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 19.18°C. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool.

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.

66.5

°F

July 22, 15:56

Trend:

stable

Yesterday:

66.5°F

Tomorrow:

66.4°F

Sunrise:

06:35

Sunset:

21:55

Day Length:

15 h. 20 min.

Saint-Nazaire in July

Minimum:

48.0°F

Average:

48.7°F

Maximum:

51.1°F

Sea water temperature in Saint-Nazaire today

As of now, in Saint-Nazaire, the water temperature is 66.5°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 0.8°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 stay about the same.

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 also aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 69.7°F on 2019, while the historical minimum was 65.4°F on 2015.

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 maximum recorded over the past years. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 66.4°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 8	66.3°F	66.1°F	66.4°F
Jul 9	64.9°F	65.7°F	66.1°F
Jul 10	66.5°F	65.2°F	66.4°F
Jul 11	67.0°F	66.1°F	66.6°F
Jul 12	68.7°F	65.4°F	66.5°F
Jul 13	69.5°F	64.8°F	66.5°F
Jul 14	68.9°F	66.1°F	66.6°F
Jul 15	68.7°F	66.1°F	66.7°F
Jul 16	68.1°F	64.6°F	66.5°F
Jul 17	69.1°F	66.3°F	67.0°F
Jul 18	67.5°F	67.0°F	67.4°F
Jul 19	67.3°F	67.2°F	67.6°F
Jul 20	67.0°F	66.3°F	67.1°F
Jul 21	66.5°F	66.6°F	67.2°F
Jul 22	66.5°F	66.2°F	67.4°F
Jul 23	66.4°F	66.0°F	67.2°F
Jul 24	66.7°F	67.4°F	67.5°F
Jul 25	66.6°F	67.0°F	67.4°F
Jul 26	66.5°F	66.5°F	67.3°F
Jul 27	66.4°F	66.2°F	67.2°F
Jul 28	66.2°F	65.9°F	67.0°F
Jul 29	66.1°F	67.6°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.