#1 in September
25.0°C
NOAA Season Curve (May–Oct):
M
18.2°
J
21.6°
J
24.7°
A
26.2°
S
25.0°
O
22.4°
N
19.2°
NOAA SATELLITE DATA (1991–2020 30-YEAR CLIMATOLOGY)
ESSpain Sea Temperature in September
Historical 30-year sea surface temperatures across 70 coastlines in Spain for September. Derived from NOAA 0.25° blended satellite and in-situ marine observations.
Climatology Notice: Temperatures represent the 30-year long-term historical average (1991–2020 normal), not a live single-day sensor forecast.
22.8°C
Pleasant & Comfortableaverage across 70 surveyed coastlines in Spain, September
- Ranges 16.6°C at Praia de Carnota to 25.0°C at Es Trenc.
- 55 of 70 surveyed coastlines are at or above the 21°C swim threshold in September.
- On the national average, the water is above 21°C from 23 Jun to 13 Oct — about 112 days a year.
- 0.8°C cooler than Spain’s August peak of 23.6°C (see August).
Select Month
View 12-Month Annual Overview →Balearic Sea Heat Reservoir vs Cantabrian Atlantic Chill
Spain presents Europe’s sharpest internal contrast: the Balearic Sea and Costa Blanca reach 26.0–26.5°C in August in calm, high-evaporation conditions, while northern Atlantic Galicia and the Cantabrian Sea hover at 19.5–21.0°C due to open North Atlantic wave fetch, tidal mixing, and periodic Rías upwelling.
Oceanographic Phenomenon:Mediterranean Microclimate vs Bay of Biscay Swell
Thermal Lag Characteristic:Extended Mediterranean thermal lag: Mallorca and Ibiza maintain 22.4°C sea temperatures into late October, creating Europe’s longest comfortable autumn swimming zone.
Peak Bathing Average:August (26.2°C)
The September Thermal Lag Advantage
Because seawater has a high specific heat capacity, it acts as a massive thermal battery. Southern European and Mediterranean basins absorb solar energy all summer, reaching maximum heat storage by late August. In September, while air temperatures drop, the water releases heat slowly, which creates sea temperatures that are typically 3°C to 5°C warmer than in June.
CYPRUS (AYIA NAPA / PROTARAS)
27.5°C
Effortless swimming
TURKEY (ANTALYA / KAŞ)
27.3°C
Warm bathwater
GREECE (CRETE / RHODES)
25.4°C
Extended season
MALTA & GOZO
26.1°C
Crystal clear
Spain Beaches in September
Individual coordinate lookups from NOAA 0.25° marine grid.
Showing 70 coastlines
Explore Sea Temperatures by Country
Spain(23.6°C)Italy(25.9°C)Turkey(27.3°C)France(22.4°C)Greece(25.4°C)Cyprus(27.7°C)Croatia(25.2°C)Albania(25.5°C)Montenegro(25.7°C)Malta(26.7°C)Bulgaria(25.1°C)Romania(24.7°C)Slovenia(25.4°C)Portugal(20.7°C)Poland(19°C)Sweden(18.3°C)Netherlands(18.5°C)Bosnia & Herzegovina(25.2°C)Monaco(24.6°C)Latvia(18.5°C)Estonia(18°C)Lithuania(18.8°C)Germany(18.6°C)Denmark(18°C)Norway(15.3°C)Belgium(18.7°C)Faroe Islands(10.9°C)United Kingdom(16.1°C)Ireland(15.9°C)Iceland(10.9°C)Finland(16.6°C)
