Maratona Internacional de Porto Alegre

Mild 55°F temps at gun time mean comfortable early miles without overheating risk. Temperatures rising to 65°F through the course will gradually increase perceived effort in the second half. Light winds shouldn't be a major factor for pacing. High humidity (82%) will make it harder to cool down through sweat — increase fluid intake accordingly.

Race day forecast available in 235 days

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Distance: 26.2mi

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A mile-by-mile breakdown of where your time goes, weather-adjusted splits, fueling timeline with aid stations, packing checklist, carb tracker, spectator guide, all built around your goal and race-day conditions.

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Race Info

The Maratona Internacional de Porto Alegre is Brazil's oldest marathon, first held in 1983. The 42.195-kilometer course runs along the Guaíba River waterfront and through the historic city center, passing landmarks including the Mercado Público. A 2026 route redesign made it the flattest marathon in Brazil, with about 14 meters of total elevation gain.

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FAQ

When is the 2027 Maratona Internacional de Porto Alegre?

The 2027 Maratona Internacional de Porto Alegre will be held on Sunday June 6, 2027.

Is the Maratona Internacional de Porto Alegre a Boston Marathon Qualifier?

Yes, the Maratona Internacional de Porto Alegre is an official Boston Marathon qualifier.

What will the weather be like for the 2027 Maratona Internacional de Porto Alegre?

The forecast calls for a high of 66°F and a low of 54°F with a 9% chance of rain. Check our detailed hourly forecast above for the best marathon race plan.

Historical Weather

Based on 14 years of data

Avg Temp

56°F

L:52° H:61°

RunScore

Conditions

Rain Freq

14%

2 of 14 yrs

Wind6mph

Dew52°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2026 Maratona Internacional de Porto Alegre Partly cloudy throughout the day. 2026	58°/63°	-	60°
2025 Maratona Internacional de Porto Alegre Partly cloudy throughout the day. 2025	52°/57°	-	53°
2024 Maratona Internacional de Porto Alegre Clear conditions throughout the day. 2024	55°/73°	-	59°
2023 Maratona Internacional de Porto Alegre Clear conditions throughout the day. 2023	49°/67°	-	52°
2022 Maratona Internacional de Porto Alegre Clear conditions throughout the day. 2022	42°/49°	-	36°
2019 Maratona Internacional de Porto Alegre Partly cloudy throughout the day. 2019	60°/65°	-	60°
2018 Maratona Internacional de Porto Alegre Partly cloudy throughout the day with rain in the morning and afternoon. 2018	57°/65°	Light	59°
2017 Maratona Internacional de Porto Alegre Clear conditions throughout the day. 2017	48°/57°	-	48°
2016 Maratona Internacional de Porto Alegre Clear conditions throughout the day. 2016	37°/47°	-	35°
2015 Maratona Internacional de Porto Alegre Clear conditions throughout the day. 2015	48°/54°	-	43°
2014 Maratona Internacional de Porto Alegre Partly cloudy throughout the day. 2014	58°/60°	-	59°
2013 Maratona Internacional de Porto Alegre Partly cloudy throughout the day. 2013	50°/63°	-	52°
2012 Maratona Internacional de Porto Alegre Partly cloudy throughout the day with morning rain. 2012	59°/61°	Light	55°
2011 Maratona Internacional de Porto Alegre Partly cloudy throughout the day. 2011	53°/70°	-	57°