The best time to visit Brewster is during the shoulder seasons, specifically May, early June, or September, for comfortable weather and fewer crowds.May and early June offer pleasant temperatures, with average highs around 18-22°C, and the spring blooms are beautiful. You'll find that most attractions and restaurants are open, but the beaches and roads are not yet at their peak summer busyness. It's a great time for couples to enjoy quiet walks along the Cape Cod Rail Trail or explore the local art galleries without feeling rushed.September provides a similar experience, with average highs of 20-24°C and the ocean still warm enough for swimming. The summer crowds have thinned out considerably, making it an ideal time for a relaxing getaway. Families with younger children might find this period particularly appealing, as the beaches are less crowded, and the weather is still great for outdoor activities like exploring the tidal flats at Brewster's bayside beaches.While July and August offer the warmest weather and all activities are in full swing, these months are also the busiest and most expensive. If you prefer a bustling atmosphere and don't mind the crowds, then the peak summer is also a good option.