Sea Temperature in Charleston in May

Complete information on the sea temperature range in the Atlantic Ocean in Charleston in May. Historical daily data. Climate details for May. Tips on swimming conditions and beach relaxation in Charleston. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.

Water Temperature Range in Charleston in May

19°C

MINIMUN

22.5°C

AVERAGE

26°C

MAXIMUM

Historical Data of Water Temperature in May in Charleston

Water Temperature Chart for Atlantic Ocean in Charleston in May

Sea Temperature Table in Charleston in May Over the Past Years

Day	2024	2023	2022	Average
May 1	22°C	21°C	20°C	21.0°C
May 2	21°C	21°C	20°C	20.8°C
May 3	22°C	21°C	20°C	21.0°C
May 4	22°C	22°C	20°C	21.5°C
May 5	23°C	22°C	21°C	21.8°C
May 6	23°C	22°C	21°C	22.0°C
May 7	22°C	21°C	21°C	21.8°C
May 8	22°C	22°C	21°C	22.0°C
May 9	23°C	21°C	21°C	22.0°C
May 10	23°C	21°C	22°C	22.5°C
May 11	23°C	21°C	22°C	22.3°C
May 12	23°C	21°C	22°C	22.3°C
May 13	21°C	21°C	22°C	21.8°C
May 14	21°C	21°C	23°C	22.0°C
May 15	23°C	22°C	23°C	22.8°C
May 16	22°C	22°C	23°C	22.8°C
May 17	22°C	22°C	23°C	22.5°C
May 18	22°C	22°C	24°C	22.8°C
May 19	23°C	24°C	24°C	23.5°C
May 20	23°C	23°C	24°C	23.5°C
May 21	24°C	24°C	24°C	24.0°C
May 22	23°C	23°C	24°C	23.3°C
May 23	24°C	24°C	25°C	24.3°C
May 24	24°C	24°C	25°C	24.0°C
May 25	25°C	24°C	25°C	24.5°C
May 26	24°C	24°C	25°C	24.3°C
May 27	25°C	24°C	26°C	24.8°C
May 28	24°C	24°C	26°C	24.8°C
May 29	25°C	24°C	26°C	25.0°C
May 30	25°C	25°C	26°C	25.3°C

Charleston Climate and Swimming Opportunities in May

27°C

Average Day Air Temperature

17°C

Average Night Air Temperature

75 mm

Precipitation Amount per Month

9 days

Number of Rainy Days

14 hrs

Daylight
per Day

9 hrs

Sunshine
per Day

16 km/h

Average Wind Speed

73%

Average
humidity

Charleston lies within the South Carolina in United States. The average daytime temperature in Charleston in May is 81°F (27°C), while the nighttime average is 63°F (17°C). There are typically nine rainy days during the month, with a total precipitation of 2.9 inches (75 mm). The daylight duration in May in Charleston is 14 hours, with an average of 9 hours of sunshine per day. The average wind speed in May is 10 mph (16 km/h), and the humidity level is around 73%.

The water temperature in Charleston in May ranges from 68°F to 77°F (20°C to 25°C). At the beginning of the month, the average temperature is around 70°F (21°C), shifting to 72°F (22°C) by mid-May and reaching 75°F (24°C) in the last ten days. Overall, the average sea temperature in Charleston for May is 73°F (23°C). Perfect swimming weather — warm water and hot air make for an enjoyable and relaxing experience.

Sea Temperature in May in Nearby Cities

Frequently Asked Questions About Water Temperatures in May in Charleston

What is the sea temperature in Charleston in May?

The water temperature in the Atlantic Ocean in Charleston in May ranges from 68°F to 77°F (20°C to 25°C).

Is it possible to swim in the Atlantic Ocean in Charleston in May?

The average sea temperature in Charleston in May is 73°F (23°C), and the air temperature is 81°F (27°C), so perfect swimming weather — warm water and hot air make for an enjoyable and relaxing experience.