Mashpee — Water Temperature in May

Water Temperature Range

6°C

minimum

12°C

average

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

May: Climate and Swimming Opportunities

Average Night Air Temperature

9°C

Average Day Air Temperature

18°C

Precipitation Amount per Month

89 mm

Number of Rainy Days

Daylight per Day

14 hrs

Sunshine per Day

8 hrs

Average Wind Speed

19 km/h

Average Humidity

72%

With such a ratio between the average monthly temperatures of water and air, swimming feels very cold and is only for cold-water enthusiasts. Most people will prefer just a brief splash, because warming up afterward can take time.