High · Low
Marginal today
reservoir / FMZ 16Mountsberg Reservoir
Mountsberg Reservoir is a shallow, weed-choked marsh with a flood-control dam bolted on one end. Bronte Creek backs up behind the Mountsberg Dam — 1967 vintage, one of Conservation Halton's four Hurricane Hazel dams — spreading into roughly 190 hectares of warmwater marsh inside Mountsberg Conservation Area at Campbellville.
Target Species
02 - Conditions
Today's read.
Quick Summary
Rainy and mild, with a high of 24° and a low of 17°. Breezy, gusts to 49 km/h. Steady pressure should keep the bite consistent.
Daily max · 0-11
Avg · S · gusts to 49 km/h
steady · -1 hPa/24h
14h 55m daylight
Lunar phase
Peak 3.1 mm/h · 9 wet hrs
C+
Marginal today
Choppy — a 12 km/h average over 3.1 km of fetch keeps you on the north shore with short runs. Gusts spike to 49 km/h at times — check the hourly and time your launch. Good bite potential — with bright sun, dawn and dusk are your windows. Fish the north shore where wind stacks bait and keep it tight to cover.
Craft Verdicts
No trailer launch in seed dataCarry-in launch3.1 km max fetchPressure steady (-1 hPa/24h)
Powerboat
No trailer ramp here — a powerboat can't launch.
Kayak
Launchable but exposed — a 28 km/h average gust and 3.1 km of fetch will test a kayak's low, wind-caught profile; put in on the north shore and stay tight to it. Gusts spike to 49 km/h at times — time your launch.
Canoe
Too rough — a 28 km/h average gust over 3.1 km of fetch overwhelms an open canoe's shallow draft; not a safe launch today. Gusts spike to 49 km/h at times — time your launch.
Hourly Conditions
5:00 a.m.
19°Temp
UV0
Precip2.9mm
PressureSteady
Fish ActivityHigh
Wind · SW10kph
Gust26kph
Launch ReadCaution
7:00 a.m.
19°Temp
UV0
Precip0.0mm
PressureSteady
Fish ActivityHigh
Wind · SW13kph
Gust28kph
Launch ReadCaution
9:00 a.m.
21°Temp
UV1
Precip0.0mm
PressureSteady
Fish ActivityHigh
Wind · SW13kph
Gust26kph
Launch ReadCaution
11:00 a.m.
24°Temp
UV2
Precip0.2mm
PressureSteady
Fish ActivityHigh
Wind · SW15kph
Gust49kph
Launch ReadDo Not Launch
Windy!1:00 p.m.
24°Temp
UV5
Precip0.3mm
PressureSteady
Fish ActivityHigh
Wind · SW13kph
Gust44kph
Launch ReadDo Not Launch
Windy!3:00 p.m.
21°Temp
UV7
Precip1.7mm
PressureSteady
Fish ActivityFair
Wind · W5kph
Gust13kph
Launch ReadFishable
5:00 p.m.
20°Temp
UV4
Precip0.1mm
PressureSteady
Fish ActivityFair
Wind · SW12kph
Gust23kph
Launch ReadCaution
7:00 p.m.
20°Temp
UV1
Precip0.0mm
PressureSteady
Fish ActivityHigh
Wind · NW10kph
Gust22kph
Launch ReadCaution
9:00 p.m.
19°Temp
UV0
Precip0.0mm
PressureSteady
Fish ActivityHigh
Wind · NW10kph
Gust10kph
Launch ReadCaution
Weekly Outlook
LaunchCaution
BiteHigh
LaunchCaution
BiteHigh
LaunchFishable
BiteFair
LaunchFishable
BiteFair
LaunchFishable
BiteHigh
LaunchCaution
BiteMaximum
LaunchFishable
BiteMaximum
01
How it fishes
The reservoir's marsh is a provincially significant waterfowl staging area and a regionally significant waterfowl breeding area, and "supports a vibrant warmwater fish community."
SourceMountsberg Dam (1967) is one of Conservation Halton's four major flood-control dams built in the aftermath of Hurricane Hazel (1954).
SourceNorthern pike are prominent enough that the watershed study recommended a pike management strategy to limit their impact on the native fish community.
SourceMountsberg is one of only a handful of Conservation Halton properties where recreational fishing is permitted (Kelso, Hilton Falls, Mountsberg, Robert Edmondson).
Source02
Regulations snapshot
This is a summary, not the legal regulation — confirm current rules with the official source before fishing.
Largemouth Bass
Season: fourth Saturday in June to November 30 (2026: Jun 27–Nov 30)
Limit: S-6 / C-2 (combined with Smallmouth Bass)
Size: no size limit
Official sourceNorthern Pike
Season: January 1 to March 31 and second Saturday in May to December 31 (2026: May 9–Dec 31)
Limit: S-6 / C-2
Size: no size limit
Official source03
Access notes
Mountsberg Dam launch
Hand-launch / carry-in for canoes, kayaks, and larger non-motorized vessels (larger craft launch only at the dam). No gas motors; electric trolling motors are the only motorized exception.
Access sourceShoreline carry-in near the parking lot
Smaller craft can be carried a short distance from the parking lot to shore.
Access source04
Key resources
The actual regs, straight from the source — FMZ 16, Government of OntarioFishing rules, the live-bait ban, and where to launch — Conservation HaltonPark hours, fees, and gate — Mountsberg Conservation Area, Conservation HaltonThe marsh and its warmwater fishery — Bronte Creek Watershed Study, Conservation Halton (2002)