Cornwall Island, Ontario Weather

Marine forecast and fishing conditions near Cornwall Island.

Flight conditions near Cornwall Island. Data source: locating…

Soil conditions, frost risk and crop weather for Cornwall Island.

About Cornwall Island, Ontario

Cornwall Island is a locality in Stormont, Ontario, Canada. It is classified as a village / hamlet. Cornwall Island is located at 45.0114°N, 74.6811°W. It observes Eastern Time (UTC−5 / −4). Postal code area: K6H.

Cornwall Island rests low and steady against the persistent, shifting currents of the St. Lawrence River. It lies 3.9 km east-south-east of Cornwall, ON (from Cornwall, ON: bearing 115°T), and is situated 14.3 km west of Dundee. The land here holds a quiet gravity, defined by the meeting of earth and water where the Rivière Saint-Régis feeds into the broader channel. Near Lairds Hill, the horizon flattens into a persistent, open expanse, and the air carries a damp, metallic chill that clings to the riverbanks long after the sun has retreated. When the evening light catches the surface of the water, the river turns the color of hammered lead, reflecting the vast, unbroken sky that presses down upon the island’s shore. History persists on Cornwall Island not as a distant memory, but as a living practice, anchored in the traditions of the Mohawk people who have long called these banks home. The local economy and the daily movements of those living on Cornwall Island remain deeply connected to the river’s edge, where the passage of water dictates the tempo of the day. Modern life exists alongside older, enduring ways, visible in the careful maintenance of the land and the steady, purposeful work of the residents. Even in the silence between the gusts of wind, one can sense the weight of the river, a constant presence that shapes the character of the island and the people who walk its soil.

Live animated radar for Cornwall Island 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

About This Cornwall Island, Ontario Weather Page

This page provides live weather conditions and forecasts for Cornwall Island, 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 Cornwall Island includes coordinates 45.011389°N, 74.681111°W, situated in Stormont. Postal FSA: K6H. 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.