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Summer is here! Surface water temperatures have warmed to 14-15 °C. Widespread algae bloom in Main Basin. Puyallup River discharge is very large. Extensive phytoplankton blooms in Central and South Sound, large patches and strands of macroalgae in South Sound/southern Central Sound.

Little sunshine, cold air temperatures, and higher river flows. Freshwater plumes extend far into the waterways. Chilly surface temperatures in Central Sound. First blooms begin in South Sound. A thinner freshwater layer at Mukilteo suggests a low discharge of the Snohomish river.

In the south a persistent marine layer over the lowlands keep conditions cooler. River flows are high. Water temperatures approach 15 °C. High fluorescence in the Main Basin Extensive red-brown blooms in South Sound. In Whidbey Basin, higher DO and algal bloom in surface waters.

River flows are below normal. Temperatures in Puget Sound are 12-14 °C. Extensive red-brown blooms in Inlets of South and Central Sound. Jellyfish are increasing in numbers. Low-moderate fluorescence in Central Sound. In Possession Sound dissolved oxygen decreased by 1.1 mg/L.

Large blooms in South Sound and Main Basin with abundant macro-algae. Very complex surface water masses that meet at a triple point in Main Basin. Widespread algae bloom in Main Basin; surface water temperatures warmed in the last few days to 13-14 °C. Dissolved oxygen levels remain high.

Cool weather and river flows above normal. A bonanza of red-orange Noctiluca streaks in Central Basin with reduced fluorescence south of Edmonds. Strong red-brown bloom in Case Inlet. Higher DO levels in Whidbey Basin surface water. Oil sheen in Sinclair Inlet.

Cloudy, slightly warmer-than-average air temperatures, and higher-than normal river flows. Freshwater plumes extend far into the waterways. Jellyfish from fall still persist in Budd Inlet. Chilly surface temperatures and pulses of high CDOM waters in Central Sound.

Warm temperatures, reminiscent of summer. Brown-red blooms in Carr Inlet and Budd Inlet. Macro-algae aggregations in Central Sound. Green bloom NE of Bainbridge Island. High surface fluorescence throughout northern Central Sound; highest values east of Port Madison. Oil spill in the South Sound.

Cool, wet, cloudy weather with higher-than-normal river flows. Spectacular river plumes, suspended sediment and wind extend far into the waterways. Surface debris abundant. The freshwater layer in Whidbey Basin increased by 2 m matching high precipitation.

Morning fog shows that fall is here! Warm afternoons with colder nights make cooler-than-normal conditions. Temperatures decrease and blooms fade as the summer growing season comes to an end. Brown-red blooms still in Carr Inlet and Budd Inlet. Green bloom near Squaxin Island.