Big Gull Lake
44.8269° N, 76.9688° W
Depth contours from the 1958 government survey. Not for navigation.
Download the depth map (SVG)Big Gull Lake, Ontario. 44.8269° N, 76.9688° W
Maximum depth 24.4 m (1958 survey). Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/big-gull-lake/, compiled October 9, 2026
- Canadian Geographical Names Database, Natural Resources Canada. Contains information licensed under the Open Government Licence – Canada.
- HydroLAKES v1.0, Messager et al. 2016 / WWF HydroSHEDS. Licensed under CC BY 4.0.
- Census boundaries and population, 2021, Statistics Canada. Adapted from Statistics Canada. This does not constitute an endorsement by Statistics Canada.
- Aquatic Resource Area survey points, Ontario Ministry of Natural Resources. Contains information licensed under the Open Government Licence – Ontario.
- Fishing access points, Ontario Ministry of Natural Resources. Contains information licensed under the Open Government Licence – Ontario.
- Fisheries Management Zones, Ontario Ministry of Natural Resources. Contains information licensed under the Open Government Licence – Ontario.
- Lake Partner Program, Ontario Ministry of the Environment, Conservation and Parks. Contains information licensed under the Open Government Licence – Ontario.
- Bathymetry lines and survey index, Ontario Ministry of Natural Resources. Contains information licensed under the Open Government Licence – Ontario.
- City page weather forecasts and alerts, Environment and Climate Change Canada. Contains data from Environment and Climate Change Canada (ECCC Data Servers End-use Licence).
- Guide to Eating Ontario Fish: Advisory Database, Ontario Ministry of the Environment, Conservation and Parks. Contains information licensed under the Open Government Licence – Ontario.
Big Gull Lake is 24.4 m deep at its deepest point, deeper than 70% of the 2,688 surveyed lakes in Ontario. It covers 24.6 km² and lies 2.3 km north of Henderson.
Government surveys have recorded 17 fish species here, including cisco, rock bass and smallmouth bass.
- Maximum depth
- 24.4 msurveyed 1958
- deeper than 70% of the 2,688 surveyed lakes in Ontario
- Area
- 24.6 km²
- larger than 98% of the 18,731 lakes in Ontario
- Shoreline
- 130 km
- longer than 98% of the 18,731 lakes in Ontario
- Water clarity
- 4.1 mSecchi depth, 2025
- clearer than 63% of the 1,251 monitored lakes in Ontario
- Fish species
- 17
- more than 94% of the 2,454 surveyed lakes in Ontario
- Elevation
- 252 m
Today on the water
7.9 °C
Observed at Sharbot Lake, as of 2:00 a.m. EDT
choppy Estimated waves, next 12 hours: up to 0.3 m.
| Time | 3 a.m. | 6 a.m. | 9 a.m. | 12 p.m. | 3 p.m. | 6 p.m. | 9 p.m. | 12 a.m. |
|---|---|---|---|---|---|---|---|---|
| Wind km/h | W 15 | W 15 | W 15 | NW 30 | NW 30 | NW 15 | var. 5 | var. 5 |
| Gusts | 50 | 50 | ||||||
| Waves (est.) m | 0.2 | 0.2 | 0.2 | 0.3 | ||||
| Temp. °C | 4 | 4 | 7 | 11 | 13 | 12 | 6 | 2 |
| Precip. % | 20 | 40 | 40 | 40 | 40 | 20 | 20 | 0 |
Tonight: Partly cloudy. 60 percent chance of showers this evening. Risk of a thunderstorm early this evening. Wind west 30 km/h gusting to 50 becoming light this evening. Low plus 3.
Weather: Sharbot Lake (local forecast), as of 2:02 a.m. EDT
Sun and moon
- Civil dawn
- 6:46 a.m.
- Sunrise
- 7:15 a.m.
- Sunset
- 6:33 p.m.
- Civil dusk
- 7:02 p.m.
- Moonrise
- 6:07 a.m.
- Moonset
- 5:52 p.m.
- Moon
- Waning crescent, 1% lit
Follow this lake by email: a weekly summary of conditions.
Depth
28% of Big Gull Lake is deeper than 10 m.
How to read it: the lake’s area is sorted from the shore to the deepest point. Where the curve is flat, large areas share one depth (flats and weed beds); where it drops, depth changes quickly (drop-offs).
The government depth survey from 1958 records a maximum depth of 24.4 m, drawn from 66 depth contours.
- Download the depth map (SVG)Printing this page gives the map on one sheet, with scale and sources.
Not for navigation. Depths are from government surveys and may be outdated.
Fish
Sport fish by the share of the 32 government surveys (2010–2014) that recorded them.
Forage fish and other species (6)
Forage fish
- Bluntnose Minnow 5
- Blacknose Shiner 1
- Emerald Shiner 1
- Golden Shiner 1
Other
- White Sucker 4
- Brown Bullhead 1
Numbers are the surveys that recorded each species.
Eating your catch
The provincial guide to eating fish (2026) sets limits for 10 species from Big Gull Lake. Maximum meals per month:
| Species | Length | General population | Sensitive population* | Contaminant |
|---|---|---|---|---|
| Bluegill | 15-20 cm | 16 | 16 | Precautionary |
| Lake Whitefish | 45-50 cm | 16 | 8 | Mercury, PCB |
| Largemouth Bass | 30-35 cm | 12 | 4 | Mercury |
| Northern Pike | 55-60 cm | 16 | 4 | Mercury |
| Smallmouth Bass | 35-40 cm | 4 | Do not eat | Mercury |
| Walleye | 40-45 cm | 8 | 4 | Mercury |
| Yellow Perch | 20-25 cm | 16 | 8 | Mercury |
| Burbot (Ling) | 45-50 cm | 16 | 12 | Precautionary |
| Cisco (Lake Herring) | 30-35 cm | 16 | 8 | Mercury |
| White Sucker | 40-45 cm | 16 | 16 | Precautionary |
* As defined in the guide, including children and people who are or may become pregnant. Limits are for the length the guide lists most often; they change with the size of the fish. Read the official guide
Fishing regulations: Fisheries Management Zone 18. Check seasons and limits before you fish.
Water
Clarity was measured with a Secchi disk in 30 years between 1996 and 2025; the latest annual mean is 4.1 m.
Getting on the water
3 listed boat launches; 2 with parking listed. marks launches on the map.
Northeast end
- Boat launch
- Boat launch
Southeast shore
- Boat launch
Follow this lake
Every Friday by email: the Environment Canada forecast and any weather alerts in effect.