Average sea water temperature in May:
+61.2°F
| Minimum sea water temperature in May: | 66.4°F |
| Maximum sea water temperature in May: | 57.0°F |
Daily sea water temperature in May, °F
Show year:
2026
2025
2024
The average sea water temperature in May of 2026 was 61.2°F. The highest and lowest sea temperatures during the month were 62.8°F and 59.7°F.
Monthly sea water temperature in Cascais, °F
Which Portugal resorts have warmest sea in May?
| Place name | May 2026 | May 2025 |
|---|---|---|
| Madeira | 65.4°F | 68.3°F |
| Funchal | 65.4°F | 68.3°F |
| Porto Santo Island | 65.1°F | 66.9°F |
| Canico | 65.0°F | 68.0°F |
| Lisbon | 63.2°F | 63.9°F |
| Algarve | 62.8°F | 64.5°F |
| Faro | 62.8°F | 64.5°F |
| Setubal | 62.6°F | 63.4°F |
| Tavira | 62.5°F | 63.7°F |
| Santa Maria Island | 62.4°F | 65.1°F |
| Quarteira | 62.3°F | 63.7°F |
| Albufeira | 62.0°F | 63.2°F |
| Portimao | 61.8°F | 62.6°F |
| Alvor | 61.8°F | 62.6°F |
| Ponta Delgada | 61.6°F | 63.5°F |
| Sao Miguel | 61.5°F | 63.5°F |
| Lagos | 61.5°F | 62.3°F |
| Porto | 61.5°F | 60.7°F |
| Corvo Island | 61.5°F | 63.3°F |
| Flores Island | 61.4°F | 63.4°F |
Best time for vacation in Cascais
Cascais on a weather map
Places in Portugal:
Name
°F
24 Hours Forecast
Cascais
Local time: 03:38
May 17, sunday
0600
59°F
S
16 mph
16 mph
0900
61°F
SE
15 mph
15 mph
1200
61°F
SE
16 mph
16 mph
1500
61°F
SE
17 mph
17 mph
1800
61°F
S
19 mph
19 mph
2100
59°F
S
19 mph
19 mph
May 18, monday
0000
59°F
S
17 mph
17 mph
0300
57°F
S
14 mph
14 mph
