Galapagos - what is the best season for UW videography?

[wus]

I'm thinking of doing a Galapagos liveaboard cruise to Wolf and Darwin to see - and film - the hammerhead sharks.

From what I read so far, they can be seen year round - but correct me if I got this wrong. I just started reading up on it.

I have only small UW flashguns, and no video lights. Therefore I will mostly have to rely on natural light. So good visibility is very important to get good pictures.

Does visibility change over the seasons, near Wolf and Darwin? When can I expect the best visibility?

 

[DiveTheGalapagos]

Visibility is diminished beginning either late May or early June (traditionally, though things are shifting) until Nov. due to the Humboldt current. Hammerheads have traditionally migrated away from late Feb - April. I would look at Jan or May.

Having said all this, what was standard for years may be shifting with climate change.