If you're visiting Seattle, then the best time to go is between September and October. Summer is obviously the high season, and winters can be cold. For those seeking unobstructed vistas of Seattle's skyline, the encompassing mountains, and the expanse of Puget Sound in the gentle daylight, it is advisable to plan your visit to the Space Needle during the daytime. The attraction usually commences its operations in the morning, typically around 9 or 10 AM, affording you the opportunity to absorb the picturesque panorama under abundant natural illumination.