Water temperature

Minnesota water temperature

Name: Minnesota water temperature
Creator: Tide & Temp
License: https://creativecommons.org/publicdomain/zero/1.0/

Latest NOAA water temperatures across Minnesota, updated daily from CO-OPS sensors and NDBC buoys.

Warmest water in Minnesota today: 57.4 F at Duluth; coldest: 47.3 F at Ontonagon, MI (buoy 45216).
2 NOAA CO-OPS water-temperature sensors and 6 NDBC buoys report for Minnesota as of October 18, 2026 (UTC).

NOAA CO-OPS sensors in Minnesota

Latest hourly reading; 30-day range; typical = 5-year mean for October at that sensor.

Station	Water now	30-day range (F)	Typical Oct (F)	Read (local)
Duluth	57.4 F 14.1 C	57.4 to 62.4	59.0	04:00 10-18
Grand Marais, Lake Superior	52.7 F 11.5 C	52.5 to 53.6	54.9	04:00 10-18

Buoys are assigned to the state of the nearest NOAA tide station. Observation times are UTC.

Buoy	Location	Water	Air	Waves	Observed
45001	MID SUPERIOR- 60 NM North Northeast Hancock, MI	47.5 F 8.6 C	50 F	4.9 ft	08:50 UTC
45006	WEST SUPERIOR - 30NM NE of Outer Island, WI	47.5 F 8.6 C	51 F	4.6 ft	08:50 UTC
45023	North Entry Buoy, North Keweenaw Peninsula, MI	52.5 F 11.4 C	49 F	0.7 ft	12:40 UTC
45216	Ontonagon, MI	47.3 F 8.5 C	50 F	0.3 ft	18:40 UTC
DULM5	9099064 - Duluth, MN	57.4 F 14.1 C	51 F		08:48 UTC
GDMM5	9099090 - Grand Marais, MN	52.7 F 11.5 C	48 F		08:48 UTC