The first day of the 2025 Open Championship is expected to be rainy, with periods of heavy rain that could accumulate up to a quarter of an inch. The high temperature is expected to be around 69 degrees, with a low of 57 degrees, and winds will range from 10 to 20 miles per hour, according to The Weather Channel.

Here’s the projected weather forecast for the 2025 Open Championship, which begins on Thursday morning at Royal Portrush in County Antrim, Northern Ireland. The tournament gets going at 6:35 a.m. local time (1:35 a.m. ET), and it’s dicey whether we will get the full round of play in due to thunderstorms.

Let's take a look at the weather forecast for the 2025 Open Championship. Thursday will be the windiest day of the week, according to forecasters, who are calling for cloudy conditions with winds at 15-25 mph from the southeast. Expect temperatures in the upper 60s and rain showers for most of the day.