Surf Forecasts:
Playa de Rio Sieira / As Furnas surf forecast from 31 Jul 2026:
- Best quality surf: Saturday 1 Aug, 11AM (local time) - 2.5ft (0.7m), 9s period, W swell with glassy winds.
- Most powerful swell: Tuesday 4 Aug, 5AM (local time) - 3.5ft (1.0m), 9s period, WSW swell with 166 kJ wave energy.
- Next surfable swell (1★+): Saturday 1 Aug, 11AM (local time) - 2.5ft (0.7m), 9s period with W swell.
Best Forecast Surf Conditions for Playa de Rio Sieira / As Furnas this week:
The surf forecast for Playa de Rio Sieira / As Furnas over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Aug 01) at 11AM. The primary swell is predicted to be 0.7m and 9s period with a secondary swell of 0.4m and 8s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Playa de Rio Sieira / As Furnas in the next 16 days are 1.0m 9s and forecast to arrive on Tuesday (Aug 04) at 5AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 2s period and expected on Monday (Aug 03) at 2PM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Sat 1st Aug) | 2.5ft (0.7m) 9s |
| Best Surf | 11AM (Sat 1st Aug) | 2.5ft (0.7m) 9s |
| Most Powerful | 5AM (Tue 4th Aug) | 3.5ft (1.0m) 9s |
Table - best surf conditions forecast for Playa de Rio Sieira / As Furnas over the next 16 days.
The Lowdown
Well folks, it’s Rusty here. Let me tell you straight: the next couple of weeks are pretty gutless for Playa de Rio Sieira / As Furnas. We’re looking at a real dry spell to kick things off, with barely a ripple on the cards for the first eight days. It’s a tough stretch, so don’t get your hopes up for any hero waves just yet.
The water is sitting at a balmy 70°, which is a solid 4° warmer than normal for this time of year—that’s a notable jump, and you’ll feel it in a summer wetsuit or even a springy.
The first chance of anything resembling a surf comes on Saturday morning, August 1st. The swell will be a tiny 2ft from the W, with an 8-second period. The glassy conditions will make it look pretty, but it’s really just a knee-high dribbler. Energy is weak at 93. It’s more of a float than a surf.
We’ll see a slight bump through the early week, with a similar story: small W swells in the 3ft range and clean conditions with light cross-off winds on the Monday and Tuesday. The energy ticks up to a moderate 106 and then 143, but honestly, the waves are still pretty ordinary.
By Sunday, August 9th, the forecast gets a little more interesting. We finally see a pulse of energy, with the combined energy jumping to 398 and the swell pushing up to 5ft from the WNW with an 8-second period. The morning looks clean with light cross-off winds. This is the standout of the whole window, but it's over a week away, so treat it as promising but not locked in. At 5ft, it’s heading into that zone that’s too much for beginners, but should be fun for the rest of us. Just be aware, the period is short, so it’ll be a bit crumbly and less organized. The afternoon sees it drop back to 3ft.
After that little pulse, it fades fast. The long-range forecast into mid-August is bleak, with nothing but tiny, windy slop from the NW. By the 14th and 15th, we’re down to 0.7ft and 1ft, with strong onshore and cross-shore winds, making it a complete write-off. This setup looks far more interesting for the kite surfers than for us paddle surfers. There’s a long gap of flatness from the 10th to the end of the window with no good options.
So, keep your board in the car for the 9th. It won't be perfect, but it's the only real chance we get. Hang in there.
