Mediterranean Sea Temperatures Rise, Ideal for Water Activities

After a cooler end to September, the Mediterranean Sea is finally experiencing more summery temperatures. Due to a return of warm weather and calmer seas, the eastern part of the basin is seeing particularly high temperatures, sometimes exceeding 27°C. On the western side, temperatures are slowly rising, although the mistral and tramontane winds will still be present early in the week.

A water temperature of 22°C is comfortable for most swimmers, even without a wetsuit. These temperatures are forecast for the first week of August 2025.

Weather Explanation

The Azores High is regaining control over southern France this week, bringing a noticeable increase in air temperatures and more stable weather. While a final disturbance may affect the north of the country on Tuesday, the south will experience summer conditions from Monday, with calmer seas and plenty of sunshine. The mistral and tramontane winds will blow intermittently until Wednesday, but not as strongly as in previous episodes. As a result, upwelling is weakening, allowing the water temperature to rise, especially along the coasts of Provence and Languedoc.

Recommended Water Activities

The week looks ideal for water activities, with water temperatures exceeding 25°C on the French Riviera and in Corsica. Paddleboarding, diving, sailing, and swimming will be popular.

Regional Water Temperatures and Activity Centers

Pyrénées Orientales (66)

Water Temperature: Around 23.6 degrees Celsius on average for the first week, compared to a seasonal average of 20.7°C.

Open Activity Centers in August:

• Sailor Wake Park, water ski club in Argelès-sur-Mer (66700).
• Olixkite School, surf school in Canet en Roussillon (66140)
• Esprit Voile 66, sailing school in Saint-Cyprien (66750)

Aude (11)

Water Temperature: Around 21.8 degrees Celsius on average for the first week, compared to a seasonal average of 20.7°C.

Open Activity Centers in August:

• Kite & Foil, Kitesurf and WingFoil school in Guissan (11430)
• L’Horizon Bleu, fishing and freediving school in Leucate (11370)

Hérault (34)

Water Temperature: Around 21.8 degrees Celsius on average for the first week, compared to a seasonal average of 20.9°C.

Open Activity Centers in August:

• MCK, kayak rental in Montpellier (34000)
• Bulles Plongée, diving school in Palavas-les-Flots (34250)
• TKC, Kite, Wing and Windfoil club in Sète (34200)

Gard (30)

Water Temperature: Around 22 degrees Celsius on average for the first week, compared to a seasonal average of 21.1°C.

Open Activity Centers in August:

• Latitude43, sailing club in Le-Grau-du-Roi (30240)
• Club 30 Kite, Kitesurf school in Le-Grau-du-Roi (30240)

Bouches-du-Rhône (13)

Water Temperature: Around 22 degrees Celsius on average for the first week, below the seasonal average of 21.9°C.

Open Activity Centers in August:

• Plongée Tek, diving school in Marseille (13000)
• Cassis kayak, kayak rental in Cassis (13260)
• Hot School, Kite school in Martigues (13500)

Var (83)

Water Temperature: Around 25.4 degrees Celsius on average for the first week, compared to a seasonal average of 22.9°C.

Open Activity Centers in August:

• Ecole WIng & Kite, in Giens (83440)
• Ketos Aventure, diving school in Sainte-Maxime (83120)

Alpes-Maritimes (06)

Water Temperature: Around 27 degrees Celsius on average for the first week, compared to a seasonal average of 23.7°C.

Open Activity Centers in August:

• Water free Gliss, Wakesurf, wakeboard and towed buoy center in Saint-laurent-du-var (06700)
• Passion Scuba Diving, diving school in Saint-laurent-du-var (06700)

Haute-Corse (2B)

Water Temperature: Around 27.4 degrees Celsius on average for the first week, compared to 24.1°C for the seasonal average.

Open Activity Centers in August:

• Calvi Nautique Club, sailing school in Calvi (20260)
• Diving Corsica, diving center in Lumio (20260)

Corse-du-Sud (2A)

Water Temperature: Around 26.4 degrees Celsius on average for the first week, compared to a seasonal average of 23.9°C.

Open Activity Centers in August:

• Ecole Figari, Kitesurf, Wingfoil and Windsurf center in FIgari (20114)
• Aqualoisirs, nautical center in Propriano (20110)

With the return of a strong high-pressure system, the contrasts between the east and west of the Mediterranean are gradually fading. While the mistral and tramontane winds will still blow early in the week, temperatures are rising sharply, especially from Thursday, when the entire coastline should experience warmer and more pleasant water for summer swimming.

Remember to check the latest marine forecasts to ensure favorable sea conditions.

---

Enjoyed this post by Thibault Helle? Subscribe for more insights and updates straight from the source.