What is the Oceanside Ironman Competition? The 2025 Ironman 70.3 Oceanside takes place on April 5, 2025. Conditions are ocean swimming, rolling bike paths, and rolling running. Average air temperature is 66 degrees and average water temperature is 61 degrees. Last year the competition was called off due to the pandemic, so we are sure the athletes are excited and ready to go for the event this year! What are...