October half term works well in Poole because the weather matters less than it does in August.
Family programming
Half-term and Halloween activities run at Poole Museum, the parks and Lighthouse. See family fun and school holidays.
Outdoors
Autumn colour on the heath and at Upton Country Park, and a sea that is still surprisingly warm even if the lifeguards have gone. See beach safety before swimming out of season.
Nearby
Corfe Castle and the Purbecks make a strong half-term day: see Dorset and countryside.
If it rains
See wet weather fun.
Check October events for current dates.