Surf Forecasts:
The Reef surf forecast from 25 Aug 2026:
- Best quality surf: Friday 28 Aug, 4AM (local time) - 8ft (2.4m), 11s period, WNW swell with cross-offshore winds.
- Most powerful swell: Friday 28 Aug, 7AM (local time) - 8ft (2.5m), 11s period, WNW swell with 1,663 kJ wave energy.
- Next surfable swell (1★+): Friday 28 Aug, 1AM (local time) - 6ft (1.9m), 9s period with WNW swell.
Best Forecast Surf Conditions for The Reef this week:
The surf forecast for The Reef over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 28) at 1AM. The primary swell is predicted to be 1.9m and 9s period with a secondary swell of 0.8m and 11s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at The Reef in the next 16 days are 2.5m 11s and forecast to arrive on Friday (Aug 28) at 7AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 16s period and expected on Tuesday (Sep 01) at 7AM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Fri 28th Aug) | 6ft (1.9m) 9s |
| Best Surf | 4AM (Fri 28th Aug) | 8ft (2.4m) 11s |
| Most Powerful | 7AM (Fri 28th Aug) | 8ft (2.5m) 11s |
Table - best surf conditions forecast for The Reef over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a proper look at what’s on offer for The Reef. It’s a bit of a mixed bag, so let’s get into it.
Right off the bat, we’ve got some swell on the way, but don’t get too excited just yet. Tuesday the 25th kicks off with a small, short-period 4ft swell from the WNW, period a measly 7 seconds. The energy reading is only 173 (weak). The saving grace is a glassy south-southwest wind, so it’s clean but pretty average. That’s about it for the first few days – the combination of onshore wind and messy conditions makes for poor surf through Wednesday, Thursday, and into the weekend. There’s a lot of strong wind in the water with onshore and cross-shore stuff messing it up.
Now, hold onto your boards. On Friday the 28th morning, we get a real taste of what The Reef can do. A clean 8ft swell from the WNW, period stretches to 11 seconds, giving it proper groundswell power. The combined energy jumps to a strong 1570 (moderate to strong). With a light NNE wind, it’s cross-offshore and glassy. That’s the standout window – excellent surf but it’s hefty at 8ft, so only the experienced crew should be out there. The crowd situation is “often”, so expect company.
After that, the wind swings back cross-shore and freshens up. We get some rideable swell through the end of August and into the first week of September, but it’s always fighting lumpy, cross-shore wind. There’s a bit of a pulse around the 1st of September with 8ft NNW swell and 11-second period, but that 30 km/h north cross-breeze keeps it from being clean.
The real highlight, though, is shaping up for the second week. On Monday the 7th of September afternoon, we see a long-period 5ft swell from the west with a period of 21 seconds and a strong energy reading of 2323 (strong). That’s very long period, and on a reef setup, it’s going to draw some beautiful, walling lines – but expect long lulls between sets. Then, on Tuesday the 8th of September morning, it really hits: a solid 12ft NW swell with 14-second period and energy at 5085 (very strong). That’s big, powerful water and only for the experts. Wind is moderate cross-shore, so it’s not perfect, but the power will be there. This is the big one to circle on your calendar, but keep in mind it’s still a week and a half out, so treat it as a promising but not locked-in call.
To wrap it up: The only real standouts are Friday the 28th August morning for a clean, powerful session, and that very long period west swell on Monday the 7th and Tuesday the 8th of September. Everything else is just waiting on a better wind window.
Rusty.
