Last updated July 12, 2026 · Editorial policy
Most “best summer destinations” lists are vibes. This one is ranked by five years of actual climate data: we scored all 94 destinations in our open travel climate dataset (ERA5 reanalysis, 2019–2023) on June–August daytime temperatures and rainy days, and kept the top 20 — capped at two entries per country. Cool escapes and dry-season winners rank alongside classic beach heat, because a great summer trip is about reliable weather, not just hot weather.
The 20 best summer vacation destinations, by the numbers
1. Peru
June–August: 19°C days / 14°C nights · ~0 rainy days a month (ERA5 2019–2023). Lima’s coastal winter is one of the driest, mildest big-city climates on Earth in these months — and it’s peak dry season for Cusco and the Machu Picchu treks too. When to visit →
2. Santorini
June–August: 28°C days / 23°C nights · ~1 rainy day a month (ERA5 2019–2023). The Aegean at its most reliable: hot days, warm nights, and rain that essentially doesn’t happen.
3. Portugal
June–August: 27°C days / 17°C nights · ~2 rainy days a month (ERA5 2019–2023). The Atlantic keeps Portugal noticeably cooler than the central Mediterranean — proper summer without the furnace. When to visit →
4. Lisbon
June–August: 27°C days / 18°C nights · ~2 rainy days a month (ERA5 2019–2023). City breaks in the high 20s with ocean breeze; evenings stay comfortable for terrace dinners. When to visit →
5. South Africa
June–August: 18°C days / 5°C nights · ~1 rainy day a month (ERA5 2019–2023). Southern-hemisphere winter means crisp, dry days — which is exactly why June–August is prime safari season: thin bush and animals at the waterholes. When to visit →
6. Cusco
June–August: 18°C days / 5°C nights · ~3 rainy days a month (ERA5 2019–2023). Cool, dry and clear — the Andes’ trekking window. Pack layers for cold nights. When to visit →
7. Cappadocia
June–August: 28°C days / 14°C nights · ~4 rainy days a month (ERA5 2019–2023). Hot afternoons, cool nights, and calm clear mornings — the pattern the balloon flights depend on. When to visit →
8. Turkey
June–August: 28°C days / 20°C nights · ~5 rainy days a month (ERA5 2019–2023). Istanbul runs warm and mostly dry; the Aegean and Mediterranean coasts run hotter still. When to visit →
9. Barcelona
June–August: 28°C days / 21°C nights · ~6 rainy days a month (ERA5 2019–2023). Beach-and-city summer in the high 20s; expect the occasional brief storm, not washouts. When to visit →
10. Fiji
June–August: 28°C days / 21°C nights · ~6 rainy days a month (ERA5 2019–2023). This is Fiji’s dry season — the tropical winter brings lower humidity and the year’s most dependable sunshine.
11. Hawaii
June–August: 29°C days / 23°C nights · ~7 rainy days a month (ERA5 2019–2023). Steady trade winds keep the heat honest; showers pass quickly on the windward sides.
12. Vancouver
June–August: 21°C days / 14°C nights · ~8 rainy days a month (ERA5 2019–2023). The famous dry window: after a wet year, summer Vancouver turns sunny, mild and spectacular. When to visit →
13. Croatia
June–August: 30°C days / 21°C nights · ~4 rainy days a month (ERA5 2019–2023). Peak Adriatic: hot, dry, and made for island-hopping — book ferries and rooms ahead. When to visit →
14. Jordan
June–August: 33°C days / 20°C nights · ~0 rainy days a month (ERA5 2019–2023). Hot, yes — but essentially zero rain, and desert evenings cool off fast. Petra at dawn beats Petra at noon. When to visit →
15. Maui
June–August: 26°C days / 19°C nights · ~9 rainy days a month (ERA5 2019–2023). A touch cooler and greener than Oahu’s leeward side; upcountry mornings are genuinely fresh. When to visit →
16. Brazil
June–August: 25°C days / 18°C nights · ~9 rainy days a month (ERA5 2019–2023). Rio’s winter is mild and much drier than its summer — clear views from the peaks without the steam. When to visit →
17. Albania
June–August: 31°C days / 20°C nights · ~5 rainy days a month (ERA5 2019–2023). The budget Mediterranean: Riviera heat and long beach days at a fraction of Italian prices. When to visit →
18. Paris
June–August: 25°C days / 15°C nights · ~10 rainy days a month (ERA5 2019–2023). Long daylight, mild temperatures — the city’s best walking weather, with parks in full swing. When to visit →
19. Sydney
June–August: 18°C days / 8°C nights · ~9 rainy days a month (ERA5 2019–2023). Southern winter: crisp, often brilliantly clear days in the high teens — city and coast walks over beach days.
20. Mallorca
June–August: 32°C days / 22°C nights · ~4 rainy days a month (ERA5 2019–2023). The hottest pick on this list — classic Balearic beach summer; seek shade at midday. When to visit →
How this ranking works
Each destination-month gets a comfort score from 100, with penalties for average highs outside 18–29°C and for each rainy day. We averaged June, July and August, ranked all 94 destinations, and capped countries at two entries. Full method and downloadable data: methodology · datasets (CC BY 4.0).
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Written by
John Morrison is the founder and lead travel writer at Packzup. Over the past decade he has explored destinations across Africa, the Americas, Asia, Europe, the Middle East, and Oceania — always self-funded, never on a press trip.