South Australia, Australia
Coastal Waters34.86°S, 138.48°EStation AU-SOU-SEM

Semaphore Park Beach Sea Water Temperature

A mild beach on the Coastal Waters, warmest around February at about 22.3°C. Today's reading, 7-day forecast, and monthly averages below.

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Water Temperature NowBuoy & Sentinel-3 SST

Semaphore Park Beach water temperature

14
57.2°FVery Cold (< 16°C)

Wetsuit strongly recommended. Sudden entry may cause cold shock. Suitable only for brief, brisk plunges.

+0°vs Sep avgCoastal Waters34.86°S, 138.48°E
Activity Index:SwimmingSnorkelingSurfingTypical conditions
Marine Atmosphere Grid Live Marine Feed
Coastal Air
16°C
59.9°F onshore
Wind Speed
12 km/h
Surface wind
Wave Height
0.8 m
Slight shore chop
Swell
0.6 m
Deep water swell
Wave Period
6 s
Peak interval
UV Index
—
Daily maximum
Sunrise
—
First morning light
Sunset
—
Golden hour close

7-Day Water Temperature Forecast

Open-Meteo ocean model
Today
WedSep 30
14°C
57.2°F
Waves: 1m
Very Cold
ThuOct 1
14.3°C
57.7°F
Waves: 0.9m
Very Cold
FriOct 2
14.4°C
57.9°F
Waves: 0.7m
Very Cold
SatOct 3
14.3°C
57.7°F
Waves: 0.6m
Very Cold
SunOct 4
14°C
57.2°F
Waves: 0.7m
Very Cold
MonOct 5
13.7°C
56.7°F
Waves: 0.9m
Very Cold
TueOct 6
13.6°C
56.5°F
Waves: 1m
Very Cold
Forecast cooling trend: -0.4°C over 7 days at Semaphore Park Beach.
Confidence: High

Semaphore Park Beach Monthly Water Temperature Averages

Historical monthly climatology. The warmest water in Semaphore Park Beach occurs inJanuary, February, March, December — peaking at22.3°C (72.1°F) in February.

Year-Round Water Temperature Curve (°C / °F)

Hover a bar for details
Current month Comfortable (20–24°C) Warm (24°C+) Cool (<20°C)
22
Jan
22
Feb
22
Mar
20
Apr
17
May
15
Jun
13
Jul
13
Aug
Current
14
Sep
16
Oct
18
Nov
20
Dec
Full 12-month data table — min / avg / max & swimming comfort
MonthMin Water TempAverage Water TempMax Water TempSwimming Comfort
January19°C21.7°C24.8°CComfortable (20°C – 24°C)
February20.7°C22.3°C23.8°CComfortable (20°C – 24°C)
March20°C21.5°C24.5°CComfortable (20°C – 24°C)
April17.1°C19.6°C20.7°CCool / Refreshing (16°C – 20°C)
May14.6°C17.2°C19.2°CCool / Refreshing (16°C – 20°C)
June13.2°C15.1°C16.6°CVery Cold (< 16°C)
July12.1°C13.4°C14.4°CVery Cold (< 16°C)
August12°C13°C14.1°CVery Cold (< 16°C)
SeptemberCurrent12.5°C14°C15.3°CVery Cold (< 16°C)
October13.7°C15.8°C17.5°CVery Cold (< 16°C)
November15.8°C18.1°C20.4°CCool / Refreshing (16°C – 20°C)
December18°C20.1°C22°CComfortable (20°C – 24°C)

Swimming FAQs for Semaphore Park Beach

Is the sea warm enough to swim in Semaphore Park Beach today?

Typical sea surface temperature in Semaphore Park Beach this time of year is 14°C (57.2°F) — classified as Very Cold (< 16°C). Wetsuit strongly recommended. Sudden entry may cause cold shock. Suitable only for brief, brisk plunges. Live readings load automatically.

What are the warmest months for swimming in Semaphore Park Beach?

The highest water temperatures in Semaphore Park Beach typically occur duringJanuary, February, March, December, when monthly averages reach peak seasonal levels.

What is the typical water temperature in Semaphore Park Beach in September?

Historically in September, water temperatures in Semaphore Park Beach average around14°C (57.2°F), fluctuating between a recorded minimum of 12.5°C and a maximum of 15.3°C.

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