São Tomé in September
Great time to visit
September offers the sweet spot of excellent weather with moderating prices as peak season winds down. You get almost all the benefits of July-August travel without the premium cost.
Weather
September maintains excellent dry conditions with sunny days and pleasant temperatures. The trade winds continue providing natural air conditioning, and rainfall remains minimal. This marks the tail end of the peak dry season before things start shifting.
27°C high20°C low3 rain days
Crowds & Cost
moderate crowds
~$85/day average
Events & Festivals
- •Armed Forces Day (September 6)
September Tips
- •Last month of guaranteed dry weather - excellent value as crowds thin
- •Perfect for outdoor markets and street food exploration
- •Hotel rates start dropping while weather remains ideal
All Months
The dry season from June to September offers the most reliable weather, with temperatures hovering around 80°F and minimal rainfall. December and January work well too — still relatively dry but with more afternoon showers. Here's the reality: São Tomé sits on the equator, so it's always humid and temperatures barely fluctuate. The wet season from March to May brings daily downpours that can wash out roads and cancel boat trips to nearby islands. But even during dry months, pack rain gear. Afternoon thunderstorms are part of life here. October and November see the heaviest rains and roughest seas. If you're planning to hike in the interior or visit Ilhéu das Rolas, stick to the drier months when trails are more accessible.
São Tomé Scores
Solo
6/10
Couples
8/10
Families
6/10
Adventure
7/10
Budget
6/10
Luxury
4/10
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