Every destination has a month where the price falls, and the reason is almost always weather. The useful question is whether that weather is genuinely bad or just worse than the brochure, because the answer differs a lot by region.
Europe
| Period | Price | Reality |
|---|---|---|
| Jan–Feb | Lowest | Cold, short days, cities functional and empty |
| Late Apr–mid Jun | Moderate | Best value: warm, open, uncrowded |
| Jul–Aug | Peak | Hot, crowded, 50–80% higher |
| Sep–mid Oct | Moderate | Warm sea, harvest, thin crowds |
| Nov | Low | Wet in the north, fine in the south |
The two shoulder windows are where most people should look: 30–45 percent below peak for weather that is frequently better for walking around cities than August heat.
Deep winter is genuinely cheap and genuinely underused for city breaks. Rome, Seville, Lisbon and Athens in February are mild, quiet and half price.
Southeast Asia
The region has multiple cycles that do not align, which is what makes it confusing.
Thailand's two coasts run opposite. The Andaman side — Phuket, Krabi, Lanta — is best November to April. The Gulf side — Samui, Phangan, Tao — is best January to August and wettest in November.
Green season, May to October on the Andaman coast and across mainland Southeast Asia, cuts accommodation 30–50 percent. The rain is heavy afternoon bursts rather than all-day drizzle, and mornings are often clear. What you lose is boat reliability.
Avoid February to April in northern Thailand, Laos and northern Vietnam — agricultural burning makes air quality genuinely unhealthy, and it is dry, so rainfall-based season charts call it the best time.
The Caribbean and Mexico
September and early October are the cheapest and are the peak of hurricane season. Prices roughly halve.
Most weeks pass without disruption. What makes the low price worth taking is preparation: insurance bought before any named storm forms, flexible bookings, and a resort with a weather guarantee.
May, early June and November are the compromise — meaningfully cheaper than winter with much lower storm risk.
Note also sargassum seaweed on Caribbean-facing beaches from roughly April to August, which is more likely to affect a given trip than a hurricane.
Southern hemisphere
Inverted, which people forget when booking a northern-summer trip.
Patagonia and New Zealand's South Island largely shut down May to August. Many services close entirely.
South African game reserves are at their best in the northern summer — May to September is dry season, animals concentrate at waterholes, and it is outside the malaria peak. Cheap and good overlap here, which is unusual.
Australia's tropical north is best May to October; the south is best in the northern winter.
Japan
Worth its own note because the spikes are so sharp.
Avoid: the cherry blossom peak in the last week of March and first week of April, Golden Week from 29 April to 5 May, and Obon in mid-August. Fares run 40 percent above normal and the whole country is travelling.
Cheapest: late January to early March, and mid-May to mid-June.
The general rule
The month either side of peak is where the value sits — same weather, substantially lower prices, and everything still open. Going one month further out saves more and starts costing you closures and reduced services.
And whichever destination you are considering, check what its low season actually involves rather than assuming it means rain. Sometimes it means the whole town is shut.