#1 in September
17.6°C
NOAA Season Curve (May–Oct):
M
11.8°
J
15.0°
J
17.6°
A
18.9°
S
17.6°
O
14.8°
N
11.5°
NOAA SATELLITE DATA (1991–2020 30-YEAR CLIMATOLOGY)
NLNetherlands Sea Temperature in September
Historical 30-year sea surface temperatures across 7 coastlines in Netherlands 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.
16.9°C
Bracing / Crispaverage across 7 surveyed coastlines in Netherlands, September
- Ranges 15.8°C at Scheveningen Beach & Pier to 17.6°C at Domburg Beach.
- No coastline in Netherlands reaches 21°C in any month — this is wetsuit or cold-water swimming.
- 1.6°C cooler than Netherlands’s August peak of 18.5°C (see August).
Select Month
View 12-Month Annual Overview →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
Netherlands Beaches in September
Individual coordinate lookups from NOAA 0.25° marine grid.
Showing 7 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)
