NOAA SATELLITE DATA (1991–2020 30-YEAR CLIMATOLOGY)
IT

Italy Sea Temperature in September

Historical 30-year sea surface temperatures across 60 coastlines in Italy 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.
Bathing Climatology Gauge · Italy (September)
NOAA OISST v2.1 (0.25° Marine Grid)
24.1°C
Pleasant & Comfortable
Mean sea surface temperature across 60 monitored coastlines
Swimmability Verdict
Effortless Prolonged Bathing
Warmest Coastline
Coldest Surveyed Shore
Swimmable Ratio (≥21°C)
100% of surveyed coasts60/60

Italy’s primary swimming window runs from 6 Jun to 19 Oct (~135 days/year). Currently 1.8°C below the August peak of 25.9°C. High ocean specific heat capacity creates distinct thermal lag: water releases stored summer warmth gradually, making early autumn bathing warmer than late spring despite cooler evening air.

Plan Your September Trip to Italy

Autumn shoulder-season rates are currently live across Italy. Pair warm coastal waters with discounted stays and uncrowded beaches.

Autumn Stays in ItalyCompare Rates in Italy

Warmest Swimming Bases in Italy (September)

The top 3 coastlines holding highest water temperatures based on 30-year NOAA climatology.

NOAA OISST v2.1
#1 Warmest

Spiaggia dei Conigli

Lampedusa
25.8°C
#2 Warmest

Cefalù Beach

Cefalù, Sicily
25.5°C
#3 Warmest

Spiaggia delle Sabbie Nere

Vulcano, Aeolian Islands
25.3°C

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Tyrrhenian Sea Depth vs Northern Adriatic Shelf

The deep Tyrrhenian Sea surrounding Sardinia and western Italy forms a warm solar collector averaging 25.5–26.2°C in August. In contrast, the northern Venetian lagoon and upper Adriatic experience rapid seasonal heating and cooling over shallow sea beds.

Oceanographic Phenomenon:Deep Basin Solar Storage & Alpine Shelter
Thermal Lag Characteristic:Pronounced southern thermal lag: Sicily and Sardinia maintain 22.5–23.5°C water temperatures throughout October.
Peak Bathing Average:August (26.0°C)
Statutory Tourism Sources:
italia.itprenotazionespiaggiaconigli.itcalabriastraordinaria.itvisitsicily.infovendicari.net

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
Field Guides:Autumn Warmth Guide October Swimming Guide November Swimming Guide Late Escape Deals (15%+ Off)

Italy Beaches in September

Individual coordinate lookups from NOAA 0.25° marine grid.

