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Marathon, Ontario Weather

Marathon, 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 Marathon in Thunder Bay.

🌡️ Current Conditions
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24-Hour Forecast
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Current Conditions Detail
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7-Day Forecast
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ECCC Extended Forecast
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🌊 Marine & Fishing

Marine forecast and fishing conditions near Marathon.

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🎣 Best times to fish today (solunar)
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✈️ Aviation Weather

Flight conditions near Marathon. Data source: locating…

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🌿 Air Quality
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About Marathon, Ontario

Marathon is a compact rural community in Thunder Bay, Ontario, Canada. It has a population of approximately 3,138. Marathon is located at 48.7173°N, 86.3805°W. It observes Eastern Time (UTC−5 / −4). Postal code area: K2W.

Marathon clings to the rugged, granite-edged shore of Lake Superior, a settlement shaped by the imposing presence of the Peninsula Hill. It lies 53.3 km east of Terrace Bay, ON (from Terrace Bay, ON: bearing 97°T), and is situated 9.5 km north-west of Heron Bay. The air here holds a sharp, crystalline clarity, especially when the light of a fading afternoon pulls long, violet shadows across the rocky terrain. Beyond the immediate cluster of buildings, the land rises and falls with a stubborn, elemental strength, while the Pic River winds its way through the wilderness approximately 7 km away. The landscape demands a certain resilience from those who dwell within it, as the vast, deep waters of the lake exert a constant, cooling influence on the temperature of the days. The growth of Marathon emerged from the deliberate push of industry into the northern reaches of the province, transforming the quiet solitude of the Peninsula Hill into a functional hub. Workers arrived to clear the dense timber and establish the foundations of a settlement that would endure the long, biting winters. Early life in Marathon was defined by the steady pulse of the railway and the labor required to harness the natural wealth of the surrounding woods. Each structure built during those formative years reflects a functional pragmatism, serving as a shelter against the wide, indifferent horizon that defines the northern frontier. Today, the economic life of Marathon continues to rely on the extraction and processing of resources, maintaining a direct connection to the raw materials provided by the land. The presence of the forest industry and the movement of goods through the region anchor the livelihoods of many who call Marathon home. While the work is demanding, the quietude of the surroundings offers a profound counterpoint to the industrial noise of the mill. Marathon functions as a vital outpost, providing essential services that sustain the flow of commerce across this challenging, expansive stretch of northern geography. Cultural life in Marathon finds its expression in the quiet endurance of its people and their shared appreciation for the vast, untamed beauty that encircles them. While the region does not house major universities or large-scale institutions, the collective spirit of the residents is kept alive through local gatherings that celebrate the distinct character of life by Lake Superior. The horizon remains the primary landmark, an ever-changing canvas of grey, blue, and white that dictates the mood of the seasons. In the absence of grand monuments, the true identity of Marathon rests in the way the light catches the crest of the Peninsula Hill at dusk, illuminating a life lived in close proximity to the wild, northern elements.

📡 Precipitation Radar

Live animated radar for Marathon and surroundings — RainViewer.

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🛰️ Satellite Imagery

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.

NOAA GOES-19 GEOCOLOR — Canada / Northern U.S. sector
🎬 Animated loop 🔍 Higher resolution (1125×560) 🌡️ Infrared (IR) view 🇨🇦 ECCC Satellite Viewer

Source: NOAA/NESDIS GOES-19 · Public domain · Sector code can (Canada / Northern U.S.) · Auto-updates on page reload

🌙 Astronomy
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LocationMarathon, Thunder Bay, Ontario
Coordinates48.71733°N, 86.38051°W
TimezoneEastern Time (UTC−5 / −4)
Postal FSAK2W
Area Code226, 249, 289, 343, 365, 382, 416, 437, 519, 548, 613, 647, 705, 742, 807, 905
Page generatedJuly 2026
Weather dataOpen-Meteo (open-source), Environment and Climate Change Canada

About This Marathon, Ontario Weather Page

This page provides live weather conditions and forecasts for Marathon, 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 Marathon includes coordinates 48.717330°N, 86.380510°W, situated in Thunder Bay. Postal FSA: K2W. 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.