Mission Bay’s Weather is BETTER than Advertised When it comes to coastal paradise, Mission Bay, San Diego, CA, is a gem that surpasses expectations. Contrary to many unpredictable coastal climates, the weather here is consistently, reliably, perfect, making it an ideal destination all year round. Annual Weather Averages: Mission Bay boasts an enviable annual weather […] The post Mission Bay’s weather is absolutely perfect appeared first on Discover Mission Bay.