Weather Advisory for the 2019 Boston Marathon


The early forecasts for the 123rd Boston Marathon on April 15 are showing the potential for persistent rain, wind, and cooler temperatures.

PLEASE NOTE: On Friday, the B.A.A. announced that Wave 4 participants will start immediately following the conclusion of Wave 3. There will no longer be a 25 minute gap between waves. Please stick to current transportation schedules and seeding assignments. Those in Waves 3 and 4 will still be seeded according to bib number.

As we know, New England weather can change from day to day. Below are race tips that will help you run efficiently, maintain a healthy body temperature, and keep yourself safe. 

Running in every type of weather presents its own challenges. Cold weather running is no exception. Below, we offer some guidelines to help you run efficiently, to maintain a healthy body temperature, and keep yourself safe.


Proper attire is vital to successful cold weather running. Wear the proper amount of clothing. Too little clothing is risky, while too much clothing is cumbersome.

While running, please have your bib number on your outer-most layer, and on the front of your torso. Your race bib has important information printed on both sides, and timing technology attached to it. Therefore, it must be clearly displayed on the front of your torso during the race. 


Dress in layers and avoid bulky outer clothing. The innermost layer should be thin, comfortable and fairly tight fitting. Several thin layers trap the warm air and work better at keeping us warm than one thick cover. The outer layer should be waterproof and wind resistant. Please remember that you need to present your bib number to board the busses to Hopkinton, so please be prepared to make it visible. 

While you are in the Athletes' Village in Hopkinton, warm sweatpants, a sweatshirt or jacket, along with a hat and waterproof gloves will make your wait warmer and more comfortable. Given the current conditions, the fields at the Athletes Village will be wet. You may decide to wear an older pair of running shoes, or plastic bags over your shoes, then discard them before heading to the start.

Remember, if you are planning to bring a plastic bag that can be used as a poncho, please make sure it is clear to assist with our normal security measures.


Please have your bib number on your outer-most layer. 

While running, keep using waterproof gloves and cover your head with a waterproof hat. Heat escapes through uncovered body parts – especially your head. Wearing long sleeves, waterproof gloves and a rain resistant hat can reduce heat loss.
In cold weather, it is easy to overlook your fluid needs. Your body is still sweating, so replenish your fluids appropriately. The rule of thumb during exercise is to drink when you feel thirsty and by taking no more than one cup (8 ounces) of fluid every 20 minutes. While racing in the cold, slow down a bit more than usual at drink stations to avoid spilling liquid on your gloves. 


Please make a plan before race day and develop an exit plan with your family or support team. Having this exit plan is a must in preventing post-race hypothermia. The area around Copley Square and Boston Common can become windy and colder than what you may experience on the course - especially if there is a sea breeze. 
Once you have received your medal, water, and food, find a way to stay warm - a change of clothing and using the Boston Marathon HeatSheet product is a great start. 
Remember, developing this post-race exit strategy is equally important for your support staff. They have been waiting for you to finish in the cold and rain, and they will need to find a warm dry place as well. By taking this post-race approach you will help maintain your body core temperature and help prevent hypothermia.