Weather in Marseille in August
France · 20-year averages, August
A good month. August is a solid month to be in Marseille. Highs average 32.6 °C, lows 19.8 °C, and rain falls on 4 days — nothing in the month is working against you.
August ranks 9 of 12 in Marseille: past the worst of the year but short of May, which is the month to book if the dates are open.
Rain falls on only 4 days, so an itinerary with no wet-weather fallback is a reasonable risk. Pack for 32.6 °C days and 19.8 °C nights; the spread matters more here than any single number.
What the averages hide
Averages flatten a month, and this one hides a few things: 7 days clear 35 °C, so a serious heatwave is normal rather than notable. Across the twenty years measured, the hottest August day reached 41 °C and the coldest night fell to 13.1 °C.
August is moderately variable: 4 mm in the driest year against 57 mm in the wettest, around an average of 21 mm. Roughly two Augusts in three land near that average, and the third does something else entirely.
Wind is light at 10.7 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 53%.
How August sits in the year
Temperatures hold steady either side: 33.2 °C in July, 32.6 here, 27.7 in September. Nothing about the timing within the month matters much.
Daylight in August
14 hours of daylight, losing 1.3 hours across the month. That is between Marseille's extremes of 15.4 and 9 hours, so days are long enough not to constrain the plan.
Sea temperature
The sea sits at about 22.3 °C in August — comfortable for a proper swim. This is the warmest the water gets all year.
How busy it gets
Shoulder. The value months — prices ease off and you get the place closer to itself.
Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.
August in Marseille versus nearby
If Marseille is one option among several, the nearby comparison is worth making. Montpellier is a better bet in August — 3 °C cooler, 1 day more rain. Nice is a better bet in August — 6.8 °C cooler, 1 day more rain.
So: August is a compromise. May is 20 points better and is what Marseille is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.
Every month in Marseille
| Month | High °C | Low °C | Rain days | Rain mm | Humidity % | Daylight h | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|
| January | 11.8 | 3.8 | 7 | 48 | 84 | 9.3 | 13.3 | 60 |
| February | 12.8 | 3.6 | 6 | 38 | 81 | 10.5 | 12.6 | 66 |
| March | 16.3 | 6.1 | 6 | 40 | 76 | 11.8 | 12.9 | 77 |
| April | 19.9 | 9.2 | 8 | 47 | 71 | 13.4 | 14.1 | 85 |
| May | 24.1 | 12.7 | 7 | 47 | 66 | 14.6 | 16.3 | 87 |
| June | 30 | 17.4 | 5 | 29 | 58 | 15.4 | 19.7 | 77 |
| July | 33.2 | 19.9 | 3 | 13 | 51 | 15.1 | 21.9 | 67 |
| August | 32.6 | 19.8 | 4 | 21 | 53 | 14 | 22.3 | 67 |
| September | 27.7 | 16.1 | 6 | 50 | 63 | 12.6 | 20.7 | 84 |
| October | 22.6 | 12.7 | 8 | 75 | 75 | 11.1 | 19 | 84 |
| November | 16.5 | 8 | 9 | 94 | 82 | 9.7 | 16.8 | 70 |
| December | 12.6 | 4.6 | 7 | 54 | 84 | 9 | 14.8 | 62 |
See all twelve months in Marseille, or where else to go in August.
Planning the rest of the trip
- Flight time to Marseille how long you are actually in the air
- Marseille time zone and the difference from home
- Days until your trip count down to the departure date