Surf Forecasts:
Santo Amaro surf forecast from 18 Aug 2026:
- Best quality surf: Friday 21 Aug, 10AM (local time) - 3ft (0.9m), 11s period, NW swell with offshore winds.
- Most powerful swell: Friday 21 Aug, 10AM (local time) - 3ft (0.9m), 11s period, NW swell with 172 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 10AM (local time) - 3ft (0.9m), 11s period with NW swell.
Best Forecast Surf Conditions for Santo Amaro this week:
The surf forecast for Santo Amaro over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 21) at 10AM. The primary swell is predicted to be 0.9m and 11s period with a secondary swell of 0.2m and 15s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Santo Amaro in the next 16 days are 0.9m 11s and forecast to arrive on Friday (Aug 21) at 10AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 9s period and expected on Sunday (Aug 23) at 1AM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Fri 21st Aug) | 3ft (0.9m) 11s |
| Best Surf | 10AM (Fri 21st Aug) | 3ft (0.9m) 11s |
| Most Powerful | 10AM (Fri 21st Aug) | 3ft (0.9m) 11s |
Table - best surf conditions forecast for Santo Amaro over the next 16 days.
The Lowdown
Alright, folks, Rusty here.
First up, this is a rough stretch ahead for the Santo Amaro point break. We're looking at a long, drawn-out period of tiny to flat surf with mostly ordinary to poor conditions. The water temp is sitting right on the seasonal average at 69° – nothing unusual there.
The first week is a write-off. From Tuesday the 18th right through to Sunday the 23rd of August, you’re looking at knee-high slop at best, with barely any energy in the water. The combined swell energy stays below 100 (weak) for most of it. There’s a brief moment on Thursday morning the 20th where the wind goes glassy, but the swell is just 2ft from the WNW. It’s clean, but there's nothing to ride.
Friday the 21st of August morning sees a bump – 3ft from the NW with a moderate offshore wind. The combined energy hits a moderate 193. But the comment says it’s surfable but very ordinary. It’s a slight glimmer, but not worth getting excited about.
The whole week after that sinks right back into tiny, weak surf with fresh offshore winds that will make the water look nice but won’t have a wave to push you. We’re talking about a gap of nearly seven days where there’s nothing recommended.
Now, finally, we get a true standout. Look to Friday the 28th of August morning. Santo Amaro wakes up with a solid 5ft swell from the NW, a period of 9 seconds, and a strong moderate offshore breeze from the N. The combined energy jumps to a proper 338 (moderate to strong). The report actually says “expect good surf conditions.” This is the pick of the forecast. It's got size, it's clean, and the direction (NW) lines up nicely with the optimum SW direction for this exposed point.
Saturday the 29th of August morning is also worth a mention – similar 5ft from the NW with offshore N winds and energy at 449. Another solid window, though the wind is a touch stronger. The afternoon gets a bit questionable on the tide.
If you’re an advanced surfer, the stand-alone session is Friday the 28th morning. That’s your window. After that, it fades away again quickly into the first week of September. Promising, but a long wait to get there.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Wed afternoon, min 18°C on Thu night). Winds increasing (calm on Wed night, fresh winds from the NNW by Thu afternoon). | Days 4-6 Weather SummaryMostly dry. Warm (max 22°C on Fri morning, min 17°C on Sun night). Mainly fresh winds. | ||||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | |||||||||||||||
