Mission Bay is one of the most accessible cruising grounds in Southern California. At 4,235 acres it is the largest aquatic park in the United States, carved into the coastline just north of Ocean Beach — on a calm Saturday you can be at anchor off Fiesta Island less than an hour after leaving the dock. It is also one of the most regulated bodies of water in the state: speed zones shift at 11 a.m., anchoring rules change after dark, and water quality advisories go up fast after rain.
Speed rules on Mission Bay are not a single blanket limit. The bay is divided into four major activity zones, and limits vary by location, time of day, and season. Getting this wrong is one of the most common reasons boaters get stopped by San Diego Lifeguard Services.
| Situation | Limit |
|---|---|
| Sunset to sunrise | 5 mph throughout the entire bay |
| Within 100 ft of shore | 5 mph |
| Within 100 ft of another vessel | 5 mph |
| Within 100 ft of a swimmer or surfer | 5 mph |
| Within 200 ft of a beach frequented by swimmers | 5 mph |
| Near bridges and in marina areas | No-wake (steerage way only) |
East Mission Bay, including the open water near Ski Beach and De Anza Cove, is an open-speed zone from sunrise to sunset. Posted buoys and signs define the exact boundaries.
West Mission Bay, all narrow channels, and coves are controlled-speed areas regardless of time of day. Read the posted buoys and signs on the water, not just a map — zones can shift seasonally and events can change access. When in doubt, slow down.
During daylight you can anchor almost anywhere in the bay, except:
The east side of Fiesta Island and the waters off Crown Point are popular lunch-hook spots. The north end near De Anza Cove is another option when the wind picks up from the west.
According to the City of San Diego, overnight anchoring is only permitted in Mariners Basin, limited to 72 hours in any seven-day period, and an adult must remain aboard. Long-term moorings are available for a fee through the Lifeguard Services Division. Otherwise, call ahead to a marina for a guest slip.
The south shore of Fiesta Island and parts of Crown Point are popular weekend beaching spots — get there early on a summer Saturday.
After rain, urban runoff flows through Rose Creek, Tecolote Creek, and dozens of storm drains directly into the bay, spreading elevated metals, nutrients, and fecal bacteria. San Diego Coastkeeper monitoring has found waterways feeding Mission Bay exceeding recreational safety standards at some locations even in dry weather.
Advisories can be site-specific — for example, Campland on the Bay or Fanuel Park may be posted while the rest of the bay is fine. If it rained in the last three days, check before you go.
California requires a Boater Card for anyone operating a motorized vessel on state waters; as of 2025 the requirement applies to all ages. It is a lifetime card with a one-time $10 fee, available through the California Division of Boating and Waterways.
| Age | Restriction |
|---|---|
| Under 12 | Cannot operate any motorized vessel over 15 hp |
| 12–15 | Can operate over 15 hp only with a supervising adult aboard |
| Under 16 | Cannot operate a vessel over 15 hp independently |
| 16 and up | Can operate with a valid California Boater Card |
An ocean run on the way out is also a good chance to check that your system still makes its rated output before a longer passage — see the watermaker pre-departure checklist. If output is down, start with our low-flow troubleshooting guide or the full watermaker troubleshooting guide.
Looking for a bigger trip? Try our Catalina yacht camping guide or San Diego to Ensenada guide.
Planning a longer passage after your bay days? Tell us about your boat and we'll make sure your watermaker is ready before you go.