Alfeios River — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the Alfeios River, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the Alfeios River today is 18.7°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 |
|---|---|---|---|
| OCT 15 | 20.5°C | 18.0°C | |
| OCT 16 | 20.4°C | 18.0°C | |
| OCT 17 | 19.8°C | 18.0°C | |
| OCT 18 | 19.6°C | 18.0°C | |
| OCT 19 | 19.6°C | 18.0°C | |
| OCT 20 | 19.6°C | 18.0°C | |
| OCT 21 | 18.9°C | 18.0°C | |
| OCT 22 | 19.2°C | 18.0°C | |
| OCT 23 | 18.0°C | 18.7°C | |
| OCT 24 | 18.0°C | 18.6°C | |
| OCT 25 | 18.0°C | 18.6°C | |
| OCT 26 | 18.0°C | 18.6°C | |
| OCT 27 | 18.0°C | 18.5°C | |
| OCT 28 | 18.0°C | 18.5°C | |
| OCT 29 | 18.0°C | 18.5°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 | 6°C | 9°C | 13°C |
| February | 9°C | 12°C | 15°C |
| March | 10°C | 14°C | 17°C |
| April | 12°C | 15°C | 18°C |
| May | 14°C | 20°C | 24°C |
| June | 21°C | 25°C | 28°C |
| July | 22°C | 25°C | 29°C |
| August | 22°C | 25°C | 29°C |
| September | 22°C | 27°C | 28°C |
| October | 14°C | 18°C | 20°C |
| November | 11°C | 15°C | 18°C |
| December | 9°C | 13°C | 16°C |
Alfeios River: Water Temperature by Location
Alfeios River: Weather Forecast
October 22
October 23
October 24
October 25
October 26
October 27
Location & Local Information
Source Alpheios
• location Falaisia
• coordinates 37°12′07″N 22°08′17″E
• elevation 380 m (1,250 ft)
Mouth Ionian Sea
• location Gulf of Kyparissia
• coordinates 37°36′45″N 21°27′6″E
• elevation 0 m (0 ft)
Length 112 km (70 mi)
The Alfeios (Αλφειός) is one of the longest rivers in the Peloponnese and its water temperature varies noticeably through the year. In winter months (December–February) surface temperatures commonly sit around 6–12 °C (43–54 °F), while spring (March–May) usually warms to roughly 10–18 °C (50–64 °F). In the warmest months of late June through August temperatures in some slower, shallow stretches can reach about 18–24 °C (64–75 °F), dropping again in autumn (September–November) to roughly 14–20 °C (57–68 °F). Local conditions such as altitude, shade, groundwater springs and recent rainfall cause substantial variation, so measurements at a particular spot will differ from these general ranges.
Swimming is permitted in many accessible parts of the Alfeios and is popular in calmer pools and shallower banks, especially from late spring to early autumn when temperatures are most comfortable. However, there are no uniform lifeguard services along the river, and some reaches have strong currents, sudden depth changes, submerged rocks or agricultural runoff after heavy rain; such conditions can make swimming unsafe. Visitors are advised to choose well-used spots, heed local signage or advice, and avoid entering the river after storms when flow and water quality can deteriorate.