Wade68/100
Wading is in play only where your chosen access has clear footing, legal entry, and no forced crossings.
All California reports
Fly fishing report · West
Mattole River at Petrolia
Is Mattole River at Petrolia worth the trip today? Check flow, weather, hatches, access, and rules for California before you go.
See the flow chart ↓Generated artwork: BlueStreamFly · Regional illustration; not the exact location.
Good day to fish?Latest river check
Caution
Maybe. Read the cautions first.
68
No clear best access mode. Wade, Bank / edge, and Float have the same top score. Use current access, footing, weather, and local rules to choose.
Update time and confidence
Live data checkHighHow much of the live flow, weather, and alert data came back.
Today's callMediumWater temperature not verified; do not use this score to clear warm-water risk.
Score calculated Aug 25, 2026, 9:54 AM PDTUsually checks again about every 45 minutes
Access choicesNo clear best mode
Wade, Bank / edge, and Float have the same top score. Use current access, footing, weather, and local rules to choose.
Bank / edge68/100
Bank and edge fishing remains a practical low-commitment option if access is legal and footing is safe.
Float68/100
A float is in play where this report supports boat access and wind, releases, and shuttle logistics are manageable.
Your plan
Today's Mattole River at Petrolia plan.
Mattole River at Petrolia is a North Coast anadromous river where legal status, low-flow rules, and storm timing decide whether a fly day makes sense. Use the live gauge, CDFW low-flow page, and local weather before thinking about flies.
- Check first
- Use RiverReports for a quick chart and 11469000 for official USGS context.
- Try
- Check open status before leaving home, then match the gauge to clarity when you arrive.
- Leave when
- Skip during closures, muddy storm spikes, hot low water, or when access depends on private-land assumptions.
Live river check
What the river is doing
Check the latest flow and weather before you go. A quick change can make the river harder or less safe to fish.
Showing server-checked river conditions while current readings refresh.
- Flow
- 11 cfs
- From the latest stored river check. Open the official source for the newest reading.
- Air now
- 58°F
Current NWS forecast period
- Next 24h high
- 73.0°F
NWS air forecast near
- Rain chance
- 0%
For this forecast period
This is an air forecast, not a river-temperature reading. Check the water with a stream thermometer before fishing in hot weather.
Latest stored weather check
Mostly Cloudy
Mostly Cloudy
- Wind
- 3 mph
- Weather checked
RiverReports preview · current series loading
Recent flow
RiverReports gauge
Showing the available RiverReports chart while the current structured flow series loads. Check the chart on RiverReports Opens in a new tab.
More forecast and source details
National Weather Service
Mattole River at Petrolia forecast point
The National Weather Service forecast is temporarily unavailable.
Live data
Where these readings come from
RiverReports gauge: Mattole River near Petrolia
How to fish it
How to fish Mattole River at Petrolia today.
Best windows come after the river is open under CDFW low-flow rules and the hydrograph is dropping into fishable shape. Skip Mattole River at Petrolia during closures, muddy storm pulses, hot low water, or unclear access conditions.
Dropping lower-river flow
Most useful after storms when the river clears and remains open.
Bar and estuary influence
Lower-river water can behave differently than the upper gauge plan.
Road-impact storms
Skip when roads, crossings, or wind make travel questionable.
Closed or too low
Follow CDFW low-flow updates and leave salmonids alone.
Fishing words used on this page
- U.S. Geological Survey (USGS) gauge
- A USGS gauge is an official river station that measures flow or water height.
- Cubic feet per second (cfs)
- Cubic feet per second, or cfs, shows how much water passes the gauge each second.
- Blue-winged olive (BWO)
- Blue-winged olives, or BWOs, are small mayflies that often hatch in cool or cloudy weather.
- Caddis
- Caddis are small water insects. The adults look a little like tiny moths.
- Emerger
- An emerger copies an insect as it rises from below the water toward the surface.
- Midge
- Midges are tiny flies and a common trout food, especially in cold water.
- Soft hackle
- A soft-hackle fly has moving fibers that can look like an insect rising through the water.
- Streamer
- A streamer is a fly that looks like a small fish, leech, or other swimming food.
- Terrestrial
- Terrestrials are land insects, such as ants, beetles, and grasshoppers.
Why this call
Why this score
FlowUse caution
USGS shows 11 cfs. The flow has been stable over about 6 hours. USGS marks this reading provisional and may revise it. USGS records for this date (1912-2025, 77 readings) show a median near 35 cfs and a low-water marker near 22 cfs; today's flow is unusually low for the date. Low water can make fish spooky, warm, pressured, or concentrated; check temperature and handling risk.
