Where do you swim when Thetis Lake is off limits again?

If you've lived in View Royal or Colwood for more than a summer or two, you already know the drill. The heat arrives, the beach at Lower Thetis Lake fills up by ten in the morning, and at some point in July a sign goes up warning that the water isn't safe. This year is no exception. But the pattern underneath it is worth a closer look, because it isn't really about one bad summer. It's about what happens when the neighborhood's default swimming hole quietly stops being dependable during the exact weeks everyone wants it most.

A Bloom That Keeps Coming Back

The Capital Regional District posted a blue-green algae advisory for the main beach at Lower Thetis Lake on June 24, 2026. As of the CRD's own alert update on July 31, that advisory was still in effect, alongside similar advisories at Prior Lake, the smaller swimming hole inside the same regional park, and Beaver Lake over in Saanich.

That's five straight weeks, from late June through the CRD's July 31 update, with the region's most popular freshwater beach sitting under a swim warning right through the hottest stretch of the year.

What makes this worth noticing isn't just the current closure. It's the one before it. Local news coverage from earlier this year reported that the advisory issued during the summer of 2025 didn't get lifted until January 30, 2026, meaning last year's bloom carried straight through fall and into winter before the CRD called the water clear again. Thetis Lake's main beach had roughly five clean months, from late January to late June, before the next advisory landed. Stack the two events together and over the past year, the lake has spent more time posted with a warning, or only recently cleared of one, than it has spent reliably, unquestionably open.

That's not the profile of a fluke. It's the profile of a lake that, at least for now, can't be counted on to be open on any given weekend between June and September.

The CRD explains the mechanism plainly on its own alerts page:

"As of July 31, 2026, advisories are in place for Prior Lake, Thetis Lake and Beaver Lake. We continue to monitor water quality in the lake system."

Blue-green algae, technically cyanobacteria, tends to build up in warm, still, nutrient-rich water, exactly the conditions that show up in shallow regional lakes during a dry, hot Vancouver Island summer. The bloom isn't always visible as surface scum, either. Island Health notes that toxins can be present even when the water looks clear, which is part of why advisories stay in place until repeated sampling comes back clean rather than lifting the moment the water looks better.

The Ocean Side Has Quietly Become Plan A

Here's the part that changes how a lot of Colwood and View Royal residents actually plan their August: the closest reliable alternative to Thetis Lake isn't another lake. It's saltwater, seven minutes down the road.

Esquimalt Lagoon sits at the base of the Royal Roads University property, along Ocean Boulevard in Colwood, with Fisgard Lighthouse anchoring the far end of the view. The lagoon itself is calm, shallow water protected by Coburg Spit, a nearly two-kilometre sand and gravel barrier that separates it from the open strait. On the ocean side of that same spit is a long sandy beach facing the Strait of Juan de Fuca, popular for sunbathing and beach walks in summer.

As of the most recent Greater Victoria beach advisory roundup in July 2026, seven local beaches were flagged as unsafe for swimming. Three were the familiar lake trio, Thetis, Prior, and Beaver, hit by blue-green algae. The other four, including Gonzales Bay, Esquimalt Gorge's Kinsmen Beach, and Ross Bay, were flagged for high enterococci bacteria instead. Esquimalt Lagoon wasn't on either list.

That absence is the whole story. It doesn't mean the lagoon is guaranteed clear all summer. It does mean that on the same day one of the region's busiest freshwater beaches has been closed for over a month, the Colwood waterfront has been open the entire time.

Here's how the three most-used local swim spots stack up right now:

The trade-off is real. Thetis Lake, when it's open, is genuinely warmer and calmer, with a sandy beach, washrooms, and a boat launch that make it the easier day out for families. Esquimalt Lagoon's ocean side is cold year round and has no lifeguard on duty, so most people treat it as a walking and wading beach rather than a swimming destination in the traditional sense. But cold and open beats warm and closed, and that's increasingly the choice residents are actually making by mid-August.

One More Thing Before You Load the Cooler

If your plan involves biking to either spot, it's worth a quick check before you go. The CRD's alerts page has also flagged a temporary closure on the Galloping Goose Regional Trail on the View Royal stretch between the Island Highway and Watkiss Way this year. If your usual route to Six Mile Road runs through that section, give yourself a few extra minutes to find the detour rather than discovering it at the trailhead.

A short checklist for anyone heading out this month:

• Check the CRD's current alerts page the morning you leave, not the night before. Advisories can lift or extend with little notice.
• If you're set on Thetis Lake, Prior Lake is inside the same regional park and shares the current advisory, so don't treat it as a backup.
• Dogs are barred from the Thetis Lake main beach and picnic area between June 1 and September 15 regardless of advisory status, leashed passage only.
• At Esquimalt Lagoon, dogs must stay leashed within the migratory bird sanctuary, and shellfish harvesting along the lagoon is prohibited due to contamination, so it's a look-don't-eat spot for clams and mussels.
• If biking, check the Goose's View Royal segment for the Watkiss Way closure before you commit to that route.

Why This Is Worth Knowing If You're Already Here

None of this is really about algae. It's about the fact that the map of "where we swim" in this part of the Westshore has been quietly redrawing itself over the past two summers, and most people haven't noticed because the shift happened one advisory at a time. Thetis Lake isn't going anywhere, and it will very likely be clean and packed again before this season ends. But the ocean side of Colwood's waterfront, the stretch most people used to think of as the scenic detour on the way to Fisgard Lighthouse, has turned out to be the more dependable place to actually get in the water when it counts.

That's the kind of small, specific knowledge that only comes from living here through a few of these summers in a row. It's also, honestly, the same instinct that matters when you're deciding which street to bid on or which listing photo is hiding a north-facing yard. The neighborhood tells you things over time that no single data point can.

If you're weighing a move within Colwood or View Royal, or just curious what your own street is worth in this market, Amanda Young can walk you through it. Let's talk about your next move, get a free home valuation or a personal market consult whenever you're ready.