What is the current water temperature in Saint-Nazaire?

Q: What is the current water temperature in Saint-Nazaire?

As of now, in Saint-Nazaire, the water temperature is 12.0°C. 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.

France > Saint-Nazaire

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.

53.6

°F

March 15, 21:07

Trend:

increasing

Yesterday:

53.0°F

Tomorrow:

53.9°F

Sunrise:

07:23

Sunset:

19:14

Day Length:

11 h. 51 min.

Saint-Nazaire in March

Minimum:

47.0°F

Average:

49.6°F

Maximum:

52.8°F

Sea water temperature in Saint-Nazaire today

As of now, in Saint-Nazaire, the water temperature is 53.6°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 3.8°F higher than the average recorded on this particular day in recent years. Since yesterday, there was a slight increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to rise a bit.

Recent sea temperature and forecast

Today's water temperature is notably higher than the average recorded over the past two weeks, indicating a significant warming trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 51.1°F on 2024, while the historical minimum was 48.6°F on 2018.

latest data

last year

Observations from the last two weeks indicate that the water temperature was in proximity to the highest values recorded on those days in the past. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 54.1°F, with minimum temperature starting at 53.9°F, while the maximum might reach 54.5°F.

Daily water temperature in Saint-Nazaire

Date	Current Year actual* / forecast**	last year	10 years average
Mar 1	51.6°F	48.6°F	48.6°F
Mar 2	51.7°F	48.4°F	48.6°F
Mar 3	52.2°F	48.1°F	48.7°F
Mar 4	51.7°F	48.4°F	48.8°F
Mar 5	51.6°F	48.1°F	49.0°F
Mar 6	51.8°F	48.2°F	48.9°F
Mar 7	51.5°F	49.6°F	48.8°F
Mar 8	51.7°F	49.6°F	48.9°F
Mar 9	52.6°F	49.8°F	49.0°F
Mar 10	53.1°F	49.8°F	49.2°F
Mar 11	52.6°F	49.7°F	49.3°F
Mar 12	54.0°F	49.7°F	49.7°F
Mar 13	53.5°F	49.9°F	49.8°F
Mar 14	53.0°F	50.2°F	49.8°F
Mar 15	53.6°F	49.9°F	49.8°F
Mar 16	53.9°F	49.8°F	50.1°F
Mar 17	54.1°F	49.9°F	50.3°F
Mar 18	54.0°F	49.3°F	50.2°F
Mar 19	53.9°F	50.1°F	50.2°F
Mar 20	54.2°F	50.5°F	50.4°F
Mar 21	54.4°F	50.3°F	50.6°F
Mar 22	54.5°F	50.1°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 48.9°F in Winter, 54.5°F in Spring, 66.1°F in Summer, and 60.5°F in Autumn.