Cove
Boca do Inferno
Lisbon · Portugal · Atlantic Ocean
38.6897, -9.4291 · Cascais, 1 km
- 19°Sea · September
- 23°High · August
- 11.5 hSunshine · July
Your month at the beach
Boca do Inferno in January
- 15°CAir, daytime high11°C at night
- 15°CSea temperature
- 4.8 hSunshine a day
- 10 daysRainy days in the month65 mm in total
- 21 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
Boca do Inferno in February
- 15°CAir, daytime high11°C at night
- 15°CSea temperature
- 6.2 hSunshine a day
- 8 daysRainy days in the month51 mm in total
- 22 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
Boca do Inferno in March
- 16°CAir, daytime high12°C at night
- 15°CSea temperature
- 7.3 hSunshine a day
- 9 daysRainy days in the month60 mm in total
- 21 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
Boca do Inferno in April
- 17°CAir, daytime high13°C at night
- 15°CSea temperature
- 9.0 hSunshine a day
- 9 daysRainy days in the month54 mm in total
- 20 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
Boca do Inferno in May
- 19°CAir, daytime high15°C at night
- 16°CSea temperature
- 10.6 hSunshine a day
- 7 daysRainy days in the month31 mm in total
- 20 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
Boca do Inferno in June
- 21°CAir, daytime high17°C at night
- 18°CSea temperature
- 11.1 hSunshine a day
- 2 daysRainy days in the month11 mm in total
- 20 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
Boca do Inferno in July
- 22°CAir, daytime high18°C at night
- 18°CSea temperature
- 11.5 hSunshine a day
- 1 dayRainy days in the month3 mm in total
- 22 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
Boca do Inferno in August
- 23°CAir, daytime high18°C at night
- 19°CSea temperature
- 10.9 hSunshine a day
- 1 dayRainy days in the month6 mm in total
- 20 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
Boca do Inferno in September
- 22°CAir, daytime high18°C at night
- 19°CSea temperature
- 9.1 hSunshine a day
- 5 daysRainy days in the month25 mm in total
- 17 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
Boca do Inferno in October
- 21°CAir, daytime high17°C at night
- 18°CSea temperature
- 6.8 hSunshine a day
- 10 daysRainy days in the month79 mm in total
- 19 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
Boca do Inferno in November
- 17°CAir, daytime high14°C at night
- 17°CSea temperature
- 5.3 hSunshine a day
- 12 daysRainy days in the month92 mm in total
- 21 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
Boca do Inferno in December
- 15°CAir, daytime high12°C at night
- 16°CSea temperature
- 4.8 hSunshine a day
- 11 daysRainy days in the month64 mm in total
- 22 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
The beach itself
- Not accessibleWheelchair accessOpenStreetMap
- No lifeguardLifeguardsUsually only in the bathing season · OpenStreetMap
- 67Places to stay within 5 kmHotels, guest houses, apartments and campsites · OpenStreetMap
- 8 kmAirport: Cascais Airport (CAT)In a straight line; by road it is further
No reliable information yet on: bathing water quality.
January from 2020 to 2025
In January 2025 the sea averaged 15.9 °C — 0.7 °C above the 1991–2020 average.
1991–2020 average: 15.2 °C
1991–2020 average: 14.6 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
February from 2020 to 2025
In February 2025 the sea averaged 15.2 °C — 0.5 °C above the 1991–2020 average.
1991–2020 average: 14.7 °C
1991–2020 average: 14.7 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
March from 2020 to 2025
In March 2025 the sea averaged 15.3 °C — 0.6 °C above the 1991–2020 average.
1991–2020 average: 14.7 °C
1991–2020 average: 15.9 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
April from 2020 to 2025
In April 2025 the sea averaged 16.4 °C — 1.0 °C above the 1991–2020 average.
1991–2020 average: 15.4 °C
1991–2020 average: 17.1 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
May from 2020 to 2025
In May 2025 the sea averaged 17.0 °C — 0.6 °C above the 1991–2020 average.
1991–2020 average: 16.4 °C
1991–2020 average: 19.1 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
June from 2020 to 2025
In June 2025 the sea averaged 18.1 °C — 0.4 °C above the 1991–2020 average.
