Ulla River — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the Ulla River, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the Ulla River today is 21.1°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience. 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 |
|---|---|---|---|
| JUL 19 | 19.9°C | 19.0°C | |
| JUL 20 | 19.9°C | 19.0°C | |
| JUL 21 | 20.2°C | 19.0°C | |
| JUL 22 | 21.0°C | 19.0°C | |
| JUL 23 | 21.0°C | 19.0°C | |
| JUL 24 | 21.0°C | 19.0°C | |
| JUL 25 | 21.0°C | 19.0°C | |
| JUL 26 | 21.1°C | 19.0°C | |
| JUL 27 | 19.0°C | 21.0°C | |
| JUL 28 | 19.0°C | 20.9°C | |
| JUL 29 | 19.0°C | 20.8°C | |
| JUL 30 | 19.0°C | 20.7°C | |
| JUL 31 | 19.0°C | 20.6°C | |
| AUG 1 | 19.0°C | 20.5°C | |
| AUG 2 | 19.0°C | 20.4°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 | 4°C | 8°C | 10°C |
| February | 4°C | 8°C | 10°C |
| March | 6°C | 9°C | 12°C |
| April | 8°C | 11°C | 15°C |
| May | 9°C | 14°C | 18°C |
| June | 12°C | 17°C | 21°C |
| July | 15°C | 19°C | 24°C |
| August | 15°C | 19°C | 24°C |
| September | 12°C | 17°C | 21°C |
| October | 10°C | 14°C | 17°C |
| November | 7°C | 10°C | 13°C |
| December | 4°C | 8°C | 10°C |
Ulla River: Water Temperature by Location
Ulla River: Weather Forecast
July 27
July 28
July 29
July 30
July 31
August 1
Location & Local Information
Source:
• location Montes da Vacaloura, Monterroso, Province of Lugo
• coordinates 42.745, -7.82
• elevation 570 m
Mouth Ría de Arousa estuary
• location near Catoira, Spain
• coordinates 42.67, -8.73
• elevation sea level
Length 132 km (82 mi)
The Río Ulla, in Galicia, flows from inland Galicia to the Ría de Arousa and presents water temperatures typical of Atlantic-influenced rivers in the region. Seasonal surface temperatures generally range from about 6–12 °C (43–54 °F) in winter, 10–16 °C (50–61 °F) in spring, 16–22 °C (61–72 °F) in summer, and 10–16 °C (50–61 °F) in autumn. Shallow, sun-exposed stretches warm more in summer, while deeper pools, shaded reaches and upstream sections remain cooler year-round. Tidal influence near the estuary also moderates temperatures but introduces salinity and flow variability.
Swimming in the Río Ulla is possible in many rural and designated bathing spots, but it is not uniformly recommended everywhere. Local rules, water quality monitoring, private property, seasonal flows and the presence of currents—especially in tidal estuary areas—determine where bathing is allowed and safe. Cooler temperatures outside summer increase the risk of cold shock and hypothermia, so longer swims are best limited to the warmer months when surface temperatures approach the upper part of the summer range. Always follow local signage and advisories, check water quality reports, and be cautious of underwater hazards and boat traffic before entering the river.