São Tomé and Príncipe - When to Visit

When to Visit São Tomé and Príncipe

Climate guide & best times to travel

Monthly Climate Data for São Tomé and Príncipe Average temperature and rainfall by month Climate Overview 15°C 20°C 25°C 30°C 35°C Rainfall (mm) 0 66 132 Jan Jan: 29.0°C high, 22.0°C low, 81mm rain Feb Feb: 29.0°C high, 22.0°C low, 84mm rain Mar Mar: 30.0°C high, 22.0°C low, 132mm rain Apr Apr: 30.0°C high, 22.0°C low, 122mm rain May May: 29.0°C high, 22.0°C low, 112mm rain Jun Jun: 28.0°C high, 21.0°C low, 18mm rain Jul Jul: 27.0°C high, 20.0°C low Aug Aug: 27.0°C high, 20.0°C low Sep Sep: 28.0°C high, 21.0°C low, 18mm rain Oct Oct: 28.0°C high, 21.0°C low, 109mm rain Nov Nov: 29.0°C high, 22.0°C low, 99mm rain Dec Dec: 29.0°C high, 22.0°C low, 109mm rain Temperature Rainfall
São Tomé and Príncipe sits almost exactly on the equator, and that single fact rules its weather. Moist Atlantic winds slam into volcanic summits topping two thousand metres, so your rainfall can flip from torrent to sunshine within a few kilometres. The southern and central highlands may be soaked while a northern beach bakes in dry sun. That patchwork of microclimates turns trip planning into a puzzle more engaging than glancing at a single rain chart. The year splits into two broad seasons. The gravana, the main dry season, runs from June through September and delivers the closest thing to guaranteed sunshine the equatorial Atlantic allows. July and August record essentially zero rainfall, highs ease to about 27°C (81°F), and the air feels lighter and fresher. The wet season stretches October through May, with March and April dumping over 130mm monthly. A lighter spell called the gravanito appears around January and February. Rains slacken but never vanish, giving a shoulder window for travellers ready to trade some cloud for emptier beaches. Temperatures barely budge all year. The hottest months, March or April, peak around 30°C (86°F). Coolest are July or August at 27°C (81°F). Only three degrees separate them. Equatorial island life means no cool season at all. You simply choose between heavy rain or almost none.

Best Time to Visit

Recommended timing for different travel styles.

Beach
For beach and relaxation travelers, July and August are the sweet spot. Rainfall is essentially zero, the sea stays calm and clear, and the sands of Praia Piscina and Banana Beach on the southern coast are at their easiest to reach. June and September act as shoulder months, delivering almost identical sunshine with fewer bodies on the sand.
Cultural
Cultural explorers should aim for January and February during the gravanito. Rains ease compared with the surrounding wet months, São Tomé and Príncipe's farms are busy, and you will stumble into local festivals and market rhythms without the gravana crowds.
Adventure
Adventure hikers can win big in October even as the rains return. Obo National Park turns neon green, Pico Cão Grande peels off its cloud veil for hours at a stretch, and the trails stay damp but not yet deluged. If you can handle mud and sudden showers, October delivers the most dramatic scenery.
Budget
Budget travellers who accept wetter skies should book November through May. Hotels and guesthouses, on Príncipe island, sit half-empty and prices soften outside the gravana peak. Wet-season rain rarely lasts all day. Expect an afternoon dump followed by clearing skies.

What to Pack

Essentials and seasonal recommendations for São Tomé and Príncipe.

Year-Round Essentials
lightweight, quick-drying clothing
Equatorial heat demands cotton and linen that breathe. Synthetics trap sweat. Add a thin moisture-wicking layer for jungle hikes.
quality waterproof jacket or packable rain poncho
earns its place in your bag regardless of the season. Even in the dry gravana months, afternoon cloud can build quickly in the highlands, and the wet season makes a rain layer non-negotiable.
High-SPF sunscreen
essential year-round given the proximity to the equator; UV intensity is consistently strong even on overcast days.
Strong insect repellent, preferably with DEET or a plant-based equivalent
important in coastal areas and around freshwater. Malaria is present in the archipelago, so this is not optional.
Reef-safe footwear that can handle both beach sand and muddy forest tracks, such as water sandals with good grip
serves most itineraries better than separate beach shoes and hiking boots.
dry bag or waterproof pouch
protects electronics and documents during boat transfers between the two main islands, which can involve spray regardless of conditions.
wet season from October through May
Clothing
an extra layer of quick-drying clothes for each hiking day
Footwear
waterproof sandals over open footwear
gravana dry season from June through September
Clothing
lighter packing
Layering Tip
a rain layer still belongs in your daypack given the island's microclimate variability
any season
Accessories
A light long-sleeved shirt
Layering Tip
useful for air-conditioned interiors and sun protection
Plug Type
European round-pin plugs, types C and F
Voltage
220 volts and 50 hertz
Adapter Note
Travelers from the United States or countries using flat-pin plugs will need a plug adapter. Those with 110-volt appliances will also need a voltage converter unless the device explicitly states it handles dual voltage, which most modern phone chargers and laptop adapters do.
Skip These Items
anything formally ironed or dry-clean-only Heavy walking boots A large umbrella Excessive amounts of cash or valuables
Full Packing Checklist

Interactive checklist with shopping links for every item you need.

View São Tomé and Príncipe Packing List →

Month-by-Month Guide

Climate conditions and crowd levels for each month of the year.

January

feels warm and moderately humid

High 29°C (84°F)
Low 22°C (72°F)
Rainfall 81mm
Crowds low to medium
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February

similar in character, perhaps marginally warmer

High 29°C (84°F)
Low None
Rainfall 84mm
Crowds low to medium
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March

brings the wettest conditions of the year

High 30°C (86°F)
Low None
Rainfall 132mm
Crowds low
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April

continues the wet peak

High 30°C (86°F)
Low None
Rainfall 122mm
Crowds low
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May

marks the beginning of the transition out of the heaviest rains

High 29°C (84°F)
Low None
Rainfall 112mm
Crowds low to medium
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June

is the turning point

High 28°C (82°F)
Low 21°C (70°F)
Rainfall 18mm
Crowds medium
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July

is the driest month of the year

High 27°C (81°F)
Low None
Rainfall zero recorded rainfall
Crowds high
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August

matches July almost exactly

High 27°C (81°F)
Low 20°C (68°F)
Rainfall no rainfall
Crowds high
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September

sees the first tentative signs of the wet season's return

High 28°C (83°F)
Low None
Rainfall 18mm
Crowds medium
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October

marks the wet season's return in earnest

High 28°C (83°F)
Low None
Rainfall 109mm
Crowds low to medium
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November

brings similar conditions to October

High 29°C (84°F)
Low 22°C (72°F)
Rainfall 99mm
Crowds low
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December

rounds out the year

High 29°C (84°F)
Low None
Rainfall 109mm
Crowds low to medium
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