Swimming in Lisbon in september 2025: Average sea temperature in september and tide times in september 2025
Average sea temperature in Lisbon in september 2025.
In september, according to seasonal norms, the sea temperature in Lisbon is:
Minimum: 66°F
Average: 68°F
Maximum: 71°F
Other useful seasonal weather averages in september:
- Outside temperature: 64°F to 79°F
- Most common weather: "Clear/Sunny"
- The wind blows at 11.2mph
- It rains a total of 1.9in, over 3 day(s).
Should we swim in Lisbon in september?
Yes... and no. The water temperature in Lisbon in september is cool
Swimming in september on the beaches of Lisbon is possible but the sea water is cool. So even though the sea temperature sometimes climbs to 71°F, it can also be as low as 66°F! Note that the average is 68°F.
Note also that in september, the climate is perfect with an average outside temperature of 72°F, 1.8in of precipitation (over 3 days) and 81.79 % humidity.
Water and normal seasonal temperatures in Lisbon in september
| September | |||
| Average sea temperature | 68°F | ||
| Minimum sea temperature | 66°F | ||
| Maximum sea temperature | 71°F | ||
| Average outside temperature | 72°F | ||
| Maximum outside temperature | 81°F | ||
| Minimum outside temperature | 65°F | ||
| Wind speed | 11.8mph | ||
| Wind temperature | 65°F | ||
| Precipitation | 1.9in | ||
| Number of days of rain | 3 jour(s) (9%) | ||
| Humidity | 82% | ||
| Visibility in kilometers | 9.66km | ||
| Cloud cover | 18% | ||
| Our opinion | cool swimming |
Chart of the tides in september 2025
Tide times in september 2025 in Lisbon
Swim elsewhere in Portugal in september
| City | Average T° | Min. T° | Max. T° | Our opinion | Albufeira in september | 71°F | 73°F | pleasant swimming | Aveiro in september | 65°F | 68°F | cool swimming | Faro (Algarve) in september | 72°F | 74°F | pleasant swimming | Lagos in september | 71°F | 72°F | pleasant swimming | Porto in september | 65°F | 68°F | cool swimming | Viana do Castelo in september | 65°F | 68°F | cool swimming | Cascais in september | 68°F | 71°F | cool swimming | Portimao in september | 70°F | 72°F | pleasant swimming | Praia de Mira in september | 67°F | 69°F | cool swimming | Sines in september | 69°F | 71°F | cool swimming | Caminha in september | 66°F | 68°F | cool swimming | Carvoeiro in september | 71°F | 73°F | pleasant swimming | Costa da Caparica in september | 68°F | 71°F | cool swimming | Foz do Arelho in september | 68°F | 70°F | cool swimming | Praia da Rocha in september | 71°F | 73°F | pleasant swimming | Ericeira in september | 68°F | 71°F | cool swimming | Estoril in september | 68°F | 71°F | cool swimming | Monte Gordo in september | 71°F | 74°F | pleasant swimming | Nazaré in september | 67°F | 70°F | cool swimming | Olhao in september | 71°F | 74°F | pleasant swimming |