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Huatulco sits on Mexico’s Pacific coast in Oaxaca, where the temperature barely moves all year. Daytime highs hold between 33 and 35°C (91-95°F) in every single month, and the sea stays between 26 and 30°C (79-86°F). The year splits into two clear halves: a bone-dry season from November to April and a rainy season from May to October that delivers most of the roughly 700mm of annual rain. Here is the full Huatulco weather by month breakdown so you can plan around the heat, the rain, and the best swimming conditions.
Huatulco Weather by Month: The Dry Season (November to April)
The dry season is when Huatulco earns its reputation as a sun destination. Rain is close to zero for half the year: January averages 3mm, February just 1mm, and March and April both record 1mm. February is the driest month, with zero rainy days on average. Sunshine runs 8 to 9 hours a day from November through March before easing to 7 hours in April. Daytime highs sit at 33-35°C (91-95°F) and nights drop to 19-23°C (66-73°F), which keeps evenings comfortable for walking around La Crucecita. This is the best window for boat tours through the nine bays and for the things to do in Huatulco that take you onto the water.
Huatulco Weather by Month: The Rainy Season (May to October)
Rain creeps in during May, when rainfall rises from 1mm in April to 27mm. June is the real start of the wet season at 176mm across about 7 rainy days, followed by 124mm in July and 121mm in August. September is the wettest month at 174mm, and October tapers to 66mm as the season winds down. Rain in Huatulco usually falls as a late-afternoon or evening downpour that clears within an hour or two, so mornings are often still usable for the beach. Sunshine drops to 5 to 6 hours a day from June through September. June to November is also hurricane season, and the Huatulco events and festivals calendar thins out during these months.
Huatulco Weather by Month: Monthly Averages
| Month | Avg High | Avg Low | Rain (mm) | Sea Temp |
|---|---|---|---|---|
| January | 33°C (91°F) | 19°C (66°F) | 3 | 26°C (79°F) |
| February | 33°C (91°F) | 19°C (66°F) | 1 | 27°C (81°F) |
| March | 34°C (93°F) | 20°C (68°F) | 1 | 27°C (81°F) |
| April | 35°C (95°F) | 22°C (72°F) | 1 | 28°C (82°F) |
| May | 35°C (95°F) | 23°C (73°F) | 27 | 29°C (84°F) |
| June | 34°C (93°F) | 23°C (73°F) | 176 | 30°C (86°F) |
| July | 34°C (93°F) | 22°C (72°F) | 124 | 30°C (86°F) |
| August | 35°C (95°F) | 22°C (72°F) | 121 | 30°C (86°F) |
| September | 34°C (93°F) | 22°C (72°F) | 174 | 29°C (84°F) |
| October | 34°C (93°F) | 21°C (70°F) | 66 | 29°C (84°F) |
| November | 33°C (91°F) | 20°C (68°F) | 9 | 28°C (82°F) |
| December | 33°C (91°F) | 19°C (66°F) | 1 | 27°C (81°F) |
Huatulco Weather by Month: Sea Temperature and Swimming
The Pacific water off Huatulco is warm enough to swim in year-round. Sea temperature peaks at 30°C (86°F) from June through August and only dips to 26°C (79°F) in January. The calmest, clearest water for snorkeling and diving runs from November through May, when visibility off the reefs at Maguey and San Agustin bays is at its best. During the rainy season the surf builds, and beaches like La Bocana become better for surfing than swimming. If you are deciding where to base yourself, compare the Huatulco neighborhoods and browse where to stay in Huatulco.
Huatulco Weather by Month: Planning Your Trip
Pack for heat no matter when you go: light cotton clothes, reef-safe sunscreen, and a rain shell from June to October. The strongest sun is between 11:00 and 16:00, when the UV index reaches 11 in spring. For a month-by-month recommendation on when to book flights and hotels, read our best time to visit Huatulco guide and the Huatulco travel tips page for arrival details.