Short Range ForecastModerate rain (total 18mm), heaviest on Wed morning. Warm (max 22°C on Tue morning, min 18°C on Wed night). Winds decreasing (fresh winds from the W on Thu morning, calm by Thu night). | Days 4-6 Weather SummaryMostly dry. Warm (max 21°C on Sun morning, min 17°C on Fri night). Mainly fresh winds. | ||||||||||||||||||||
Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | |||||||||||||||
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 7 | WNW 7 | WNW 6 | WSW 6 | W 7 | W 8 | W 7 | W 8 | WNW 9 | WNW 11 | WNW 10 | NW 9 | NW 9 | NW 8 | NW 8 | NW 8 | NW 8 | NW 10 | NW 9 | NW 9 | NNW 9 |
Wave Graph | |||||||||||||||||||||
166 | 135 | 57 | 84 | 287 | 377 | 475 | 471 | 522 | 1435 | 1092 | 542 | 336 | 256 | 140 | 119 | 135 | 365 | 388 | 363 | 450 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | cross-on | on | cross-on | on | on | glassy | cross-off | cross | cross | cross | cross | cross | cross | cross-on | cross | cross | cross | cross |
High Tide | 2:08PM2.54m | 2:30AM2.42m | 2:43PM2.72m | 3:03AM2.57m | 3:15PM2.87m | 3:34AM2.69m | 3:46PM2.98m | 4:05AM2.78m | 4:17PM3.03m | 4:37AM2.82m | 4:50PM3.02m | 5:10AM2.82m | 5:24PM2.94m | ||||||||
Low Tide | 8:24PM0.55m | 8:28AM0.54m | 8:57PM0.38m | 9:01AM0.39m | 9:28PM0.24m | 9:32AM0.26m | 9:59PM0.14m | 10:04AM0.19m | 10:29PM0.09m | 10:37AM0.16m | 11:01PM0.10m | 11:11AM0.19m | 11:35PM0.18m | ||||||||
6:58 | — | — | 7:00 | — | — | 7:01 | — | — | 7:01 | — | — | 7:03 | — | — | 7:03 | — | — | 7:05 | — | — | |
— | 8:19 | — | — | 8:17 | — | — | 8:15 | — | — | 8:15 | — | — | 8:13 | — | — | 8:12 | — | — | 8:09 | — | |
mm | — | — | 1 | 8 | — | 5 | 3 | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 22 | 21 | 21 | 21 | 20 | 20 | 21 | 20 | 20 | 20 | 18 | 20 | 20 | 18 | 21 | 21 | 20 | 20 | 20 | 17 |
Feels °C | 21 | 21 | 21 | 19 | 18 | 19 | 15 | 18 | 20 | 17 | 15 | 14 | 17 | 17 | 16 | 21 | 21 | 19 | 17 | 16 | 12 |
Swell 1 Height (m) Direction Period (s) | WNW 7 | WNW 7 | WNW 6 | NNW 6 | SW 11 | W 8 | SW 11 | SW 11 | WNW 9 | WNW 11 | WNW 10 | NW 9 | NW 9 | S 10 | NW 8 | NW 8 | NW 8 | NW 10 | SW 18 | NW 14 | NW 12 |
166 | 135 | 57 | 15 | 5 | 377 | 5 | 5 | 522 | 1435 | 1092 | 542 | 336 | 2 | 140 | 119 | 135 | 365 | 12 | 8 | 89 | |
Swell 2 Height (m) Direction Period (s) | N 7 | SW 12 | NW 11 | NW 10 | — | SW 11 | — | — | WNW 11 | — | — | — | S 10 | — | — | W 13 | NNW 11 | S 10 | S 10 | SW 17 | SW 16 |
1 | 6 | 5 | 4 | — | 5 | — | — | 170 | — | — | — | 2 | — | — | 3 | 13 | 2 | 2 | 11 | 10 | |
Swell 3 Height (m) Direction Period (s) | SW 12 | W 10 | W 10 | W 9 | — | — | — | — | NW 11 | — | — | — | — | — | — | S 12 | W 12 | — | NW 15 | S 9 | S 9 |
6 | 2 | 2 | 2 | — | — | — | — | 41 | — | — | — | — | — | — | 3 | 3 | — | 9 | 2 | 2 | |
Wind waves Height (m) Direction Period (s) | — | — | — | WSW 6 | W 7 | — | W 7 | W 8 | — | — | — | — | — | NW 8 | NNW 4 | — | — | NNW 4 | NW 9 | NW 9 | NNW 9 |
— | — | — | 84 | 287 | — | 475 | 471 | — | — | — | — | — | 256 | 25 | — | — | 24 | 388 | 363 | 450 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 26 | 0 | 48 | 52 | 489 | 418 | 48 | 291 | 215 | 26 | 0 | 30 | 26 | 26 | 411 | 106 | 26 | 406 | 26 | 119 | 406 |
Best forecast wave conditions in Ericeira | |||||||||||||||||||||
Best forecast wave conditions in Portugal | |||||||||||||||||||||
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Information about the The Reef Surf forecast
The above surf forecast table for The Reef provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at The Reef can be found by selecting the local surf guide option on the grey menu. Our The Reef 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 (The Reef) 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 The Reef 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.
The Reef is 15 km (9 miles) from the city of Sintra. If you plan a holiday in Ericeira, look for hotels and other accommodation in Sintra. Sintra has rooms for a wide range of budgets as well as car hire and transport links.











