Gālla, Sri Lanka
Gulf of Mannar6.01°N, 80.25°EStation SR-GAL-UNA

Unawatuna Sea Water Temperature

A tropical beach on the Gulf of Mannar, warmest around April at about 29.6°C. Today's reading, 7-day forecast, and monthly averages below.

Live readings · auto-updating
Water Temperature NowBuoy & Sentinel-3 SST

Unawatuna water temperature

28.1
82.6°FTropical Warm (> 28°C)

Very warm bath-like water. Zero chill, exceptional for relaxation and snorkeling.

+0°vs Sep avgGulf of Mannar6.01°N, 80.25°E
Activity Index:SwimmingSnorkelingSurfingTypical conditions
Marine Atmosphere Grid Live Marine Feed
Coastal Air
30°C
85.3°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
28.1°C
82.6°F
Waves: 1m
Tropical
ThuOct 1
28.4°C
83.1°F
Waves: 0.9m
Tropical
FriOct 2
28.5°C
83.3°F
Waves: 0.7m
Tropical
SatOct 3
28.4°C
83.1°F
Waves: 0.6m
Tropical
SunOct 4
28.1°C
82.6°F
Waves: 0.7m
Tropical
MonOct 5
27.8°C
82°F
Waves: 0.9m
Warm
TueOct 6
27.7°C
81.9°F
Waves: 1m
Warm
Forecast cooling trend: -0.4°C over 7 days at Unawatuna.
Confidence: High

Unawatuna Monthly Water Temperature Averages

Historical monthly climatology. The warmest water in Unawatuna occurs inJanuary, February, March, April, May, June, July, August, September, October, November, December — peaking at29.6°C (85.3°F) in April.

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

Hover a bar for details
Current month Comfortable (20–24°C) Warm (24°C+) Cool (<20°C)
28
Jan
28
Feb
29
Mar
30
Apr
29
May
28
Jun
28
Jul
28
Aug
Current
28
Sep
28
Oct
29
Nov
28
Dec
Full 12-month data table — min / avg / max & swimming comfort
MonthMin Water TempAverage Water TempMax Water TempSwimming Comfort
January26.2°C27.8°C29.4°CWarm & Ideal (24°C – 28°C)
February26.9°C28.4°C29.3°CTropical Warm (> 28°C)
March26.9°C29.1°C31.1°CTropical Warm (> 28°C)
April27.7°C29.6°C31°CTropical Warm (> 28°C)
May27.1°C29°C30.7°CTropical Warm (> 28°C)
June27.1°C28.3°C29.6°CTropical Warm (> 28°C)
July26°C27.8°C29.2°CWarm & Ideal (24°C – 28°C)
August26°C27.7°C29.2°CWarm & Ideal (24°C – 28°C)
SeptemberCurrent26.4°C28.1°C30.2°CTropical Warm (> 28°C)
October27.2°C28.4°C29.1°CTropical Warm (> 28°C)
November25.9°C28.7°C29.6°CTropical Warm (> 28°C)
December26.8°C28.2°C29.2°CTropical Warm (> 28°C)

Swimming FAQs for Unawatuna

Is the sea warm enough to swim in Unawatuna today?

Typical sea surface temperature in Unawatuna this time of year is 28.1°C (82.6°F) — classified as Tropical Warm (> 28°C). Very warm bath-like water. Zero chill, exceptional for relaxation and snorkeling. Live readings load automatically.

What are the warmest months for swimming in Unawatuna?

The highest water temperatures in Unawatuna typically occur duringJanuary, February, March, April, May, June, July, August, September, October, November, December, when monthly averages reach peak seasonal levels.

What is the typical water temperature in Unawatuna in September?

Historically in September, water temperatures in Unawatuna average around28.1°C (82.6°F), fluctuating between a recorded minimum of 26.4°C and a maximum of 30.2°C.

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