Dagger Island, San Antonio Bay
Dagger Island, located within the vast San Antonio Bay system, is a prime redfish destination known for its expansive, shallow flats and strategic wind breaks.
Texas · United States · Season: Spring through fall
Overview
Dagger Island, located within the vast San Antonio Bay system, is a prime redfish destination known for its expansive, shallow flats and strategic wind breaks. The island itself, along with numerous smaller islands and scattered shell reefs, creates protected pockets and channels that hold fish even on windy days. The bottom varies from hard sand and shell to firmer grass beds, making for generally good wading. Tidal flow from the various passes into San Antonio Bay ensures a consistent supply of bait. Redfish cruise these flats, often tailing in the grass or pushing wakes along the island's edges. Access is by boat, typically from Port O'Connor, which requires a decent run across open bay water. Fall, winter, and spring are most productive. Anglers should be prepared for potential long runs and be adept at spotting fish against a busy backdrop of grass and shell. The rewards are often large fish and less crowded conditions than more accessible spots.
Why it stands out
Expansive shallow flats with varied bottom structure Excellent wind protection behind Dagger Island and smaller islets Opportunities for larger redfish due to less pressure Good tidal influence from San Antonio Bay passes Mix of hard sand, shell, and grass for diverse fishing
Know before you go
Requires a longer boat run from launch points Can be exposed to crosswinds when traversing open bay Oyster shells can be sharp; stout wading boots are essential Navigation can be tricky in low light or fog due to numerous small islands
Planning notes
Where: Texas, United States Best season: Spring through fall Good for: Fly Fishing, Fishing Featured on: Top 10 Fly Fishing Flat Spots for Redfish on the Texas Middle Coast (#8) Access point: San Antonio Bay, Texas, USA Check current permits, closures and fire restrictions with the managing agency before you commit to dates.
Field notes
- Expansive shallow flats with varied bottom structure
- Excellent wind protection behind Dagger Island and smaller islets
- Opportunities for larger redfish due to less pressure
- Good tidal influence from San Antonio Bay passes
- Mix of hard sand, shell, and grass for diverse fishing
Where on earth
Satellite imagery flying in from a world view to Dagger Island, San Antonio Bay, United States.
Coordinates
- Decimal degrees
- 28.3540, -96.7601
- Latitude (DMS)
- 28° 21′ 14.6″ N
- Longitude (DMS)
- 96° 45′ 36.4″ W
Coordinates are an access-point reference for Dagger Island, San Antonio Bay, not a route. Carry a paper map and confirm trailhead or put-in access with the managing agency before you go.

