AI-generatedSaint-Nazaire at a glance
- Best time
- Jul – Aug
- Warmest month
- Aug · 23°
- Warmest sea
- Aug · 18.6°
- Sunshine a year
- 1,960 h
- Rain a year
- 707 mm
- Climate
- Maritime
- Time zone
- UTC+1 / UTC+2
- Elevation
- 12 m
Climate in Saint-Nazaire
Saint-Nazaire has a maritime climate with moderate summers and cool, often grey winters. August is the warmest month with average highs of 23 °C, while January is the coolest at 9 °C. With around 1,960 hours of sunshine a year, Saint-Nazaire is moderately sunny; July is the sunniest month with 7.9 hours a day.
Holiday weather through the year
Weather in October
Holiday weather in October
Poor
Best time to visit: July – August
Good forSightseeing & walks
A typical day in October
- Morning, 08:00: about 12°
- Midday, 13:00: about 16°
- Afternoon, 16:00: about 17°
- Evening, 20:00: about 15°
- Night, 23:00: about 14°
08:2519:23
Cool evenings: pack a jumper or a jacket.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 08:07–09:07 · evening 18:42–19:42
- Blue hour
- Morning 07:55–08:07 · evening 19:42–19:54
Golden hour: the sun between 4° below and 6° above the horizon; blue hour: 6° to 4° below it. Times for the 15th of the month; mountains and clouds shift the light.
What is the weather like in Saint-Nazaire in October?
In October, Saint-Nazaire is mild: daytime highs average 17 °C, and nights cool down to about 12 °C. The sea averages 16.0 °C – swimming is only for the hardy. Expect around 4 hours of sunshine a day. Rain is frequent, with about 12 rainy days and 79 mm in total. All in all, October is not an ideal month for a holiday in Saint-Nazaire.
More details for October
- Daylight
- 10 h 58 min08:25 – 19:23
- UV index
- 3 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 23 km/haverage daily peakAll months
- Cloud cover
- 65 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC+2Europe/Paris
How the score comes together
- Temperatureweight 35 %0 %
- Seaweight 25 %0 %
- Sunshineweight 20 %18 %
- Few rainy daysweight 20 %45 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in October
- A jumper for the evenings
- Rain jacket or umbrella
Sea temperature in Saint-Nazaire
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 15.1 – 17.1 °C
Swimming season: Never above 20 °C
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Saint-Nazaire ranges from 9.1 °C in February to 18.6 °C in August. Even at its warmest the sea stays below 20 °C, so swimming is bracing at best.
From November to January the sea is even warmer than the afternoon air. The sea temperature varies from year to year: in August, eight out of ten years were between 17.5 and 19.6 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 9.4° | 8.2° | 10.4° | cold |
| FebruaryFeb | 9.1° | 8.1° | 10.1° | cold |
| MarchMar | 10.0° | 8.9° | 10.9° | cold |
| AprilApr | 12.0° | 11.3° | 13.2° | cold |
| MayMay | 14.4° | 13.4° | 15.8° | cold |
| JuneJun | 16.9° | 16.0° | 18.2° | cold |
| JulyJul | 18.2° | 17.0° | 19.0° | fresh |
| AugustAug | 18.6° | 17.5° | 19.6° | fresh |
| SeptemberSep | 17.6° | 16.3° | 18.9° | fresh |
| OctoberOct | 16.0° | 15.1° | 17.1° | cold |
| NovemberNov | 13.7° | 12.9° | 14.7° | cold |
| DecemberDec | 10.8° | 10.0° | 12.1° | cold |
Sunshine hours in Saint-Nazaire
Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.
In October, the sun shines for about 4.1 of 11.0 hours of daylight in Saint-Nazaire, 37 % of the day.
Sunshine hours: estimated from radiation data (ERA5, 1996–2025) and calibrated against measured station values; no weather station is close enough here. Daylight is the time from sunrise to sunset on the 15th of the month.
UV index in Saint-Nazaire
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 3 · moderateAround midday seek shade; use sunscreen, a hat and sunglasses.
The sun is strongest in June (UV 8).
Minutes until sunburn in October
- Very fair skin
- about 50 min
- Fair skin
- about 65 min
- Light brown skin
- about 90 min
- Olive skin
- about 115 min
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen it, water, sand and snow shorten it. Sunscreen extends the time only partly.
Monthly values: clear-sky noon estimate from the sun's angle, ozone and altitude. UV today: Open-Meteo forecast.
Rain in Saint-Nazaire: rainy days and rainfall
A rainy day is a day with at least 1 mm of rain or snow; the amount is what falls in the whole month. Tap a month to select it.
In October, Saint-Nazaire has about 12 rainy days with 79 mm of rain in total.
Wind and clouds in Saint-Nazaire
How breezy and how cloudy Saint-Nazaire is through the year. Tap a month to select it on the whole page.
