Portugal: where to swim in October?
Portugal, in October: the sea is at 19.6 °C on average along the coast, from 17.5 °C to 21.8 °C depending on the spot. Where the water is warmest (21.8 °C), it is pleasant. You can swim for a long time without shivering.
Sea temperature, month by month
| Month | Average temperature | Depending on the spot | Where it is warmest |
|---|---|---|---|
| January | 15.6 °C | 14.3 °C – 17.1 °C | cool |
| February | 14.9 °C | 13.8 °C – 16.3 °C | cool |
| March | 14.9 °C | 13.8 °C – 16.3 °C | cool |
| April | 16.0 °C | 15.1 °C – 17.2 °C | cool |
| May | 17.2 °C | 16.0 °C – 18.8 °C | cool |
| June | 18.5 °C | 17.4 °C – 20.2 °C | pleasant |
| July | 19.2 °C | 17.9 °C – 21.2 °C | pleasant |
| August | 19.5 °C | 18.1 °C – 21.3 °C | pleasant |
| September | 20.2 °C | 18.4 °C – 22.1 °C | pleasant |
| October | 19.6 °C | 17.5 °C – 21.8 °C | pleasant |
| November | 18.1 °C | 16.5 °C – 19.9 °C | pleasant |
| December | 16.7 °C | 15.0 °C – 18.2 °C | cool |
Compared with September, the water cools down by 0.6 °C in October. The warmest month: September (20.2 °C). The coldest: February (14.9 °C).
Nearby, in October
- France 18.0 °C · pleasant
- Ireland 13.7 °C · cold
- United Kingdom 12.9 °C · cool
- Netherlands 15.2 °C · cool
- Germany 13.7 °C · cold
- Croatia 20.9 °C · pleasant
And right now?
At sea, 16.6 °C on average across 1 stations, from 16.6 °C (Bouée ancrée 6200199) to 16.6 °C (Bouée ancrée 6200199). Portugal: water temperature
Frequently asked questions
What is the sea temperature in October?
Portugal, in October: 19.6 °C on average along the coast, from 17.5 °C in the coolest waters to 21.8 °C in the warmest (average of the years 2011 to 2025).
Can you swim in October?
Where the water is warmest (21.8 °C), it is pleasant. You can swim for a long time without shivering.
What is the best month for swimming?
The water is warmest in September (20.2 °C on average) and coldest in February (14.9 °C). Where the water is warmest, it goes above 20 °C in these months: June, July, August, September, October.
Where is the water warmest in October?
The warmest in October: France (18.0 °C), Ireland (13.7 °C), United Kingdom (12.9 °C). The coolest: Croatia (20.9 °C).
Where do these temperatures come from?
These are averages of the sea surface temperature from 2011 to 2025, computed from NOAA satellite images (OISST, one value about every 50 km), in a 100 km strip along the coasts of the main country: distant territories (overseas, remote islands) are not counted. It is an estimate, not a measurement taken at the beach: lakes and rivers are not included.