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Big Spanish Key, Florida Sea Temperature in October

Florida, United States

September Big Spanish Key, Florida year-round → November

Average sea temperature for Big Spanish Key, Florida, United States across October, based on 10 years of daily readings.

Average

28.36° C

High

30.47° C

Low

25.59° C

This water temperature is comparable to that of a swimming pool, but it might be higher than most open water swimmers prefer for serious swimming. Make sure to drink plenty of water before and after swimming and don't wear a wetsuit to avoid overheating.

October is the 5th warmest of 12 months at Big Spanish Key, Florida. On average the water sits 1.6° than the year-round mean of 26.75° C.

Compared to September, October is 1.9° cooler than (30.22° C in September). By November the water is usually 25.72° C.

Big Spanish Key, Florida Day-by-Day Water Temperature in October

10-year low, average and high

24.5° C
26.3° C
28.0° C
29.8° C
31.5° C
1
5
10
15
20
25
31
Day-by-day low and high band with the 10-year daily average through October. Range Average

Each vertical bar above is one day of October. The shaded band covers the range the water has reached on that day across the last 10 years — the lowest reading at the bottom, the highest at the top. The line running through the bars is the daily average over those 10 years, so you can see the typical shape of the month at Big Spanish Key, Florida.

A narrow band means the temperature on that day has stayed close to the average year on year. A taller band means it has swung more, often because of changeable weather around that time of year. Hovering a day pulls up its low, average, and high.

October Water Temperature Table for Big Spanish Key, Florida

10-year daily averages

Day Average Low High
October 1 29.39° C 27.87° C 30.15° C
October 2 29.35° C 27.71° C 30.4° C
October 3 29.27° C 27.75° C 30.47° C
October 4 29.14° C 27.75° C 30.46° C
October 5 29.07° C 27.65° C 30.47° C
October 6 29.02° C 27.61° C 30.33° C
October 7 29° C 27.62° C 30.14° C
October 8 28.99° C 27.63° C 29.76° C
October 9 29.02° C 27.74° C 29.82° C
October 10 28.91° C 27.83° C 29.71° C
October 11 28.9° C 28.05° C 29.73° C
October 12 28.87° C 27.84° C 29.7° C
October 13 28.83° C 27.83° C 29.81° C
October 14 28.91° C 28.05° C 29.95° C
October 15 28.92° C 28.35° C 29.94° C
October 16 28.83° C 28.18° C 29.69° C
October 17 28.62° C 28.01° C 29.36° C
October 18 28.33° C 27.78° C 29.25° C
October 19 28.05° C 27.14° C 29.09° C
October 20 27.95° C 26.88° C 28.87° C
October 21 27.78° C 26.62° C 28.95° C
October 22 27.61° C 26.46° C 28.92° C
October 23 27.44° C 25.8° C 28.88° C
October 24 27.39° C 25.59° C 28.82° C
October 25 27.35° C 25.68° C 28.74° C
October 26 27.36° C 25.94° C 28.77° C
October 27 27.35° C 26.08° C 28.62° C
October 28 27.4° C 26.24° C 28.6° C
October 29 27.38° C 26.22° C 28.56° C
October 30 27.37° C 26.4° C 28.47° C
October 31 27.39° C 26.34° C 28.6° C

Where October Sits in the Year

October highlighted

15.0° C
20.1° C
25.3° C
30.4° C
35.5° C
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
21.78° C
22.25° C
24.26° C
25.93° C
28.17° C
29.45° C
30.62° C
30.87° C
30.22° C
28.36° C
25.72° C
23.42° C
10-year monthly history for Big Spanish Key, Florida. Bars span historical low to high; the line marks the monthly average. Range Average
January → February → March → April → May → June → July → August → September → October → November → December →

Nearby Locations in October

Compare other United States water for the same month

Big Spanish Key, Florida Location

24.7883, -81.4117

24.78830, -81.41170 View on OpenStreetMap →

Big Spanish Key, Florida sits at 24.7883°N, 81.4117°W, on the coast of Florida, United States. The marker on the map shows the spot the readings on this page come from. It usually sits a short distance from the town centre, out on the open water itself, so the numbers stay tied to the coast rather than a generic point inland.

Coastlines bend, headlands focus the water, and the temperature can run noticeably differently between two beaches that look close together on a map. Comparing nearby locations is a quick way to see how local geography is shaping the readings.

Nearest locations to Big Spanish Key, Florida