Montargil Reservoir — Current Water Temperature, Annual Trends and Forecast

Current Water Temperature

Water Temperature in Montargil Reservoir today is 25.5°C.

Montargil Reservoir: Water Temperature by Location

Montargil Reservoir: Weather Forecast

Location & Local Information

The Albufeira da Barragem de Montargil, a reservoir in the Portalegre district, experiences marked seasonal variation in surface water temperature. In winter the surface typically cools to about 10–14 °C (50–57 °F), while spring sees a rise into the mid-teens, roughly 14–20 °C (57–68 °F). Summer surface temperatures are warmest, commonly ranging from about 20–28 °C (68–82 °F) on sunny days, though shallow bays can occasionally warm a few degrees higher. In autumn the water generally falls back to around 15–22 °C (59–72 °F). Actual temperatures depend on recent weather, wind, inflows from tributaries and depth: deeper or shaded areas remain cooler than shallow, sun-exposed zones.

Swimming in the Montargil reservoir is a typical recreational activity and is often permitted, particularly in designated bathing spots and near river beaches that are monitored seasonally. The calm waters and relatively high summer temperatures make it attractive for bathing and water sports, but local rules may apply and access can be restricted for safety or water-quality reasons, such as algal blooms, boating zones, or fluctuating dam levels. Visitors are advised to use marked swimming areas, heed local signs and lifeguards where present, and be aware that temperatures drop rapidly outside summer months, affecting comfort and safety.

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