#1Hot
Boa Vista
- Day
- 29.1°C
- Sea
- 26.0°C
- Sun
- 6.1h
- Rain days
- 3
Your August weather guide
Weather in Cape Verde in August
August is a good month for Cape Verde if you want warm seas and hot days, and can accept some rain. Country averages reach 28°C by day, stay at 25°C at night and put the sea at 26°C. The catch is that evenings offer little cooling down. Boa Vista suits travellers who prefer hotter afternoons, while Sal is the better choice if you want less daytime heat and slightly fewer rainy days.
Long-term climate averages, not a forecast · 1991-2020
- Average daytime high
- 27.7°Cacross 2 destinations
- Average night-time low
- 24.6°Cafter dark
- Sea temperature
- 25.9°Cwarm enough to swim
- Rainy days
- 3days1 mm or more
Cape Verde, month by month
Turn up the warmth
Warmest places in Cape Verde in August
Ranked by average daytime high. The full comparison is in the table below.
#2Hot
Sal
- Day
- 26.3°C
- Sea
- 25.9°C
- Sun
- 6.4h
- Rain days
- 3
Cape Verde destinations ranked for August
All 2 places we track in Cape Verde, ordered by daytime high.
August climate overview
Daytime highs across Cape Verde in August run from 26.3°C (Sal) to 29.1°C (Boa Vista). In Boa Vista about 100% of August days reach 25°C. Nights average 24.6°C; the coldest 10% of nights in Sal fall to 24°C or below.
Rainfall in August
Expect around 3 rainy days (1 mm or more) in August, with Sal the driest (3 days) and Boa Vista the wettest (3 days). The wettest August at Boa Vista between 1991 and 2020 was 2015 with 85 mm; the driest was 1992 with 1 mm.
Sea temperature
The sea averages 25.9°C around Cape Verde in August - warmest at Boa Vista (26.0°C). That is comfortable for swimming.
Sunshine and daylight
Around 6.3 hours of sunshine a day on average, out of 12.5 hours of daylight (sunshine estimated from cloud cover).
August against the rest of the year in Cape Verde
August is the 3rd warmest month of the twelve in Cape Verde. It is 1.5°C warmer than July and 0.4°C warmer in September. The hottest month here is September (28°C) and the coolest February (23°C).
Which part of Cape Verde in August?
- Most sunshine: Sal, 6.4 h a day.
- Driest: Sal, about 3 rainy days.
- Warmest sea: Boa Vista, 26°C.
- Hottest: Boa Vista, 29°C by day.
- Coolest (better for walking and cities): Sal, 26°C.
What to pack for Cape Verde in August
Based on the averages: summer clothes for the day; swimwear - the sea is 26°C.
Similar weather elsewhere in August
Within 1.5°C of Cape Verde's August daytime average: Algarve (29°C, sea 21°C), Rhodes (29°C, sea 27°C), Aruba (29°C, sea 28°C), Verona (29°C), Chiang Mai (29°C). See the full ranking for August.
Boa Vista or Sal: choose your level of heat
Boa Vista is the hotter option, with daytime temperatures averaging 29°C against Sal's 26°C. That makes Sal a better fit if you find hot afternoons tiring but still want warm swimming conditions: the sea averages 26°C at both destinations. The trade-off comes after dark. Boa Vista averages 24°C at night, slightly cooler than Sal's 25°C, so choosing the cooler island by day does not mean cooler evenings. Sal also has a small advantage for rain, averaging 2 rainy days rather than Boa Vista's 3. Choose Boa Vista for stronger daytime warmth, or Sal if keeping afternoon heat lower matters more to you.
Expect warm evenings and leave room for rain
Pack mainly light clothing, including something loose and comfortable for evenings: a country night-time average of 25°C means you should not rely on sunset to bring much relief from the heat. For walking or other active plans, favour mornings over the hottest part of the afternoon, and leave time for shade at midday. August averages 3 rainy days nationally, so rain is a possibility rather than a reason to dismiss the month. Keep outdoor plans flexible instead of assuming every day will stay dry. The month suits travellers comfortable with warmth throughout the day and night; it is less suited to anyone seeking distinctly cool evenings.
A little more detail
Cape Verde in August FAQs
Plain answers, grounded in the averages.
Where is the hottest place in Cape Verde in August?
Boa Vista is the warmest of the 2 places we track in Cape Verde in August with an average high of 29.1°C; Sal is the coolest at 26.3°C.
Is the sea warm in Cape Verde in August?
The sea averages 22°C or more at Boa Vista (26°C), Sal (26°C) in August.
Is the sea warm enough for swimming in August?
The sea averages 26°C around both Boa Vista and Sal, making August a good choice if warm water is a priority. There is no temperature advantage between them for swimming, so base your choice on daytime heat and rain instead.
How much sunshine can I expect?
Cape Verde averages 6.2 hours of sunshine a day in August. That supports plans for time outdoors, but it is not a promise of clear skies throughout the day. Allow for breaks in the sunshine rather than expecting uninterrupted sun.
About these averages
ERA5-Land climate reanalysis via Open-Meteo (11 km grid), 1991-2020
Averages computed from daily values at 2 destination points.Records are the highest and lowest daily values in that 30-year period, not all-time records. These are climate averages, not a forecast for your trip. How we measure holiday weather
- Hot · 25°C+
- Warm · 20°C to below 25°C
- Mild · 15°C to below 20°C
- Cool · below 15°C