On the 29 june 2012,sighted a water snake in lake Garda,at lake Garda town,i also have a photograph.As the sun was intensely bright (40 degrees) it was difficult to get a clear image,but it is January average water temperature in Riva del Garda is 6.2°C, the minimum temperature is 3°C, and the maximum is 11°C. The swimming season in Riva del Garda lasts from June to September. During those months, Riva del Garda water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The city is located in the western part of the Venetian plain, about 20 km (12.5 mi) from Lake Garda, and has a climate similar to that of Milan. The average temperature of the coldest month (January) is of 3.2 °C (37.7 °F), that of the warmest month (July) is of 24.7 °C (76.5 °F). Here are the average temperatures. In Riva we had cool, cloudy weather and in Garda we had a lovely, warm, sunny week with temperatures sometimes reaching 30+ degrees. Being at the south of the lake you will probably have better weather than the north. Often in the summer months there can be thunderstorms but the storms are usually short-lived. The water in the lake will be If you’re looking for the very warmest time to visit Lake Garda, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally late July where highs are regularly around 84.4°F (29.1°C) with temperatures rarely dropping below 72.3°F (22.4°C) at night. Moreover, in the warmest months, the Ora del Garda reaches the inland weather station on about 80–90% of the days on which it blows on the lake's shore, after 3.5 h on average. It displays rather strong intensities, reaching average velocities of 5 m s −1 and gusts of 10 m s −1, respectively, in summer on the lake's shore and in spring at There are definitely sweet water snakes in Lake Garda. Just calmed our fourteen year old daughter who was doing back flip dives from a pontoon in San Felice. On the fifth dive a water snake rose up to stare her in the eye much to her horror! She had the resolve to kick it away and swim back to the pontoon - though her screams drew a crowd! Average water temperature in Garda lake for June The average, high, and low temperatures below should help you if you can swim in the water in Garda lake in June. 22.47° C fIwx.