On 21 September 2026, the national average price of diesel in Portugal reached € 2.24/l, the highest value in our daily series, which covers 19 June – 21 September 2026. That is € 0.021 a litre above the previous peak of € 2.22/l, recorded on 18 September 2026.
Our daily national series for this market covers 19 June – 21 September 2026 — 95 days — so no comparison here reaches further back than that. Between 14 September 2026 and 21 September 2026 the national average rose 1.3%, from € 2.21/l to € 2.24/l. The current level is 17.5% above the 19 June – 21 September 2026 low of € 1.90/l, reached on 13 July 2026.
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 | 20 Sep | 21 Sep | Change | 14 – 21 September 2026 | Stations |
|---|---|---|---|---|---|
| Diesel | € 2.22/l | € 2.24/l | +0.9% | +1.3% | 3,105 / 3,106 |
| Petrol | € 2.11/l | € 2.13/l | +0.7% | +0.5% | 3,265 / 3,266 |
Across all reporting stations the change is +0.9%; across the 3,105 stations that reported on both days it is +0.9%. The panel covers 100.0% of the smaller daily sample.
| Metric | Value | Stations |
|---|---|---|
| All reporting stations | +0.9% | 3,105 / 3,106 |
| Matched-station panel | +0.9% | 3,105 |
| Panel coverage | 100.0% | 3,105 |
Portugal diesel average, 24 June – 21 September 2026
Chart values as a table
| Day | Average | Stations |
|---|---|---|
| € 1.90/l | 3,043 | |
| € 1.91/l | 3,050 | |
| € 1.91/l | 3,051 | |
| € 1.91/l | 3,055 | |
| € 1.91/l | 3,055 | |
| € 1.91/l | 3,056 | |
| € 1.91/l | 3,056 | |
| € 1.98/l | 3,060 | |
| € 2.02/l | 3,064 | |
| € 2.02/l | 3,064 | |
| € 2.02/l | 3,064 | |
| € 2.02/l | 3,064 | |
| € 2.02/l | 3,064 | |
| € 2.02/l | 3,064 | |
| € 2.08/l | 3,065 | |
| € 2.09/l | 3,066 | |
| € 2.09/l | 3,067 | |
| € 2.09/l | 3,067 | |
| € 2.09/l | 3,067 | |
| € 2.09/l | 3,068 | |
| € 2.09/l | 3,068 | |
| € 2.10/l | 3,069 | |
| € 2.11/l | 3,070 | |
| € 2.11/l | 3,073 | |
| € 2.11/l | 3,072 | |
| € 2.11/l | 3,074 | |
| € 2.10/l | 3,076 | |
| € 2.10/l | 3,076 | |
| € 2.04/l | 3,079 | |
| € 2.03/l | 3,081 | |
| € 2.03/l | 3,082 | |
| € 2.03/l | 3,082 | |
| € 2.03/l | 3,082 | |
| € 2.03/l | 3,082 | |
| € 2.03/l | 3,082 | |
| € 2.08/l | 3,088 | |
| € 2.09/l | 3,089 | |
| € 2.09/l | 3,089 | |
| € 2.09/l | 3,089 | |
| € 2.09/l | 3,089 | |
| € 2.09/l | 3,089 | |
| € 2.12/l | 3,090 | |
| € 2.13/l | 3,090 | |
| € 2.13/l | 3,090 | |
| € 2.13/l | 3,090 | |
| € 2.13/l | 3,091 | |
| € 2.12/l | 3,092 | |
| € 2.12/l | 3,092 | |
| € 2.09/l | 3,092 | |
| € 2.08/l | 3,092 | |
| € 2.08/l | 3,092 | |
| € 2.08/l | 3,092 | |
| € 2.08/l | 3,092 | |
| € 2.08/l | 3,092 | |
| € 2.08/l | 3,093 | |
| € 2.15/l | 3,094 | |
| € 2.17/l | 3,095 | |
| € 2.17/l | 3,095 | |
| € 2.17/l | 3,098 | |
| € 2.17/l | 3,099 | |
| € 2.17/l | 3,099 | |
| € 2.17/l | 3,099 | |
| € 2.21/l | 3,100 | |
| € 2.22/l | 3,101 | |
| € 2.22/l | 3,103 | |
| € 2.22/l | 3,104 | |
| € 2.22/l | 3,105 | |
| € 2.22/l | 3,105 | |
| € 2.22/l | 3,105 | |
| € 2.24/l | 3,106 |
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 |
|---|---|---|
| Diesel, daily national average on 20 September 2026 | 2.217814 | EUR/l |
| Diesel, daily national average on 21 September 2026 | 2.238394 | EUR/l |
| Diesel, daily national average on 18 September 2026 | 2.219436 | EUR/l |
| Difference, 20 September 2026 to 21 September 2026 | 0.020580 | EUR/l |
| Percentage change, 20 September 2026 to 21 September 2026 | 0.9279 | % |
| Diesel, daily national average on 14 September 2026 | 2.210427 | EUR/l |
| Percentage change, 14 September 2026 to 21 September 2026 | 1.2653 | % |
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 3,106 stations that reported a valid price for diesel, 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 | 21 September 2026 (Europe/Lisbon) |
|---|---|
| Method version | 2026-08-06.1 |
| Template version | 2.0.0 |
| Source freshness | Last collection cycle of the day: 2026-09-21 20:40:08; 3,106 readings collected that day. |
| Included | Gasóleo simples: 3,106 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 | 3,105 stations reported on both 20 September 2026 and 21 September 2026 — 100.0% of the smaller daily sample |
| Corrections | No corrections |