Weather: Bay to Breakers
Historical weather data for race day in May. Use this to plan your race strategy, clothing, and hydration.
16°C
Temperature
Range: 12°C – 19°C
72%
Humidity
Moderate
15%
Rain Chance
Low chance of rain
May
Typical race month
Usually on a Sunday
Conditions
Cool and crisp San Francisco spring weather with moderate fog possible in morning hours. Strong ocean winds can develop mid-race, especially toward Ocean Beach.
What to Wear
Singlet or short sleeve
Ideal racing temperatures
Hydration Strategy
Before the Race
Normal hydration. Drink to thirst in the 24 hours before. Avoid over-hydrating.
During the Race
Drink at aid stations every 3-4km. Alternate water and sports drink.
After the Race
Rehydrate within 30 minutes of finishing. A drink with electrolytes and some protein helps recovery.
Get Your Training Plan
Free, personalized for this race
Get alerts for Bay to Breakers
Registration openings, date changes, sell-out warnings.