Current sea water temperature:
+62.2°F
| Minimum sea water temperature in May: | 68.7°F |
| Maximum sea water temperature in May: | 59.0°F |
| Average sea water temperature in May: | 63.1°F |
| more information | |
14 days
forecast
forecast
| Lisbon |
monthly
weather
weather
| Lisbon |
Sea water temperature for the last 10 days:
| May 18 | 62.2°F | May 13 | 63.7°F |
| May 17 | 63.1°F | May 12 | 63.3°F |
| May 16 | 62.6°F | May 11 | 63.1°F |
| May 15 | 63.0°F | May 10 | 63.0°F |
| May 14 | 63.5°F | May 9 | 63.5°F |
Monthly sea water temperature, °F
When is the warmest sea in Lisbon?
Based on the data about daily sea water temperature for the last three years the warmest sea in Lisbon was noticed in August, July and September.
Monthly Sea Temperatures in Lisbon, °F
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 70.2°F. The highest and lowest sea temperatures during the month were 72.5°F and 68.2°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 69.1°F. The highest and lowest sea temperatures during the month were 72.3°F and 65.5°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 65.9°F. The highest and lowest sea temperatures during the month were 69.3°F and 63.0°F.
current
weather
weather
| Lisbon |
weather in
May
May
| Lisbon |
Best time for vacation in Lisbon
Lisbon on a weather map
Places in Portugal:
Name
°F
24 Hours Forecast
Lisbon
Local time: 05:19
May 19, tuesday
0600
55°F
SE
2 mph
2 mph
0900
61°F
SE
1 mph
1 mph
1200
68°F
SE
4 mph
4 mph
1500
72°F
SE
10 mph
10 mph
1800
68°F
SE
12 mph
12 mph
2100
63°F
SE
9 mph
9 mph
May 20, wednesday
0000
61°F
S
6 mph
6 mph
0300
59°F
S
6 mph
6 mph
