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 21.54°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.

70.8

°F

July 1, 09:20

Trend:

stable

Yesterday:

70.7°F

Tomorrow:

70.6°F

Sunrise:

06:16

Sunset:

22:09

Day Length:

15 h. 53 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 70.8°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 5.1°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 fall 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 67.4°F on 2024, while the historical minimum was 63.3°F on 2017.

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. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 70.9°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
Jun 17	67.0°F	62.2°F	63.8°F
Jun 18	67.3°F	62.2°F	63.9°F
Jun 19	67.7°F	62.4°F	64.4°F
Jun 20	66.9°F	61.8°F	64.4°F
Jun 21	68.6°F	62.5°F	64.9°F
Jun 22	69.7°F	63.4°F	65.2°F
Jun 23	68.1°F	64.3°F	65.1°F
Jun 24	68.1°F	65.1°F	65.3°F
Jun 25	67.6°F	66.1°F	65.4°F
Jun 26	68.1°F	66.7°F	65.5°F
Jun 27	69.1°F	68.8°F	65.8°F
Jun 28	69.6°F	67.9°F	65.9°F
Jun 29	70.4°F	67.7°F	66.1°F
Jun 30	70.7°F	66.6°F	65.6°F
Jul 1	70.8°F	67.4°F	65.7°F
Jul 2	70.6°F	66.5°F	65.5°F
Jul 3	70.6°F	65.9°F	65.5°F
Jul 4	70.8°F	65.6°F	65.8°F
Jul 5	71.0°F	66.7°F	66.0°F
Jul 6	70.8°F	66.8°F	65.8°F
Jul 7	71.2°F	66.3°F	66.1°F
Jul 8	71.4°F	66.1°F	66.4°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.