Wind
Typical daily peak of the wind in km/h: what the afternoon breeze usually reaches, not the gusts.
In October, the wind in Saint-Nazaire typically peaks at 23 km/h during the day: Beaufort 4, moderate breeze.
Breezy months for windsurfing and kiting
From Beaufort 4 (20 km/h) the daily breeze is usually enough for windsurfing and often for kiting, and here it gets there all year.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 65 % of the sky over Saint-Nazaire: mostly cloudy, with about 4.1 hours of sunshine a day.
Wind: mean daily maximum of the hourly wind 10 m above ground (ERA5, 1996–2025). Gusts are stronger, and the model grid of about 28 km smooths out local effects such as capes and valley winds. Clouds: mean total cloud cover of all layers over day and night (ERA5, 1996–2025). Thin high cloud counts as cover even when the sun still shines through.
Heat and humidity in Saint-Nazaire
How often the day gets hot in Saint-Nazaire (30 °C and more), and in which months heat and humidity come together. Tap a month to select it.
Heat calendar
- pleasant
- some hot or muggy days
- often muggy
- often hot
- hot and muggy
In October, Saint-Nazaire has about 0 hot days, with an average daytime high of 17 °C: pleasant. Heat plays no part this month.
Hot days reach at least 30 °C; a month counts as muggy when the mean dew point reaches 18 °C on at least 15 days. Averages from ERA5 and ERA5-Land, 1996–2025. Muggy nights through the year
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Saint-Nazaire
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Cold 0–8°
- Cool 8–15°
- Pleasant 15–20°
CoolOctober: nights around 12°. A duvet at night and a jumper for the evening.
The coolest nights are in January (5°), the warmest in August (16°). Nights are pleasant for sleeping (15 to 20 °C) from June to August. Nights fall below 8 °C on average from December to March, so the room should be heated.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sea | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|---|
| JanuaryJan | 9 | 9° | 5° | 9.4° | 2.5 h | 12 | 74 |
| FebruaryFeb | 15 | 10° | 5° | 9.1° | 3.7 h | 9 | 55 |
| MarchMar | 17 | 12° | 6° | 10.0° | 4.9 h | 11 | 55 |
| AprilApr | 23 | 15° | 8° | 12.0° | 6.4 h | 10 | 52 |
| MayMay | 25 | 18° | 11° | 14.4° | 7.1 h | 10 | 54 |
| JuneJun | 40 | 21° | 15° | 16.9° | 7.7 h | 9 | 43 |
| JulyJul | 55 | 22° | 16° | 18.2° | 7.9 h | 8 | 44 |
| AugustAug | 57 | 23° | 16° | 18.6° | 7.7 h | 8 | 44 |
| SeptemberSep | 39 | 21° | 14° | 17.6° | 6.8 h | 8 | 44 |
| OctoberOct | 13 | 17° | 12° | 16.0° | 4.1 h | 12 | 79 |
| NovemberNov | 8 | 13° | 8° | 13.7° | 3.1 h | 12 | 81 |
| DecemberDec | 7 | 10° | 6° | 10.8° | 2.5 h | 13 | 83 |
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences
47.28° N, 2.22° W · 12 m · Europe/Paris
Best time to visit Saint-Nazaire
The best time to visit Saint-Nazaire is from July to August. The sea stays too cool for a classic beach holiday: even in August it only reaches 18.6 °C. For sightseeing, day trips and hiking, conditions are most comfortable from May to October. Rain is most frequent from November to December; the wettest month is December with 83 mm.
Saint-Nazaire through the seasons
How the weather changes over the seasons, with averages for each.
Saint-Nazaire in spring
Mar – May
Poor
- 12–18 °C by day
- Sea 12 °C
- 6 h of sun a day
- 31 rainy days in all
Saint-Nazaire in summer
Jun – Aug
Fair
- 21–23 °C by day
- Sea 18 °C
- 8 h of sun a day
- 25 rainy days in all
Saint-Nazaire in autumn
Sep – Nov
Poor
- 13–21 °C by day
- Sea 16 °C
- 5 h of sun a day
- 32 rainy days in all
Saint-Nazaire in winter
Dec – Feb
Poor
- 9–10 °C by day
- Sea 10 °C
- 3 h of sun a day
- 34 rainy days in all
Find your perfect month
Tell us what you like and we rate every month in Saint-Nazaire for you.
Your best months: July – August
Based on the climate averages; tap a month to see its details.
