BEFORE YOU SWIM

Check Conditions

Before heading out, always review current river conditions. Factors like rainfall, wind, and tides can change the water’s behavior quickly.

• Weather: Strong winds and heavy rainfall can make swimming more dangerous through increased choppiness, debris and degraded water quality.

• Water temperature: Cold shock is a real risk. Avoid swimming when the water is below 65°F.

• Flow and current: Higher flows mean stronger currents.

You can check the Willamette River’s current temperature, velocity, and more at the U.S. Geological Survey site.

CORE SAFETY PRACTICES

1. Know Your Limits

Open-water swimming requires endurance. If you haven’t recently swum ½ mile in a pool, consider wearing a PFD; fins can also improve safety.

2. Never Swim Alone

Always bring a buddy. If you are swimming a longer distance, consider bringing a safety paddler (kayak/SUP) for extra visibility and support.

3. Stay Close to Shore

The center channel is unpredictable and shared with motorized vessels. Near-shore swimming is safer and easier to exit quickly if needed.
For cross-channel swims, consider join a HAP River Hugger Swim where safety support is provided.

4. Be Visible

If you decide to swim further out from shore, make it easy for boaters and others to see you.

• Wear a bright swim cap

• Carry a whistle

• Use a safety buoy or dry bag (bonus: it provides floatation and storage)

You can purchase these items on the HAP River Hugger website.

5. Avoid Swallowing Water

Especially after heavy rains or when an HCB is present.

6. Don’t Swim Under the Influence

Alcohol and drugs impair judgment, strength, and reaction time.

7. Learn CPR

Basic life-saving skills can make a critical difference in an emergency.

8. Leave No Trace

Pack out all trash, pick up extra litter when you can, and help keep the river clean for everyone.

Risks

There are no lifeguards on the Willamette. By swimming, you accept the inherent risks of open-water recreation. HAP provides safety guidance to help you make informed, responsible choices.

Harmful Algae Blooms (HABs)

During warmer months, certain areas of the river may be affect by harmful cyanobacteria blooms (HCBs). These algae blooms can pose health risks to people and pets. Stay out of the water if it looks bright green, scummy or thick like blue green paint as this might be a sign of an HCB. For more information on Willamette River water quality click here.

Combined Sewer Overflows (CSOs)

While rare, CSO events can occur during extreme rain. Check Environmental Services alerts before swimming after major storm events.

Superfund Areas

Not all portions of the river are suitable for swimming. Learn where you can and can't swim on the Willamette on the Portland Park's and Recreation River Swimming page.

Boat Traffic

Motorized boats, jet skis, and large vessels may not notice swimmers, especially in the channel. Staying close to shore and using visibility gear greatly improves safety.