Showing 60 coastlines
Cefalù Beach
#2 in September
25.5°C
Italy flagCefalù, Sicily, Italy
● Warm Bathwater
NOAA Season Curve (May–Oct):
M
18.9°
J
22.9°
J
26.1°
A
27.2°
S
25.5°
O
22.8°
N
19.9°
Mondello
#4 in September
25.3°C
Italy flagPalermo, Sicily, Italy
● Warm Bathwater
NOAA Season Curve (May–Oct):
M
18.6°
J
22.4°
J
25.8°
A
27.0°
S
25.3°
O
22.6°
N
19.6°
Praia I Focu
#5 in September
25.2°C
Italy flagVibo Valentia (Capo Vaticano / Ricadi), Calabria, Italy, Italy
● Warm Bathwater
NOAA Season Curve (May–Oct):
M
19.5°
J
23.2°
J
25.8°
A
26.5°
S
25.2°
O
22.5°
N
19.2°
Isola Bella Beach
#6 in September
25.1°C
Italy flagSicily (Messina / Taormina), Italy
● Warm Bathwater
NOAA Season Curve (May–Oct):
M
19.4°
J
23.5°
J
26.1°
A
26.8°
S
25.1°
O
22.1°
N
18.9°
Tropea Beach
#7 in September
25.1°C
Italy flagCalabria (Coast of the Gods), Italy
● Warm Bathwater
NOAA Season Curve (May–Oct):
M
19.4°
J
23.5°
J
26.1°
A
26.8°
S
25.1°
O
22.1°
N
18.9°
Cala Rossa (Favignana)
#8 in September
25.1°C
Italy flagSicily (Aegadian Islands / Favignana), Italy
● Warm Bathwater
NOAA Season Curve (May–Oct):
M
19.4°
J
23.5°
J
26.1°
A
26.8°
S
25.1°
O
22.1°
N
18.9°
Cala dell’Uzzo
#9 in September
25.0°C
Italy flagTrapani (San Vito Lo Capo / Zingaro Reserve), Sicily, Italy, Italy
● Warm Bathwater
NOAA Season Curve (May–Oct):
M
19.2°
J
23.0°
J
25.5°
A
26.5°
S
25.0°
O
22.5°
N
19.0°
Spiaggia di Grotticelle
#11 in September
24.9°C
Italy flagCapo Vaticano, Calabria, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
18.6°
J
22.6°
J
25.6°
A
26.7°
S
24.9°
O
22.4°
N
19.6°
Calamosche
#12 in September
24.9°C
Italy flagVendicari, Noto, Sicily, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
18.3°
J
21.8°
J
24.8°
A
26.3°
S
24.9°
O
22.6°
N
19.8°
Fontane Bianche
#13 in September
24.9°C
Italy flagSiracusa, Sicily, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
18.3°
J
21.8°
J
24.8°
A
26.3°
S
24.9°
O
22.6°
N
19.8°
San Vito Lo Capo
#15 in September
24.8°C
Italy flagSicily, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
18.1°
J
21.8°
J
25.1°
A
26.4°
S
24.8°
O
22.3°
N
19.3°
Punta Prosciutto
#16 in September
24.7°C
Italy flagPorto Cesareo, Puglia, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
18.2°
J
22.3°
J
25.1°
A
26.3°
S
24.7°
O
21.6°
N
18.2°
Porto Selvaggio
#17 in September
24.7°C
Italy flagNardò, Puglia, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
18.2°
J
22.3°
J
25.1°
A
26.3°
S
24.7°
O
21.6°
N
18.2°
Fiordo di Furore
#18 in September
24.6°C
Italy flagCampania (Amalfi Coast), Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
19.2°
J
23.4°
J
25.8°
A
26.5°
S
24.6°
O
21.5°
N
18.2°
Cala dei Gabbiani
#19 in September
24.5°C
Italy flagBaunei (Golfo di Orosei), Ogliastra, Sardinia, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
19.0°
J
22.8°
J
25.0°
A
25.8°
S
24.5°
O
22.0°
N
18.8°
Cala Luna
#20 in September
24.5°C
Italy flagGolfo di Orosei, Sardinia, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
17.9°
J
21.6°
J
24.8°
A
26.1°
S
24.5°
O
21.8°
N
18.8°
Cala Goloritzé
#21 in September
24.5°C
Italy flagSardinia, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
17.9°
J
21.6°
J
24.8°
A
26.1°
S
24.5°
O
21.8°
N
18.8°
Porto Giunco
#23 in September
24.3°C
Italy flagVillasimius, Sardinia, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
17.7°
J
21.3°
J
24.5°
A
25.9°
S
24.3°
O
21.7°
N
18.7°
Cala Sinzias
#24 in September
24.3°C
Italy flagCastiadas, Sardinia, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
17.7°
J
21.3°
J
24.5°
A
25.9°
S
24.3°
O
21.7°
N
18.7°
Costa Rei
#25 in September
24.3°C
Italy flagMuravera, Sardinia, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
17.7°
J
21.3°
J
24.5°
A
25.9°
S
24.3°
O
21.7°
N
18.7°
Fornillo Beach
#26 in September
24.3°C
Italy flagPositano, Amalfi Coast, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
18.7°
J
22.5°
J
25.1°
A
26.2°
S
24.3°
O
21.8°
N
19.3°
Maronti Beach
#27 in September
24.3°C
Italy flagIschia, Campania, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
18.7°
J
22.5°
J
25.2°
A
26.2°
S
24.3°
O
21.7°
N
19.1°
Poetto
#28 in September
24.3°C
Italy flagCagliari, Sardinia, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
17.5°
J
20.9°
J
24.0°
A
25.6°
S
24.3°
O
21.7°
N
18.7°
Spiaggia Grande
#29 in September
24.3°C
Italy flagPositano, Amalfi, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
18.7°
J
22.5°
J
25.1°
A
26.2°
S
24.3°
O
21.8°
N
19.3°
La Pelosa Beach
#31 in September
24.2°C
Italy flagSardinia (Sassari / Stintino), Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
18.8°
J
22.9°
J
25.4°
A
26.1°
S
24.2°
O
21.2°
N
17.9°
Cala Mariolu
#32 in September
24.2°C
Italy flagSardinia (Gulf of Orosei / Baunei), Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
18.8°
J
22.9°
J
25.4°
A
26.1°
S
24.2°
O
21.2°
N
17.9°
