Switzerland Interlaken Weather in August — Climate Guide
August in Interlaken is very-high
Interlaken Weather in August — Quick Answer
As of 2026- Avg temp
- 24° / 12°
- Rainfall
- 130mm · 13 days
- Crowds
- Very busy
As of 2026, Interlaken in August averages a high of 24°C and low of 12°C with 130mm of rain over about 13 days. Like July. Peak summer.
August is very-high for Interlaken.
Swiss National Day Aug 1 — fireworks over Lake Brienz from boat. European summer holidays. Hotels at peak.
Travel score
Interlaken August Weather Stats
Avg High
24°C
Avg Low
12°C
Rainy Days
13
130mm total
Sunshine
7h
Daily avg
Humidity
75%
moderate
UV Index
8
Very high
Wind
7 km/h
Gusts 18
Sea Temp
17°C
lake swimming peak
Crowds
Very busy
At attractions
August Sunrise & Sunset
Air Quality
PM2.5
10 μg/m³
PM10
18 μg/m³
Status
good
Feels-Like Temperature & Wind
Feels like
Daytime
24°C
Nighttime
12°C
Humidity and wind affect how the actual temperature feels.
Wind
7 km/h
Max gust 18 km/h
Activities Recommended for August
August Travel Pros & Cons
Pros
- Swiss National Day Aug 1
- Lake swimming peak
- All mountains accessible
- Long days
Cons
- Hotels at peak
- Tourist crush peak
- Jungfraujoch packed
August Events & Festivals
- Swiss National Day Aug 1
- Peak summer continues
Interlaken in August — Full Picture
Swiss National Day Aug 1 — fireworks over Lake Brienz from boat. European summer holidays. Hotels at peak.
What to Wear & What to Pack
Like July. Peak summer.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
14°C
4.3°C
12.7/mo
Summer (Jun·Jul·Aug)
Current23.7°C
12°C
13/mo
Autumn (Sep·Oct·Nov)
13.7°C
5°C
11/mo
Winter (Dec·Jan·Feb)
4°C
-2.3°C
9.7/mo
Interlaken Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 3° | -3° | 10d·75mm | 3h | 80% | 1 | Busy | Peak | |
| 5° | -2° | 9d·65mm | 4h | 78% | 2 | Busy | Peak | |
| 10° | 1° | 11d·80mm | 5h | 75% | 3 | Moderate | Shoulder | |
| 14° | 4° | 13d·100mm | 6h | 73% | 5 | Quiet | Low season | |
| 18° | 8° | 14d·130mm | 7h | 70% | 6 | Moderate | Shoulder | |
| June (Best) | 22° | 11° | 14d·140mm | 7h | 72% | 8 | Busy | Peak |
| July (Best) | 25° | 13° | 12d·130mm | 8h | 72% | 9 | Very busy | Peak |
| August (Best) | 24° | 12° | 13d·130mm | 7h | 75% | 8 | Very busy | Peak |
| September (Best) | 20° | 10° | 11d·100mm | 6h | 78% | 6 | Busy | Peak |
| 14° | 5° | 10d·85mm | 5h | 80% | 4 | Moderate | Shoulder | |
| 7° | 0° | 12d·100mm | 3h | 80% | 2 | Quiet | Low season | |
| 4° | -2° | 10d·75mm | 3h | 80% | 1 | Busy | Peak |
View Other Months
Interlaken August Hotel Picks
Frequently Asked Questions
Is August a good time to visit Interlaken?
Interlaken in August is very-high. Tourist crowds are very busy and flight/hotel prices are peak.
What's the average temperature in Interlaken in August?
Interlaken August averages a high of 24°C and a low of 12°C.
Does it rain much in Interlaken in August?
Interlaken August averages 130mm of rainfall over about 13 rainy days.
What should I wear in Interlaken in August?
Like July. Peak summer.
What time are sunrise and sunset in Interlaken in August?
Interlaken August sunrise is 06:15 and sunset is 21:00, with 14h 45min of daylight.
What's the air quality like in Interlaken in August?
Interlaken August air quality (AQI) averages 30, rated Good. PM2.5 averages 10μg/m³.
What activities are recommended in Interlaken in August?
In August, Interlaken is great for Swiss National Day fireworks, Jungfraujoch, Lake Brienz cruise.
Is August peak season in Interlaken?
Interlaken August crowds are very busy and prices are peak. Advance reservations are strongly recommended.
Best Months to Visit Interlaken
View Other Months
Planning a August trip to Interlaken?
You've checked the weather — next come the budget and the route.
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.