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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Canada Perspective Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Ottawa’s weather today, as shown in the live forecast above, brings a mix of sun and cloud with seasonal temperatures. The capital sits in the Ottawa Valley, where the Ottawa River and Gatineau Hills often modify local conditions, keeping afternoons mild and evenings cool.
What is the weather forecast for Ottawa today?
According to the live forecast above, Ottawa will see a high near the seasonal norm, with a light breeze from the northwest. The Rideau Canal corridor and downtown core may feel slightly warmer due to urban heat island effects, while neighbourhoods closer to the Greenbelt could be a degree cooler. No significant precipitation is expected this afternoon, making it a good day for a walk along the ByWard Market or the Ottawa River pathways.
How does the Ottawa River influence local weather?
The Ottawa River acts as a natural temperature regulator, especially in spring and fall. Cooler water in early summer can keep shoreline areas a couple of degrees cooler than inland neighbourhoods like Kanata or Orleans. Conversely, during autumn, the river’s stored heat can delay the first frost in riverside communities. This effect is most noticeable in the low-lying areas near Jacques-Cartier Park and the Chaudière Falls.
Will it rain later this week?
Thursday brings a chance of afternoon showers as a weak trough moves east from Algonquin Park. Rainfall amounts should be light, under 5 millimetres, but clouds may linger into the evening. Friday looks clearer and slightly warmer.
How should I prepare for the changing season?
As we approach autumn, layering becomes key. Mornings in the Ottawa Valley can be 10–12°C cooler than afternoon highs. Keep a light jacket handy, especially if you plan to cycle along the Rideau Canal or visit Gatineau Park.
Is there a heat warning or special alert?
No heat warnings are currently posted for Ottawa. The live forecast above shows temperatures within seasonal norms. For any sudden changes, check the Environment Canada alerts on our Weather Warning page.
Sources
For broader coverage of Canada’s weather, visit our Canada weather hub or check the latest conditions in Ottawa Weather.