Block Island — Water Temperature in October

Water Temperature Range

13°C

minimum

18°C

average

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

October: Climate and Swimming Opportunities

Average Night Air Temperature

8°C

Average Day Air Temperature

18°C

Precipitation Amount per Month

97 mm

Number of Rainy Days

Daylight per Day

11 hrs

Sunshine per Day

7 hrs

Average Wind Speed

17 km/h

Average Humidity

71%

At such water and air temperatures, swimming often feels chilly and is best for short swims. Getting out can feel cold, so it helps to have dry clothes ready right away.