18.12
thu
thu
Day
84°F
SE 2 mph
Precip.
100%
100%
Night
75°F
SW 6 mph
Precip.
0%
0%
19.12
fri
fri
Day
81°F
NE 5 mph
Precip.
100%
100%
Night
77°F
N 2 mph
Precip.
0%
0%
20.12
sat
sat
Day
81°F
E 6 mph
Precip.
100%
100%
Night
77°F
S 6 mph
Precip.
100%
100%
21.12
sun
sun
Day
79°F
E 6 mph
Precip.
100%
100%
Night
77°F
NE 2 mph
Precip.
0%
0%
22.12
mon
mon
Day
79°F
E 4 mph
Precip.
85%
85%
Night
73°F
S 5 mph
Precip.
0%
0%
23.12
tue
tue
Day
81°F
NE 4 mph
Precip.
43%
43%
Night
75°F
W 1 mph
Precip.
0%
0%
24.12
wed
wed
Day
79°F
NE 5 mph
Precip.
0%
0%
Night
73°F
NW 2 mph
Precip.
0%
0%
25.12
thu
thu
Day
79°F
E 4 mph
Precip.
0%
0%
Night
73°F
SW 2 mph
Precip.
0%
0%
26.12
fri
fri
Day
81°F
NE 4 mph
Precip.
0%
0%
Night
75°F
NW 2 mph
Precip.
28%
28%
27.12
sat
sat
Day
81°F
NE 5 mph
Precip.
0%
0%
Night
77°F
N 4 mph
Precip.
45%
45%
28.12
sun
sun
Day
81°F
E 7 mph
Precip.
0%
0%
Night
77°F
NW 2 mph
Precip.
0%
0%
29.12
mon
mon
Day
82°F
E 7 mph
Precip.
24%
24%
Night
77°F
E 2 mph
Precip.
76%
76%
30.12
tue
tue
Day
82°F
N 6 mph
Precip.
74%
74%
Night
77°F
N 2 mph
Precip.
27%
27%
31.12
wed
wed
Day
81°F
E 7 mph
Precip.
100%
100%
Night
77°F
SW 5 mph
Precip.
75%
75%
sea water
temperature
temperature
| Unawatuna |
monthly
weather
weather
| Unawatuna |
current
weather
weather
| Unawatuna |
7 days
forecast
forecast
| Unawatuna |
Sea water temperature in December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 82.8°F. The highest and lowest sea temperatures during the month were 83.7°F and 82.2°F.
Sea water temperature in January, °F
Show year:
2025
2024
2023
The average sea water temperature in January of 2025 was 82.1°F. The highest and lowest sea temperatures during the month were 83.1°F and 81.7°F.
Air temperature in Unawatuna, °F
Precipitation total in Unawatuna, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Unawatuna
Unawatuna on a weather map
Places in Sri Lanka:
Name
°F
24 Hours Forecast
Unawatuna
Local time: 04:20
December 18, thursday
0600
77°F
SW
2 mph
2 mph
0900
81°F
S
2 mph
2 mph
1200
84°F
SE
2 mph
2 mph
1500
81°F
SE
7 mph
7 mph
1800
79°F
E
2 mph
2 mph
2100
77°F
W
6 mph
6 mph
December 19, friday
0000
75°F
SW
6 mph
6 mph
0300
75°F
S
4 mph
4 mph
