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Shamrock Marathon ·

What will race morning in Virginia Beach cost you?

Typical race morning150 days to go
3:15:003:15 to 3:19Edit goal

Past starts: 10°C typical, 5 to 15°C since 2021.Live forecast opens 6 March.

RunWeather race plan: goal pace against race-day pace, and how to spend it from start to finish
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01 · The conditions

Race-day weather

150 days to goForecast opens 6 March

Race-day forecasts appear 15 days before the race. Until then, here is what race morning has looked like.

Explore historical weather

Get Virginia Beach race-morning weather on your phone when it opens.

Set up Virginia Beach in the app now: your goal, your start, your pace plan. The race-morning forecast lands in it in race week.

RunWeather race plan: what slows you, heat and wind in minutes, then conditions from gun to finish

02 · Same effort, different day

What the weather may cost your goal

Goal finish time

Choose a popular time or set your own. Your pace and weather preview update as you edit.

Your goal pace4:37/km · 3:15:00 finish
Same effort in this weather3:16:57+1:57 at 07:00 · five-year average

3:15:00 goal. On a typical race morning here, expect about 3:15 to 3:19. Main factor: wind.

  • Heat and sun0%
  • Wind and comfort+1%
  • Weather total+1%

RunWeather’s pace model, one weather hour at your goal effort: weather at 07:00 local using the five-year race-morning average. A planning preview, not a predicted finish. Hills, turns, shelter, fuelling, heat adaptation and wave timing are not modelled here; rain is left out because a probability is not a measured rain rate. Explore the heat pace calculator.

View even-pace checkpoints
DistanceElapsed time
5.0 km0:23:06
10.0 km0:46:13
15.0 km1:09:19
20.0 km1:32:26
25.0 km1:55:32
30.0 km2:18:39
35.0 km2:41:45
40.0 km3:04:51
42.2 km · Finish3:15:00

In the app

Your race plan, on race morning

Add the Shamrock Marathon and the app keeps your plan current until the gun.

  • Goal pace against race-day pace

    What your goal is worth on this morning’s weather, per km and at the finish.

  • How to spend it

    Start, middle and finish, against your average.

  • What slows you

    Heat, wind and hills, each in minutes.

Goal vs race dayWhat slows you
RunWeather race plan: goal pace against race-day pace, and how to spend it from start to finish
RunWeather race plan: what slows you, heat and wind in minutes, then conditions from gun to finish

Reference

Everything else about race morning

Open any row for the full detail.

  • The course42.2 km

    The Shamrock Marathon is a marathon in Virginia Beach, United States. There is no course map here yet. Check the organiser's site for this year's route.

    RACE MORNING AT 07:302021–2025
    5–15°C

    Where most starts fell, in the weather near Virginia Beach around race day. Not a forecast.

    AVERAGE
    10°C
    HUMIDITY
    81%
    WIND
    18 km/h
    No course map yetOrganiser route
    01

    The first start is listed at 07:30 local time. Check the forecast for your own wave or corral start.

    02

    Compare the conditions at your start and expected finish before settling on kit and effort.

    03

    Confirm late changes to the route, start wave and logistics with the organiser.

    Official race site ↗
  • Race-window historyLast 5 years, race date ±5 days

    A range for planning Shamrock Marathon: weather near Virginia Beach on race morning, the last 5 years (2021 to 2025, race date ±5 days). Not a forecast.

    Typical start-hour air10°C10th–90th percentile 5°C–15°C
    Dew point / humidity7°C81% relative humidity
    Start-hour wind18 km/hDirection varies by day
    Hours with rain18%Historical frequency at this hour
    AIR THROUGH THE RUN

    The five-year picture

    10°C → 12°C by +4h
    07:00
    Air temperature
    10°C
    Humidity
    81%
    Wind
    18 km/h
    Hours with rain
    18%
    3°C9°C15°C21°CStartGoal finish07:0009:0011:0013:00

    Hover or drag to explore. Use ← → when focused. Shading: middle 80% of sampled temperatures.

    Five-year average Middle 80% of sampled hours

    The sampled air warms by about 2°C across four hours. Check your expected finish-hour forecast, not just the start.

    WIND CONTEXT

    Where the breeze came from

    NN: 12 of 55 sampled start hours; mean 21 km/hNENE: 8 of 55 sampled start hours; mean 21 km/hEE: 3 of 55 sampled start hours; mean 14 km/hSESE: 5 of 55 sampled start hours; mean 14 km/hSS: 7 of 55 sampled start hours; mean 20 km/hSWSW: 10 of 55 sampled start hours; mean 17 km/hWW: 4 of 55 sampled start hours; mean 13 km/hNWNW: 6 of 55 sampled start hours; mean 19 km/h
    WIND FROMN

    12 of 55 samples · 22%
    Mean 21 km/h

    The petals show how often the wind came from each direction at the sampled start hour. They do not predict the direction on race day.

    A city-point wind rose cannot tell you which parts of the course will be sheltered or exposed. Use the live forecast and the organiser’s route map together.

    Method: 55 ERA5 hourly samples at 07:00 local time, across 11 calendar days per year in 2021–2025. The sample uses the hour containing the advertised first start; waves may start later. Grid weather is modelled reanalysis, not an on-course station reading. Open-Meteo Historical Weather API . Data generated 2026-10-21.

  • Shamrock Marathon FAQs7 questions

    When is the 2027 Shamrock Marathon?

    Shamrock Marathon is listed for 21 March 2027. Confirm the latest details on the official event website before travelling.

    Is the weather shown a forecast for the Shamrock Marathon?

    Only from about 15 days before the race, when the page shows the live race-day forecast. Before that, you see the weather near the city on the mornings around race day in the last 5 years: what is typical, not what will happen. Monthly averages, when shown, cover every hour of the race month.

    What is race morning usually like at the Shamrock Marathon?

    Around the 07:30 start, mornings around race day near Virginia Beach in the last 5 years averaged 10°C, 81% humidity and 18 km/h wind. Most started between 5 and 15°C. This is weather near the city, not a reading from the race itself or a forecast.

    Which recent year had the warmest race morning at the Shamrock Marathon?

    2022. Around race day that year it was about 13°C around the 07:30 start, against 10°C on an average year.

    Which recent year had the windiest race morning at the Shamrock Marathon?

    2024, with about 24 km/h of wind around the 07:30 start. Over the last 5 years the wind here came mostly from the north.

    How should I pace the Shamrock Marathon on a warm day?

    3:15:00 goal. On a typical race morning here, expect about 3:15 to 3:19. Main factor: wind. If race day comes in warmer, start a little easier than goal pace, run by feel to halfway and drink early. Plan my race gives your splits for the day.

    Can past years predict the weather on race day at the Shamrock Marathon?

    No. They show what race morning is usually like, not what this year will bring. Check the live forecast in the last 15 days, look at the hours through your expected finish, and follow the organiser for start and course updates.

  • Sources and race informationOrganiser, weather data, guide reviewed 2026-10-21

    Past race-morning weather: Open-Meteo Historical Weather API, weather near the city from 2021 to 2025, updated 2026-10-21. Not official race-day readings.

    Guide reviewed . RunWeather is an independent guide, not the race organiser. Dates, waves and routes can change; the organiser’s latest instructions take priority.

Virginia Beach race morning, on your phone.

Free on iPhone and Android. Your race plan, updated with the forecast until the gun.

RunWeather race plan: goal pace against race-day pace, and how to spend it from start to finish