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Great Slave Lake at Hay River at Hay River water level today

Lake in Northwest Territories

156.657m
513.97 ft · gauge reading (local datum, not an elevation)
Measured · provisional
Above normal for the dateFalling
24 hours
▼ 0.052 m
7 days
▼ 0.102 m
30 days
▼ 0.155 m
Normal for Oct 23 ?
156.549 m

At a glance · Oct 23

Higher than usual

Great Slave Lake at Hay River at Hay River is 0.11 m higher than normal for Oct 23, higher than on this date in 7 of the last 9 years.

  • This week↘ Falling 0.10 m
  • Lowest on record↓ 155.97 m (2023)

Compared with this gauge's own records for the same date. A statistical guide, not advice.

Normal for Oct 23Record lowToday156.66 m

Today compared with past years on Oct 23

Lowest to highest on this date: 156.10–157.22 mUsual range (10th–90th percentile): 156.26–156.76 mNormal (25th–75th percentile): 156.42–156.63 mToday: 156.66 mToday 156.66 mMedian 156.55Lowest 156.10Highest 157.2225th75th
Lowest to highest on this date: 156.10–157.22 mUsual range (10th–90th percentile): 156.26–156.76 mNormal (25th–75th percentile): 156.42–156.63 mToday: 156.66 mToday 156.66 mMedian 156.55Lowest 156.10Highest 157.2225th75th

Where today's reading sits among this gauge's own records for the same date (±3 days). A statistical guide, not advice.

What this means

It is lower than on Oct 23 in 2 of the last 9 years.

The lake has fallen 0.102 m in 7 days and fallen 0.155 m in 30 days.

Since 1959, the lowest daily level was 155.971 m (Nov 2023) and the highest 157.755 m (May 2021).

Great Slave Lake at Hay River at Hay River level chart

Loading chart…

Measured Normal range for the date (middle 50% of past years)

2026 compared with 2025

156.1156.4156.6156.9157.2JanFebMarAprMayJunJulAugSepOctNovDec20262026-09-22: 156.80 m2026-09-27: 156.86 m2026-10-02: 156.80 m2026-10-07: 156.79 m2026-10-12: 156.71 m2026-10-17: 156.71 m
156.1156.4156.6156.9157.2JanAprJulOct20262026-09-22: 156.80 m2026-09-27: 156.86 m2026-10-02: 156.80 m2026-10-07: 156.79 m2026-10-12: 156.71 m2026-10-17: 156.71 m
2026Normal (middle 50% of past years)Usual range (10th–90th percentile)Median

Each year drawn on the same January–December axis, over this gauge's normal range for each date. Hover or tap a point for its value.

Same date in past years

DateLevelvs today
Oct 23, 2024156.121 m▼ 0.536 m
Oct 23, 2023156.142 m▼ 0.515 m
Oct 23, 2022156.562 m▼ 0.095 m
Oct 23, 2021156.944 m▲ 0.287 m
Oct 23, 2020157.170 m▲ 0.513 m
Oct 23, 2019156.476 m▼ 0.181 m
Oct 23, 2018156.492 m▼ 0.165 m
Oct 20, 2017156.562 m▼ 0.095 m
Oct 23, 2016156.565 m▼ 0.092 m

Records & details

Highest
157.755 m on May 8, 2021
Lowest
155.971 m on Nov 16, 2023
Records from
1959 (68 years of daily data)
Water temperature
Not measured here

Full history: yearly highs and lows, monthly averages →