Lagoa Serrano — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lagoa Serrano, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lagoa Serrano today is 14.3°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 54°F (12°C) to 60°F (15°C). The water is significantly warmer, and swimming becomes possible for most people. However, caution may still be required for prolonged stays in the water, as extended exposure can cause discomfort. This is a suitable temperature range for short swims and for those accustomed to cooler water. For more comfortable swimming, it is recommended to use proper gear. It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.
Water Temperature Chart Over the Last 30 Days
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| JUN 23 | 13.9°C | 18.9°C | |
| JUN 24 | 14.9°C | 18.9°C | |
| JUN 25 | 14.9°C | 18.9°C | |
| JUN 26 | 14.9°C | 18.9°C | |
| JUN 27 | 14.8°C | 18.9°C | |
| JUN 28 | 13.6°C | 18.9°C | |
| JUN 29 | 13.6°C | 18.9°C | |
| JUN 30 | 13.7°C | 18.9°C | |
| JUL 1 | 20.0°C | 14.6°C | |
| JUL 2 | 20.0°C | 14.9°C | |
| JUL 3 | 20.0°C | 15.2°C | |
| JUL 4 | 20.0°C | 15.4°C | |
| JUL 5 | 20.0°C | 15.7°C | |
| JUL 6 | 20.0°C | 16.0°C | |
| JUL 7 | 20.0°C | 16.3°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.
Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts to enhance accuracy.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 0°C | 2°C | 5°C |
| February | 0°C | 4°C | 7°C |
| March | 1°C | 5°C | 8°C |
| April | 3°C | 7°C | 11°C |
| May | 6°C | 12°C | 18°C |
| June | 10°C | 19°C | 27°C |
| July | 14°C | 20°C | 25°C |
| August | 16°C | 21°C | 26°C |
| September | 13°C | 19°C | 24°C |
| October | 7°C | 11°C | 14°C |
| November | 2°C | 7°C | 10°C |
| December | 0°C | 4°C | 8°C |
Lagoa Serrano: Water Temperature by Location
Lagoa Serrano: Weather Forecast
July 1
July 2
July 3
July 4
Location & Local Information
Lagoa Serrano, in the Guarda District, is a small inland lake whose water temperatures reflect its higher-elevation continental climate. Seasonal surface temperatures typically range from roughly 4–8 °C (39–46 °F) in winter to about 16–22 °C (61–72 °F) in summer, with spring values often between 6–14 °C (43–57 °F) and autumn cooling to around 10–16 °C (50–61 °F). These figures are approximate and depend on recent weather, wind, depth and shading; even in summer the deeper or shaded parts remain noticeably colder than lowland or coastal bathing waters.
Swimming at Lagoa Serrano is possible during the warmer months, but it is not a formally managed bathing beach in most years, so local rules, signage or temporary closures for water quality or conservation can apply. Many visitors swim in summer when surface temperatures are at their highest, though cold water, lack of lifeguard services and submerged hazards make caution advisable. Wearing a wetsuit, avoiding solo swims and checking for any posted restrictions or recent water-quality notices are prudent steps before entering the lake.