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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.
Check the live forecast above for South River’s current conditions and 7-day outlook; this page explains what those numbers mean for your day, whether you’re commuting, planning outdoor work, or checking the weekend.
What conditions should I expect today in South River?
Based on the live forecast above, expect temperatures near the reported high and low with variable cloud cover typical of this transition zone between Lake Nipissing and Algonquin Park. Winds remain light to moderate, and any precipitation shown—rain or snow depending on the season—tends to arrive in afternoon or evening hours. Check the radar loop for short-term timing.
How does South River’s weather compare with North Bay and Toronto?
South River sits roughly 50 kilometres southeast of North Bay, so its daily highs and lows usually mirror north bay weather within a degree or two, though valley fog can develop faster here. Toronto weather runs 4–6°C warmer in most seasons because of urban heat and lake moderation; South River sees more snow and sharper nighttime cooling.
How accurate are South River hourly forecasts?
Hourly projections (south river weather hourly) are reliable within 48 hours; beyond that, the trend is more useful. Environment Canada updates them every 6 hours, and the live forecast above uses that data.
Where can I see live radar for this area?
The south river weather radar composite from Environment Canada covers the region using the Franktown and King City sites. Loops are available on our Canada weather hub and directly from weather.gc.ca.
Is South River prone to lake-effect snow?
Yes, although less than areas directly on Georgian Bay. When cold northwesterly winds cross Lake Nipissing and align with the Mattawa River valley, South River can see enhanced snow squalls—typically adding 5–15 cm over a 12‑hour event.