Surf Forecasts:
Foz do Arelho surf forecast from 16 Aug 2026:
- Best quality surf: Monday 17 Aug, 10AM (local time) - 5.5ft (1.7m), 8s period, NNW swell with glassy winds.
- Most powerful swell: Friday 21 Aug, 1PM (local time) - 6.5ft (2.0m), 10s period, NNW swell with 839 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 10AM (local time) - 5.5ft (1.7m), 8s period with NNW swell.
Best Forecast Surf Conditions for Foz do Arelho this week:
The surf forecast for Foz do Arelho over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 17) at 10AM. The primary swell is predicted to be 1.7m and 8s period with a secondary swell of 0.1m and 15s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Foz do Arelho in the next 16 days are 2.0m 10s and forecast to arrive on Friday (Aug 21) at 1PM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Mon 17th Aug) | 5.5ft (1.7m) 8s |
| Best Surf | 10AM (Mon 17th Aug) | 5.5ft (1.7m) 8s |
| Most Powerful | 1PM (Fri 21st Aug) | 6.5ft (2.0m) 10s |
Table - best surf conditions forecast for Foz do Arelho over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what Foz do Arelho has cookin’ over the next couple of weeks.
The honest truth is, this run is a tough one. We’ve got a real slow start with barely anything worth paddling out for. The first real chance you’ve got is on Monday the 17th, but it’s a very specific window.
For the full 16 days, there isn’t a single standout session that’s got me shouting from the sand. The best on offer is that Monday morning. We’ll see a clean, NNW swell rolling in at about 6 ft, period a short 8 seconds. The energy is moderate at best (353). What makes it interesting is the wind – glassy, slight air, dead calm. That’s a rare treat, so if you’re a beginner looking for a clean, mellow paddle, that’s your window. Be aware, though, this spot can be inconsistent and sometimes crowded, so don’t expect perfection.
The water temp is sitting at 67°F, which is a bit colder than normal for this time of year, so you’ll want a decent wetsuit.
After that morning, the wind cops a northwesterly turn on Monday afternoon, going onshore and messing things up. Tuesday the 18th morning cleans up a bit with a cross-offshore breeze and 5 ft swell but the energy drops off (302). Tuesday afternoon gets blown out again.
The rest of the first week and into the second week is plagued by a persistent cross-onshore or onshore wind from the north or north-northwest, kicking up chop and making conditions poor. There’s a few small windows on the 25th and 31st with small, weak swell (3 ft and 5 ft respectively) and clean wind, but they’re just surfable, not exciting.
The period between the 19th and the 31st of August is mostly a write-off for quality surf. The swell sticks to that short-period NNW pulse, and the wind just won’t give us a break. If you’re keen on getting wet regardless, keep an eye on those early morning windows, but don’t expect any magic.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Mon morning, min 20°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 22°C on Wed afternoon, min 18°C on Fri night). Winds decreasing (fresh winds from the NNW on Thu night, light winds from the NNW by Sat morning). | |||||||||||||||||||
Sun 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | ||||||||||||||
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) | NNW 8 | NNW 7 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 7 | NNW 6 | NNW 7 | NNW 8 | NNW 7 | NNW 7 | NNW 10 | NNW 10 | NNW 10 | NNW 9 | NNW 9 |
