Key Largo — Water Temperature in October

Water Temperature Range

24°C

minimum

28°C

average

31°C

maximum

Get instant access to real-time water temperatures for this and all other locations with our iOS and Android apps.

Water Temperature Chart for Month

The chart shows the average daily water temperature for each day of the month based on historical data.

Table of Water Temperatures by Day of the Month for Previous Years

Day	2025	2024	2023	2022
OCT 1	30°C	30°C	29°C	30°C
OCT 2	30°C	30°C	28°C	31°C
OCT 3	30°C	29°C	29°C	30°C
OCT 4	29°C	28°C	28°C	30°C
OCT 5	29°C	28°C	29°C	30°C
OCT 6	29°C	28°C	29°C	30°C
OCT 7	29°C	29°C	29°C	30°C
OCT 8	29°C	28°C	30°C	29°C
OCT 9	29°C	29°C	29°C	30°C
OCT 10	29°C	28°C	30°C	30°C
OCT 11	29°C	29°C	29°C	30°C
OCT 12	29°C	28°C	29°C	29°C
OCT 13	29°C	29°C	29°C	29°C
OCT 14	28°C	28°C	29°C	29°C
OCT 15	29°C	28°C	29°C	30°C
OCT 16	29°C	28°C	29°C	30°C
OCT 17	28°C	27°C	29°C	29°C
OCT 18	28°C	26°C	30°C	29°C
OCT 19	27°C	26°C	27°C	29°C
OCT 20	27°C	26°C	27°C	29°C
OCT 21	27°C	26°C	28°C	28°C
OCT 22	27°C	27°C	27°C	28°C
OCT 23	27°C	27°C	27°C	28°C
OCT 24	27°C	27°C	28°C	28°C
OCT 25	27°C	26°C	28°C	28°C
OCT 26	27°C	26°C	28°C	29°C
OCT 27	27°C	26°C	28°C	28°C
OCT 28	27°C	26°C	28°C	28°C
OCT 29	27°C	27°C	28°C	28°C
OCT 30	27°C	27°C	28°C	28°C
OCT 31	27°C	27°C	28°C	28°C

October: Climate and Swimming Opportunities

Average Night Air Temperature

23°C

Average Day Air Temperature

29°C

Precipitation Amount per Month

146 mm

Number of Rainy Days

Daylight per Day

11 hrs

Sunshine per Day

8 hrs

Average Wind Speed

17 km/h

Average Humidity

76%

At such water and air temperatures, swimming feels truly comfortable and relaxing. The warm water won’t cool you down, so you can stay in for a long time without getting chilled.