Nassau River at US-17 (in MHHW)

Highest listed crest 1.49 ftFlood stage 1.3 ft1 crests since 2026

The Nassau River at US-17 (in MHHW) crested above flood stage 1 time among the 1 crests the National Weather Service lists from 2026 to 2026. The highest, 1.49 ft on October 10, 2026, was minor flooding, 0.19 feet above flood stage. 1 other gauge on the Nassau River crested above flood stage within a week of it.

The gauge

Highest listed crest: 1.49 ft; October 10, 2026
Flood stage: 1.3 ft; Major flooding from 3.3 ft
Crests at major: 0; 1 above flood stage
Most recent flood crest: October 10, 2026; 1.49 ft, minor flooding
Location: Nassau County; Near Fernandina Beach (11.0 mi), St. Marys (12.7 mi)
Identifiers: NWS NRHF1; No USGS station

Flood stages

The thresholds the National Weather Service uses for this gauge today, and how many listed crests reached each.

Flood categories, Nassau River at US-17 (in MHHW)

Action stage	0.8	0	—	The level at which the NWS or its partners begin to take action
Flood stage (minor)	1.3	1	Oct 10, 2026	Minimal or no property damage, but possibly some public threat
Moderate flood stage	2.3	0	—	Some inundation of structures and roads near the stream
Major flood stage	3.3	0	—	Extensive inundation of structures and roads

Every listed crest

1 crests from 2026 to 2026. Filled: at or above flood stage. Hover a crest for its date and stage.

These are the crests the local National Weather Service office lists for the gauge: the highest on record and recent crests. Lesser floods between them may be missing, so counts by decade are a floor.
Categories use today's flood stages. Levees, dams and channel changes since a crest can make old and new stages not directly comparable.

Highest crests

Highest listed crests, Nassau River at US-17 (in MHHW)

1	Oct 10, 2026	1.49	+0.19	Minor	—

The worst floods along the Nassau River

For this gauge's highest crests, the other gauges on the Nassau River that crested above flood stage within a week.

October 10, 2026: 1.49 ft here, minor flooding

Tisonia (in MHHW)FL · Oct 9, 2026 · 1.61 ft · Minor

Gauges on the Nassau River

Flood gauges sharing the river's name, linked within 80 miles of one another.

Flood gauges on the Nassau River

US-17 (in MHHW) this gauge	FL	1.3	1.49 ft, Oct 10, 2026	0
Tisonia (in MHHW)	FL	1.3	4.52 ft, Sep 11, 2017	2

Other gauges in Nassau County

Flood gauges in Nassau County

Amelia River Public Boat Ramp (in MHHW)	2.0	2.65 ft, Oct 10, 2025	0
Atlantic Coast at Fernandina Beach (in MHHW)	2.0	6.94 ft, Oct 1, 1898	6
Kings Ferry (in MHHW)	1.0	1.51 ft, Oct 10, 2026	0
Interstate 95 (in MHHW)	1.0	2.79 ft, Oct 7, 2016	0
Thomas Creek (in NAVD88)	3.5	4.40 ft, Oct 11, 2026	0

Nassau County: every hazard · River floods across the country · Florida

NOAA National Water Prediction Service, gauge NRHF1, retrieved October 30, 2026. Stages in feet on the gauge's own datum, not elevation. Crests are as the National Weather Service lists them; preliminary values may be revised.