Japan Hakodate Weather in August — Climate Guide
August in Hakodate is very good
Hakodate Weather in August — Quick Answer
As of 2026- Avg temp
- 26° / 20°
- Rainfall
- 140mm · 11 days
- Crowds
- Very busy
As of 2026, Hakodate in August averages a high of 26°C and low of 20°C with 140mm of rain over about 11 days. Summer light cotton — t-shirt + shorts combination. Evenings warm at 20°C / 68°F. Compact umbrella + light rain shell essential (140mm rainfall — year's peak month). Mt. Hakodate evening light jacket recommended.
August is very good for Hakodate.
August is Hakodate's peak summer month — the canonical Hakodate Port Festival in early August + Asaichi market summer seafood peak + the most reliable Mt. Hakodate viewing conditions. Daytime averages 26°C / 20°C — warm but Pacific coast breeze keeps humidity at 80% (vs Tokyo's August 87%).
Hakodate Port Festival (函館港まつり / Hakodate Minato Matsuri) is the city's largest annual event — typically the first weekend of August. Friday-night Hakodate Port Marine Fireworks Display launches approximately 10,000 fireworks over Hakodate Bay across 80 minutes. Saturday afternoon Wasshoi Hakodate Parade features 20,000+ participants performing the traditional 'Ika-odori' (squid dance, the canonical Hakodate folk dance) along Daimon-dori. Sunday closing ceremonies + smaller fireworks. Free public viewing across all events. Bay Area in front of Akarenga warehouses is the canonical fireworks viewing spot — book Bay Area hotels 3-4 months ahead for harbor-view rooms during the festival weekend.
Travel score
Hakodate Port Festival + Obon + Asaichi summer peak — annual peak season
August Weather at a Glance
August averages 79°F / 26°C highs and 68°F / 20°C lows. Pacific coastal position keeps Hakodate the coolest major Japanese city in August — significantly cooler than Tokyo (87°F / 31°C). Rainfall peaks at 140mm. Sunrise 4:35 AM, sunset 6:30 PM.
August Travel Advice
Hakodate Port Festival (first weekend of August) requires hotel booking 3-4 months ahead. Combine with Obon week (August 13-16) for the canonical Hakodate summer experience. Mt. Hakodate cable car is at year's most reliable — perfect for the night view photography.
Flying In from Overseas
Peak summer tourism globally — Korean + Taiwanese + Hong Kong + Sapporo Snow Festival countdown driving CTS direct flights. Flights from Seoul (2.5h) $500-900, Hong Kong (4.5h) $600-1,100.
August Pricing Trends
Business hotels $120-200/night, La Vista Hakodate Bay $260-450/night Port Festival weekend, Yunokawa Wakamatsu $500-800/night. Obon week +30-50% surge. USD 1 ≈ JPY 148.
Hakodate August Weather Stats
Avg High
26°C
Avg Low
20°C
Rainy Days
11
140mm total
Sunshine
6h
Daily avg
Humidity
80%
humid
UV Index
7
High
Wind
11 km/h
Gusts 22
Sea Temp
19°C
cool
Crowds
Very busy
At attractions
August Sunrise & Sunset
Air Quality
PM2.5
23 μg/m³
PM10
37 μg/m³
Status
moderate
Feels-Like Temperature & Wind
Feels like
Daytime
28°C
Nighttime
21°C
Humidity and wind affect how the actual temperature feels.
Wind
11 km/h
Max gust 22 km/h
Activities Recommended for August
August Travel Pros & Cons
Pros
- Hakodate Port Festival first weekend of August (10,000 fireworks + parade)
- Asaichi market summer scallop + crab peak quality
- Most reliable Mt. Hakodate viewing conditions (year's lowest cancellation)
- Pacific coast breeze keeps Hakodate the coolest major Japanese city in August
Cons
- Port Festival weekend hotels +50-100% surge (book 3-4 months ahead)
- Obon week (August 13-16) Japanese domestic tourism peak
- 140mm rainfall — year's peak month
- Goryokaku Tower observation peak Saturday-Sunday queue 60-90 min
August Events & Festivals
- Hakodate Port Festival (first weekend of August, 10,000 fireworks + 20,000-person Ika-odori parade)
- Obon week (August 13-16, Japanese domestic tourism peak)
- Asaichi market summer scallop + crab peak
Hakodate in August — Full Picture
August is Hakodate's peak summer month — the canonical Hakodate Port Festival in early August + Asaichi market summer seafood peak + the most reliable Mt. Hakodate viewing conditions. Daytime averages 26°C / 20°C — warm but Pacific coast breeze keeps humidity at 80% (vs Tokyo's August 87%).