Compare two months in Saint-Nazaire
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
August has the better holiday weather in Saint-Nazaire: score 57 against 13. In August, days are 6 °C warmer than in October. The sea is 3 °C warmer in August. August has 4 fewer rainy days. The sun shines 4 hours longer a day in August.
| Month | October | August |
|---|---|---|
| Weather score | 13 | 57better |
| Day high | 17° | 23° |
| Night low | 12° | 16° |
| Sea | 16.0° | 18.6° |
| Sunshine | 4.1 h | 7.7 hbetter |
| Rainy days | 12 | 8better |
| Rainfall | 79 mm | 44 mmbetter |
| Muggy days | 0better | 2 |
Based on the climate averages 1996–2025.
Which month for what?
Beach & swimming
No month
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
May – Oct
15–28 °C and not too much rain
Rainy months
Nov – Dec
12 or more rainy days
Saint-Nazaire month by month
The typical weather for every month at a glance.
9January9° · Sea 9° · 3 h
In January, Saint-Nazaire is cold: daytime highs average 9 °C, and nights cool down to about 5 °C. The sea averages 9.4 °C – swimming is only for the hardy. The sun is scarce, with only about 3 hours a day. Rain is frequent, with about 12 rainy days and 74 mm in total. All in all, January is not an ideal month for a holiday in Saint-Nazaire.
Saint-Nazaire in January15February10° · Sea 9° · 4 h
In February, Saint-Nazaire is cold: daytime highs average 10 °C, and nights cool down to about 5 °C. The sea averages 9.1 °C – swimming is only for the hardy. The sun is scarce, with only about 4 hours a day. Rain is frequent, with about 9 rainy days and 55 mm in total. All in all, February is not an ideal month for a holiday in Saint-Nazaire.
Saint-Nazaire in February17March12° · Sea 10° · 5 h
In March, Saint-Nazaire is cool: daytime highs average 12 °C, and nights cool down to about 6 °C. The sea averages 10.0 °C – swimming is only for the hardy. Expect around 5 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 55 mm in total. All in all, March is not an ideal month for a holiday in Saint-Nazaire.
Saint-Nazaire in March23April15° · Sea 12° · 6 h
In April, Saint-Nazaire is cool: daytime highs average 15 °C, and nights cool down to about 8 °C. The sea averages 12.0 °C – swimming is only for the hardy. Expect around 6 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 52 mm in total. All in all, April is not an ideal month for a holiday in Saint-Nazaire.
Saint-Nazaire in April25May18° · Sea 14° · 7 h
In May, Saint-Nazaire is mild: daytime highs average 18 °C, and nights cool down to about 11 °C. The sea averages 14.4 °C – swimming is only for the hardy. The sun shines for around 7 hours a day. Rain is frequent, with about 10 rainy days and 54 mm in total. All in all, May is not an ideal month for a holiday in Saint-Nazaire.
Saint-Nazaire in May40June21° · Sea 17° · 8 h
In June, Saint-Nazaire is warm: daytime highs average 21 °C, and nights cool down to about 15 °C. The sea averages 16.9 °C – swimming is only for the hardy. The sun shines for around 8 hours a day. Rain falls on about 9 days, adding up to 43 mm. All in all, June is a so-so month for a holiday in Saint-Nazaire.
Saint-Nazaire in June55July22° · Sea 18° · 8 h
In July, Saint-Nazaire is warm: daytime highs average 22 °C, and nights cool down to about 16 °C. The sea averages 18.2 °C – bracing, so a wetsuit helps for longer swims. The sun shines for around 8 hours a day. Rain falls on about 8 days, adding up to 44 mm. All in all, July is a so-so month for a holiday in Saint-Nazaire.
Saint-Nazaire in July57August23° · Sea 19° · 8 h
In August, Saint-Nazaire is warm: daytime highs average 23 °C, and nights cool down to about 16 °C. The sea averages 18.6 °C – bracing, so a wetsuit helps for longer swims. The sun shines for around 8 hours a day. Rain falls on about 8 days, adding up to 44 mm. All in all, August is a so-so month for a holiday in Saint-Nazaire.
Saint-Nazaire in August39September21° · Sea 18° · 7 h
In September, Saint-Nazaire is mild: daytime highs average 21 °C, and nights cool down to about 14 °C. The sea averages 17.6 °C – bracing, so a wetsuit helps for longer swims. The sun shines for around 7 hours a day. Rain falls on about 8 days, adding up to 44 mm. All in all, September is not an ideal month for a holiday in Saint-Nazaire.
Saint-Nazaire in September13October17° · Sea 16° · 4 h
In October, Saint-Nazaire is mild: daytime highs average 17 °C, and nights cool down to about 12 °C. The sea averages 16.0 °C – swimming is only for the hardy. Expect around 4 hours of sunshine a day. Rain is frequent, with about 12 rainy days and 79 mm in total. All in all, October is not an ideal month for a holiday in Saint-Nazaire.
Saint-Nazaire in October8November13° · Sea 14° · 3 h
In November, Saint-Nazaire is cool: daytime highs average 13 °C, and nights cool down to about 8 °C. The sea averages 13.7 °C – swimming is only for the hardy. The sun is scarce, with only about 3 hours a day. Rain is frequent, with about 12 rainy days and 81 mm in total. All in all, November is not an ideal month for a holiday in Saint-Nazaire.
