25 Big Sur Marathon race mornings since 2000, measured hour by hour: temperature, dew point, wind, rain, and what the weather cost runners. The forecast for the 2027 race goes live here on Apr 19, six days out.
The Big Sur Marathon course, mile by mile: the elevation, every climb, and how I’d run each stretch.
Built from the median race morning since 2000, averaged across the hours you’d be running. Where the weather costs time, each cell gives the adjusted finish time and the pace per mile to run instead. Six days out, the real forecast replaces it.
| Goal on a cool day | Adjusted finish |
|---|---|
| 2:456:18/mi | No changescore 100 |
| 3:006:52/mi | No changescore 100 |
| 3:157:26/mi | 3:15 to 3:167:26–7:28/mi0% to 0.5% slower · score 101 |
| 3:308:01/mi | 3:30 to 3:318:01–8:03/mi0% to 0.5% slower · score 101 |
| 3:458:35/mi | 3:45 to 3:468:35–8:37/mi0% to 0.5% slower · score 101 |
| 4:009:09/mi | 4:00 to 4:019:09–9:12/mi0% to 0.5% slower · score 101 |
| 4:3010:18/mi | 4:30 to 4:3110:18–10:21/mi0% to 0.5% slower · score 102 |
| 5:0011:27/mi | 5:00 to 5:0111:27–11:30/mi0% to 0.5% slower · score 102 |
Run your goal pace. The weather will cost you a few seconds in the last 10K, not the first, so bank nothing early and take water at every station after mile 10.
Race week, start to finish: how I’d run the three-week taper, what to take in during the race, how much to slow down in heat and humidity, and what the four weeks after should look like.
How I adjust pacing, fueling and the warm-up when race morning runs warm. One email when a new training note drops. No spam, unsubscribe anytime.
Every row in the table below is a measurement from the Monterey Regional Airport weather station, taken nearest 6:45am (today’s first-wave start) and again three hours later. Start times have moved over the years, so treat 6:45am as a clock time, not always the gun. Across 25 race mornings:
| Year | Date | Air / dew at 6:45am | Score | Air / dew at 9:45am | Score | Wind at 6:45am | Rain |
|---|---|---|---|---|---|---|---|
| 2026 | Apr 26 | 52° / 47° | 99 | 55° / 48° | 103 | SSE 5 mph | Trace |
| 2025 | Apr 27 | 53° / 49° | 102 | 53° / 50° | 103 | WSW 6 mph | 0.10 in |
| 2024 | Apr 28Out-and-back course after a Highway 1 slip-out | 53° / 49° | 102 | 57° / 49° | 106 | W 6 mph | Dry |
| 2023 | Apr 30 | 49° / 48° | 97 | 52° / 48° | 100 | WSW 7 mph | Dry |
| 2022 | Apr 24 | 51° / 48° | 99 | 57° / 48° | 105 | Calm | Dry |
| 2021 | – | Cancelled (COVID-19) | |||||
| 2020 | – | Virtual only (COVID-19), no race morning | |||||
| 2019 | Apr 28 | 52° / 45° | 97 | 54° / 45° | 99 | 6 mph | Dry |
| 2018 | Apr 29 | 54° / 48° | 102 | 56° / 50° | 106 | W 7 mph | Dry |
| 2017 | Apr 30 | 50° / 49° | 99 | 60° / 50° | 110 | SSE 3 mph | Dry |
| 2016 | Apr 24 | 54° / 50° | 104 | 57° / 51° | 108 | WSW 3 mph | Dry |
| 2015 | Apr 26 | 50° / 46° | 96 | 56° / 45° | 101 | S 6 mph | Dry |
| 2014 | Apr 27 | 53° / 41° | 94 | 60° / 48° | 108 | E 7 mph | Dry |
| 2013 | Apr 28 | 47° / 44° | 91 | 52° / 46° | 98 | E 7 mph | Dry |
| 2012 | Apr 29 | 51° / 48° | 99 | 54° / 50° | 104 | SE 5 mph | Dry |
| 2011 | May 1Out-and-back course after a Highway 1 collapse | 43° / 34° | 77 | 61° / 40° | 101 | E 3 mph | Dry |
| 2010 | Apr 25 | 45° / 41° | 86 | 59° / 47° | 106 | E 3 mph | Dry |
| 2009 | Apr 26 | 50° / 39° | 89 | 52° / 39° | 91 | W 6 mph | Dry |
| 2008 | Apr 27 | 54° / 46° | 100 | 60° / 49° | 109 | Calm | Dry |
| 2007 | Apr 29 | 49° / 48° | 97 | 51° / 47° | 98 | Calm | Dry |
| 2006 | Apr 30 | 50° / 50° | 100 | – | – | ESE 5 mph | Dry |
| 2005 | Apr 24 | 52° / 44° | 96 | 58° / 48° | 106 | SE 6 mph | Dry |
| 2004 | Apr 25 | 54° / 46° | 100 | 69° / 50° | 119 | Calm | Dry |
| 2003 | Apr 27 | 48° / 37° | 85 | 55° / 39° | 94 | S 6 mph | Dry |
| 2002 | Apr 28 | 42° / 38° | 80 | 53° / 43° | 96 | E 8 mph | Dry |
| 2001 | Apr 29 | 47° / 43° | 90 | 56° / 45° | 101 | S 5 mph | Dry |
| 2000 | Apr 30 | 46° / 43° | 89 | 57° / 48° | 105 | ESE 6 mph | Dry |
Readings from the Monterey Regional Airport ASOS weather station (NOAA/FAA, via the Iowa Environmental Mesonet), the observation nearest each hour. Scores above 100 call for a pace adjustment. Rain is the total the station measured in the 5 hours after 6:45am. Download every hour as a CSV.
Add the air temperature to the dew point, both in Fahrenheit. That combined score is closer to what your body feels than the temperature alone, because dew point decides whether your sweat can evaporate, and evaporating sweat is how you shed heat at race pace. The bands below are the same ones my heat pace calculator uses, and that page has the full chart and the physiology behind it.
The bands are a coach's rule of thumb, not a lab measurement. Treat each range as a starting point and let effort make the final call.
A forecast adjusts a pace. It doesn't know your training, how you handle heat, or how your last long run went. I write every plan by hand and set race-week pacing with each athlete. It starts with a free 20-minute call.
Book a free intro callCourse guides, mile by mile: Twin Cities Marathon, Chicago Marathon, Columbus Marathon, Detroit Marathon, Marine Corps Marathon, NYC Marathon, Philadelphia Marathon, California International Marathon, Honolulu Marathon, Houston Marathon, LA Marathon, Jersey City Marathon, Boston Marathon, Rock 'n' Roll Nashville Marathon, Eugene Marathon, Flying Pig Marathon, Pittsburgh Marathon, OC Marathon, Colfax Marathon, Rock 'n' Roll San Diego Marathon, Grandma's Marathon, San Francisco Marathon. All race-day weather pages.
RunFitCoach is not affiliated with the Big Sur International Marathon or its organizers. Observations from the Monterey Regional Airport ASOS station (NOAA/FAA) via the Iowa Environmental Mesonet. Data updated Saturday, October 17, 2026.
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