OC Marathon

Costa Mesa, CA, USA · May 2, 2027

59°·65° high·Light·Dry

Weather

Race Day Weather

59°at start

66° high

Breezy

Dry

Mild temps, strategic wind shifts

Runners will face a temperature range of 59°F to 65°F, with average humidity at 69%. Wind will start as a crosswind before shifting to a headwind from miles 2-3 and again from 21-24, making those sections challenging. Hydration should be a priority, and pacing adjustments are recommended, particularly during the headwind stretches to conserve energy for the tailwind sections from miles 8-15 and 19.

Race day forecast available in 240 days

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Distance: 26.2mi

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Race Info

The OC Marathon, established in 2004, starts near Fashion Island in Newport Beach and finishes at the OC Fair & Event Center in Costa Mesa. The course offers scenic coastal views as it winds through Newport Beach, Costa Mesa, and Santa Ana, hitting landmarks like the Segerstrom Center for the Arts. With a net downhill profile, it’s known for its mix of flat and rolling sections, though runners face a notable incline at mile 14.5 over the 405 Freeway overpass.

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FAQ

When is the 2027 OC Marathon?

The 2027 OC Marathon will be held on Sunday May 2, 2027.

Is the OC Marathon a Boston Marathon Qualifier?

Yes, the OC Marathon is an official Boston Marathon qualifier.

What will the weather be like for the 2027 OC Marathon?

The forecast calls for a high of 66°F and a low of 58°F with a 1% chance of rain. Check our detailed hourly forecast above for the best marathon race plan.

Historical Weather

Based on 20 years of data

Avg Temp

66°F

L:57° H:66°

RunScore

Conditions

Rain Freq

10%

2 of 20 yrs

Wind10mph

Dew47°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2026 OC Marathon Cloudy skies throughout the day. 2026	61°/65°	-	51°
2025 OC Marathon Cloudy skies throughout the day. 2025	56°/62°	-	50°
2024 OC Marathon Clearing in the afternoon with early morning rain. 2024	57°/62°	-	44°
2023 OC Marathon Partly cloudy throughout the day. 2023	56°/66°	-	49°
2022 OC Marathon Clearing in the afternoon. 2022	60°/70°	-	52°
2019 OC Marathon Clearing in the afternoon. 2019	60°/67°	-	51°
2018 OC Marathon Partly cloudy throughout the day. 2018	59°/72°	-	54°
2017 OC Marathon Partly cloudy throughout the day with rain. 2017	51°/61°	Light	48°
2016 OC Marathon Partly cloudy throughout the day. 2016	57°/66°	-	51°
2015 OC Marathon Clearing in the afternoon. 2015	61°/68°	-	52°
2014 OC Marathon Partly cloudy throughout the day. 2014	62°/74°	-	54°
2013 OC Marathon Cloudy skies throughout the day. 2013	61°/64°	-	51°
2012 OC Marathon Clearing in the afternoon. 2012	59°/68°	-	53°
2011 OC Marathon Clear conditions throughout the day. 2011	55°/81°	-	22°
2010 OC Marathon Clearing in the afternoon. 2010	56°/66°	-	47°
2009 OC Marathon Partly cloudy throughout the day. 2009	60°/66°	-	53°
2008 OC Marathon Cloudy skies throughout the day. 2008	58°/61°	-	50°
2007 OC Marathon Clear conditions throughout the day. 2007	45°/68°	-	35°
2006 OC Marathon Partly cloudy throughout the day. 2006	47°/59°	-	45°
2004 OC Marathon Partly cloudy throughout the day with a chance of rain throughout the day. 2004	50°/55°	Light	43°

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