BirdTrout

Smith River, Virginia

17.7 mapped river miles, draining 378 square miles, in the Roanoke basin watershed. 3 USGS gauges report water temperature on it, and this page reads all 3.

Open in BirdTrout
Map key
Public land — where the bank is open to walk and fish
USGS gauge — live water temperature
Water temperature — the colour of the river, and of every dot on it

50°F and colder is cold, through cold-transitional and cool, to warm above 70°F — the same four bands, breaking at 58, 64 and 70°F, that the app paints. Grey is water nobody has measured.

Water temperature right now

Live from the USGS — every pill above is live, so the numbers you are reading are the latest continuous readings at each gauge. Provisional and unreviewed, as all real-time data is. If that fetch cannot happen — you are offline, or the USGS is down — the pills fall back to the last value we cached, 30 September 2026, 13:48 UTC.

44.6 °F
Philpott
RM 0.0 · 137 cfs · read 30 Sep, 9:25 am ET
Cold
46.0 °F
Bassett
RM 0.0 · 139 cfs · read 30 Sep, 9:25 am ET
Cold
59.2 °F
Martinsville
RM 0.0 · 139 cfs · read 30 Sep, 8:45 am ET
Cold-transitional

Thermal classification

This is inferred, not measured. Virginia DWR does not publish a temperature classification for this water. What it publishes is a management tier — whether the trout in it are wild, hold over through summer, or are stocked and fished out — and the bands below are read off that tier, because a stream that sustains wild trout is a cold stream and one that does not hold fish past July is not. It is the agency's judgement of the fishery translated into the four bands this site paints everywhere else; it is not a thermometer, and where the two disagree the thermometer is right.

Each gauge carries a July mean built from its own daily record — 8 Julys, 2019–2026, measured rather than modelled. A July mean is what decides which of the four bands a stretch of water belongs to, because July is when a trout river either holds or does not.

Reach July mean Band Groundwater
Philpott
RM 17.7–0.0
49.9 °F cold high
Bassett
RM -24.2–0.0
56.0 °F cold high
Martinsville
RM -32.8–0.0
49.9 °F cold high

Every gauge sits at the bottom of its segment, so each number is the warm end and the water above it runs colder. ±1.99 °F on the fit.

Questions about this river

Virginia DWR classification

Virginia DWR classifies this water as Class II, Class III, and Class V. More than one class appears because the classification changes along the river. The thermal bar above shows where. The management tier on those reaches is stocked holdover, wild. This is a designation of the fishery, not the season and creel rules — those change yearly and live with the agency.

Species Virginia DWR records in this water: brook trout, brown trout, rainbow trout. Recorded per classified reach, so it covers the classified water rather than the whole stream.

VDWR trout waters and stocking →

Fishable reaches

River miles are measured above the mouth, along the mapped mainstem. The reach breaks are the gauges, which is also how the temperature model divides the river.

Reach Miles July mean Access on it
RM 17.7–0.0
down to Philpott
42.0 49.9 °F —
RM -24.2–0.0
down to Bassett
8.6 56.0 °F —
RM -32.8–0.0
down to Martinsville
32.2 49.9 °F —

0 mapped access sites on the mainstem: 0 walk-in, 0 boat or canoe launches.

USGS gauges

Every gauge on the mainstem, upstream first. Links go to the USGS monitoring-location page for the site.

Species

Virginia DWR manages this water for brook trout, brown trout, rainbow trout. That is the state's designation rather than a survey: no fish survey or stocking record for this water is in the files this site reads.

Historical July mean

The measured record behind every temperature band on this page: the mean of the daily means for July, at each gauge, over the years USGS has one.

Gauge July mean July range Julys
Philpott 49.9 °F 17.2 °F 8
Bassett 56.0 °F 20.8 °F 7
Martinsville 49.9 °F 17.2 °F 8

Hatches on this water

56 insects are recorded from the Virginia mountains, which is the region this river sits in. That is a claim about the region and not a survey of this stream: nobody has recorded which of them has been caught here. Open the river in the app and the hatch panel will narrow it to the ones whose temperature window today's reading is inside.

InsectPeakWaterSize
Little Black Stonefly
Allocapnia / Capnia spp.
January–April 34–46°F #16–18
Little Brown Stonefly
Taeniopteryx / Strophopteryx spp.
February–April 38–50°F #12–16
Blue-Winged Olive
Baetis spp.
March–May and September–November 38–58°F #16–22
Quill Gordon
Epeorus pleuralis
March–April 42–52°F #12–14
Blackfly
Simulium spp.
April–June 40–65°F #18–22
Blue Quill
Paraleptophlebia adoptiva
April–May 44–56°F #16–18
Cranefly
Tipula spp.
April–June and September–October 40–65°F #6–10
Grannom
Brachycentrus spp.
April–May 48–58°F #14–16
Green Rock Worm / Green Weenie
Rhyacophila spp.
April–June and September–October 45–68°F #10–14
Hendrickson
Ephemerella subvaria
April–May 45–58°F #12–14
Little Black Caddis
Chimarra atterima
April–May 46–58°F #16–20
Alderfly
Sialis spp.
May–June 52–66°F #10–14
Caterpillar
Lepidoptera larvae
May–September 55–75°F #8–14
Crayfish
Orconectes spp.
May–October 55–78°F #4–8

And 42 more — the year-round records, mostly: midges, scuds and sculpins, which are in the water every day and are therefore never the news.

Tributaries and watershed

7 named streams meet this one. Confluence miles are above the mouth; the longest twelve are listed.

Smith River sits in HUC 8 03010101 and 03010103, the Roanoke basin, and drains 378 square miles, Strahler order 6 at the mouth. 134 NHD reaches carry the name for 55.5 miles in total — more than the 17.7 miles of drawn mainstem, because NHD counts side channels and braids as their own reaches.

Other water nearby

The closest 6 rivers on this site, straight-line from the middle of this one — not drive time.