BEAUFORT, SC — Aug. 15, 2026 — The National Weather Service Charleston forecast office has issued an Extreme Heat Warning for Beaufort County, effective from 11 a.m. to 8 p.m. EDT on Saturday, August 15, 2026. Residents are advised to take precautions as heat index values are projected to reach as high as 113 degrees Fahrenheit.
The current forecast for Beaufort on Saturday indicates a high temperature near 96 degrees. The combination of high temperatures and humidity creates dangerous conditions, prompting the official warning. Beaufort County government released a public advisory on Friday, August 14, cautioning residents about the ongoing threat of excessive heat.
The dangerous heat is expected to persist into Sunday, August 16, with a forecasted high near 97 degrees and heat index values potentially climbing to 115 degrees. There is a slight chance of showers and thunderstorms after 2 p.m. on Sunday, offering minimal relief. Looking ahead to the workweek, Monday, August 17, is expected to see a high near 99 degrees, followed by a high near 100 degrees on Tuesday, August 18. Overnight lows throughout the weekend and into the early part of the week are anticipated to remain uncomfortably warm, ranging from 79 to 81 degrees.
The National Weather Service issues an Extreme Heat Warning when the heat index, which is what the temperature feels like to the human body when relative humidity is combined with the air temperature, is expected to reach critically dangerous levels. Prolonged exposure to such conditions can lead to heat-related illnesses, including heat exhaustion and heatstroke, which can be life-threatening if not addressed promptly. Vulnerable populations, such as the elderly, young children, and individuals with chronic health conditions, are particularly at risk.
Local authorities and health officials urge residents to stay hydrated by drinking plenty of water, even if they do not feel thirsty. Avoiding sugary drinks, alcohol, and caffeine is also recommended, as these can contribute to dehydration. It is crucial to limit strenuous outdoor activities, especially during the hottest parts of the day. If outdoor work or exercise is unavoidable, individuals should take frequent breaks in shaded or air-conditioned areas.
The Beaufort County government’s advisory emphasized the importance of checking on neighbors, particularly those who may be isolated or lack access to air conditioning. Pets should also be protected from the heat; never leave animals in parked cars, and ensure they have access to fresh water and shade. Symptoms of heat exhaustion include heavy sweating, weakness, cold and clammy skin, a fast and weak pulse, nausea, vomiting, and fainting. If these symptoms occur, individuals should move to a cooler place, lie down, loosen clothing, and apply cool, wet cloths to the body. Sips of water may also be helpful.
Heatstroke is a more severe condition and constitutes a medical emergency. Symptoms include a body temperature of 103 degrees Fahrenheit or higher, hot, red, dry or moist skin, a rapid and strong pulse, and possible unconsciousness. If someone exhibits signs of heatstroke, immediate medical attention is necessary. Call 911 immediately, move the person to a cooler area, and try to cool them down with cool cloths or a bath.
The current observation from the Beaufort Marine Corps Air Station, recorded at 10:56 p.m. EDT on August 14, indicated a temperature of 76 degrees with light rain and 88 percent humidity. While this provided some temporary relief, the forecast for the weekend and early next week shows a significant increase in both temperature and heat index values, underscoring the need for continued vigilance.
Community centers and public libraries often serve as cooling centers during extreme heat events. Residents without access to air conditioning are encouraged to seek out these facilities. Information on specific cooling center locations and hours can typically be found on the Beaufort County government’s official website or by contacting local emergency management services. Staying informed about weather updates and following official guidance is paramount to ensuring public safety during this period of extreme heat.
