All data are in degrees Fahrenheit

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Water temperature in Saint-Nazaire

Detailed information about the current water temperature in Saint-Nazaire. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.
Sea temperature in Saint-Nazaire now

67.3

°F

August 13, 17:49

Trend:

decreasing

Yesterday:

68.3°F

Tomorrow:

67.3°F

Sunrise:

07:02

Sunset:

21:25

Day Length:

14 h. 23 min.

Saint-Nazaire in August

Minimum:

47.2°F

Average:

48.8°F

Maximum:

51.2°F

Sea water temperature in Saint-Nazaire today

As of now, in Saint-Nazaire, the water temperature is 67.3°F. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool. Today's reading is 0.2°F higher than the average recorded on this particular day in recent years. The sea temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to stay about the same.

Recent sea temperature and forecast

The water temperature today is above average for the last two weeks, showing a small increase in temperature. It also aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 70.5°F on 2020, while the historical minimum was 64.8°F on 2017.

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 67.1°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Saint-Nazaire

Date Current Year

actual* / forecast**

last year 10 years average
Jul 30 66.8°F 68.5°F 67.0°F
Jul 31 67.0°F 69.7°F 67.4°F
Aug 1 67.5°F 69.5°F 67.4°F
Aug 2 67.1°F 69.3°F 67.3°F
Aug 3 67.0°F 69.3°F 67.3°F
Aug 4 67.4°F 68.3°F 67.3°F
Aug 5 67.0°F 68.1°F 67.2°F
Aug 6 67.6°F 67.7°F 67.3°F
Aug 7 66.2°F 67.9°F 67.2°F
Aug 8 65.6°F 68.7°F 67.1°F
Aug 9 65.7°F 67.8°F 67.2°F
Aug 10 65.5°F 67.6°F 67.0°F
Aug 11 65.6°F 67.8°F 67.2°F
Aug 12 68.3°F 67.8°F 67.2°F
Aug 13 67.3°F 67.7°F 67.1°F
Aug 14 67.3°F 67.7°F 67.1°F
Aug 15 67.2°F 67.6°F 67.0°F
Aug 16 67.4°F 69.7°F 67.2°F
Aug 17 67.2°F 69.1°F 67.0°F
Aug 18 66.9°F 67.3°F 66.7°F
Aug 19 66.8°F 65.9°F 66.7°F
Aug 20 67.0°F 66.6°F 66.9°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in Saint-Nazaire by month

In an average year, Saint-Nazaire offers no days when the water temperature is warm enough to swim comfortably.
The warmest water in Saint-Nazaire was recorded on July 24, 2019, reaching a 73.0°F. While the coldest temperature occurred on February 2, 2025, dipping to 44.8°F. The average readings by season are 49.0°F in Winter, 54.3°F in Spring, 65.8°F in Summer, and 60.5°F in Autumn.