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Voluntary Vessel Speed Reduction Zone In Effect NOAA recommends that vessels > 300 gross registered tons transiting the zone do so at speeds of 10 knots or less

Saturday, July 5th, 2025

The Whale Presence Rating shows a relative assessment of blue, humpback, and fin whale presence in the San Francisco region.

 

Current Whale Presence Rating

Current Rating: Medium
How Was This Calculated?

 

Sightings from 6/30 to 7/5

1 Blue 4 Humpback 0 Fin

 

Acoustic Detections from 6/30 to 7/5

There are no recent acoustic detections

 

*The San Francisco acoustic system is currently offline. Whales may be present even if whale presence rating is low. Please remember you can protect these sensitive species by slowing down.

Map of Sightings and Blue Whale Model

Voluntary Vessel Speed Reduction Zone

The Voluntary Speed Restriction is currently:

Active

For more information, see NOAA’s Vessel Speed Reduction Guidelines.

What is the whale presence rating?

For more information, visit the Whale Safe website.