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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the True North Brief Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Chemainus sees a mild coastal climate with temperatures typically ranging from 4°C to 22°C year-round, meaning cool winters and comfortably warm summers. The live forecast above shows today’s conditions, so plan around the current high and chance of rain.
What is the typical weather pattern in Chemainus?
Chemainus sits on the east coast of Vancouver Island, shielded from open-ocean storms by the island’s mountain spine. The result: wet autumns and winters (November–February average ~150 mm monthly precipitation) and drier summers (July–August average ~25 mm). Daily highs in July hover near 22°C, while January highs sit around 6°C. Frost is infrequent, and snow falls only a few days each winter, usually melting within 24 hours.
How does Chemainus weather compare to Victoria, Nanaimo, and Duncan?
Chemainus is slightly warmer than Duncan in winter (by about 1–2°C) and very similar to Nanaimo year-round. Victoria, farther south, is drier and sunnier, especially in summer. For a broader picture of coastal variability, check the live Vancouver Weather page. For hour-by-hour or extended outlooks, search “chemainus weather hourly” or “chemainus weather 30 days” through Environment Canada.
Does Chemainus get a lot of fog?
Yes, especially in autumn and early winter. Cool air settles over the Strait of Georgia, creating morning fog that usually burns off by midday. Visibility can drop below 1 km, so drive carefully near the waterfront.
Is Chemainus prone to heatwaves?
Heatwaves are rare but possible during strong ridge patterns. The highest recorded temperature is about 35°C, but most summers top out at 28°C. For health guidance during extreme heat, refer to Health Canada.
Where can I find reliable Chemainus radar and warnings?
Environment Canada’s “chemainus weather radar” feed covers the Strait of Georgia. For active alerts, see the Weather Warning page. The “chemainus weather environment canada” link gives the official bulletin.