Latvia Riga Weather in August — Climate Guide
August in Riga is high
August is high for Riga.
August is late peak summer with Riga's warmest sea (18°C swimming) and two major cultural events. Positivus Festival (mid-August, held in Salacgrīva 1.5h north of Riga — Latvia's premier music festival, 25,000+ attendees) is the year's biggest music event. Riga City Festival (mid-late August, multi-day cultural celebration with free concerts, markets, and Old Town events) is a second peak. August 23 is also commemorated for the 1989 Baltic Way human-chain protest. Latvian crayfish (vēži) season peaks late August.
Travel score
Positivus Festival + Riga City Festival + crayfish season + warmest sea
August Weather at a Glance
August averages 70°F / 21°C highs and 55°F / 13°C lows with 80mm precipitation (year's wettest) over 11 wet days. Humidity 76%. Sunshine 9h (declining). Daylight 15.5h. Sea-temp 18°C tied with July — warmest of year. Late August feels noticeably autumnal — sunset drops from 22:00 to 20:30 across the month. Crayfish (vēži) season peaks; restaurants stock fresh dill-boiled crayfish €15-30/kg.
August Travel Advice
Positivus Festival (mid-August, Salacgrīva 1.5h bus north of Riga) — book hotels in Salacgrīva 6-8 weeks ahead OR commute from Riga (1.5h Lux Express bus or rental car); festival tickets at positivusfestival.com. Riga City Festival mid-late August has free Old Town events — check the city event calendar at liveriga.com. Light raincoat essential.
August Pricing Trends
Peak summer continues: Grand Palace $340-480/night (Positivus week minimal premium since festival is outside Riga), mid-range 4-star $170-280. Flights from major hubs $600-1,100.
Riga August Weather Stats
Avg High
21°C
Avg Low
13°C
Rainy Days
11
80mm total
Sunshine
9h
Daily avg
Humidity
76%
moderate
UV Index
4
Moderate
Wind
11 km/h
Gusts 30
Sea Temp
18°C
swimming possible (warmest)
Crowds
Very busy
At attractions
August Sunrise & Sunset
Air Quality
PM2.5
14 μg/m³
PM10
24 μg/m³
Status
good
Feels-Like Temperature & Wind
Feels like
Daytime
21°C
Nighttime
13°C
Humidity and wind affect how the actual temperature feels.
Wind
11 km/h
Max gust 30 km/h
Activities Recommended for August
August Travel Pros & Cons
Pros
- Sea-temp 18°C — warmest swimming all year at Jūrmala
- Positivus Festival mid-August (Latvia's biggest music event)
- Riga City Festival mid-late August (free Old Town events)
- Late-August crayfish (vēži) season
- All attractions still at full operation
- Latest-summer warm weather
Cons
- Hotel rates still at July peak (festival weeks sell out)
- Rain 11 days/month + variable storms
- Crayfish prices peak €15-30/kg
- Mosquitoes still active
- Late-August evening chill returns
August Events & Festivals
- Positivus Festival (mid-August, Salacgrīva, 25,000+ attendees — Latvia's biggest music festival)
- Riga City Festival (mid-late August)
- Latvia's 'White Tablecloth Day' (May 4 commemorative, repeats August 23)
- Late-August school start
Riga in August — Full Picture
August is late peak summer with Riga's warmest sea (18°C swimming) and two major cultural events. Positivus Festival (mid-August, held in Salacgrīva 1.5h north of Riga — Latvia's premier music festival, 25,000+ attendees) is the year's biggest music event. Riga City Festival (mid-late August, multi-day cultural celebration with free concerts, markets, and Old Town events) is a second peak. August 23 is also commemorated for the 1989 Baltic Way human-chain protest. Latvian crayfish (vēži) season peaks late August.
What to Wear & What to Pack
Late summer — tee + shorts daytime, light cardigan/jacket for evenings (cooling fast). SPF 30 + sunglasses. Pack a light raincoat — August has the year's highest rainfall.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
10°C
2.3°C
9.3/mo
Summer (Jun·Jul·Aug)
Current21°C
13°C
10.7/mo
Autumn (Sep·Oct·Nov)
10°C
4.7°C
12.3/mo
Winter (Dec·Jan·Feb)
-0.3°C
-5.7°C
10.7/mo
Riga Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| -1° | -7° | 11d·45mm | 1h | 87% | 0 | Quiet | Low season | |
| -1° | -7° | 9d·35mm | 2h | 84% | 1 | Quiet | Low season | |
| 4° | -3° | 10d·35mm | 4h | 78% | 2 | Quiet | Shoulder | |
| 10° | 2° | 9d·40mm | 6h | 72% | 3 | Moderate | Shoulder | |
| May (Best) | 16° | 8° | 9d·45mm | 9h | 68% | 4 | Busy | Peak |
| June (Best) | 20° | 12° | 10d·60mm | 10h | 70% | 5 | Very busy | Peak |
| July (Best) | 22° | 14° | 11d·75mm | 10h | 73% | 5 | Very busy | Peak |
| August (Best) | 21° | 13° | 11d·80mm | 9h | 76% | 4 | Very busy | Peak |
| 16° | 9° | 12d·70mm | 6h | 80% | 3 | Busy | Peak | |
| 10° | 5° | 12d·75mm | 3h | 84% | 2 | Moderate | Shoulder | |
| 4° | 0° | 13d·65mm | 1h | 88% | 1 | Moderate | Shoulder | |
| 1° | -3° | 12d·50mm | 1h | 89% | 0 | Busy | Peak |
View Other Months
Riga August Hotel Picks
Frequently Asked Questions
Is August a good time to visit Riga?
Riga in August is high. Tourist crowds are very busy and flight/hotel prices are peak.
What's the average temperature in Riga in August?
Riga August averages a high of 21°C and a low of 13°C.
Does it rain much in Riga in August?
Riga August averages 80mm of rainfall over about 11 rainy days.
What should I wear in Riga in August?
Late summer — tee + shorts daytime, light cardigan/jacket for evenings (cooling fast). SPF 30 + sunglasses. Pack a light raincoat — August has the year's highest rainfall.
What time are sunrise and sunset in Riga in August?
Riga August sunrise is 05:45 and sunset is 21:20, with 15h 35min of daylight.
What's the air quality like in Riga in August?
Riga August air quality (AQI) averages 42, rated Good. PM2.5 averages 14μg/m³.
What activities are recommended in Riga in August?
In August, Riga is great for Positivus Festival at Salacgrīva (mid-August), Riga City Festival Old Town events (mid-late August), Jūrmala beach + crayfish (vēži) season.
Is August peak season in Riga?
Riga August crowds are very busy and prices are peak. Advance reservations are strongly recommended.
Best Months to Visit Riga
View Other Months
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.