Sao Tome And Principe Weather & Climate Guide 2025
Plan your trip with detailed weather information and seasonal tips for Sao Tome And Principe.
São Tomé and Príncipe, a hidden paradise in the Gulf of Guinea, offers pristine beaches, lush rainforests, and rich Portuguese colonial heritage. This tiny island nation is perfect for eco-tourism, whale watching, and experiencing authentic African-Portuguese culture in one of the world's least visited destinations.
Best Time to Visit
Best Months
June-September (dry season, whale watching)
Months to Avoid
March-May, October-November (rainy seasons, lush landscapes)
Climate Overview
São Tomé and Príncipe sits on the equator in the Gulf of Guinea, giving it a hot, humid tropical climate year-round with temperatures consistently between 25–32°C (77–90°F) at sea level. The islands experience two distinct seasons — a long dry season (gravana) from June to September and a long rainy season (gravanito) from October to May, with a shorter dry spell in December–January. Rainfall is heaviest on the southern and mountainous parts of both islands, while the northern coast tends to be drier.
Month-by-Month Guide
What to expect each month of the year.
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Seasonal Planning Guide
Complete weather data, packing lists by season, and event calendars.
Seasonal Breakdown
Detailed information for each season.
🌸 Spring
Mar-May
The long rainy season is underway with frequent heavy downpours, high humidity, and lush green landscapes. Rain typically falls in intense afternoon bursts. This is the low season for tourism with significantly lower prices and fewer visitors.
☀️ Summer
Jun-Aug
The main dry season (gravana) begins in June and offers the best conditions for outdoor activities, beach time, and hiking. Lower humidity, cooler temperatures in highlands, and calmer seas. Peak whale watching season July–August.
🍂 Fall
Sep-Nov
September is the tail end of dry season. October–November bring the shorter rainy season (gravanito) with increasing rainfall and humidity. Sea turtle nesting season begins in November. Landscapes are beautifully verdant.
❄️ Winter
Dec-Feb
December–January offer a shorter dry spell (gravana pequena) with reduced rainfall and pleasant conditions. Sea turtle nesting continues on southern beaches. February brings the onset of the long rainy season.
What to Pack
Seasonal packing recommendations.
Year-Round Essentials
- Modest clothing (cover shoulders and knees)
- Comfortable walking shoes
- Sun protection (hat, sunscreen, sunglasses)
- Light scarf or shawl (for religious sites)
- Reusable water bottle
- Power adapter
- Basic first aid kit
Hot Weather Additions
- Lightweight, breathable fabrics
- Extra sun protection
- Cooling towel
- Light colors to reflect heat
- Sandals with back straps
Cool Weather Additions
- Warm layers (fleece, sweater)
- Light jacket or coat
- Rain gear (umbrella, waterproof jacket)
- Closed-toe shoes
- Warm accessories (if winter)
Events & Crowd Levels
Plan around busy periods and special events.
🔴 High Season
Jun-Sep (dry season, whale watching, European summer holidays)
Higher prices, advance booking essential, crowded attractions.
🟡 Shoulder Season
Dec-Jan and Nov (shorter dry season, turtle nesting season)
Good balance of weather and crowds. Reasonable prices.
🟢 Low Season
Feb-May and Oct (rainy seasons, very few tourists, lowest prices)
Best deals, fewer tourists. Some services may be limited.
Major Events & Holidays
Thousands of humpback whales migrate to São Tomé and Príncipe's warm waters to mate and calve. Boat tours offer spectacular whale watching opportunities, with August being peak season. Príncipe waters particularly renowned for close encounters.
Four species of sea turtles (green, hawksbill, olive ridley, and leatherback) come ashore to nest on São Tomé's beaches. Guided night tours allow visitors to witness this incredible natural phenomenon while supporting conservation efforts.
São Tomé and Príncipe's Independence Day celebrates freedom from Portuguese colonial rule with parades, music, dancing, traditional food, and cultural performances in São Tomé City. Vibrant displays of national pride and Santomean culture.
Three days of colorful parades, costumes, music, and street dancing before Lent. Smaller than Brazilian Carnival but authentic and full of local culture. Expect samba, traditional African rhythms, and creative costumes.
Visit working plantations during harvest season to see traditional processing methods. Many roças offer tours showing fermentation, drying, and roasting. Perfect time to purchase fresh products directly from producers.
National Culture Festival showcases Santomean music, dance, art, and cuisine. Multiple days of performances, exhibitions, and cultural events celebrating the islands' African-Portuguese heritage.
Plan Your Perfect Sao Tome And Principe Trip
Get our complete seasonal guide with detailed packing lists, event calendars, and month-by-month planning tips.
Download Weather Guide