Westamerica Bank ← View details 200 Washington Street, Petaluma, CA 94952 +1 707-769-5500 westamerica.com Suggest an Edit Name* State* Locality* ZIP* Street address* Phone* Website Opening hours Monday: 09:00 am — 04:00 pm Tuesday: 09:00 am — 04:00 pm Wednesday: 09:00 am — 04:00 pm Thursday: 09:00 am — 04:00 pm Friday: 09:00 am — 06:00 pm Your comments * — Required information