Hillsborough River

Last Updated: April 14, 2026

Total streamflow across the Hillsborough River was last observed at 217 cfs, and is expected to yield approximately 430 acre-ft of water today; about 73% of normal. Average streamflow for this time of year is 295 cfs, with recent peaks last observed on 2017-09-15 when daily discharge volume was observed at 16,270 cfs.

Maximum discharge along the river is currently at the Hillsborough R At Morris Br Near Thonotosassa Fl reporting a streamflow rate of 75.3 cfs. However, the streamgauge with the highest stage along the river is the Hillsborough R Ab Crystal Spr Near Zephyrhills Fl with a gauge stage of 51.93 ft. This river is monitored from 5 different streamgauging stations along the Hillsborough River, the highest being situated at an altitude of 118 ft, the Hillsborough R Ab Crystal Spr Near Zephyrhills Fl.

The Hillsborough River is a 54-mile long river in western Florida that flows from the Green Swamp to Hillsborough Bay in Tampa.


15-Day Long Term Forecast


River Details

Last Updated 2026-04-14
Discharge Volume 430 ACRE-FT
Streamflow 216.8 cfs
Past 24 Hours: -5.4 cfs (-2.43%)
Percent of Normal 73.46%
Maximum 16,270.0 cfs
2017-09-15
Seasonal Avg 295 cfs
       
River Streamflow Levels
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Hillsborough R Ab Crystal Spr Near Zephyrhills Fl
USGS 02301990
13 cfs 51.93 ft -2.31
Hillsborough R Bl Crystal Spr Near Zephyrhills Fl
USGS 02302010
55 cfs 49.28 ft -1.25
Hillsborough River Near Zephyrhills Fl
USGS 02303000
74 cfs 0.96 ft -4.16
Hillsborough R At Morris Br Near Thonotosassa Fl
USGS 02303330
75 cfs 23.83 ft -2.86
Hillsborough River Near Tampa Fl
USGS 02304500
0 cfs 20.77 ft None
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile

The Hillsborough River is a river located in the state of Florida in the United States. It arises in the Green Swamp near the juncture of Hillsborough, Pasco and Polk counties, and flows 60 miles (97 km) through Pasco and Hillsborough Counties to an outlet in the city of Tampa on Tampa Bay. It includes 4 nature trails extending for over seven miles, making it perfect for hikers. The name Hillsborough River first appeared on a British map in 1769. At the time, the Earl of Hillsborough was the British Secretary of State for the Colonies, and thus controlled the pensions of the surveyors working in the American colonies, which included East Florida.