Viana do Castelo Sea Temperature Today: 30-Day Water Forecast
The sea temperature in Viana do Castelo today is +21°C. Over the next 30 days, the water temperature is expected to stay between +18°C and +22°C. The water is usable for swimming, but it can feel cool during longer swims. For a shorter view, open the 14-day sea temperature forecast.
Daily air temperature for the month
Day +23°C
Night +17°C
Daily sea water temperature for the month
Water +21°C
Tap a date to open detailed daily weather
| July | Day | Night | Sea t° | Wind | Precipitation | Humidity |
|---|---|---|---|---|---|---|
| 21Tue |  +23°C |  +17°C | +21°C | 3 m/s, WSW | 0 mm | 84% |
| 22Wed |  +24°C |  +17°C | +22°C | 3 m/s, SW | 0 mm | 82% |
| 23Thu | +24°C | +18°C | +22°C | 3–4 m/s, S | 0.5 mm | 80% |
| 24Fri |  +22°C |  +17°C | +22°C | 4 m/s, SW | 2.8 mm | 83% |
| 25Sat |  +23°C | +17°C | +21°C | 9 m/s, NNW | 0 mm | 79% |
| 26Sun | +23°C | +17°C | +19°C | 7 m/s, NNW | 0 mm | 79% |
| 27Mon | +28°C | +17°C | +18°C | 7 m/s, N | 0 mm | 66% |
| 28Tue | +32°C | +20°C | +19°C | 3–4 m/s, N | 0 mm | 56% |
| 29Wed | +29°C | +17°C | +19°C | 4 m/s, WNW | 0 mm | 68% |
| Further values are multi-year averaged climate | ||||||
| 30Thu | +26°C | +17°C | +19°C | 4 m/s | 0 mm | 70% |
| 31Fri | +25°C | +17°C | +19°C | 4 m/s | 0 mm | 73% |
| 1Sat | +25°C | +17°C | +19°C | 4 m/s | 0.3 mm | 75% |
| 2Sun | +24°C | +16°C | +19°C | 4 m/s | 0 mm | 77% |
| 3Mon | +25°C | +16°C | +19°C | 5 m/s | 0 mm | 73% |
| 4Tue | +25°C | +16°C | +19°C | 5 m/s | 0 mm | 71% |
| 5Wed | +25°C | +17°C | +19°C | 4 m/s | 0 mm | 71% |
| 6Thu | +25°C | +17°C | +19°C | 4 m/s | 0 mm | 73% |
| 7Fri | +24°C | +16°C | +19°C | 3 m/s | 0.1 mm | 75% |
| 8Sat | +25°C | +17°C | +19°C | 3 m/s | 0 mm | 74% |
| 9Sun | +25°C | +16°C | +19°C | 3 m/s | 0 mm | 77% |
| 10Mon | +25°C | +17°C | +19°C | 3 m/s | 0 mm | 74% |
| 11Tue | +24°C | +17°C | +19°C | 3 m/s | 0 mm | 79% |
| 12Wed | +24°C | +16°C | +19°C | 4 m/s | 0.2 mm | 79% |
| 13Thu | +24°C | +15°C | +19°C | 4 m/s | 0.1 mm | 78% |
| 14Fri | +23°C | +16°C | +19°C | 4 m/s | 0 mm | 76% |
| 15Sat | +23°C | +15°C | +19°C | 4 m/s | 0.1 mm | 76% |
| 16Sun | +24°C | +16°C | +19°C | 5 m/s | 0.6 mm | 74% |
| 17Mon | +23°C | +15°C | +19°C | 5 m/s | 0.5 mm | 79% |
| 18Tue | +24°C | +16°C | +19°C | 5 m/s | 0 mm | 77% |
| 19Wed | +23°C | +16°C | +19°C | 5 m/s | 1.3 mm | 77% |
| 20Thu | +24°C | +16°C | +19°C | 4 m/s | 0.1 mm | 77% |
Sea water temperature by months
Water +19°C
Day and night air temperature
Day +25°C
Night +16°C
Weather minimums and maximums in Viana do Castelo for a month
- Warmest day: 28 July, +32°C
- Coldest night: 13 August, +15°C
- Days with precipitation in a month: 13
- Precipitation for a month: 6.7 mm
- Rainiest day in a month: 24 July
- Maximum precipitation amount: 24 July 2.8 mm
- Highest sea water temperature: 22 July, +22°C
- Lowest sea water temperature: 27 July, +18°C