Beach · Lake Ontario · New York
Southwick Beach State Park
A public beach on Lake Ontario in Jefferson County, New York, 0.71 miles of shore. The state samples the water for bacteria once a week through a 98-day swim season.
The beach
On the record
- Water
- Lake Ontario
- Location
- Jefferson County, New York
- Length
- 0.71 miles
- Owner
- Public
- Access
- Public Access
- Water sampling
- Yes — once a week in the swim season
- Swim season
- 98 days, as reported
- Monitoring tier
- Tier 2 (Tier 1 is highest)
- Water quality standard
- E. coli, single sample: 235 per 100 mL
- EPA beach ID
- NY304236
- Coordinates
- 43.7574° N, 76.2139° W to 43.7673° N, 76.2168° W
As the state reported it to EPA for the 2025 season. Sampling schedules change year to year. How beach monitoring works →
Down the shore
Nearest Ontario beaches
- Henderson Harbor Yacht Club Beach6.6 mi · sampled · NY
- Sandy Island Beach State Park8.8 mi · sampled · NY
- ONTARIO SHORES (Rainbow Shores)9.7 mi · sampled · NY
- Brennan'S Beach12 mi · sampled · NY
- Selkirk Shores State Park Beach14 mi · sampled · NY
- Selkirk Shores State Park Beach - South14 mi · sampled · NY
Straight-line distance.
By boat
Launches nearby
- Henderson state park launch4.8 mi · trailer ramp
- Henderson municipal launch6.2 mi · trailer ramp
- Sandy Creek DEC launch7.4 mi · trailer ramp
- Westcott Beach State Park11 mi · trailer ramp
On the horizon
Lighthouses nearby
- Stony Point Light7.1 mi · deactivated
Ashore
State parks nearby
On shore nearby
Worth the stop
- Sackets Harbor14 mi · town
Off the beach
What to fish on Lake Ontario
Source
Facts on this page are from the EPA BEACON profile for beach NY304236, the record New York files under the federal BEACH Act, retrieved 2026-10-10. The county is placed from the beach’s own coordinates. A blank field means the record is silent. Parking, fees, lifeguards and dog rules are set by whoever runs the beach; check with them before you go.
Chart shoreline generalized from Natural Earth (public domain). Not for navigation. Something wrong or missing? Write to contact@greatamericanlakes.com.