As a general rule, the areas of the bay that are not regulated by a speed zone are to be navigated at a safe and prudent speed with regards to Inland Rule 6 of the U.S. Coast Guard.

South San Diego Bay is governed by a 5 mph speed limit. This is the area delineated by concrete pylons and posted with 5 mph signs.

All lagoons are posted as 5 mph zones. These include the Shelter Island Yacht Basin, the America's Cup Harbor, Harbor Island West and East Lagoons, and Glorietta Bay.

Areas near anchorages are also 5 mph.

Per California Law (655.2 Harbors and Navigation Code) you must follow the 5 mph limit:

• Within 100 feet of swimmers.
• Within 200 feet of:
• A beach frequented by swimmers.
• A swimming float, diving platform, or lifeline.
• A way or float that boats are tied to for passenger loading/unloading.

For more information visit - http://www.portofsandiego.org/sandiego_sdhp/boating_info_page/boating_rules_page/speed_page/