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Coldest sea in Portugal in September

187 coastal locations in Portugal ranked by typical September sea temperature, coldest first. Region-wide average in September: 19.9°C.

Coldest in September

Altura

16.8°C September mean in Portugal

Regional September average

19.9°C

across all 187 coastal locations in Portugal

Vs annual mean

+2.2°C

above the year-round regional average

What the Portugal sea feels like in September

At this temperature, water will feel cold compared to a swimming pool, but with a bit of experience and practice most people will find the water relatively comfortable to swim in.

Portugal monthly average 15.4°C to 20.0°C
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  • Warmest month August 20.0°C
  • Coldest month March 15.4°C
  • Annual mean 17.7°C
  • Months above 20°C 0 of 12

Where September fits in the year

September sits inside the regional pattern shown on the left. Pick a different month to see how the ranking shifts.

All twelve Portugal month rankings:

Portugal sea temperature map (live)

The map shows today's latest reading at every Portugal location. The list below is based on the typical September mean.

Zoom in to see individual locations. Click a pin for water temperatures. View list →
°C -2 0 1 3 5 7 9 11 13 15 17 19 21 24 27 30 35

Top 50 coldest Portugal locations in September

Sorted by typical September mean from a decade of daily readings, coldest first. Click any place for the full location page.

# Location September mean
1 Altura Continental Portugal 16.8°C
2 Caminha Continental Portugal 16.8°C
3 Esmoriz Continental Portugal 16.8°C
4 Torreira Continental Portugal 16.8°C
5 Vila do Conde Continental Portugal 16.8°C
6 Esposende Continental Portugal 16.9°C
7 Ofir Continental Portugal 16.9°C
8 Viana do Castelo Continental Portugal 16.9°C
9 Afife Continental Portugal 16.9°C
10 Moledo Continental Portugal 16.9°C
11 Vila Praia de Ancora Continental Portugal 16.9°C
12 Aver-o-Mar Continental Portugal 16.9°C
13 Povoa de Varzim Continental Portugal 16.9°C
14 Oporto (Porto) Porto 17.1°C
15 Canidelo 17.2°C
16 Espinho Continental Portugal 17.2°C
17 Leca da Palmeira Continental Portugal 17.2°C
18 Leixoes Continental Portugal 17.2°C
19 Matosinhos Continental Portugal 17.2°C
20 Porto Continental Portugal 17.2°C
21 Vila Nova de Gaia Continental Portugal 17.2°C
22 Costa Nova Continental Portugal 17.6°C
23 Aveiro Continental Portugal 17.7°C
24 Praia de Mira Continental Portugal 17.7°C
25 Buarcos Continental Portugal 17.8°C
Show 25 more ▸
26 Figueira da Foz Continental Portugal 17.8°C
27 Alhandra Continental Portugal 17.8°C
28 Amadora Continental Portugal 17.8°C
29 Azenhas do Mar Continental Portugal 17.8°C
30 Cabo da Roca Continental Portugal 17.8°C
31 Ericeira Continental Portugal 17.8°C
32 Moscavide Continental Portugal 17.8°C
33 Povoa de Santa Iria Continental Portugal 17.8°C
34 Praia da Adraga Continental Portugal 17.8°C
35 Sao Joao da Talha Continental Portugal 17.8°C
36 Sintra Continental Portugal 17.8°C
37 Furadouro Continental Portugal 17.9°C
38 Pedrogao Continental Portugal 17.9°C
39 Praia da Vieira Continental Portugal 17.9°C
40 Vieira de Leiria Continental Portugal 17.9°C
41 Porto de Aveiro Aveiro 17.9°C
42 Caldas da Rainha Continental Portugal 18.2°C
43 Foz do Arelho Continental Portugal 18.2°C
44 Leiria Continental Portugal 18.2°C
45 Obidos Continental Portugal 18.2°C
46 Nazare Continental Portugal 18.3°C
47 Salir do Porto Continental Portugal 18.3°C
48 Sao Martinho do Porto Continental Portugal 18.3°C
49 Baleal Island Continental Portugal 18.5°C
50 Peniche Continental Portugal 18.5°C

Warmest 10 in Portugal in September

Same data the other way. The warmest spots for the same month.

# Location September mean
1 Fora (Iheus Selvagens) Madeira 24.0°C
2 Porto do Moniz Madeira 24.0°C
3 Porto da Cruz Madeira 24.0°C
4 Vila do Porto Açores 23.9°C
5 Campanario Madeira 23.9°C
6 Ponta do Sol Madeira 23.9°C
7 Canico Madeira 23.8°C
8 Funchal Madeira 23.8°C
9 Machico Madeira 23.8°C
10 Santa Maria Island Azores 23.8°C

More on this region