Arcos de Valdevez — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Arcos de Valdevez, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Arcos de Valdevez today is 16.4°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 60°F (15°C) to 65°F (18°C). The water is comfortable for most people, making it an ideal range for water sports enthusiasts. The temperature does not cause significant discomfort, and swimming will be pleasant for the majority. However, it's important to remember that prolonged exposure to the water can still lead to cooling, so it's essential to monitor the time spent in the water, especially for children or elderly people. 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 1 | 18.2°C | 19.0°C | |
| JUN 2 | 19.0°C | 19.0°C | |
| JUN 3 | 18.9°C | 19.0°C | |
| JUN 4 | 17.5°C | 19.0°C | |
| JUN 5 | 17.5°C | 19.0°C | |
| JUN 6 | 17.5°C | 19.0°C | |
| JUN 7 | 17.2°C | 19.0°C | |
| JUN 8 | 16.4°C | 19.0°C | |
| JUN 9 | 19.0°C | 16.5°C | |
| JUN 10 | 19.0°C | 16.7°C | |
| JUN 11 | 19.0°C | 16.8°C | |
| JUN 12 | 19.0°C | 16.9°C | |
| JUN 13 | 19.0°C | 17.1°C | |
| JUN 14 | 19.0°C | 17.2°C | |
| JUN 15 | 19.0°C | 17.3°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 | 5°C | 9°C | 11°C |
| February | 5°C | 8°C | 12°C |
| March | 8°C | 11°C | 14°C |
| April | 10°C | 14°C | 17°C |
| May | 13°C | 18°C | 22°C |
| June | 15°C | 19°C | 24°C |
| July | 17°C | 21°C | 26°C |
| August | 18°C | 22°C | 27°C |
| September | 15°C | 19°C | 24°C |
| October | 12°C | 16°C | 18°C |
| November | 9°C | 13°C | 16°C |
| December | 5°C | 9°C | 13°C |
Arcos de Valdevez: Weather Forecast
June 9
June 10
June 11
June 12
June 13
June 14
Location & Local Information
Arcos de Valdevez, in the Viana do Castelo District, sits amid river valleys and small reservoirs that reflect the Atlantic-influenced climate of northern Portugal. Water temperatures in the local lakes and river beaches vary markedly by season and depth: in winter surface temperatures commonly range from about 6–12 °C (43–54 °F), in spring 10–16 °C (50–61 °F), in summer 18–26 °C (64–79 °F) with the warmest, shallowest spots occasionally reaching the upper 20s °C (80s °F) on hot spells, and in autumn 12–20 °C (54–68 °F). These figures are general guidelines—actual temperatures depend on recent weather, water depth, and flow from upstream sources, and deeper or fast-flowing stretches remain noticeably cooler year-round.
Swimming is generally permitted in designated river beaches and lake areas around Arcos de Valdevez, especially during the warmer months when local authorities monitor water quality and safety. Access may be restricted or discouraged during high flows, heavy rains, water treatment operations, or when authorities detect contamination or blue‑green algae, and lifeguard coverage is not guaranteed outside official bathing areas and peak season. Visitors should follow posted signs and local guidance: allowed swimming typically reflects acceptable water quality and manageable currents, while prohibitions are issued for public-safety or environmental reasons.