have had closures for bacteria.

Cold water deserves more respect than most swimmers give it. The National Weather Service notes that cold shock can be as severe at 50-60°F as at 35°F, and that the involuntary gasp reflex can be triggered by water as warm as 77°F — which is why entering slowly matters even on a hot day.

When to go

Washington swims late june through september, with the most reliable water july to early september. Eastern Washington lakes warm earlier and stay warm later than the west side.

Springs are the most reliable water in any state: swimmable in shoulder season when everything else is too cold, and refreshing when everything else has gone bath-warm.

1 of these listings carry their own best-time note from the land manager or from reader reports — open them for the specifics rather than relying on the state-wide window alone.

What to bring: A nose clip, water shoes for limestone and travertine, and a towel — spring air is often cool even in summer.