Current Atlas: Juan de Fuca Strait to Strait of Georgia
Canadian Hydrographic Service Publication. Indispensable guide to tidal currents for the Strait of Juan de Fuca, San Juan Islands, Gulf Islands, & Strait of Georgia. This book gives you a graphical representation of the currents for each hour of the tide cycle. The Current Atlas can be used year after year but you need to purchase an annual Wagoneers Table (formerly known as Washburn's Tables)
Wagoner's Tables make it simple to find what page of the "Current Atlas" to turn to for each hour of the day -- any day that year.