The best time to visit Seabrook, New Hampshire, is during the summer months, from June to August, when the weather is ideal for coastal activities.During this period, you'll find warm temperatures superb for enjoying the beaches, such as Seabrook Beach, and engaging in water sports. The town comes alive with various outdoor events and dining options, making it a lively and convenient time to visit. This is particularly good for families looking for a classic beach holiday experience, with plenty of sunshine and activities to keep everyone entertained.For couples seeking a more relaxed yet still pleasant experience, the shoulder months of May and September offer a good alternative. The weather is still mild enough for walks along the coast and exploring the local area comfortably, but with fewer crowds than the peak summer season.