Berchida
#33 in September
24.1°C
Italy flagSiniscola, Sardinia, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
17.5°
J
21.0°
J
24.2°
A
25.7°
S
24.1°
O
21.4°
N
18.4°
Baia delle Zagare
#34 in September
24.1°C
Italy flagMattinata, Gargano, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
18.1°
J
22.3°
J
25.2°
A
26.3°
S
24.1°
O
20.7°
N
17.1°
Chia (Su Giudeu)
#35 in September
24.1°C
Italy flagDomus de Maria, Sardinia, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
17.4°
J
20.7°
J
23.7°
A
25.3°
S
24.1°
O
21.6°
N
18.6°
Grotta della Poesia
#36 in September
24.1°C
Italy flagPuglia (Salento / Melendugno), Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
18.9°
J
23.4°
J
25.8°
A
26.4°
S
24.1°
O
20.8°
N
17.5°
Spiaggia di Sperlonga
#37 in September
24.1°C
Italy flagSperlonga, Lazio, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
18.6°
J
22.2°
J
24.8°
A
25.9°
S
24.1°
O
21.6°
N
19.0°
Spiaggia di Levante
#38 in September
24.1°C
Italy flagSperlonga, Lazio, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
18.6°
J
22.2°
J
24.8°
A
25.9°
S
24.1°
O
21.6°
N
19.0°
Baia dei Turchi
#39 in September
24.0°C
Italy flagOtranto, Salento, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
18.0°
J
21.9°
J
24.6°
A
25.7°
S
24.0°
O
21.0°
N
18.0°
Tuerredda
#40 in September
24.0°C
Italy flagTeulada, Sardinia, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
17.4°
J
20.7°
J
23.6°
A
25.2°
S
24.0°
O
21.5°
N
18.6°
Scala dei Turchi
#41 in September
24.0°C
Italy flagSicily, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
17.7°
J
20.9°
J
23.5°
A
25.0°
S
24.0°
O
22.0°
N
19.4°
Torre dell'Orso
#42 in September
23.9°C
Italy flagMelendugno, Puglia, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
17.9°
J
21.9°
J
24.8°
A
25.8°
S
23.9°
O
20.5°
N
17.3°
Cala Brandinchi
#43 in September
23.6°C
Italy flagSan Teodoro, Sardinia, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
17.4°
J
20.8°
J
23.8°
A
25.3°
S
23.6°
O
21.0°
N
18.0°
Polignano a Mare
#44 in September
23.6°C
Italy flagLama Monachile, Puglia, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
17.9°
J
21.9°
J
24.7°
A
25.8°
S
23.6°
O
20.3°
N
17.2°
Spiaggia di Piscinas
#45 in September
23.5°C
Italy flagCosta Verde, Sardinia, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
17.7°
J
21.1°
J
23.7°
A
24.8°
S
23.5°
O
21.2°
N
18.3°
Is Arutas
#47 in September
23.3°C
Italy flagCabras, Sinis Peninsula, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
17.7°
J
21.0°
J
23.6°
A
24.6°
S
23.3°
O
21.1°
N
18.3°
Spiaggia di Cavoli
#48 in September
23.2°C
Italy flagElba, Tuscany, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
18.1°
J
21.7°
J
24.5°
A
25.3°
S
23.2°
O
20.7°
N
18.2°
Fetovaia
#49 in September
23.2°C
Italy flagElba, Tuscany, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
18.1°
J
21.7°
J
24.5°
A
25.3°
S
23.2°
O
20.7°
N
18.2°
Marina di Alberese
#50 in September
23.1°C
Italy flagMaremma Park, Tuscany, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
18.0°
J
21.5°
J
24.0°
A
24.9°
S
23.1°
O
21.0°
N
18.6°
Spiaggia di Sansone
#51 in September
23.1°C
Italy flagPortoferraio, Elba, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
18.0°
J
21.6°
J
24.3°
A
25.1°
S
23.1°
O
20.7°
N
18.3°
Monterosso al Mare
#52 in September
23.1°C
Italy flagCinque Terre, Liguria, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
18.0°
J
21.7°
J
24.4°
A
25.1°
S
23.1°
O
20.4°
N
17.8°
Cala Violina
#53 in September
23.0°C
Italy flagScarlino, Maremma, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
18.0°
J
21.5°
J
24.2°
A
25.0°
S
23.0°
O
20.8°
N
18.4°
Rimini Beach
#54 in September
23.0°C
Italy flagRimini, Emilia-Romagna, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
18.2°
J
22.5°
J
25.2°
A
25.9°
S
23.0°
O
19.4°
N
16.0°
Spiaggia del Principe
#55 in September
23.0°C
Italy flagCosta Smeralda, Sardinia, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
17.3°
J
20.7°
J
23.6°
A
24.9°
S
23.0°
O
20.3°
N
17.4°
San Fruttuoso
#57 in September
22.9°C
Italy flagPortofino Peninsula, Liguria, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
18.0°
J
21.7°
J
24.3°
A
25.1°
S
22.9°
O
20.4°
N
17.8°
Baia del Silenzio
#58 in September
22.9°C
Italy flagSestri Levante, Liguria, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
17.9°
J
21.5°
J
24.3°
A
25.0°
S
22.9°
O
20.3°
N
17.7°
Baia di Paraggi
#59 in September
22.9°C
Italy flagPortofino, Liguria, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
18.0°
J
21.7°
J
24.3°
A
25.1°
S
22.9°
O
20.4°
N
17.8°
Lido di Venezia
#60 in September
22.6°C
Italy flagVenice, Veneto, Italy
● Pleasant & Comfortable
NOAA Season Curve (May–Oct):
M
18.4°
J
22.7°
J
25.3°
A
25.8°
S
22.6°
O
19.0°
N
15.6°

Explore Sea Temperatures by Country

Spain(23.7°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)