White Marlin water temperature at Block Island Canyon Complex.
Typical May SST in Block Island Canyon Complex is 52–60°F. White Marlin prefer 70–82°F with peak activity in 73–79°F.
White Marlin SST threshold
Year-round overlap with Block Island Canyon Complex SST
Where the Block Island Canyon Complex typical monthly SST band overlaps with white marlin's preferred and optimal ranges, the species is in range.
| Month | Zone SST | Status |
|---|---|---|
| Jan | 42–48°F | Outside |
| Feb | 42–48°F | Outside |
| Mar | 44–50°F | Outside |
| Apr | 46–54°F | Outside |
| Maynow | 52–60°F | Outside |
| Jun | 60–68°F | Outside |
| Jul | 65–75°F | Peak |
| Aug | 68–78°F | Peak |
| Sep | 64–72°F | Fishable |
| Oct | 56–64°F | Outside |
| Nov | 50–58°F | Outside |
| Dec | 44–52°F | Outside |
August
White marlin fishing is sight fishing at the surface — pitch baits to fish coming up on a teaser. Find them on the warm side of a 2–3°F break in 73–79°F water. Mid-Atlantic canyon mornings in August are the iconic bite.
These ranges are climatological norms. Actual SST varies year over year — get an SST satellite shot the day before you run.
Live SST imagery for Block Island Canyon Complex.
Bield: Fish overlays current NOAA CoastWatch SST onto your chartplotter view and alerts you when Block Island Canyon Complex hits white marlin's optimal 73–79°F window.