Brest — Water Temperature, Sea Conditions & Trends
This page provides clear and up-to-date information about water temperature for Brest (France). It includes the current water temperature, daily data for the last month presented in a simple chart, and a 7-day forecast. The page also compares today’s value with typical averages for this period, shows usual monthly ranges during the year, and lists nearby beaches with short descriptions. Local weather for the next few days and general details about Brest help you plan your visit and choose the best time for swimming.
Current Water Temperature
Water temperature in Brest in the Celtic Sea today is 18°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
Water temperature in Brest today is lower than both a week ago and a month ago. Currently, the sea water temperature at this location matches the average for this day in previous years.
According to our forecast, Water temperature in Brest will be 16.9°C in the next 7 days. See the table below for daily data for the upcoming week.
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| AUG 31 | 18.2°C | 16.8°C | |
| SEP 1 | 17.9°C | 16.8°C | |
| SEP 2 | 17.8°C | 16.8°C | |
| SEP 3 | 17.3°C | 16.5°C | |
| SEP 4 | 17.3°C | 16.8°C | |
| SEP 5 | 17.3°C | 16.8°C | |
| SEP 6 | 17.2°C | 16.8°C | |
| SEP 7 | 17.3°C | 17.0°C | |
| SEP 8 | 17.7°C | 17.0°C | 17.7°C |
| SEP 9 | 17.0°C | 17.6°C | |
| SEP 10 | 17.0°C | 17.5°C | |
| SEP 11 | 16.3°C | 17.3°C | |
| SEP 12 | 16.0°C | 17.2°C | |
| SEP 13 | 16.8°C | 17.1°C | |
| SEP 14 | 16.3°C | 17.0°C | |
| SEP 15 | 17.0°C | 16.9°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.
Water temperature data for this location is gathered from various sources, including buoys and satellite sea and ocean surface maps provided by the NOAA agency. We also incorporate data from local authorities in each specific location worldwide to ensure more accurate temperature readings.
Annual Water Temperature Overview by Month
Monthly Water Temp Ranges
Annual Water Temperature Trend
Brest sits on the western tip of Brittany, where the Atlantic and the English Channel meet, giving the area a strongly maritime climate and noticeable tidal movements. Sea temperatures off Brest are cool year‑round compared with more southerly coasts; typical winter values (December–February) hover around 9–11 °C, spring (March–May) gradually warms to roughly 10–14 °C, and summer (June–August) brings the warmest water, usually between 15–19 °C with occasional short peaks near 20 °C in late August. Autumn (September–November) sees a decline back to about 13–16 °C. Local variations occur: sheltered bays and shallower inlets warm faster, while exposed headlands and open ocean approaches remain colder and are subject to strong currents and tides.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 10°C | 11°C | 13°C |
| February | 9°C | 10°C | 12°C |
| March | 9°C | 10°C | 12°C |
| April | 9°C | 11°C | 13°C |
| May | 11°C | 13°C | 15°C |
| June | 12°C | 15°C | 17°C |
| July | 14°C | 16°C | 18°C |
| August | 14°C | 17°C | 19°C |
| September | 13°C | 17°C | 18°C |
| October | 13°C | 15°C | 17°C |
| November | 12°C | 14°C | 16°C |
| December | 11°C | 13°C | 14°C |
* Click on a month to view detailed water temperature data.
Brest: Weather Forecast
September 9
September 10
September 11
September 12
Location, Beaches & Local Information
Swimming Conditions
Swimming and beach holidays around Brest are appealing for those who enjoy cooler, invigorating sea conditions and a mix of sandy beaches and rocky coves. Popular summer months offer the most comfortable water temperatures and the highest number of supervised beaches, making family swimming and casual bathing most practical in July and August. Outside midsummer many swimmers wear wetsuits for comfort and longer sessions; open‑water enthusiasts and swimmers accustomed to colder water often swim year‑round at marked spots and in clubs. Beyond bathing, the area is well suited to snorkeling, kayaking and sailing, with plenty of coastal paths and facilities for visitors, though attention to tides, currents and local safety notices is important for a safe seaside holiday.