Great Lakes
Lake Superior water temperature
Lake-average surface temperature 51.9 F (11.1 C) on Saturday, October 17, 2026.
- Lake Superior lake-average surface water temperature is 51.9 F (11.1 C) as of , from NOAA GLERL's GLSEA analysis.
- That is 2.8 F cooler than a week earlier (54.7 F on ).
- On the same date last year Lake Superior averaged 54.4 F.
- So far in 2026 the warmest day was 63.9 F on and the coldest 32.7 F on .
2026 (F)2025
Last 14 days
| Date | F | C |
|---|---|---|
| Oct 17 | 51.9 | 11.08 |
| Oct 16 | 52.3 | 11.28 |
| Oct 15 | 52.9 | 11.60 |
| Oct 14 | 53.4 | 11.90 |
| Oct 13 | 54.0 | 12.25 |
| Oct 12 | 54.6 | 12.56 |
| Oct 11 | 54.8 | 12.69 |
| Oct 10 | 54.7 | 12.62 |
| Oct 9 | 54.6 | 12.53 |
| Oct 8 | 54.7 | 12.60 |
| Oct 7 | 55.0 | 12.75 |
| Oct 6 | 55.3 | 12.93 |
| Oct 5 | 55.8 | 13.21 |
| Oct 4 | 56.4 | 13.54 |
Shore sensors and buoys near Lake Superior
- Grand Marais, Lake SuperiorCO-OPS sensor · 52.7 F
- Buoy 45001, MID SUPERIOR- 60 NM North Northeast Hancock, MI47.5 F
- Buoy 45213, East Superior Spotter50.9 F
- Buoy 45023, North Entry Buoy, North Keweenaw Peninsula, MI52.5 F
- Buoy 45211, Grand Island North, MI52.7 F
- Buoy 45216, Ontonagon, MI47.3 F
- Buoy 45006, WEST SUPERIOR - 30NM NE of Outer Island, WI47.5 F
Source: NOAA GLERL Great Lakes Surface Environmental Analysis (GLSEA), daily lake-average surface temperature from satellite imagery. CSV of every day this year and last.