 The California Delta waterways are comprised of fresh water, but the waterways depths are controlled by tidal action from the Pacific Ocean. There are approximately two high tides and two low tides every day. The difference between the high and low tides can be six feet and more. A boat that might be comfortably anchored at high tide, can find itself hard aground at low tide. Water depths also can change the vertical clearance at drawbridges and fixed bridges. Anglers also conclude that fishing often is at its best at tide changes. Below are several links to help you to find tidal information.
| California Department of Water Resources Tides |
| Tides On Line |
| |
| Clarksburg #4, Sacramento River |
| Georgiana Slough entrance, Mokelumne River |
| Snodgrass Slough, Sacramento River |
| Suisun City, Suisun Slough, Suisun Bay |
| Montezuma Slough E end nr Brg, Suisun Bay |
| New Hope Bridge #4, San Joaquin River |
| Steamboat Slough, Snug Harbor Marina, Sacramento River |
| Rio Vista, Sacramento River (1) |
| Rio Vista, Sacramento River (2) |
| Terminous, South Fork, Mokelumne River |
| Threemile Slough, Sacramento River (1) |
| Threemile Slough Entrance, San Joaquin River (2) |
| Collinsville, Sacramento River |
| Sherman Island (East) |
| Wards Island, Little Connection Slough, San Joaquin River |
| False River, San Joaquin River |
| Bishop Cut, Disappointment Slough, San Joaquin River |
| Pittsburg, New York Slough, Suisun Bay |
| Antioch Pt .3 mi E, San Joaquin River |
| Antioch, San Joaquin River |
| West Island Lt .5 mi SE, San Joaquin River |
| Holt, Whiskey Slough, San Joaquin River |
| Orwood, Old River, San Joaquin River |
| Grant Line Canal (drawbridge), Old River |
| Irish Landing, Sand Mound Slough, San Joaquin River |
| Prisoners Point, San Joaquin River |
|
