Santo Tirso — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Santo Tirso, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Santo Tirso today is 19.7°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming. 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 |
|---|---|---|---|
| SEP 14 | 18.9°C | 19.0°C | |
| SEP 15 | 18.4°C | 19.0°C | |
| SEP 16 | 19.0°C | 19.0°C | |
| SEP 17 | 18.9°C | 19.0°C | |
| SEP 18 | 19.4°C | 19.0°C | |
| SEP 19 | 19.5°C | 19.0°C | |
| SEP 20 | 19.6°C | 19.0°C | |
| SEP 21 | 19.7°C | 19.0°C | |
| SEP 22 | 19.0°C | 19.7°C | |
| SEP 23 | 19.0°C | 19.6°C | |
| SEP 24 | 19.0°C | 19.6°C | |
| SEP 25 | 19.0°C | 19.6°C | |
| SEP 26 | 19.0°C | 19.5°C | |
| SEP 27 | 19.0°C | 19.5°C | |
| SEP 28 | 19.0°C | 19.5°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 |
Santo Tirso: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Santo Tirso (in Portuguese - Santo Tirso) sits in the Grande Porto area of northern Portugal and is close to a few small reservoirs and riverine lakes where water temperatures reflect the Atlantic-influenced climate. Typical seasonal surface temperatures for inland standing water near Santo Tirso run roughly 8–12 °C (46–54 °F) in winter, 12–18 °C (54–64 °F) in spring, 18–24 °C (64–75 °F) in summer and back to about 12–18 °C (54–64 °F) in autumn. Shallower or more sheltered bodies of water can warm a bit higher in hot summer spells, while deeper or flowing sections stay cooler. These figures are approximate and vary year to year with weather and recent rainfall.
Swimming opportunities depend on the specific site and local rules rather than a blanket allowance. Some lakes and reservoirs close to Santo Tirso may permit recreational bathing, but many are not officially designated as monitored beaches, so lifeguards, water-quality monitoring and amenities may be absent. Authorities may prohibit or discourage swimming where there are safety hazards (steep banks, hidden debris, sudden depth changes), poor water quality, or when the area is managed primarily for water supply or habitat protection. Visitors should follow municipal signage and local guidance before entering the water.