Port Union, Ontario Weather
Port Union, 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, soil and crop conditions for Port Union in Ontario.
Marine forecast and fishing conditions near Port Union.
Flight conditions near Port Union. Data source: locating…
Soil conditions, frost risk and crop weather for Port Union.
About Port Union, Ontario
Port Union is a urban community in Ontario, Ontario, Canada. It is classified as a small locality. Port Union is located at 43.7795°N, 79.1352°W. It observes Eastern Time (UTC−5 / −4). Postal code area: M1C.
Port Union rests firmly upon the northern shore of Lake Ontario, where the land yields to the expansive reach of the water. It lies 14.9 km south-east of Markham, ON (from Markham, ON: bearing 136°T), and is situated 11.8 km south-west of Ajax. The air here carries a persistent, cool dampness, especially at dusk when the light flattens against the surface of the lake and turns the horizon into a thin, silver blade. Beyond the immediate waterfront, the terrain rises toward Dicksons Hill, grounding the neighborhood in a quiet elevation that overlooks the Rivière Rouge as it makes its slow, deliberate journey toward the lake. The history of Port Union lingers in the deliberate pace of its streets, where the influence of the nearby Parc urbain national du Canada de la Rouge provides a sense of vast, protected space. Once a site defined by its connection to industrial transit, Port Union now balances the memory of its working-class roots with a modern domestic character that favors the shade of mature trees and the steady, rhythmic sound of the wind coming off the water. Residents move through their day with a grounded focus, finding beauty in the way the morning mist clings to the banks of the Rivière Rouge before the sun rises high enough to pull it toward the sky.
Live animated radar for Port Union 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 | Port Union, Ontario, Ontario |
| Coordinates | 43.7795°N, 79.13517°W |
| Timezone | Eastern Time (UTC−5 / −4) |
| Postal FSA | M1C |
| 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 Port Union, Ontario Weather Page
This page provides live weather conditions and forecasts for Port Union, 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 Port Union includes coordinates 43.779500°N, 79.135170°W, situated in Ontario. Postal FSA: M1C. 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.