San Francisco County · Fisherman's Wharf
Aquatic Park
Protected Cove · Open Water Swimming · Tidal Current Risk Past Breakwater
Tidal Data
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⚠ Data may be stale — showing last known reading. Conditions may have changed.
Current Speed
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knots
Tide Direction
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at Gate
Water Temp
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°F
NOAA Tidal Currents · Golden Gate (SFB1203)
Long-period swell is dangerous. Any swell period above 15 seconds means waves are arriving in sets with long quiet intervals — sometimes 20 minutes of calm. During the quiet, energy is building offshore. People who walk to the water's edge during the lull are swept in when a set arrives.
Known Hazards
Tidal Currents Past the Breakwater
Aquatic Park cove is protected and popular with open water swimmers. But the moment you swim past the breakwater, you enter the full force of Golden Gate tidal currents — up to 4–5 knots on strong tides. Swimmers have been swept out and unable to return. The current data above shows live conditions at the Gate. On outgoing tide, stay inside the breakwater.
Source: NPS San Francisco Maritime — Aquatic Park Cove (nps.gov/safr); Golden Gate Triathlon Club open water safety guide (ggtc.org)
Cold Water Incapacitation
Bay water is cold year round. Even strong, experienced swimmers have been affected by cold water in Aquatic Park. Enter the water slowly. Never swim alone. Know the signs: gasping, inability to control breathing, sudden muscle cramping.
Source: NPS San Francisco Maritime — Aquatic Park Cove (nps.gov/safr); NPS GGNRA Beach Safety (nps.gov/goga)
Boat Traffic & Visibility
Aquatic Park has active ferry and recreational boat traffic nearby. In fog — common in summer — swimmers outside the cove are extremely difficult to see from boats.
Source: NPS San Francisco Maritime — Aquatic Park Cove (nps.gov/safr); Pacific Open Water Swim Co. safety guide (pacificswim.co)
Deceptive Calm
The cove looks inviting and safe. This is exactly what makes it dangerous for swimmers who venture past the protected area without understanding the current conditions outside.
Source: NPS San Francisco Maritime — Aquatic Park Cove (nps.gov/safr); Golden Gate Triathlon Club safety guide (ggtc.org)
Before You Enter the Water
01
Check the tide before you swim. Outgoing tides push water hard through the Golden Gate. Swimming against a 3-4 knot current is impossible for most people. Always swim on an incoming or slack tide.
02
Stay inside the breakwater. The Aquatic Park cove is protected. The moment you swim past the breakwater you enter open bay current. Many swimmers have been swept out and could not return.
03
Never swim alone. Cold water incapacitation can happen fast. Always have someone watching from shore who knows where you are.
04
Know the signs of cold shock. Hypothermia can set in quickly. Enter slowly and acclimate before swimming.
05
Watch for boat traffic. In fog or low visibility, boat traffic in the bay is a serious hazard for swimmers who venture outside the protected cove.
06
If swept out: float, signal, conserve. Do not fight the current. Float on your back, signal for help, and wait for rescue. The current will not pull you under — it will carry you. Stay calm.
Ocean Emergency
911GGNRA Dispatch · (415) 561-5505
USCG San Francisco · (415) 399-3547