What is the current water level of Great Slave Lake?

The current water level of Great Slave Lake (Northwest Territories) is 156.59 m, measured Nov 4, 6:35 a.m. at Water Survey of Canada gauge 07OB002.

Is the water level at Great Slave Lake rising or falling?

The level is currently falling: 0.18 m over the past seven days.

How does the current level compare with the last 16 days?

Over the past 16 days the gauge ranged from 156.47 to 156.74 m. The current reading sits in the middle of that range.

Where does the water level data for Great Slave Lake come from?

Readings come from the Great Slave Lake At Hay River gauge (07OB002) in Water Survey of Canada's realtime hydrometric network (ECCC), refreshed every 5 minutes to an hour depending on the station — loaded server-side on this page, fresh on every visit.

Great Slave Lake water level

Water level recorded at Water Survey of Canada gauge 07OB002, refreshed every 5 minutes to an hour depending on the station.

Good to know 📏 Reading Water Survey of Canada gauges: what the level number means 💨 Gust factor: an indicator of jibe-crash risk

Current level

156.59m

measured Nov 4, 6:35 a.m.

24-hour change

+0.01m

rising

7-day change

−0.18m

falling

Range (16 days)

156.47–156.74m

lowest to highest daily reading

Water levels, day by day

Date	Water level	Δ vs previous day
Nov 4●	156.59	↓ 0.01
Nov 3	156.60	↓ 0.01
Nov 2	156.61	↑ 0.07
Nov 1	156.54	↓ 0.02
Oct 31	156.56	↑ 0.09
Oct 30	156.47	↓ 0.01
Oct 29	156.48	↓ 0.12
Oct 28	156.60	↓ 0.13
Oct 27	156.74	↑ 0.12
Oct 26	156.62	↑ 0.10
Oct 25	156.52	↓ 0.12
Oct 24	156.64	0
Oct 23	156.64	↓ 0.03
Oct 22	156.68	↑ 0.04

Readings fetched Nov 4, 7:07 a.m. (just now); the chart below loads the current trace live from Water Survey of Canada.

Great Slave Lake water level — common questions

What is the current water level of Great Slave Lake?: The current water level of Great Slave Lake (Northwest Territories) is 156.59 m, measured Nov 4, 6:35 a.m. at Water Survey of Canada gauge 07OB002.
Is the water level at Great Slave Lake rising or falling?: The level is currently falling: 0.18 m over the past seven days.
How does the current level compare with the last 16 days?: Over the past 16 days the gauge ranged from 156.47 to 156.74 m. The current reading sits in the middle of that range.
Where does the water level data for Great Slave Lake come from?: Readings come from the Great Slave Lake At Hay River gauge (07OB002) in Water Survey of Canada's realtime hydrometric network (ECCC), refreshed every 5 minutes to an hour depending on the station — loaded server-side on this page, fresh on every visit.

Water level history

Water level · WSC gauge 07OB002

Reading the chart. Water Survey of Canada gauges report water level in metres above the station’s datum. The absolute number matters less than the trend: a falling level means shrinking launch depth and exposed shoals, a rising one means floating debris and lost beach.

Water levels respond to dam operations, irrigation drawdown, snowmelt, and recent rainfall. For launch decisions, combine the trend here with the wind forecast — low water plus strong wind makes steep, tired ramps.