Weather in Lisbon for August 2026
In general, the average temperature in Lisbon at the beginning of August is 28.1 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 26 °C by the end of August.
Precipitation in Lisbon during August is a rare event, with an average of fewer than 2 rainy days.
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Lisbon Weather August
What’s the Weather Like in Lisbon This August?
Temperatures trend during August in Lisbon
August weather in Lisbon day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Aug. |  Sunny | 28° /18° | 0 mm | 7 | |
| 2 Aug. |  Partly cloudy | 28° /17° | 0 mm | 7 | |
| 3 Aug. | Sunny | 28° /17° | 0 mm | 7 | |
| 4 Aug. | Sunny | 28° /18° | 0 mm | 7 | |
| 5 Aug. | Sunny | 29° /18° | 0 mm | 7 | |
| 6 Aug. | Sunny | 28° /17° | 0 mm | 7 | |
| 7 Aug. | Sunny | 28° /18° | 0 mm | 7 | |
| 8 Aug. | Sunny | 27° /17° | 0 mm | 7 | |
| 9 Aug. | Sunny | 28° /17° | 0 mm | 7 | |
| 10 Aug. | Sunny | 29° /18° | 0 mm | 7 | |
| 11 Aug. | Sunny | 30° /18° | 0 mm | 7 | |
| 12 Aug. | Sunny | 30° /18° | 0 mm | 7 | |
| 13 Aug. | Sunny | 29° /18° | 0 mm | 7 | |
| 14 Aug. | Sunny | 28° /17° | 0 mm | 7 | |
| 15 Aug. | Sunny | 29° /18° | 0 mm | 7 | |
| 16 Aug. | Sunny | 29° /17° | 0 mm | 7 | |
| 17 Aug. | Sunny | 28° /17° | 0 mm | 7 | |
| 18 Aug. | Sunny | 28° /17° | 0 mm | 7 | |
| 19 Aug. | Sunny | 28° /18° | 0 mm | 7 | |
| 20 Aug. | Sunny | 28° /18° | 0 mm | 7 | |
| 21 Aug. | Sunny | 28° /17° | 0 mm | 7 | |
| 22 Aug. | Sunny | 29° /18° | 0 mm | 7 | |
| 23 Aug. | Sunny | 30° /18° | 0 mm | 7 | |
| 24 Aug. | Sunny | 28° /18° | 0 mm | 7 | |
| 25 Aug. | Sunny | 27° /17° | 0 mm | 7 | |
| 26 Aug. | Sunny | 27° /16° | 0 mm | 7 | |
| 27 Aug. | Sunny | 26° /16° | 0 mm | 6 | |
| 28 Aug. | Sunny | 25° /16° | 0.2 mm | 7 | |
| 29 Aug. | Sunny | 25° /17° | 0 mm | 6 | |
| 30 Aug. | Partly cloudy | 26° /17° | 0 mm | 7 | |
| 31 Aug. |  Overcast | 26° /17° | 0 mm | 6 | |
| Next | |||||
Lisbon weather in August vs July vs September
| July | August | September | |
|---|---|---|---|
| Weather | Sunny | Sunny | Sunny |
| Temperatures | 28°/17° | 27°/18° | 25°/17° |
| Rainfall | 2 mm | 0 mm | 50 mm |
| Wind | 25.1 km/h | 25.1 km/h | 21.6 km/h |
| Humidity | 63% | 66% | 68% |
| Rainy days | 1 days | 0 days | 13 days |
| Dry days | 30 days | 31 days | 17 days |
Planning a trip to Lisbon? Discover the best time to visit
Lisbon in August - FAQ
Lisbon water temperatures in August
The average water temperature of the Atlantic Ocean near Lisbon in August is 17.5 °C. At the beginning of August temperatures are around 18.1 °C; by the end of the month they get cooler and reach 17 °C.
- What is the water temperature in Lisbon in August?
- The average water temperature in Lisbon in August is 17.5 °C.
- Can you swim in Lisbon in August?
- Brisk: quick dips and active swimming are fine, but pack a 2–3 mm spring suit if you plan longer sessions or early-morning outings.
What to pack to Lisbon in August?
As you prepare for your trip to Lisbon in August, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Lisbon, during August, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Lightweight Clothing: T-shirts, blouses, shorts, skirts
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Personal Items
- Sunscreen: High SPF for sunny destinations
- Lip Balm with SPF: To protect against chapped lips
UV exposure in Lisbon during August
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