Destination guide
Boa Vista weather by month
June, May and March are the best months to choose for Boa Vista, with June offering the strongest mix of warmth, sunshine and dry weather. Its average daytime temperature is 27°C, with 9 hours of sunshine, making it a good fit for a holiday spent outdoors. The catch in May and March is a cooler sea at 22°C. Later in the year, swimming temperatures rise, but rain becomes more likely and nights stay warmer.
- Hottest month
- 29.4°CSeptember
- Coolest month
- 24.5°CFebruary
- Warmest sea
- 26.6°CSeptember
- Flight from London
- 6 h 12 minMid-haul (4.5-7 h) · estimated
Boa Vista, month by month
A little perspective
Boa Vista through the year
Every month at a glance; "best" marks our three top months on warmth, dryness and sunshine.
| Month | Day | Night | Sea | Sun/day | Rain mm | Rainy days | Days 25°C+ |
|---|---|---|---|---|---|---|---|
| January | 24.7°C | 20.1°C | 22.7°C | 5.9 | 4 | 0 | 42% |
| February | 24.5°C | 19.7°C | 21.9°C | 6.5 | 1 | 0 | 37% |
| Marchbest | 24.9°C | 19.7°C | 21.9°C | 7.4 | 1 | 0 | 41% |
| April | 25.1°C | 20.2°C | 22.2°C | 7.0 | 1 | 0 | 49% |
| Maybest | 25.7°C | 20.8°C | 22.5°C | 8.0 | 0 | 0 | 72% |
| Junebest | 26.6°C | 21.7°C | 23.0°C | 8.6 | 0 | 0 | 96% |
| July | 27.8°C | 22.9°C | 24.3°C | 7.1 | 3 | 1 | 99% |
| August | 29.1°C | 24.5°C | 26.0°C | 6.1 | 22 | 3 | 100% |
| September | 29.4°C | 25.1°C | 26.6°C | 6.3 | 37 | 6 | 100% |
| October | 29.2°C | 24.6°C | 26.6°C | 6.4 | 18 | 2 | 100% |
| November | 27.9°C | 23.2°C | 25.7°C | 5.3 | 4 | 1 | 99% |
| December | 26.0°C | 21.6°C | 24.1°C | 5.5 | 3 | 0 | 80% |
Day = average daytime high, night = average night-time low, 1991-2020.Sun is hours per day; rainy days count 1 mm or more.
Day, night and sea
Monthly average temperatures, 1991-2020
- Day
- Night
- Sea
Best months here
On warmth, low rainfall and sunshine, start with these.
When to go to Boa Vista
For beach weather, look at months where the daytime average clears 25°C and rainy days stay low: April, May, June, July, August, September, October, November, December. September is the wettest month (37 mm, about 6 rainy days) and May the driest (0 mm). The sea is warmest in September at 26.6°C and coolest in February at 21.9°C.
Getting there
A direct flight from London Gatwick to Aristides Pereira International Airport (BVC, 5 km from Sal Rei) takes roughly 6 h 12 min - mid-haul (4.5-7 h) by UK standards. Time-zone: Atlantic/Cape Verde.
Records and extremes, 1991-2020
The hottest day recorded in Boa Vista between 1991 and 2020 reached 32.9°C on 5 October 2015; the coldest fell to 16.1°C on 28 February 2018. In September one day in ten tops 30.8°C and about 31% of days pass 30°C; in February one night in ten drops to 18.4°C or below. The wettest single month of the period was October 1999 with 133 mm, against a October average of 18 mm.
Sunrise, sunset and daylight in Boa Vista
Local time on the 15th of each month; daylight-saving rules as of 2020.