Rusty
Short Range ForecastMostly dry. Warm (max 26°C on Fri afternoon, min 17°C on Fri morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 21°C on Mon afternoon, min 17°C on Mon morning). Wind will be generally light. | ||||||||||||||||||||
Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | WNW 9 | W 9 | W 9 | W 9 | W 9 | W 9 | W 10 | W 9 | W 9 | W 9 | W 8 | WSW 7 | W 8 | W 8 | W 8 | W 8 | W 8 | WNW 10 | W 10 | W 10 | W 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 27 | 39 | 80 | 71 | 41 | 41 | 65 | 80 | 102 | 97 | 72 | 99 | 134 | 103 | 84 | 49 | 43 | 33 | 50 | 49 | 45 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross | glassy | on | cross | cross-off | on | glassy | cross-off | cross-off | cross-off | cross-off | cross | off | glassy | cross-on | cross | glassy | on | cross |
High Tide | 6:10PM3.08m | 6:29AM2.80m | 6:42PM3.07m | 7:02AM2.79m | 7:16PM3.02m | 7:37AM2.75m | 7:52PM2.92m | 8:16AM2.68m | 8:33PM2.78m | 9:02AM2.59m | 9:23PM2.62m | 9:58AM2.49m | 10:28PM2.46m | ||||||||
Low Tide | 11:54AM0.32m | 00:23AM0.26m | 12:27PM0.31m | 00:55AM0.26m | 1:01PM0.34m | 1:29AM0.30m | 1:37PM0.42m | 2:05AM0.38m | 2:17PM0.52m | 2:47AM0.50m | 3:06PM0.66m | 3:38AM0.66m | 4:08PM0.79m | 4:45AM0.79m | |||||||
 | |  | | | | |  |  | | | | | | | | | | | | | |
 | 7:26 | — | — | 7:26 | — | — | 7:28 | — | — | 7:28 | — | — | 7:30 | — | — | 7:31 | — | — | 7:31 | — | — |
 | — | — | 9:58 | — | — | 9:57 | — | — | 9:54 | — | — | 9:53 | — | — | 9:52 | — | — | 9:52 | — | — | 9:51 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 20 | 26 | 25 | 22 | 24 | 24 | 18 | 19 | 20 | 19 | 21 | 21 | 20 | 20 | 20 | 19 | 20 | 21 | 21 | 22 | 25 |
Feels °C | 20 | 22 | 22 | 23 | 24 | 25 | 19 | 20 | 20 | 19 | 20 | 21 | 22 | 20 | 22 | 21 | 20 | 21 | 22 | 20 | 23 |
Swell 1 Height (m) Direction Period (s) | WNW 9 | W 9 | W 9 | W 9 | W 9 | W 9 | W 10 | W 9 | W 9 | W 9 | W 8 | WSW 7 | W 8 | W 8 | W 8 | W 8 | W 8 | W 7 | W 7 | W 10 | W 9 |
| kJ | 27 | 39 | 80 | 71 | 41 | 41 | 65 | 80 | 102 | 97 | 72 | 99 | 134 | 103 | 84 | 49 | 43 | 22 | 21 | 49 | 45 |
Swell 2 Height (m) Direction Period (s) | W 12 | — | NNW 8 | NNW 8 | WSW 8 | WSW 8 | WSW 8 | NNW 7 | NNW 7 | N 8 | WNW 9 | W 9 | SW 13 | SW 13 | SW 13 | W 10 | W 10 | WNW 10 | W 10 | WNW 6 | WSW 5 |
| kJ | 11 | — | 7 | 22 | 22 | 21 | 11 | 5 | 5 | 1 | 28 | 56 | 7 | 7 | 7 | 18 | 31 | 33 | 50 | 14 | 11 |
Swell 3 Height (m) Direction Period (s) | N 9 | — | N 9 | — | NNW 7 | NNW 7 | NNW 7 | — | NNW 3 | SW 15 | SW 15 | SW 14 | N 9 | W 11 | N 8 | SW 12 | SW 12 | SW 12 | SW 12 | SW 5 | WNW 6 |
| kJ | 2 | — | 2 | — | 5 | 5 | 5 | — | 1 | 8 | 8 | 8 | 2 | 2 | 1 | 6 | 6 | 6 | 6 | 4 | 8 |
Wind waves Height (m) Direction Period (s) | NNW 7 | NNW 4 | N 5 | — | NNW 3 | NNW 4 | — | NW 2 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 5 | 16 | 21 | — | 8 | 5 | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 92 | 92 | 24 | 0 | 9 | 24 | 0 | 46 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 80 | 42 | 0 | 92 | 46 |
Best forecast wave conditions in Galicia | |||||||||||||||||||||
Best forecast wave conditions in Spain (Europe) | |||||||||||||||||||||
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Information about the Playa de Rio Sieira / As Furnas Surf forecast
The above surf forecast table for Playa de Rio Sieira / As Furnas provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Playa de Rio Sieira / As Furnas can be found by selecting the local surf guide option on the grey menu. Our Playa de Rio Sieira / As Furnas surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Playa de Rio Sieira / As Furnas) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Playa de Rio Sieira / As Furnas may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Are you planning a holiday in Galicia? If you are looking for accommodation near Playa de Rio Sieira / As Furnas, camping, hotels and holiday cottages in Galicia, consider staying in Boiro which is 12 km (7 miles) away. Other places in and around Galicia where you can find information about places to rent, and car hire include Muros which is 16 km (10 miles) away, Villagarcia, Sanxenxo and Poio.
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