Hillsborough River above Crystal Spr near Zephyrhills FL Water Level Today

NWS river forecast

Forecast from the NOAA National Water Prediction Service. Issued a few times a day and only while a forecast is active. Not for navigation.

Last 30 days

About this gauge

USGS gauge 02301990 sits on the Hillsborough River and reads everything draining 82 square miles of the Hillsborough basin. Its datum sits 1 feet below sea level NAVD88. Daily flow has been on record here since 1990, 36 years of it.

Where this gauge sits in the drainage

No gauged site sits above this one on the mainstem, so this is the first published reading on the river. Downstream the next reading comes from Hillsborough River at Morris Br near Thonotosassa FL at 375 square miles, so what passes this gauge is about 22% of the water measured there. Water passing here goes on to Hillsborough River near Tampa FL, Hillsborough River at Fowler Av near Temple Terrace FL and Hillsborough River at I-275 Bridge at Sulphur Springs FL.

Normal flows here

The Hillsborough River runs a median of 21 cfs at this gauge across 36 years of record. September is the fullest month at a median 57 cfs, and May the leanest at 12 cfs. The highest daily mean on record is 4,790 cfs in 2025, and the lowest is 3.4 cfs in 1991.

Medians from the USGS daily-statistics record, 1990 to 2026. A month at 100% is running at its own long-term median.