Hakodate Port Festival (函館港まつり / Hakodate Minato Matsuri) is the city's largest annual event — typically the first weekend of August. Friday-night Hakodate Port Marine Fireworks Display launches approximately 10,000 fireworks over Hakodate Bay across 80 minutes. Saturday afternoon Wasshoi Hakodate Parade features 20,000+ participants performing the traditional 'Ika-odori' (squid dance, the canonical Hakodate folk dance) along Daimon-dori. Sunday closing ceremonies + smaller fireworks. Free public viewing across all events. Bay Area in front of Akarenga warehouses is the canonical fireworks viewing spot — book Bay Area hotels 3-4 months ahead for harbor-view rooms during the festival weekend.
Obon week (August 13-16) overlaps with peak summer — Japanese domestic tourism peaks. Hotel pricing surges 50-100% during Port Festival weekend + Obon week. The canonical splurge week of the year for Hakodate hotels — Wakamatsu Yunokawa kaiseki ryokan hits $600-800/night, La Vista Hakodate Bay $360-450, even budget business hotels $130-180. Book all hotels 3-4 months ahead.
What to Wear & What to Pack
Summer light cotton — t-shirt + shorts combination. Evenings warm at 20°C / 68°F. Compact umbrella + light rain shell essential (140mm rainfall — year's peak month). Mt. Hakodate evening light jacket recommended.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
11.3°C
2.7°C
9.3/mo
Summer (Jun·Jul·Aug)
Current23°C
17°C
10.7/mo
Autumn (Sep·Oct·Nov)
15.3°C
8°C
10.3/mo
Winter (Dec·Jan·Feb)
1.3°C
-5.7°C
7.7/mo
Hakodate Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 0° | -7° | 8d·70mm | 4h | 70% | 1 | Quiet | Low season | |
| 1° | -7° | 7d·60mm | 5h | 68% | 2 | Moderate | Shoulder | |
| 5° | -3° | 9d·65mm | 6h | 67% | 3 | Quiet | Low season | |
| 12° | 3° | 10d·80mm | 6h | 67% | 4 | Busy | Peak | |
| May (Best) | 17° | 8° | 9d·90mm | 7h | 70% | 5 | Very busy | Peak |
| June (Best) | 20° | 13° | 10d·80mm | 6h | 78% | 6 | Moderate | Shoulder |
| July (Best) | 23° | 18° | 11d·130mm | 5h | 80% | 7 | Busy | Peak |
| August (Best) | 26° | 20° | 11d·140mm | 6h | 80% | 7 | Very busy | Peak |
| September (Best) | 21° | 14° | 11d·130mm | 5h | 78% | 5 | Moderate | Shoulder |
| October (Best) | 16° | 8° | 10d·100mm | 5h | 73% | 3 | Busy | Peak |
| 9° | 2° | 10d·100mm | 4h | 70% | 2 | Quiet | Low season | |
| 3° | -3° | 8d·80mm | 4h | 70% | 1 | Busy | Peak |
View Other Months
Hakodate August Hotel Picks
Frequently Asked Questions
Is August a good time to visit Hakodate?
Hakodate in August is very good. Tourist crowds are very busy and flight/hotel prices are peak.
What's the average temperature in Hakodate in August?
Hakodate August averages a high of 26°C and a low of 20°C.
Does it rain much in Hakodate in August?
Hakodate August averages 140mm of rainfall over about 11 rainy days.
What should I wear in Hakodate in August?
Summer light cotton — t-shirt + shorts combination. Evenings warm at 20°C / 68°F. Compact umbrella + light rain shell essential (140mm rainfall — year's peak month). Mt. Hakodate evening light jacket recommended.
What time are sunrise and sunset in Hakodate in August?
Hakodate August sunrise is 04:35 and sunset is 18:30, with 13h 55min of daylight.
What's the air quality like in Hakodate in August?
Hakodate August air quality (AQI) averages 48, rated Good. PM2.5 averages 23μg/m³.
What activities are recommended in Hakodate in August?
In August, Hakodate is great for Hakodate Port Festival fireworks (first weekend August), Asaichi market summer seafood peak, Mt. Hakodate most reliable night view.
Is August peak season in Hakodate?
Hakodate August crowds are very busy and prices are peak. Advance reservations are strongly recommended.
Best Months to Visit Hakodate
View Other Months
Planning a August trip to Hakodate?
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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.