1991–2020 average: 17.7 °C
1991–2020 average: 21.1 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
July from 2020 to 2025
In July 2025 the sea averaged 18.1 °C — about the same as the 1991–2020 average.
1991–2020 average: 18.3 °C
1991–2020 average: 22.3 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
August from 2020 to 2025
In August 2025 the sea averaged 18.9 °C — about the same as the 1991–2020 average.
1991–2020 average: 18.7 °C
1991–2020 average: 23.0 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
September from 2020 to 2025
In September 2025 the sea averaged 18.1 °C — 0.6 °C below the 1991–2020 average.
1991–2020 average: 18.8 °C
1991–2020 average: 22.3 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
October from 2020 to 2025
In October 2025 the sea averaged 18.0 °C — about the same as the 1991–2020 average.
1991–2020 average: 18.3 °C
1991–2020 average: 20.6 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
November from 2020 to 2025
In November 2025 the sea averaged 18.0 °C — 0.8 °C above the 1991–2020 average.
1991–2020 average: 17.2 °C
1991–2020 average: 17.4 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
December from 2020 to 2025
In December 2025 the sea averaged 15.8 °C — about the same as the 1991–2020 average.
1991–2020 average: 16.0 °C
1991–2020 average: 15.3 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
When to go
1991–2020 averagesThe year at a glance
- Jan15°5 h65 mm
- Feb15°6 h51 mm
- Mar15°7 h60 mm
- Apr15°9 h54 mm
- May16°11 h31 mm
- Jun18°11 h11 mm
- Jul18°12 h3 mm
- Aug19°11 h6 mm
- Sep19°9 h25 mm
- Oct18°7 h79 mm
- Nov17°5 h92 mm
- Dec16°5 h64 mm
Each card is a month. The colour is the sea temperature, on the same scale as the map; in bold, the two best months for each.
Sea temperature
1991–2020 averagesClimate through the year
1991–2020 averagesRain
Sunshine
Sunshine hours are estimated from measured solar radiation, not observed directly.
Month by month
1991–2020 averagesEvery month at Boca do Inferno: air, sea, rain and sunshine. Averages for 1991–2020.
| Month | High°C | Low°C | Sea°C | Rainmm | Rainy daysdays | Sunshineh/day | Windkm/h |
|---|---|---|---|---|---|---|---|
| January | 15 | 11 | 15 | 65 | 10 | 4.8 | 21 |
| February | 15 | 11 | 15 | 51 | 8 | 6.2 | 22 |
| March | 16 | 12 | 15 | 60 | 9 | 7.3 | 21 |
| April | 17 | 13 | 15 | 54 | 9 | 9.0 | 20 |
| May | 19 | 15 | 16 | 31 | 7 | 10.6 | 20 |
| June | 21 | 17 | 18 | 11 | 2 | 11.1 | 20 |
| July | 22 | 18 | 18 | 3 | 1 | 11.5 | 22 |
| August | 23 | 18 | 19 | 6 | 1 | 10.9 | 20 |
| Septemberwarmest sea | 22 | 18 | 19 | 25 | 5 | 9.1 | 17 |
| October | 21 | 17 | 18 | 79 | 10 | 6.8 | 19 |
| November | 17 | 14 | 17 | 92 | 12 | 5.3 | 21 |
| December | 15 | 12 | 16 | 64 | 11 | 4.8 | 22 |
Swipe sideways to see the other columns.
Photos
Photos shared by their authors on Wikimedia Commons, with its colours adjusted.
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Nearby destinations
About these numbers
Averages are for 1991–2020; the recent years (2020–2025) are what actually happened. Neither is today's weather.
| What | Where it comes from | Nearest measurement |
|---|---|---|
| Air, rain and sunshine | NASA POWER | 22 km away |
| Sea temperature | NOAA OISST v2.1, 1991–2020 | 9 km away |
| 2020–2025, month by month | NASA POWER · NOAA OISST v2.1 | 22 km away |
| Wheelchair access | OpenStreetMap | at this spot |
| Lifeguards and places to stay | OpenStreetMap | within 1–5 km |
| Nearest airport | OurAirports | straight-line distance |
| Image at the top | Sentinel-2 cloudless (EOX) | at this spot |