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Tide & TempNOAA tides and water temperature

Great Lakes

Lake St. Clair water temperature

Lake-average surface temperature 62.5 F (16.9 C) on Saturday, October 17, 2026.

NOAA GLERL GLSEA daily analysis; updated once a day, usually with a one-day lag.

Lake St. Clair lake-average surface water temperature is 62.5 F (16.9 C) as of October 17, 2026, from NOAA GLERL's GLSEA analysis.
That is 0.4 F warmer than a week earlier (62.1 F on October 10, 2026).
On the same date last year Lake St. Clair averaged 61.2 F.
So far in 2026 the warmest day was 78.6 F on July 15, 2026 and the coldest 32.4 F on January 1, 2026.

2026 (F)2025

Last 14 days

Date	F	C
Oct 17	62.5	16.95
Oct 16	62.9	17.19
Oct 15	63.3	17.37
Oct 14	63.6	17.53
Oct 13	63.6	17.54
Oct 12	62.9	17.18
Oct 11	62.4	16.87
Oct 10	62.1	16.72
Oct 9	62.2	16.79
Oct 8	62.4	16.91
Oct 7	62.6	17.02
Oct 6	62.9	17.19
Oct 5	63.5	17.49
Oct 4	63.8	17.67

Shore sensors and buoys near Lake St. Clair

Point readings at the shore or on a buoy differ from the lake-wide average; nearshore water is usually warmer in summer.

AlgonacCO-OPS sensor · 58.8 F
MarbleheadCO-OPS sensor · 60.8 F
ToledoCO-OPS sensor · 61.3 F
ClevelandCO-OPS sensor · 63.3 F
FairportCO-OPS sensor · 61.3 F
Harbor BeachCO-OPS sensor · 53.1 F
Buoy 45147, Lake St Clair57.4 F
Buoy AGCM4, 9014070 - Algonac, MI58.8 F
Buoy 45209, Lakeport Buoy, MI59.5 F
Buoy 45201, Erie Islands Buoy61.5 F
Buoy 45165, Toledo Water Intake Buoy, Oregon, OH59.9 F
Buoy TWCO1, Toledo Crib, OH60.3 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.