Cobourg, Ontario Weather
Cobourg, Ontario — live current conditions, hourly and 7-day forecasts, ECCC alerts, aviation weather, radar and satellite imagery, marine and fishing conditions with a solunar forecast for Cobourg in Northumberland.
Marine forecast and fishing conditions near Cobourg.
Flight conditions near Cobourg. Data source: locating…
About Cobourg, Ontario
Cobourg is a town in Northumberland, Ontario, Canada. It has a population of 20,519. Cobourg is located at 43.9631°N, 78.1647°W. It observes Eastern Time (UTC−5 / −4). Postal code area: K9A.
Cobourg rests upon the northern shore of Lake Ontario, where the horizon dissolves into a vast, slate-blue expanse that dictates the temper of the local air. It lies 39.9 km south-south-east of Peterborough, ON (from Peterborough, ON: bearing 160°T), and is situated 11.7 km west-south-west of Grafton. The land rises with a quiet insistence toward the Pidgeon Hill, a feature that anchors the terrain against the wider, flatter fields of the surrounding Northumberland countryside. When the wind moves off the water, it carries a sharp, metallic clarity that lingers in the streets, cooling the summer heat and defining the boundary between the earth and the endless, open sky. The history of Cobourg is deeply rooted in its function as a port, a place where the movement of goods and people across the water shaped its early prosperity and subsequent growth. While the economy has shifted away from the heavy reliance on maritime trade that once defined its docks, the influence of industry remains visible in the sturdy, brick-built architecture that stands along the main thoroughfares. Nearby, the Ganaraska River flows through the landscape about 10 km away, and the Ganaraska Millenium Conservation Area, also situated about 10 km from the center, continues to serve as a reminder of the region’s commitment to preserving the natural corridors that sustain the local ecology. Life in Cobourg maintains a distinct character, marked by a balance between the quiet persistence of its heritage and the seasonal influx of those drawn to its lakeside charm. The community finds its rhythm in the annual gatherings and summer festivals that transform the waterfront into a focal point for public life, casting a golden, flickering light against the Victorian facades of the downtown core. This setting has long attracted individuals who value a deliberate pace, fostering an environment where the intersection of civic tradition and the natural presence of Lake Ontario creates a singular sense of belonging.
Live animated radar for Cobourg and surroundings — RainViewer.
NOAA GOES-19 GEOCOLOR — Canada / Northern U.S. sector. Auto-refreshes every 10 minutes on page reload. Frames the whole country from Newfoundland to the BC coast, plus adjacent Pacific and Atlantic storm approaches.
Source: NOAA/NESDIS GOES-19 · Public domain · Sector code can (Canada / Northern U.S.) · Auto-updates on page reload
| Location | Cobourg, Northumberland, Ontario |
| Coordinates | 43.963056°N, 78.164722°W |
| Timezone | Eastern Time (UTC−5 / −4) |
| Postal FSA | K9A |
| Area Code | 226, 249, 289, 343, 365, 382, 416, 437, 519, 548, 613, 647, 705, 742, 807, 905 |
| Page generated | July 2026 |
| Weather data | Open-Meteo (open-source), Environment and Climate Change Canada |
About This Cobourg, Ontario Weather Page
This page provides live weather conditions and forecasts for Cobourg, Ontario, including current conditions, a 24-hour hourly forecast, 7-day outlook, ECCC extended text forecast, real-time aviation weather (live METAR and TAF reports from the nearest reporting airport, with a modelled estimate shown when no station is in range), precipitation radar and NOAA GOES satellite imagery. Additional sections may include marine and fishing conditions with a solunar forecast for coastal localities, and soil temperature, crop weather and live Water Survey of Canada river gauge data for agricultural areas near a monitored waterway. All data updates automatically on every page visit.
Location data for Cobourg includes coordinates 43.963056°N, 78.164722°W, situated in Northumberland. Postal FSA: K9A. Telephone area code: 226, 249, 289, 343, 365, 382, 416, 437, 519, 548, 613, 647, 705, 742, 807, 905. Timezone: Eastern Time (UTC−5 / −4).
Weather data is sourced from Environment and Climate Change Canada (ECCC) and the open-source Open-Meteo API. Aviation data is sourced from aviationweather.gov, with a modelled estimate used where no nearby reporting station is available. River and stream data is sourced from Water Survey of Canada (WSC) via the ECCC GeoMet realtime hydrometric feed. Marine and solunar data are modelled from Open-Meteo and public sunrise/moon calculations and should be treated as a general guide alongside on-the-water conditions. Radar is provided by RainViewer. Satellite imagery is sourced from NOAA/NESDIS GOES-19 and is public domain.