| Month (15th) | Sunrise | Sunset | Daylight | Sunshine/day |
|---|---|---|---|---|
| January | 07:03 | 18:19 | 11.3 h | 5.9 h |
| February | 06:58 | 18:34 | 11.6 h | 6.5 h |
| March | 06:39 | 18:42 | 12.0 h | 7.4 h |
| April | 06:17 | 18:47 | 12.5 h | 7.0 h |
| May | 06:02 | 18:55 | 12.9 h | 8.0 h |
| June | 06:00 | 19:05 | 13.1 h | 8.6 h |
| July | 06:08 | 19:08 | 13.0 h | 7.1 h |
| August | 06:16 | 18:56 | 12.7 h | 6.1 h |
| September | 06:20 | 18:34 | 12.2 h | 6.3 h |
| October | 06:24 | 18:11 | 11.8 h | 6.4 h |
| November | 06:35 | 17:58 | 11.4 h | 5.3 h |
| December | 06:52 | 18:02 | 11.2 h | 5.5 h |
December to April: dry days, cooler swimming
December through April suits travellers who want warm days without the island's highest temperatures. December averages 26°C by day, while January, March and April sit at 25°C; February is the coolest month, with a daytime average of 24°C. These months average no rain days, so rain is less likely to disrupt outdoor plans, although that is not a guarantee of clear skies. March and April offer more sunshine than the winter months. The main compromise is the water: the sea falls from 24°C in December to 22°C from February onwards. Pack swimwear, but consider a light layer for evenings, with night-time averages settling at 20°C from January through April.
May to July: the best balance of sunshine and warmth
May and June are strong choices if sunshine matters more to you than the warmest possible sea. May averages 26°C by day and June reaches 27°C, with sunshine increasing from 8 to 9 hours. Both average no rain days, making this a useful window for spending much of the day outdoors. Plan shade around midday rather than treating the moderate averages as a reason to skip sun protection. July brings a warmer feel, with days at 28°C and nights at 23°C. The sea also warms to 24°C, but sunshine drops to 7 hours and rain becomes possible. Choose June for the brighter balance, or July if warmer water is your priority.
August to November: warmer seas, more weather compromises
August to October share a daytime average of 29°C, so this period suits travellers comfortable with heat and warm evenings. September has the most rain days at 6, compared with 3 in August and 2 in October. October therefore offers a useful compromise: the sea remains at 27°C, as in September, but rain is less frequent. Nights average 25°C in both months, so light sleepwear makes sense. November eases to 28°C by day and 23°C at night, while the sea stays warm at 26°C. Its catch is sunshine, averaging 5 hours. August, September and November are weaker overall choices, though their warmer water may matter more to you than longer sunny spells.
A little more detail
Boa Vista weather FAQs
Plain answers, grounded in the averages.
What is the best time to visit Boa Vista?
Judged on warmth, low rainfall and sunshine, the best months in Boa Vista are June, May and March. September is the hottest month (average high 29.4°C) and February the coolest (24.5°C).
How many months a year is Boa Vista over 25°C?
9 months in Boa Vista average a daytime high of 25°C or more, and 12 average 20°C or more.
When is the rainy season in Boa Vista?
September is the wettest month in Boa Vista (37 mm on average) and May the driest (0 mm). Annual rainfall averages 94 mm.
What is the hottest temperature recorded in Boa Vista?
The hottest day recorded in Boa Vista between 1991 and 2020 reached 32.9°C on 5 October 2015; the coldest fell to 16.1°C on 28 February 2018. Records come from daily data for 1991-2020, not from a single station's all-time history.
When is the sea warmest in Boa Vista?
September and October have the warmest average sea temperature at 27°C. October is the better compromise if you also want fewer rain interruptions. August and November remain good options for warmer water, with the sea averaging 26°C.
Will I need a jacket in the evenings?
A light layer is sensible if you feel the cold, especially from January to April, when nights average 20°C. Evenings are warmer later in the year, with September and October averaging 25°C overnight, so heavier clothing is unlikely to be useful.
Should I avoid September because of rain?
Not necessarily, but it is a weaker choice if dry weather is your priority. September averages 6 rain days alongside warm seas and hot days. June, May or March offer a better balance for travellers who want to minimise rain disruption.
See also: Cape Verde weather by month · where else is hot in September
About these averages
ERA5-Land climate reanalysis via Open-Meteo (11 km grid) and NOAA Coral Reef Watch 5 km sea temperatures, 1991-2020
Averages computed from daily values at Sal Rei. Sea temperature from the nearest 5 km sea cell, 0.8 km from that point. Sunshine hours are estimated from average cloud cover.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