On 17 August 2026, the national average price of petrol in Portugal rose 1.6% (€ 0.030 a litre), from € 1.93/l to € 1.96/l. Filling a 50-litre tank costs € 1.52 more than the day before.
Our daily national series for this market covers 19 June – 17 August 2026 — 2 months — so no comparison here reaches further back than that. It is the largest one-day change for petrol since 10 August 2026. Between 10 August 2026 and 17 August 2026 the national average rose 0.8%, from € 1.95/l to € 1.96/l.
Percentages, price differences and fill-up estimates are calculated from unrounded national averages. Prices shown in prose and tables are rounded to two decimal places.
Key figures
| Fuel | 16 Aug | 17 Aug | Change | 10 – 17 August 2026 | Stations |
|---|---|---|---|---|---|
| Petrol | € 1.93/l | € 1.96/l | +1.6% | +0.8% | 3,242 / 3,242 |
| Diesel | € 2.03/l | € 2.05/l | +1.2% | +0.6% | 3,082 / 3,082 |
Across all reporting stations the change is +1.6%; across the 3,242 stations that reported on both days it is +1.6%. The panel covers 100.0% of the smaller daily sample.
| Metric | Value | Stations |
|---|---|---|
| All reporting stations | +1.6% | 3,242 / 3,242 |
| Matched-station panel | +1.6% | 3,242 |
| Panel coverage | 100.0% | 3,242 |
Portugal petrol average, 19 June – 17 August 2026
Chart values as a table
| Day | Average | Stations |
|---|---|---|
| € 1.95/l | 3,201 | |
| € 1.96/l | 3,208 | |
| € 1.96/l | 3,209 | |
| € 1.96/l | 3,213 | |
| € 1.96/l | 3,213 | |
| € 1.95/l | 3,214 | |
| € 1.95/l | 3,214 | |
| € 1.99/l | 3,218 | |
| € 2.01/l | 3,222 | |
| € 2.01/l | 3,222 | |
| € 2.01/l | 3,222 | |
| € 2.01/l | 3,222 | |
| € 2.01/l | 3,222 | |
| € 2.01/l | 3,222 | |
| € 2.03/l | 3,223 | |
| € 2.03/l | 3,224 | |
| € 2.03/l | 3,225 | |
| € 2.03/l | 3,225 | |
| € 2.03/l | 3,226 | |
| € 2.03/l | 3,227 | |
| € 2.03/l | 3,227 | |
| € 2.02/l | 3,229 | |
| € 2.02/l | 3,230 | |
| € 2.02/l | 3,234 | |
| € 2.02/l | 3,233 | |
| € 2.02/l | 3,235 | |
| € 2.02/l | 3,237 | |
| € 2.02/l | 3,237 | |
| € 1.95/l | 3,240 | |
| € 1.94/l | 3,242 | |
| € 1.94/l | 3,242 | |
| € 1.94/l | 3,242 | |
| € 1.93/l | 3,242 | |
| € 1.93/l | 3,242 | |
| € 1.93/l | 3,242 | |
| € 1.96/l | 3,242 |
Calculation details
Values below are the unrounded daily national averages used for every figure in this article, shown to 6 decimal places. Percentage change = (later average − earlier average) ÷ earlier average × 100.
| Metric | Value | Unit |
|---|---|---|
| Petrol, daily national average on 16 August 2026 | 1.933291 | EUR/l |
| Petrol, daily national average on 17 August 2026 | 1.963726 | EUR/l |
| Difference, 16 August 2026 to 17 August 2026 | 0.030435 | EUR/l |
| Percentage change, 16 August 2026 to 17 August 2026 | 1.5743 | % |
| Difference for a 50-litre fill-up | 1.5218 | EUR |
| Petrol, daily national average on 10 August 2026 | 1.947511 | EUR/l |
| Percentage change, 10 August 2026 to 17 August 2026 | 0.8326 | % |
Source and method
Prices are reported by station operators to Preços dos Combustíveis Online (Direção-Geral de Energia e Geologia (DGEG)). We collect them once a day and calculate the averages in this article ourselves. The national average is the unweighted mean of the 3,242 stations that reported a valid price for petrol, after we drop readings outside our plausibility range. Full method: how we calculate.
This article reports only what our calculations from station-price data show. It does not attribute the change to any cause.
The data behind this article
Data details
| Data snapshot | 17 August 2026 (Europe/Lisbon) |
|---|---|
| Method version | 2026-08-06.1 |
| Template version | 2.0.0 |
| Source freshness | Last collection cycle of the day: 2026-08-17 23:40:07; 3,242 readings collected that day. |
| Included | Gasolina simples 95: 3,242 stations with a valid price |
| Excluded | 0 readings outside the plausibility range 0.50–5.00 a litre, 0 flagged by the source, 0 from stations not in our catalogue |
| Matched coverage | 3,242 stations reported on both 16 August 2026 and 17 August 2026 — 100.0% of the smaller daily sample |
| Corrections | No corrections |