Baia Ostina
40.916° N, 8.738° ESandy beach · facing north
About the beach
Baia Ostina is a sandy beach in the municipality of Castelsardo, in the province of Sassari (Sardinia), on the Sea of Sardinia.
Facing north (350°), it is sheltered with the Ostro (S) or Sirocco (SE); with the Tramontane (N) or Mistral (NW), which comes from the sea, it gets rougher.
Sandy bottom: easy entry into the water, just take care when the sea is rough.
In the latest European EEA classification (2025 season) the bathing water is rated good.
7-day forecast
| Day | Morning | Afternoon | Temp. |
|---|---|---|---|
| TODAY 13 oct | 82 | 85 | 24°C |
| WED 14 oct | 94 | 82 | 24°C |
| THU 15 oct | 94 | 85 | 25°C |
| FRI 16 oct | 85 | 80 | 24°C |
| SAT 17 oct | 94 | 82 | 24°C |
| SUN 18 oct | 82 | 86 | 25°C |
| MON 19 oct | 61 | 61 | 26°C |
Where is Baia Ostina
Baia Ostina is located in the municipality of Castelsardo, in the province of Sassari, in Sardinia. Coordinates: 40.91571, 8.73846.
2.1 km as the crow flies from the centre of Castelsardo and 26 km from Sassari, the provincial capital.
Winds and shelter at Baia Ostina
The effect of each wind on this beach, which faces north (350°): what matters is where it comes from relative to the coast, not just its strength.
| Wind | From | Effect here |
|---|---|---|
| Tramontane | north | From the sea onto the shore: waves and rough sea |
| Gregale | northeast | Cross-shore, from the sea: some waves possible |
| Levante | east | Cross-shore, from inland: moderate effect |
| Sirocco | southeast | From inland: sheltered, calmer sea |
| Ostro | south | From inland: sheltered, calmer sea |
| Libeccio | southwest | Cross-shore, from inland: moderate effect |
| Ponente | west | Cross-shore, from the sea: some waves possible |
| Mistral | northwest | From the sea onto the shore: waves and rough sea |
Questions about Baia Ostina
Can you swim at Baia Ostina today?
Today (afternoon) the sea score at Baia Ostina is 85/100 (Perfect Conditions): waves 0.5 m, wind 12 km/h, temperature 24°C. Go to the beach now. The score is updated twice a day based on waves, wind relative to the beach's orientation, rain and temperature.
Where is Baia Ostina?
Castelsardo (SS), Sardinia, 26 km as the crow flies from Sassari.
Which wind is Baia Ostina sheltered from?
Sheltered with the Ostro (S) or Sirocco (SE); exposed with the Tramontane (N) or Mistral (NW).
Is Baia Ostina sandy or rocky?
Baia Ostina is a sandy beach.
How is the water quality at Baia Ostina?
Good (EEA classification, 2025 season).