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 7.75°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.

46.0

°F

January 6, 06:01

Trend:

decreasing

Yesterday:

46.2°F

Tomorrow:

45.6°F

Sunrise:

08:55

Sunset:

17:34

Day Length:

8 h. 39 min.

Saint-Nazaire in January

Minimum:

47.2°F

Average:

49.6°F

Maximum:

53.4°F

Sea water temperature in Saint-Nazaire today

As of now, in Saint-Nazaire, the water temperature is 46.0°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 3.1°F lower 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 fall a bit.

Recent sea temperature and forecast

Today's water temperature is considerably lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 51.5°F on 2016, while the historical minimum was 48.2°F on 2021.

latest data

last year

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the histoorical minimum and others when it was close to the historical maximum. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 45.7°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
Jan 1	47.2°F	48.6°F	49.6°F
Jan 2	47.6°F	49.3°F	49.8°F
Jan 3	47.0°F	49.4°F	49.6°F
Jan 4	46.5°F	49.2°F	49.5°F
Jan 5	46.2°F	48.9°F	49.2°F
Jan 6	46.0°F	49.3°F	49.0°F
Jan 7	45.6°F	48.9°F	48.7°F
Jan 8	45.8°F	48.9°F	48.8°F
Jan 9	45.8°F	48.9°F	48.8°F
Jan 10	45.8°F	48.8°F	48.9°F
Jan 11	45.7°F	48.8°F	48.8°F
Jan 12	45.6°F	48.7°F	48.7°F
Jan 13	45.6°F	48.2°F	48.7°F
Dec 23	51.8°F	50.2°F	50.2°F
Dec 24	51.9°F	50.0°F	50.2°F
Dec 25	51.4°F	49.5°F	50.1°F
Dec 26	50.4°F	49.5°F	49.9°F
Dec 27	49.2°F	47.9°F	49.6°F
Dec 28	48.8°F	48.3°F	49.5°F
Dec 29	48.3°F	48.0°F	49.3°F
Dec 30	48.3°F	48.3°F	49.2°F
Dec 31	47.7°F	46.9°F	49.1°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, 54.4°F in Spring, 66.1°F in Summer, and 60.5°F in Autumn.