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

51.9

°F

December 7, 07:32

Trend:

decreasing

Yesterday:

52.0°F

Tomorrow:

51.6°F

Sunrise:

08:41

Sunset:

17:19

Day Length:

8 h. 38 min.

Saint-Nazaire in December

Minimum:

47.4°F

Average:

48.7°F

Maximum:

50.3°F

Sea water temperature in Saint-Nazaire today

As of now, in Saint-Nazaire, the water temperature is 51.9°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is about the same as 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 fall a bit.

Recent sea temperature and forecast

Today's water temperature is slightly lower than the average registered over the last two weeks, indicating a slight cooling trend. 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 54.6°F on 2015, while the historical minimum was 50.4°F on 2021.

Over the last two weeks, the water temperature has stayed slightly lower than historical averages for those days. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 51.0°F, the minimum temperature may reach 50.7°F, and the maximum might stay at 51.6°F.

Daily water temperature in Saint-Nazaire

Date Current Year

actual* / forecast**

last year 10 years average
Nov 23 54.5°F 53.9°F 54.3°F
Nov 24 54.5°F 53.9°F 54.1°F
Nov 25 53.6°F 53.9°F 53.9°F
Nov 26 52.6°F 53.3°F 53.7°F
Nov 27 52.5°F 53.5°F 53.8°F
Nov 28 52.7°F 53.6°F 53.7°F
Nov 29 52.7°F 53.4°F 53.6°F
Nov 30 52.5°F 53.5°F 53.3°F
Dec 1 52.2°F 53.3°F 53.0°F
Dec 2 52.5°F 53.3°F 52.8°F
Dec 3 51.9°F 53.3°F 52.5°F
Dec 4 51.6°F 53.2°F 52.5°F
Dec 5 51.8°F 53.1°F 52.3°F
Dec 6 52.0°F 52.7°F 52.0°F
Dec 7 51.9°F 52.8°F 51.9°F
Dec 8 51.6°F 52.0°F 51.6°F
Dec 9 51.4°F 51.7°F 51.4°F
Dec 10 50.9°F 51.8°F 51.0°F
Dec 11 50.9°F 51.7°F 50.9°F
Dec 12 50.8°F 50.4°F 50.9°F
Dec 13 50.8°F 51.0°F 50.8°F
Dec 14 50.7°F 50.7°F 50.7°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.