Runners will face a temperature rise from 53°F at the start to a high of 78°F. With a light wind from the ENE at 10 mph and low humidity at 32%, conditions are favorable. However, as temperatures climb, runners should pace conservatively, especially in the latter stages, to maintain performance.
Pre-raceRace windowPost-race
The Carlsbad Marathon started out as the San Diego Marathon. It is said to be one of the oldest races on the West Coast. In 1978, The Heart of San Diego Marathon, was created and thus there were 2 marathons in San Diego. When InMotion Inc. was hired to put on the marathon, they made the decision to combine the two marathons and then eventually the marathon was moved from San Diego to Carlsbad.Wikipedia
Course Map
FAQ
When is the 2026 Carlsbad Marathon?
The 2026 Carlsbad Marathon will be held on Sunday January 18, 2026.
Is the Carlsbad Marathon a Boston Marathon Qualifier?
Yes, the Carlsbad Marathon is an official Boston Marathon qualifier.
Historical Weather
Based on 28 years of data
Avg Temp
64°F
L:47° H:66°
RunScore
Conditions
Rain Freq
11%
3 of 28 yrs
Wind8mph
Dew44°F
Temperature History
Range of temperatures during race hours for each year.
