Mahi-mahi fishing out of Hyannis happens on offshore tuna trips to the canyons. It is not a separate fishery. This brief is for the owner-operator running a boat out of Cape Cod. It covers where boats run, the named grounds near port, how mahi are caught locally, who lists them, and where to check rules and conditions.
When Mahi Turn Up Out of Hyannis
For timing across the region, see mahi timing across the Northeast (see also the Atlantic Northeast offshore fishing guide). This page covers only what is specific to Hyannis.
No Separate Mahi Season
Hyannis has no separate mahi season. Mahi come up on the same offshore tuna trips, so if you are planning around mahi alone, plan around the tuna run.
Where Hyannis Boats Run for Mahi
Hyannis boats run to the offshore canyons for tuna and mahi. The named grounds below sit between port and the canyons. Put each on your chart before the run.
- Nantucket Shoals
- Phelps Bank
- Davis Bank
- Middle Rip
- Asia Rip
- Fishing Rip
The Offshore Canyons
The canyons are the destination. Tuna trips go there, and mahi come up on those same trips.
Nantucket Shoals
Charted water on Nantucket Shoals gets as thin as 3 ft, so the shoals shape how you lay out a run to the canyons.
Phelps Bank and Davis Bank
Phelps Bank and Davis Bank are both named grounds near Hyannis. Davis Bank is named with the Nantucket Shoals complex.
Middle Rip, Asia Rip and Fishing Rip
Middle Rip, Asia Rip and Fishing Rip are named with Nantucket Shoals. Mark all three on your chart before you leave the dock. Chart layers are not for navigation.
Reading Buoy 44020
The nearest buoy is NDBC station 44020 data, in Nantucket Sound at 41.497 N 70.283 W. It reads one point in the sound and says nothing about the canyons. Use its wind, wave height and period for your departure leg, and check the official marine forecast before the run.
How Mahi Are Fished From Hyannis
Mahi are caught on the same trips that target tuna. For the wider picture, start with the guide to offshore gamefish. The species guide on trolling and weedline technique has the detail this page leaves out.
Two trip types produce mahi out of Hyannis:
- Day trolling trips run alongside the tuna effort.
- Night bait and jigging trips also put mahi on the deck.
Day Trolling Trips
Mahi are caught on day trolling trips alongside the tuna.
Night Bait and Jigging Trips
Mahi are also caught on night bait and jigging trips. Neither trip type is singled out for mahi.
Who Fishes for Mahi Out of Hyannis
| Operator | Boats listing mahi-mahi |
|---|---|
| Helen H Offshore Fishing (Helen H Fleet) | John and Son I, John and Son II |
Helen H Offshore Fishing
The Helen H Offshore Fishing fleet lists mahi-mahi, also called dolphin, on John and Son I and John and Son II. If you want to see these grounds from the deck before running your own boat, this is the local operator to look at.
FAQ: Mahi-Mahi Fishing Out of Hyannis
Is there a mahi season out of Hyannis?
No. Mahi-mahi fishing out of Hyannis has no separate season. Mahi come up on the same offshore tuna trips.
Where do Hyannis boats go for mahi?
Boats run to the offshore canyons. The run passes Nantucket Shoals and the named banks and rips, including Phelps Bank, Davis Bank, Middle Rip, Asia Rip and Fishing Rip.
Are mahi targeted separately from tuna?
No. They come on the same day trolling and night bait and jigging trips as the tuna. Neither method is singled out for mahi.
Which Hyannis charters list mahi-mahi?
Helen H Offshore Fishing lists mahi-mahi on John and Son I and John and Son II.
Where should I check conditions before the run?
Read NDBC 44020 in Nantucket Sound and the official marine forecast. The buoy reads the sound, not the canyons, so use its numbers for departure-leg conditions only.
