Grenadier Island, Ontario Weather

Marine forecast and fishing conditions near Grenadier Island.

Flight conditions near Grenadier Island. Data source: locating…

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

About Grenadier Island, Ontario

Grenadier Island is a locality in Leeds, Ontario, Canada. It is classified as a small locality. Grenadier Island is located at 44.4114°N, 75.8697°W. It observes Eastern Time (UTC−5 / −4). Postal code area: K7G.

Grenadier Island rests as a low-slung, granite-ribbed presence along the currents of the St. Lawrence River. It lies 25.3 km south-west of Brockville, ON (from Brockville, ON: bearing 215°T), and is situated 4.9 km south of Mallorytown Landing. The island’s terrain rises toward the modest elevation of the Quabbin Hill, where the soil holds the cool, damp memory of the receding ice. As the light wanes, the St. Lawrence River takes on a bruised, metallic sheen, reflecting the stillness of an environment that feels removed from the mainland’s urgency. Nearby, the Thousand Islands National Park of Canada preserves the jagged, rocky character of the region, while the distant Gananoque River flows through the mainland landscape, marking the wider reach of these waterways. The air here carries a sharp, mineral clarity, particularly at dusk when the granite outcrops seem to exhale the heat absorbed throughout the long, bright day. Life on Grenadier Island maintains a quiet persistence, shaped by the seasonal navigation of the surrounding channels and the demands of an island-based existence. Historically, the island served as a waypoint for those moving through the river corridor, its shores bearing the marks of early settlers who sought shelter among the trees and bedrock. Today, the local economy relies on a blend of seasonal residency and careful stewardship of the land, with the islanders observing a pace dictated by the rise and fall of the water levels. The social character of Grenadier Island centers on a shared respect for the river’s unpredictable moods, ensuring that the habits of those who dwell here remain in sync with the island’s enduring, stony solitude.

Live animated radar for Grenadier 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 Grenadier Island, Ontario Weather Page

This page provides live weather conditions and forecasts for Grenadier 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 Grenadier Island includes coordinates 44.411389°N, 75.869722°W, situated in Leeds. Postal FSA: K7G. 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.