Lac Long
46.2227° N, 76.1262° W
Shoreline and neighbouring water from open government data.
Download the map (SVG)Lac Long, Quebec. 46.2227° N, 76.1262° W
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/qc/lac-long-near-gracefield/, 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.
- États trophiques des lacs (RSVL), Ministère de l’Environnement, de la Lutte contre les changements climatiques, de la Faune et des Parcs. Licensed under CC BY 4.0. Source: Ministère de l’Environnement, de la Lutte contre les changements climatiques, de la Faune et des Parcs (MELCCFP), Données Québec.
- 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).
Lac Long covers 1.5 km², making it larger than 80% of the 29,407 lakes in Quebec. It lies beside Lac-Long.
- Area
- 1.5 km²
- larger than 80% of the 29,407 lakes in Quebec
- Shoreline
- 16.6 km
- longer than 86% of the 29,407 lakes in Quebec
- Water clarity
- 4.7 mSecchi depth, 2025
- clearer than 67% of the 805 monitored lakes in Quebec
- Elevation
- 186 m
Today on the water
6.3 °C
Observed at Maniwaki, as of 5:00 a.m. EDT
choppy Estimated waves, next 12 hours: up to 0.2 m. Around 9 a.m., wind from the northwest: the northwest shore is sheltered, waves build toward the southeast shore.
| Time | 6 a.m. | 9 a.m. | 12 p.m. | 3 p.m. | 6 p.m. | 9 p.m. | 12 a.m. | 3 a.m. |
|---|---|---|---|---|---|---|---|---|
| Wind km/h | NW 10 | NW 20 | NW 20 | NW 20 | NW 10 | var. 5 | var. 5 | var. 5 |
| Waves (est.) m | 0.1 | 0.2 | 0.2 | 0.2 | 0.1 | |||
| Temp. °C | 6 | 8 | 9 | 10 | 9 | 5 | 2 | 1 |
| Precip. % | 30 | 30 | 30 | 30 | 0 | 0 | 0 | 0 |
Today: A mix of sun and cloud with 30 percent chance of showers. Wind becoming northwest 20 km/h this morning. High 11. UV index 3 or moderate.
Weather: Maniwaki (local forecast), as of 5:04 a.m. EDT
Sun and moon
- Civil dawn
- 6:43 a.m.
- Sunrise
- 7:13 a.m.
- Sunset
- 6:29 p.m.
- Civil dusk
- 6:59 p.m.
- Moonrise
- 6:04 a.m.
- Moonset
- 5:47 p.m.
- Moon
- Waning crescent, 1% lit
Follow this lake by email: a weekly summary of conditions.
Water
Trophic status from the latest monitoring: oligotrophic.
Clarity was measured with a Secchi disk in 5 years between 2008 and 2025; the latest annual mean is 4.7 m.
Follow this lake
Every Friday by email: the Environment Canada forecast and any weather alerts in effect.