Lake Brienz
Lake Brienz is a Swiss lake (Bern) at 564 m, covering 30 km² with a maximum depth of 260 m. Typical winds: Föhn, Westwind. Main shores and access points: Brienz, Bönigen, Iseltwald, Ringgenberg, Interlaken, Giessbach. The weather above is computed over the middle of the lake; the “Wind on the lake” section details hourly speed, gusts and direction — for sailing, windsurfing, paddling, fishing or swimming.
Climate of Lake Brienz: 1991–2020 normals
In Lake Brienz (564 m), the mean annual temperature is 9.4 °C. The warmest month is July (18.3 °C on average) and the coldest January (0.5 °C). About 1221 mm of precipitation falls per year, peaking in August (154 mm) with a minimum in February (68 mm). The sun shines for about 1626 hours a year, mostly in July (223 h). On average there are 95 frost days and 7 hot days (≥ 30 °C) per year. The mean monthly maximum reaches 30.5 °C and the absolute minimum −9.5 °C.
Mean monthly precipitation (mm) — bar height relative to the wettest month.
| Month | Mean T | Abs. max | Abs. min | Precip. (mm) | Sunshine (h) | Frost days | Summer days |
|---|---|---|---|---|---|---|---|
| Jan | 0.5 °C | 11.8 °C | −9.5 °C | 74 | 67 | 24 | 0 |
| Feb | 1.4 °C | 13.4 °C | −9.0 °C | 68 | 82 | 21 | 0 |
| Mar | 5.3 °C | 18.3 °C | −5.5 °C | 76 | 129 | 12 | 0 |
| Apr | 9.1 °C | 22.0 °C | −1.7 °C | 84 | 164 | 3 | 0 |
| May | 13.1 °C | 26.2 °C | 2.5 °C | 126 | 183 | 0 | 4 |
| Jun | 16.6 °C | 29.7 °C | 6.6 °C | 132 | 200 | 0 | 10 |
| Jul | 18.3 °C | 30.5 °C | 9.1 °C | 150 | 223 | 0 | 15 |
| Aug | 17.9 °C | 29.9 °C | 8.3 °C | 154 | 199 | 0 | 13 |
| Sep | 14.2 °C | 25.2 °C | 4.7 °C | 98 | 152 | 0 | 3 |
| Oct | 10.0 °C | 21.1 °C | 0.1 °C | 83 | 103 | 1 | 0 |
| Nov | 4.8 °C | 16.7 °C | −5.0 °C | 84 | 68 | 11 | 0 |
| Dec | 1.3 °C | 12.2 °C | −8.7 °C | 92 | 56 | 22 | 0 |
| Year | 9.4 °C | 30.5 °C | −9.5 °C | 1221 | 1626 | 95 | 45 |
Source: MeteoSwiss open data (1991–2020 normals) — stations Interlaken (10 km, 578 m), Meiringen (15 km, 589 m), Jungfraujoch (20 km, 3571 m), adjusted to the elevation of Lake Brienz (564 m) using a 0.55 °C/100 m lapse rate. Indicative, rounded values.
Swiss lakes
- Weather Lake Lungern (16 km · 689 m)
- Weather Lake Thun (20 km · 558 m)
- Weather Lake Sarnen (25 km · 469 m)
- Weather Lake Oeschinen (31 km · 1578 m)
- Weather Blausee (32 km · 887 m)
- Weather Lake Lucerne (47 km · 434 m)
Nearby municipalities
- Weather Iseltwald (3 km)
- Weather Niederried bei Interlaken (3 km)
- Weather Oberried am Brienzersee (4 km)
- Weather Brienz (BE) (5 km)
- Weather Habkern (7 km)
- Weather Bönigen (7 km)
- Weather Schwanden bei Brienz (8 km)
- Weather Ringgenberg (BE) (8 km)
Frequently asked questions about the weather: Lake Brienz
What is the wind like on Lake Brienz today?
The “Wind on the lake” section shows hourly average wind speed, gusts and direction for the next 24 hours, computed over the lake (564 m).
Can you swim in Lake Brienz?
In summer (June to September) lowland lakes usually reach 18–24 °C at the surface; there are many public beaches and lidos. Check the air temperature, sunshine and UV index above to pick your slot.
What are the typical winds on Lake Brienz?
Characteristic winds: Föhn, Westwind. Storm warnings on Swiss lakes are signalled by flashing lights (40 flashes/min = caution, 90 = storm).
What is the warmest month in Lake Brienz?
The warmest month in Lake Brienz is July, averaging 18.3 °C (1991–2020 normal). The coldest is January at 0.5 °C.
How much does it rain in Lake Brienz per year?
Lake Brienz receives about 1221 mm of precipitation a year. The wettest month is August (154 mm), the driest February (68 mm).
When is the best time to visit Lake Brienz?
For warmth and sunshine: July (18.3 °C on average, 223 h of sun). The coldest month is January (0.5 °C). Check the 15-day forecast above for your dates.