Current sea water temperature:
+59.9°F
| Minimum sea water temperature in December: | 63.9°F |
| Maximum sea water temperature in December: | 56.8°F |
| Average sea water temperature in December: | 60.2°F |
| more information | |
14 days
forecast
forecast
| Sintra |
monthly
weather
weather
| Sintra |
Sea water temperature for the last 10 days:
| December 18 | 59.9°F | December 13 | 60.4°F |
| December 17 | 60.1°F | December 12 | 60.4°F |
| December 16 | 60.3°F | December 11 | 60.4°F |
| December 15 | 60.3°F | December 10 | 60.3°F |
| December 14 | 60.6°F | December 9 | 60.6°F |
Monthly sea water temperature, °F
When is the warmest sea in Sintra?
Based on the data about daily sea water temperature for the last three years the warmest sea in Sintra was noticed in September, October and August.
Monthly Sea Temperatures in Sintra, °F
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 62.6°F. The highest and lowest sea temperatures during the month were 66.0°F and 60.3°F.
Sea water temperature in October, °F
Show year:
2025
2024
2023
The average sea water temperature in October of 2025 was 62.9°F. The highest and lowest sea temperatures during the month were 65.3°F and 60.3°F.
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 64.7°F. The highest and lowest sea temperatures during the month were 66.7°F and 63.0°F.
current
weather
weather
| Sintra |
weather in
December
December
| Sintra |
Best time for vacation in Sintra
Sintra on a weather map
Places in Portugal:
Name
°F
24 Hours Forecast
Sintra
Local time: 01:43
December 19, friday
0300
55°F
S
15 mph
15 mph
0600
55°F
S
19 mph
19 mph
0900
55°F
S
16 mph
16 mph
1200
55°F
S
18 mph
18 mph
1500
57°F
S
16 mph
16 mph
1800
55°F
S
14 mph
14 mph
2100
54°F
S
14 mph
14 mph
December 20, saturday
0000
54°F
SE
10 mph
10 mph
