Race-day weather · Wyndo for runners
Big Sur International Marathon weather
April 25, 2027 · Big Sur, CA · traditional start around 6:45 AM (America/Los_Angeles) — not yet confirmed for 2027. What the start usually feels like, year by year — and a live start-time read once the race confirms its schedule and race week arrives.
Countdown
277 days to race day
The live race-day forecast unlocks 271 days from now, when April 25, 2027 enters the 7-day forecast window. Until then, live hourly data is not available; the history below shows what race morning usually looks like.
The 2027 start time hasn't been published yet — the 6:45 AM start shown here is carried from a previous edition. We'll switch on the live start-time read when the race posts its schedule.
Typical start temp
52°F
median of 20 years
A warm year
54°F
75th percentile start temp
Rain at the start
0%
0 of 20 measured years
Race-morning weather history
Canonical hazard is wind, not heat — headwinds up Hurricane Point regularly gust 30+ mph, with coastal fog and mist common at the start. Wyndo tracks what this calendar slot has actually served up at the start hour — temperature, dew point, wind, and rain — including the years when weather canceled or disrupted the race, and reads the live forecast for the start once the race confirms its schedule and race week arrives.
Median start temp
52°F
p75 (a warm year): 54°F
Median dew point
47°F
at the start hour
Rain at the start
0%
0 of 20 measured years
Warmest start
57°F
in 2007
Scroll sideways to see all columns.
| Year | Start temp | Dew point | Wind | Precip (start hr) | Day's high |
|---|---|---|---|---|---|
| 2026 | 52°F | 50°F | 6 mph | dry | 58°F |
| 2025 | 51°F | 50°F | 6 mph | dry | 54°F |
| 2024 | 52°F | 51°F | 11 mph | dry | 59°F |
| 2023 | 51°F | 47°F | 13 mph | dry | 57°F |
| 2022 | 49°F | 45°F | 10 mph | dry | 62°F |
| 2021 | 51°F | 49°F | 6 mph | dry | 56°F |
| 2020 | 54°F | 48°F | 10 mph | dry | 64°F |
| 2019 | 55°F | 47°F | 4 mph | dry | 61°F |
| 2018 | 52°F | 49°F | 9 mph | dry | 58°F |
| 2017 | 52°F | 45°F | 8 mph | dry | 65°F |
| 2016 | 54°F | 51°F | 8 mph | dry | 59°F |
| 2015 | 51°F | 48°F | 12 mph | dry | 60°F |
| 2014 | 50°F | 46°F | 3 mph | dry | 60°F |
| 2013 | 54°F | 45°F | 10 mph | dry | 67°F |
| 2012 | 50°F | 48°F | 7 mph | dry | 65°F |
| 2011 | 53°F | 51°F | 6 mph | dry | 57°F |
| 2010 | 50°F | 43°F | 8 mph | dry | 67°F |
| 2009 | 47°F | 44°F | 13 mph | dry | 54°F |
| 2008 | 55°F | 46°F | 9 mph | dry | 69°F |
| 2007 | 57°F | 38°F | 5 mph | dry | 64°F |
Slot climatology: each row is the weather at this race's usual calendar slot and start hour (ERA5 reanalysis at the start line) — including years when the edition was canceled or moved. A computed slot date is not a claim the race ran that day.
Your heat-adjusted goal for the marathon
The same cited model as the full calculator, pointed at this race: the median start-hour conditions this calendar slot has served up — climatology, not a forecast.
Racing this one?
Skip the taper-week refresh spiral. Turn on race-day emails for the Big Sur International Marathon: the first outlook when it enters the 7-day forecast window, updates only when it changes meaningfully, and a final look the day before.
Email me when the Big Sur International Marathon forecast firms up
The first race-day outlook when your race enters the 7-day forecast window, an update when it changes meaningfully, and a final look the day before.
We'll email you a sign-in code. No password needed.
Race facts
- Start line
- Big Sur Station (ranger station), Highway 1
- Traditional start (not confirmed for 2027)
- 6:45 AM (America/Los_Angeles) — 6:45 AM marathon start per official race page (current-edition time; 2027 specifics not yet posted). Point-to-point up Highway 1; bus transport required.
- Field size
- 2025 marathon finishers 3,318; field capped around 4,500 marathon entrants
- Registration
- lottery (random drawing plus first-come guaranteed-entry programs)
Wyndo is not affiliated with or endorsed by the Big Sur International Marathon (officially the "Big Sur International Marathon") or its organizers. Race names are used descriptively to identify the event; schedules and start times belong to the race — always confirm details on the official site. Weather guidance here is informational, never medical advice, and event alert flags on race day belong to the race's own medical team.