September in Prince Edward Island typically offers a transition from summer to autumn. Visitors and residents can expect milder temperatures compared to the peak summer months, with average highs ranging from 17C to 20C (63F to 68F) and lows dipping to between 8C and 11C (46F to 52F). Rainfall averages around 100mm during the month, spread relatively evenly throughout. Ocean temperatures remain relatively warm from the summer heat, creating comfortable conditions for water activities, although cooler air temperatures may necessitate wetsuits.
This period presents an ideal opportunity to experience the Island’s natural beauty with fewer crowds than the peak tourist season. The changing foliage begins to display vibrant autumn hues, creating a picturesque landscape for scenic drives, hikes, and cycling. The pleasant weather conditions are also suitable for golfing, deep-sea fishing, and exploring the province’s charming towns and historic sites. Historically, September marked the beginning of the harvest season, a tradition that continues to be celebrated through various festivals and events showcasing local produce and culinary delights.