- Temperature
- Feels like
- Rain
- Wind
- Sea water
- Waves
- Updated
Sea water: 18.8°C, practically unchanged all week
Waves: 0.8m
At 18.8 °C the water in Comporta is fresh. Fine for a dip, but the first minute bites.
Sunrise: 07:42 · Sunset: 19:00 · Day length: 11h 18m
| Day | Sea water | Waves |
|---|---|---|
| Monday 12/10 | 18.8 °C | 0.8 m |
| Tuesday 13/10 | 18.8 °C | 0.8 m |
| Wednesday 14/10 | 18.8 °C | 0.9 m |
| Thursday 15/10 | 18.8 °C | 1.0 m |
| Friday 16/10 | 19.0 °C | 1.0 m |
| Saturday 17/10 | 18.7 °C | 1.0 m |
| Sunday 18/10 | 18.5 °C | 0.9 m |
| Month | Average water |
|---|---|
| January | 15.6 °C |
| February | 15.2 °C |
| March | 15.1 °C |
| April | 16.1 °C |
| May | 16.5 °C |
| June | 18.4 °C |
| July | 18.1 °C |
| August | 17.7 °C |
| September | 17.1 °C |
| October | 18.5 °C |
| November | 17.8 °C |
| December | 16.3 °C |
Monthly averages for 2022–2025.
This page shows the water temperature at Comporta 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.
Comporta lies on the Tróia sand spit south of Setúbal, with rice paddies and umbrella pines behind long, near-empty ocean sand. The beach faces west into the open Atlantic with no headland to shelter it, so the water stays fresh at about 17.5 °C in August despite the heat of the plain behind. The sand runs for kilometres with few access points, which is why the crowds thin out within a short walk.
The water is warmest in October, averaging 18.5 °C, and coldest in March at 15.1 °C. On the Alentejo and Vicentina coast the sea behaves like the west coast, with summer upwelling keeping the water cool even in August, so the warmest readings arrive in early autumn once the nortada eases. River-mouth beaches such as Milfontes and Odeceixe run a few degrees warmer than the open ocean.
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.
This is a beach for walking and swimming rather than for equipment hire, with kilometres of open sand and very few people once you leave the access points. The surf is honest west-coast Atlantic, good for boards and lively for swimmers, and horse riding along the sand is a local tradition. Behind the dunes the rice paddies and pine woods make for flat, easy cycling.