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) | W 8 | SW 16 | SSW 15 | SSW 14 | WNW 10 | WNW 10 | WNW 9 | WNW 9 | SSW 15 | NW 11 | SSW 14 | SSW 14 | WNW 8 | SSW 14 | SSW 14 | SW 13 | SW 13 | SW 13 | SW 13 | W 8 | W 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 7 | 38 | 21 | 20 | 21 | 51 | 62 | 61 | 21 | 172 | 21 | 18 | 24 | 20 | 20 | 7 | 7 | 7 | 7 | 7 | 6 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | glassy | on | cross | cross-off | glassy | cross-off | off | off | cross-off | off | off | cross-off | cross-off | off | cross-off | off | off | cross-off | off |
High Tide | 7:11PM2.36m | 7:34AM2.24m | 7:59PM2.11m | 8:27AM2.07m | 9:03PM1.91m | 9:42AM1.96m | 10:34PM1.82m | 11:14AM1.96m | 00:02AM1.88m | 12:28PM2.09m | 1:02AM2.02m | 1:19PM2.27m | 1:45AM2.19m | ||||||||
Low Tide | 12:53PM0.57m | 1:16AM0.67m | 1:39PM0.78m | 2:01AM0.89m | 2:39PM0.97m | 3:04AM1.06m | 4:08PM1.07m | 4:38AM1.12m | 5:47PM1.03m | 6:06AM1.04m | 6:53PM0.89m | 7:02AM0.88m | 7:38PM0.71m | ||||||||
 | |  | | | |  | | | | | | | | | | | | | | | |
 | 6:52 | — | — | 6:54 | — | — | 6:54 | — | — | 6:56 | — | — | 6:56 | — | — | 6:56 | — | — | 6:58 | — | — |
 | — | 8:28 | — | — | 8:27 | — | — | 8:24 | — | — | 8:23 | — | — | 8:22 | — | — | 8:21 | — | — | 8:20 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 24 | 22 | 24 | 25 | 22 | 25 | 24 | 19 | 22 | 22 | 19 | 22 | 22 | 19 | 22 | 22 | 18 | 23 | 22 | 18 |
Feels °C | 25 | 24 | 23 | 23 | 25 | 23 | 25 | 22 | 15 | 18 | 17 | 16 | 17 | 17 | 16 | 17 | 16 | 14 | 18 | 17 | 15 |
Swell 1 Height (m) Direction Period (s) | NNW 8 | NNW 8 | NNW 8 | NNW 7 | NNW 7 | NNW 6 | NNW 5 | WNW 9 | SSW 15 | NW 11 | SSW 14 | SSW 14 | WNW 8 | SSW 14 | SSW 14 | SW 13 | SW 13 | SW 13 | W 8 | W 8 | W 8 |
| kJ | 243 | 237 | 159 | 94 | 72 | 34 | 19 | 61 | 21 | 172 | 21 | 18 | 24 | 20 | 20 | 7 | 7 | 7 | 1 | 5 | 5 |
Swell 2 Height (m) Direction Period (s) | W 8 | SW 16 | WNW 8 | WNW 8 | WNW 8 | WNW 10 | WNW 9 | NW 11 | SW 12 | SSW 15 | W 11 | — | SSW 14 | SSW 14 | W 9 | — | — | W 9 | SW 13 | SW 13 | SW 12 |
| kJ | 5 | 38 | 13 | 12 | 11 | 51 | 62 | 19 | 6 | 21 | 10 | — | 20 | 20 | 6 | — | — | 2 | 7 | 7 | 6 |
Swell 3 Height (m) Direction Period (s) | SW 14 | W 8 | SSW 15 | SSW 14 | WNW 10 | SSW 4 | SSW 4 | SSW 13 | — | — | — | — | — | — | — | — | — | — | SW 13 | — | W 11 |
| kJ | 7 | 5 | 21 | 20 | 21 | 3 | 2 | 17 | — | — | — | — | — | — | — | — | — | — | 7 | — | 2 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | NW 5 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 9 | NNW 9 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 7 |
| kJ | — | — | — | — | — | — | — | 25 | 489 | 337 | 590 | 667 | 931 | 933 | 1125 | 1259 | 866 | 887 | 662 | 322 | 214 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 15 | 15 | 1 | 15 | 77 | 5 | 1 | 434 | 434 | 0 | 529 | 255 | 585 | 482 | 483 | 897 | 356 | 201 | 320 | 478 | 320 |
Best forecast wave conditions in Lisboa | |||||||||||||||||||||
Best forecast wave conditions in Portugal | |||||||||||||||||||||
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Information about the Santo Amaro Surf forecast
The above surf forecast table for Santo Amaro provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Santo Amaro can be found by selecting the local surf guide option on the grey menu. Our Santo Amaro 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 (Santo Amaro) 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 Santo Amaro 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.
Santo Amaro is 2 km (1 miles) from Carcavelos. If you plan a holiday in Lisboa, look for hotels and other accommodation in Carcavelos. Carcavelos has rooms for a wide range of budgets as well as car hire and transport links.
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