- Temperature
- Feels like
- Rain
- Wind
- Sea water
- Waves
- Updated
Sea water: 19.9°C, cooling slightly to around 19°C over the coming days
Waves: 1.2m
At 19.9 °C the water in Tróia is fresh. Fine for a dip, but the first minute bites.
Sunrise: 07:01 · Sunset: 20:12 · Day length: 13h 11m
| Day | Sea water | Waves |
|---|---|---|
| Friday 28/08 | 19.9 °C | 1.2 m |
| Saturday 29/08 | 20.2 °C | 0.9 m |
| Sunday 30/08 | 20.2 °C | 0.6 m |
| Monday 31/08 | 19.8 °C | 0.7 m |
| Tuesday 01/09 | 19.4 °C | 0.6 m |
| Wednesday 02/09 | 18.9 °C | 0.5 m |
| Thursday 03/09 | 19.1 °C | 0.4 m |
| Month | Average water |
|---|---|
| January | 15.5 °C |
| February | 15.2 °C |
| March | 15.1 °C |
| April | 16.2 °C |
| May | 16.5 °C |
| June | 18.3 °C |
| July | 18.1 °C |
| August | 17.8 °C |
| September | 17.0 °C |
| October | 18.4 °C |
| November | 17.6 °C |
| December | 16.2 °C |
Monthly averages for 2022–2025.
This page shows the water temperature at Tróia today and over the next seven days, so you can pick the best beach day before you go.
Sea temperature moves much more slowly than air temperature. A hot afternoon does not warm the ocean, and a windy day can cool it fast. Checking the water itself is the only reliable way to know what to expect.
Tróia occupies the peninsula across the Sado estuary from Setúbal, reached by ferry, with two coasts a few hundred metres apart. The estuary side is sheltered, shallow and clearly warmer, protected by the Serra da Arrábida across the water, while the ocean side is a long open beach facing west. That exposed side sits near 17.5 °C in August, so the choice of coast matters more here than the day of the week.
The water is warmest in October, averaging 18.4 °C, and coldest in March at 15.1 °C. Sheltered from the northerly wind by the Serra da Arrábida, this coast warms more than the exposed west and holds its warmth into early autumn.
The ocean gains and loses heat far more slowly than land, so it runs months behind the seasons. On top of that, the summer northerly wind pushes surface water offshore and draws cold deep water up in its place, which is why a heatwave on land so often coincides with a colder sea.
Dolphin-watching boats leave for the Sado estuary, where a resident bottlenose population lives year round, and the ferry crossing from Setúbal is a small trip in itself. The estuary side gives calm, warm water for swimming, paddleboarding and sailing, while the ocean side has open surf and long empty sand. The Roman fish-salting ruins sit a short walk from the beach.