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Warmest sea temperatures in Europe in September: ranked by sea temperature

Nicosia tops the list at 27 °C in September. Ranked from 1991–2020 climate normals across 50 destinations in Europe.

Top three in September: Nicosia (27 °C) , Limassol (26 °C) , Valletta (26 °C) . Between first and 50th place the sea temp differs by 7.7 °C.

# Destination Country Sea temp Avg high Avg low Rainfall Wet days Sunshine Sea temp
1 Nicosia Cyprus 27 °C 32 °C 21 °C 11 mm 2 350 h 27 °C
2 Limassol Cyprus 26 °C 30 °C 22 °C 3 mm 1 350 h 26 °C
3 Valletta Malta 26 °C 26 °C 23 °C 34 mm 4 341 h 26 °C
4 Palermo Italy 25 °C 27 °C 20 °C 61 mm 9 335 h 25 °C
5 Athens Greece 25 °C 28 °C 19 °C 17 mm 3 343 h 25 °C
6 Catania Italy 25 °C 28 °C 20 °C 52 mm 7 324 h 25 °C
7 Palma Spain 25 °C 27 °C 20 °C 45 mm 6 327 h 25 °C
8 Reggio Calabria Italy 25 °C 26 °C 19 °C 80 mm 11 331 h 25 °C
9 Messina Italy 25 °C 26 °C 20 °C 77 mm 10 331 h 25 °C
10 Elche Spain 25 °C 28 °C 19 °C 36 mm 5 334 h 25 °C
11 Taranto Italy 25 °C 26 °C 19 °C 48 mm 6 330 h 25 °C
12 Alicante Spain 25 °C 27 °C 20 °C 47 mm 7 334 h 25 °C
13 Castelló de la Plana Spain 25 °C 26 °C 19 °C 47 mm 6 323 h 25 °C
14 Valencia Spain 25 °C 27 °C 19 °C 60 mm 6 322 h 25 °C
15 Pátra Greece 25 °C 27 °C 18 °C 52 mm 6 330 h 25 °C
16 Thessaloníki Greece 25 °C 27 °C 18 °C 49 mm 6 321 h 25 °C
17 Cartagena Spain 24 °C 26 °C 21 °C 38 mm 4 338 h 24 °C
18 Naples Italy 24 °C 25 °C 18 °C 90 mm 9 323 h 24 °C
19 Sochi Russia 24 °C 23 °C 17 °C 111 mm 10 322 h 24 °C
20 La Laguna Spain 24 °C 22 °C 19 °C 14 mm 2 349 h 24 °C
21 Bari Italy 24 °C 25 °C 19 °C 57 mm 8 326 h 24 °C
22 Badalona Spain 24 °C 24 °C 18 °C 79 mm 11 312 h 24 °C
23 Barcelona Spain 24 °C 24 °C 18 °C 79 mm 11 312 h 24 °C
24 Sabadell Spain 24 °C 24 °C 16 °C 89 mm 12 309 h 24 °C
25 Durrës Albania 24 °C 24 °C 19 °C 115 mm 9 324 h 24 °C
26 Las Palmas de Gran Canaria Spain 23 °C 25 °C 21 °C 12 mm 2 349 h 23 °C
27 Novorossiysk Russia 23 °C 24 °C 16 °C 44 mm 7 325 h 23 °C
28 Almería Spain 23 °C 28 °C 20 °C 17 mm 2 345 h 23 °C
29 Livorno Italy 23 °C 24 °C 18 °C 100 mm 9 324 h 23 °C
30 San Marino San Marino 23 °C 21 °C 12 °C 77 mm 9 315 h 23 °C
31 Genoa Italy 23 °C 24 °C 17 °C 125 mm 11 300 h 23 °C
32 Makhachkala Russia 23 °C 23 °C 18 °C 65 mm 9 284 h 23 °C
33 Trieste Italy 23 °C 22 °C 15 °C 168 mm 11 299 h 23 °C
34 Nice France 22 °C 24 °C 17 °C 74 mm 7 323 h 22 °C
35 Varna Bulgaria 22 °C 23 °C 16 °C 52 mm 6 303 h 22 °C
36 Monaco Monaco 22 °C 23 °C 17 °C 76 mm 8 323 h 22 °C
37 Jerez de la Frontera Spain 22 °C 29 °C 18 °C 27 mm 3 344 h 22 °C
38 Constanţa Romania 22 °C 22 °C 15 °C 50 mm 6 309 h 22 °C
39 Málaga Spain 22 °C 26 °C 20 °C 25 mm 3 342 h 22 °C
40 Toulon France 22 °C 24 °C 17 °C 68 mm 7 323 h 22 °C
41 Sevastopol Ukraine 22 °C 22 °C 16 °C 35 mm 6 322 h 22 °C
42 Marbella Spain 21 °C 25 °C 19 °C 31 mm 4 342 h 21 °C
43 Marseille France 21 °C 24 °C 17 °C 72 mm 6 324 h 21 °C
44 Donostia / San Sebastián Spain 21 °C 21 °C 15 °C 102 mm 13 297 h 21 °C
45 Gibraltar Gibraltar 21 °C 25 °C 20 °C 36 mm 4 341 h 21 °C
46 Santander Spain 20 °C 22 °C 15 °C 82 mm 11 307 h 20 °C
47 Bilbao Spain 20 °C 22 °C 16 °C 65 mm 11 297 h 20 °C
48 Odesa Ukraine 20 °C 21 °C 15 °C 39 mm 5 296 h 20 °C
49 Montpellier France 20 °C 24 °C 15 °C 107 mm 6 315 h 20 °C
50 Gijón Spain 20 °C 21 °C 15 °C 78 mm 11 308 h 20 °C

Monthly values for the month named in the ranking; only destinations with a published climate page are ranked. Download this ranking as CSV.

The same ranking one month earlier and later

August: top 5

  1. Nicosia 28 °C
  2. Limassol 27 °C
  3. Palermo 27 °C
  4. Messina 27 °C
  5. Valletta 27 °C

Full ranking for August

October: top 5

  1. Nicosia 25 °C
  2. Limassol 25 °C
  3. Valletta 24 °C
  4. La Laguna 24 °C
  5. Las Palmas de Gran Canaria 23 °C

Full ranking for October

How this ranking is built

What is ranked
The average sea surface temperature at the coast, in °C, in September, highest first.
Period
1991–2020 climate normals: the same 30 years for every destination, so the list compares like with like.
Who is included
50 destinations in Europe with a published climate page. Neighbouring places that share a climate series are shown once.
Ties
Equal values are ordered by beach score.
Sources
ERA5 / ERA5-Land reanalysis via Open-Meteo; sea temperature from NOAA OISST v2.1. Measured values are reproduced unchanged; only the ordering is ours.

Data sources and method

Normal period
1991–2020
Dataset version
era5-1991-2020-scores1.1
Last processed

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: ranking order, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.