If you’ve ever wanted to paddle through glowing water, you’re in luck! Washington is one of the best places in the country to experience bioluminescence, and we’re currently entering the best time of year for it. From the sheltered bays of Puget Sound to the San Juan Islands, our coastline comes alive on summer nights with flashes of electric blue light.
First, what exactly is bioluminescence? It’s the natural production of light by living organisms. In Washington’s marine waters, the glow usually comes from tiny plankton called dinoflagellates. When the water is disturbed (by a kayak paddle, a passing fish, or even gentle waves) they emit brilliant blue-green flashes.
If you’re hoping to catch the phenomenon near Seattle, your best bet is to go away from the city lights. While bioluminescence can appear throughout Puget Sound, darker locations offer a much better view. Popular spots include Whidbey Island, Deception Pass, Hood Canal, and the San Juan Islands. Whidbey and Deception Pass are easy day trips from Seattle, while the San Juan Islands offer one of the country’s most spectacular displays of bioluminescence. The islands’ strong tidal currents create ideal conditions for healthy plankton populations, making them a favorite destination for bioluminescence seekers.
Timing also matters. The best time to see bioluminescence in WA is between June and mid-September, when warmer water encourages plankton blooms. For the brightest displays, plan your outing on a dark, moonless night and wait until at least an hour after sunset. The less moonlight and artificial light, the easier it is to see the glowing water.
Finally, consider booking a guided tour. You don’t need a guided tour to experience bioluminescence, but it can be a big help. Local guides know where conditions are most favorable, provide the necessary safety equipment for nighttime paddling, and can help you find the brightest displays. Whether you’re exploring the San Juan Islands, Bellingham, Whidbey Island, or other parts of Western Washington, bioluminescence guided tours in the state abound.