Best mode nowUse caution
Wade: Wading is in play only where your chosen access has clear footing, legal entry, and no forced crossings.
SeasonHelps
Summer: Often more of a scouting, warmwater, surf, or estuary-adjacent planning season than a trout or steelhead season.
WeatherHelps
The current NWS air forecast is about 58F, and the next 24-hour high reaches about 73F. Mostly Cloudy.
Public alertsHelps
No active NWS alert was returned for this forecast point.
Trip notes
Trip notes
Check these before you choose a reach.
Open under CDFW low-flow rules, dropping after rain, and clear enough to fish without stressing salmonids.
Skip during closures, muddy storm spikes, hot low water, or when access depends on private-land assumptions.
Petrolia or Ferndale approach is the practical base. Check cdfw low-flow status, usgs petrolia flow, king range road conditions, and coastal weather, then pick a short legal access plan instead of trying to cover the whole river.
Check nearby BlueStreamFly reports if the gauge, rules, or weather do not fit the plan.
What to try
Mattole River at Petrolia flies through the year.
Match the time of year, then let rising fish and current speed guide the next change.
SeasonWhat to look forFlies to try
Winter
What to look forSparse midges, winter stones, salmonid eggs where legal, and baitfish movement
Spring
What to look forBWOs, caddis, small mayflies, sculpins, and fry movement
SummerCurrent
What to look forTerrestrials, caddis, midges, warmwater forage, and estuary bait
Fall
What to look forFirst rain pulses, small olives, caddis, and salmonid migration cues
Each fly name opens its matching Fly Box guide.
Access and safety
Mattole River at Petrolia access and rules.
Use these places as starting points. Open the access link below and check posted signs before you park or enter. Check CDFW low-flow rules, current sport fishing rules, and steelhead report-card requirements before fishing. Open status can change during the season.
Petrolia area
Remote lower-river planning base. Confirm parking and land status.
Mattole Beach / King Range
Use BLM current condition and road information before committing.
Lower river bars
Change after storms and can be private or unsafe.
BLM King Range directions identify the Petrolia and Mattole Beach approach, but anglers should verify current road, parking, and land conditions before fishing.
Confirm parking, land ownership, and current agency notices before relying on any access point.
Remote lower-river roads, wind, cold water, stream crossings, and limited services
River sources
Official Mattole River at Petrolia sources.
Official agencies and primary river operators come first. Secondary tools are labeled so you know what carries the most weight.
How this report was checked
How this report was checked
Reviewed byBlueStreamFly River Review Team
Trip guidance checked
What was checked: This report uses official regulation, flow, weather, access, and public-source material first, then adds practical angler planning guidance without replacing current rules.
Live measurements and forecasts keep their provider timestamps. Rules, access, and trip guidance use the source-review date shown here. BlueStreamFly planning advice is editorial interpretation, not an agency notice.
First-hand experience: BlueStreamFly does not claim a first-hand visit or local field test for this report unless a real contributor is explicitly named and linked.
Rules and closures
Check what is allowed, where the rule applies, and whether the river is open.
Flow and weather
Check the latest river reading and forecast before you leave.
Access and land
Check public entry points, land rules, and seasonal access changes.
More helpful links
Use these links for stocking, safety, and other local details.
See all 9 checked sources
Rules and closures
Check what is allowed, where the rule applies, and whether the river is open.
What this source covers
Open the current rules and check the river section, season, and special limits.
What this source covers
Open the current rules and check the river section, season, and special limits.
Flow and weather
Check the latest river reading and forecast before you leave.
What this source covers
Open this page and check the latest safety advice before your trip.
What this source covers
Open this river reading to check the latest level, flow, and update time.
What this source covers
Open this river reading to check the latest level, flow, and update time.
Access and land
Check public entry points, land rules, and seasonal access changes.
What this source covers
Open the land or access page, then check signs before you park or enter.
More helpful links
Use these links for stocking, safety, and other local details.
What this source covers
Open this page for more river information and check when it was last updated.
What this source covers
Open this page for more river information and check when it was last updated.
What this source covers
Open this page for more river information and check when it was last updated.
Quick answers
Quick Mattole River at Petrolia answers.
Is Mattole River at Petrolia usually open for fly fishing?
Do not assume it is open. North Coast low-flow rules and salmonid protections can close these waters when flows are too low or conditions are stressful.
Should I wade or float?
Wading from legal access is usually the safer planning baseline. Floating requires current local access knowledge, safe flow, and a realistic takeout.
Which flow source should I use?
Use the RiverReports chart for a fast read and USGS 11469000 as the official flow source or context source.