Charleston Sc Water Temperature

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Charleston, South Carolina, boasts a fascinating maritime climate that significantly influences its ocean water temperatures throughout the year. As winter transitions into early spring, the coastal waters present a unique thermal landscape that attracts both locals and visitors interested in understanding the marine environment.

Seasonal Water Temperature Variations

The Charleston ocean water temperature fluctuates dramatically across different seasons, ranging from a chilly 48.9°F in winter to a warm 82°F during summer months. This substantial variation creates a dynamic marine ecosystem and impacts various recreational activities along the coast.

Winter Water Temperatures

During February, like today on February 13, 2026, the water temperature hovers around 48.9°F, which is considered quite cold for swimming. Historical data shows that winter water temperatures in Charleston typically range between 48.6°F and 62.1°F, making it unsuitable for most water activities without specialized thermal protection.

Transitional Periods

As the season progresses, water temperatures begin to shift:

• March: Temperatures start to rise slightly, reaching around 16.9°C (62.4°F)
• April: Water temperatures approach a more comfortable 19.5°C (67.1°F)
• May: A significant warming occurs, with temperatures reaching a pleasant 22.8°C (73°F)

Swimming Season Insights

For those eager to enjoy Charleston’s coastal waters, the ideal swimming season spans from April to November. During this period, water temperatures consistently remain above 68°F, providing comfortable conditions for various marine activities.

Peak Swimming Months

The most enjoyable swimming months in Charleston are:

• June: Average water temperature of 26.3°C (79.3°F)
• July and August: Peak temperatures around 28.2-28.5°C (83-83.3°F)
• September: Maintains warm temperatures at 27.5°C (81.5°F)

Factors Influencing Water Temperature

Several environmental factors contribute to Charleston’s water temperature dynamics:

• Ocean currents: The Gulf Stream influences coastal water temperatures
• Seasonal wind patterns: Offshore and onshore winds impact surface temperatures
• Atmospheric conditions: Sunlight and air temperature play crucial roles

🌊 Note: Water temperatures can vary by several degrees near river mouths or after significant rainfall, so always check local conditions before swimming.

Understanding Charleston's water temperature patterns helps residents and visitors plan their marine activities more effectively, ensuring a safe and enjoyable coastal experience throughout the year.