Wave Graph | ||||||||||||||||||||
300 | 234 | 344 | 245 | 257 | 291 | 201 | 183 | 110 | 79 | 49 | 173 | 353 | 325 | 363 | 622 | 394 | 301 | 271 | 208 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | glassy | on | glassy | cross-off | cross | cross-off | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-off |
High Tide | 6:04PM2.92m | 6:26AM2.64m | 6:43PM2.68m | 7:04AM2.47m | 7:24PM2.41m | 7:47AM2.29m | 8:11PM2.16m | 8:39AM2.12m | 9:14PM1.96m | 9:52AM2.01m | 10:43PM1.86m | 11:24AM2.01m | 00:12AM1.92m | |||||||
Low Tide | 00:15AM0.23m | 12:26PM0.36m | 00:51AM0.45m | 1:07PM0.57m | 1:30AM0.68m | 1:53PM0.79m | 2:14AM0.90m | 2:52PM0.98m | 3:17AM1.07m | 4:19PM1.09m | 4:49AM1.14m | 5:57PM1.05m | ||||||||
— | — | 6:50 | — | — | 6:50 | — | — | 6:52 | — | — | 6:52 | — | — | 6:54 | — | — | 6:54 | — | — | |
8:31 | — | — | 8:30 | — | — | 8:29 | — | — | 8:28 | — | — | 8:25 | — | — | 8:24 | — | — | 8:22 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 |
Temp °C | 25 | 22 | 27 | 24 | 21 | 24 | 22 | 21 | 22 | 22 | 20 | 20 | 19 | 19 | 20 | 20 | 19 | 20 | 21 | 20 |
Feels °C | 24 | 21 | 25 | 24 | 22 | 24 | 20 | 25 | 23 | 21 | 21 | 19 | 16 | 15 | 17 | 17 | 16 | 19 | 19 | 21 |
Swell 1 Height (m) Direction Period (s) | W 16 | NNW 7 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 7 | NNW 6 | WNW 9 | W 9 | NNW 12 | NNW 11 | NNW 10 | NNW 10 | NNW 10 | W 9 | W 8 |
5 | 234 | 344 | 245 | 257 | 291 | 201 | 183 | 110 | 79 | 42 | 61 | 40 | 215 | 281 | 622 | 394 | 301 | 83 | 68 | |
Swell 2 Height (m) Direction Period (s) | — | WNW 7 | SW 15 | W 9 | W 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | NW 10 | WNW 9 | NW 12 | NW 12 | W 9 | WNW 9 | WNW 8 | WNW 8 | W 8 | SW 14 | SW 14 |
— | 5 | 9 | 6 | 5 | 6 | 6 | 13 | 12 | 27 | 49 | 6 | 34 | 39 | 25 | 24 | 24 | 33 | 8 | 8 | |
Swell 3 Height (m) Direction Period (s) | — | W 15 | — | SW 15 | SW 16 | W 16 | SW 16 | SW 15 | SW 14 | WNW 8 | SW 13 | SW 13 | SW 13 | SW 15 | W 12 | WNW 12 | WNW 11 | WNW 10 | — | — |
— | 4 | — | 9 | 11 | 5 | 10 | 8 | 8 | 6 | 7 | 7 | 7 | 8 | 12 | 28 | 23 | 33 | — | — | |
Wind waves Height (m) Direction Period (s) | NNW 8 | — | — | — | — | — | WSW 4 | — | — | — | — | NNW 7 | NNW 8 | NNW 7 | NNW 7 | — | — | — | NNW 9 | NNW 9 |
300 | — | — | — | — | — | 13 | — | — | — | — | 173 | 353 | 325 | 363 | — | — | — | 271 | 208 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 241 | 82 | 0 | 272 | 0 | 0 | 792 | 0 | 11 | 251 | 17 | 84 | 378 | 212 | 248 | 349 | 84 | 17 | 349 | 0 |
Best forecast wave conditions in Peniche | ||||||||||||||||||||
Best forecast wave conditions in Portugal | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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Information about the Foz do Arelho Surf forecast
The above surf forecast table for Foz do Arelho provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Foz do Arelho can be found by selecting the local surf guide option on the grey menu. Our Foz do Arelho 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 (Foz do Arelho) 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 Foz do Arelho 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.
Foz do Arelho is 9 km (6 miles) from Caldad da Rainha. If you plan a holiday in Peniche, look for hotels and other accommodation in Caldad da Rainha. Caldad da Rainha has rooms for a wide range of budgets as well as car hire and transport links.











