Portugal
Porto in August: weather, sea & travel advice
This month's data profile
Strong month under the current formula
Porto in August is climatically well suited to city breaks, active holidays and hiking, family holidays and beach holidays. The average daily high is around 25 °C, and the sea is about 17 °C. With about 3 rainy days it is dry.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
83/100 · #1
Warmth
#1
Dryness
#2
Sun
#3
Sea warmth
#2
Published best categories: Overall, Beach, City break, Active, Family
Porto · AugustPhoto: Ken & Nyetta · CC BY 2.0Climate facts
- Average high
- 25 °C
- Average low
- 17 °C
- Sea
- 17 °C
- Rainy days (est.)
- 3 rainy days (est.)
- Sun (est.)
- 8 h/day
- Humidity
- 72 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| July | 25 | 16 | 3 | 13 | 9.0 | 73 | 1.8 | 17 | 82 |
| August (selected) | 25 | 17 | 3 | 21 | 7.9 | 72 | 1.7 | 17 | 83 |
| September | 23 | 16 | 7 | 58 | 6.1 | 74 | 1.7 | 17 | 77 |
How do the previous and next months compare?
Baseline: August (83/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| July | -1 | -0.4 °C | -0.5 °C | -0.5 | -7.8 mm | +1.1 h | +0.4 % | +0.1 m/s | -0.3 °C |
| September | -6 | -1.5 °C | -0.7 °C | +4 | +37.9 mm | -1.8 h | +2.2 % | ±0 m/s | +0.1 °C |
All twelve months in context
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Frequently asked questions
How warm is Porto in August?
The average daily high is around 25 °C, with an average daily low of about 17 °C.
Can you swim in Porto in August?
The sea is about 17 °C (cold).
Does it rain a lot in Porto in August?
The curated estimate is about 3 rainy days per month, not a directly measured long-term average. Total precipitation averages around 21 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Porto?
By the climate score, June, July, August and September are the strongest months for Porto. For a beach trip: June, July, August and September. August is one of them.