Saint-Nazaire in November7December10° · Sea 11° · 3 h
In December, Saint-Nazaire is cold: daytime highs average 10 °C, and nights cool down to about 6 °C. The sea averages 10.8 °C – swimming is only for the hardy. The sun is scarce, with only about 3 hours a day. Rain is frequent, with about 13 rainy days and 83 mm in total. All in all, December is not an ideal month for a holiday in Saint-Nazaire.
Saint-Nazaire in DecemberSaint-Nazaire compared
Put Saint-Nazaire side by side with another destination.
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Saint-Nazaire vs. Nantes
In October the holiday weather in Saint-Nazaire and Nantes is about equally good (score 13 vs. 12). During the day it is about as warm in Nantes as in Saint-Nazaire.
| in October | Saint-Nazaire | Nantes |
|---|---|---|
| Holiday score | 13 | 12 |
| Daytime high | 17° | 17° |
| Sea | 16° | – |
| Sunshine | 4 h | 4 h |
| Rainy days | 12 | 12 |
| Best time | Jul – Aug | May – Sep |
Through the year
France in October: the best places
In October, Saint-Nazaire ranks 21 among the 31 nearest destinations in this country.
- Bordeaux20°18°72
- 2Poitiers18°66
- 3Oradour-sur-Glane17°66
- 4Angers17°65
- 5Tours18°65
- 6Nantes17°63
- 7Orléans17°62
- 8Le Mans17°60
- 21Saint-NazaireThis page17°16°13
Planning a trip to Saint-Nazaire
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Saint-Nazaire in the school holidays
How the weather suits the usual holiday periods. Dates vary by school and region, so each holiday uses the months it usually falls in.
Saint-Nazaire has its best school-holiday weather during the summer holidays (score 56) and its weakest during the Christmas holidays (score 8).
- 21
Easter holidays
Mar – Apr
Poor
- 14 °C by day
- Sea 11 °C
- 5.9 h of sun a day
- 10 rainy days a month
- 28
May half-term
May – Jun
Poor
- 18 °C by day
- Sea 15 °C
- 7.2 h of sun a day
- 10 rainy days a month
Good for: Sightseeing & walks
- 56
Summer holidays
Jul – Aug
FairBest holidays
- 23 °C by day
- Sea 18 °C
- 7.8 h of sun a day
- 8 rainy days a month
Good for: Sightseeing & walks
- 13
October half-term
Oct
Poor
- 17 °C by day
- Sea 16 °C
- 4.1 h of sun a day
- 12 rainy days a month
Good for: Sightseeing & walks
- 8
Christmas holidays
Dec – Jan
Poor
- 9 °C by day
- Sea 10 °C
- 2.5 h of sun a day
- 12 rainy days a month
Keep in mind: Frequent rain
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- Short trip – train or car is often quicker
- Distance
- 480 km
- Time zone
- UTC+2
- Jet lag
- Hardly any (under 3 h)
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Frequently asked questions about Saint-Nazaire
When is the best time to visit Saint-Nazaire?
The best time to visit Saint-Nazaire is from July to August. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in Saint-Nazaire?
The sea temperature in Saint-Nazaire ranges from 9.1 °C in February to 18.6 °C in August. Even at its warmest the sea stays below 20 °C, so swimming is bracing at best.
Can you swim in Saint-Nazaire in October?
Only if you don't mind cold water: in October the sea averages just 16.0 °C. Comfortable swimming temperatures are not reached at any time of year.
What is the warmest month in Saint-Nazaire?
August is the warmest month, with average highs of 23 °C and nights around 16 °C. January is the coolest month at 9 °C.
When does it rain most in Saint-Nazaire?
Rain is most frequent from November to December; the wettest month is December with 83 mm. The driest month is June with 43 mm.
How many hours of sunshine does Saint-Nazaire get?
Saint-Nazaire gets around 1,960 hours of sunshine a year. The sunniest month is July with 7.9 hours a day; in January there are 2.5 hours a day.
What time zone is Saint-Nazaire in?
Saint-Nazaire uses the time zone Europe/Paris: UTC+1 in January and UTC+2 in July.
Which school holidays are best for Saint-Nazaire?
Saint-Nazaire has its best school-holiday weather during the summer holidays (score 56) and its weakest during the Christmas holidays (score 8). Holiday ratings (0–100): Easter holidays 21, May half-term 28, Summer holidays 56, October half-term 13, Christmas holidays 8.
Near Saint-Nazaire
Other destinations close by.
Places with a climate like Saint-Nazaire
Destinations whose weather through the year is closest to Saint-Nazaire's – good alternatives.