Q.SST & Offshore Fishing
What SST should I look for when targeting yellowfin tuna?
A.
Yellowfin tuna prefer 70-78°F water with peak activity around 72-75°F. They concentrate at SST breaks where their preferred range meets cooler or warmer water — these breaks often align with current edges (Gulf Stream, eddies) and are where yellowfin chunk and troll bites stack.
Look for SST breaks of 2-3°F over a short distance, often visible on satellite SST imagery. Pair with structure (canyons, lumps, ledges) for the best high-percentage zones. SST threshold pages cover species ranges.