Surf Forecasts:
The Reef surf forecast from 19 Aug 2026:
- Best quality surf: Thursday 20 Aug, 1AM (local time) - 1.5ft (0.5m), 9s period, WNW swell with glassy winds.
- Most powerful swell: Friday 21 Aug, 1PM (local time) - 7ft (2.2m), 10s period, NNW swell with 1,020 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 1AM (local time) - 1.5ft (0.5m), 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 Thursday (Aug 20) at 1AM. The primary swell is predicted to be 0.5m and 9s period with a secondary swell of 0.7m and 6s. 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 2.2m 10s and forecast to arrive on Friday (Aug 21) at 1PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 15s period and expected on Thursday (Aug 20) at 10PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Thu 20th Aug) | 1.5ft (0.5m) 9s |
| Best Surf | 1AM (Thu 20th Aug) | 1.5ft (0.5m) 9s |
| Most Powerful | 1PM (Fri 21st Aug) | 7ft (2.2m) 10s |
Table - best surf conditions forecast for The Reef over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s have a look at what’s coming our way for The Reef over the next couple of weeks.
Right off the bat, I gotta be straight with you – the first week is a bit of a grind. We’ve got a pulse of swell, but the wind is just never playing ball. The Reef is exposed to the NW, and that’s exactly where the wind is coming from for most of this period. It’s a real shame because there’s some decent size in the water.
Starting Wednesday, August 19th, it’s small and messy. Thursday the 20th is more of the same, just weak. Friday the 21st through to Monday the 24th, we see a solid rise in swell, with waves hitting 6.6 ft to 7.9 ft from the NNW. That’s a nice size for The Reef, but the wind is a fresh cross or cross-onshore breeze, making it lumpy and choppy. The combined energy is moderate to strong (689 to 894), but the quality is just poor. This setup looks more interesting for kite surfing than paddle surfing, to be honest.
We get a bit of a lull Tuesday the 25th and Wednesday the 26th, with the swell dropping back under 3.3 ft, and the energy is weak (86 and 60). Still not clean.
Now, things start to get interesting towards the end of the month. Thursday, August 27th afternoon brings a bigger pulse, 7.5 ft from the NW with a period bumping up to 11 seconds. The combined energy jumps to 1285, which is strong. But that cross-wind is still there, lumping it up. It’s a marginal call.
Friday, August 28th morning is similar – 6.6 ft, NNW, but still a cross-wind.
The real standout, the one you want to circle on your calendar, is Monday, September 1st. We’ve got a powerful groundswell arriving. The morning shows 8.2 ft from the NNW with a period of 12 seconds, and the energy is a massive 2205. The afternoon pushes even bigger to 9.8 ft. This is serious, expert-only territory – over 8.2 ft, you need to know what you’re doing. The period is long, so it’ll be better shaped and have more power, but that long period can make it break a bit straight at a reef. The downside? The wind is still a fresh cross-shore, keeping it lumpy. It’s a marginal call, but the raw power is undeniable.
But the best of the best? That’s Wednesday, September 2nd morning. The swell drops back to a still-juicy 6.6 ft from the NNW with an 11-second period and strong energy (922). But the wind switches to a light cross-offshore from the NNE. That’s clean, glassy conditions. For the first time in the whole forecast, The Reef will be looking absolutely perfect. The score is the highest of the run, and it’s the only time we get that clean wind. That’s your session. Make it happen.
After that, the swell drops off and the wind goes back onshore, so don’t sleep on the 2nd.
Short Range ForecastMostly dry. Warm (max 22°C on Wed morning, min 18°C on Thu night). Winds increasing (calm on Wed night, fresh winds from the NNW by Fri afternoon). | Days 4-6 Weather SummaryMostly dry. Warm (max 21°C on Sun morning, min 18°C on Fri night). Mainly fresh winds. | ||||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | |||||||||||||||
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) | NNW 7 | NNW 7 | WNW 9 | WNW 9 | WNW 9 | NNW 7 | NNW 8 | NNW 10 | NNW 8 | NNW 8 | NNW 9 | NNW 8 | NNW 9 | NNW 9 | NNW 8 | NNW 8 | NNW 7 | NNW 7 | NNW 7 | NNW 7 | NW 6 |
Wave Graph | |||||||||||||||||||||
94 | 68 | 50 | 62 | 61 | 310 | 447 | 961 | 607 | 801 | 637 | 705 | 887 | 725 | 731 | 592 | 280 | 124 | 79 | 51 | 43 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | glassy | cross-on | cross-on | cross | cross | cross | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-on | cross-on |
High Tide | 7:44AM2.32m | 8:08PM2.18m | 8:37AM2.15m | 9:12PM1.98m | 9:50AM2.03m | 10:42PM1.88m | 11:22AM2.03m | 00:11AM1.94m | 12:36PM2.16m | 1:11AM2.08m | 1:28PM2.34m | 1:54AM2.25m | 2:08PM2.54m | 2:30AM2.42m | |||||||
Low Tide | 1:50PM0.80m | 2:12AM0.91m | 2:50PM1.00m | 3:15AM1.09m | 4:18PM1.11m | 4:48AM1.16m | 5:56PM1.07m | 6:14AM1.07m | 7:03PM0.92m | 7:12AM0.91m | 7:48PM0.74m | 7:53AM0.72m | 8:24PM0.55m | ||||||||
6:54 | — | — | 6:54 | — | — | 6:56 | — | — | 6:56 | — | — | 6:56 | — | — | 6:58 | — | — | 6:58 | — | — | |
— | 8:27 | — | — | 8:25 | — | — | 8:24 | — | — | 8:22 | — | — | 8:22 | — | — | 8:20 | — | — | 8:19 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 22 | 20 | 22 | 21 | 19 | 19 | 20 | 18 | 20 | 20 | 19 | 21 | 20 | 20 | 20 | 21 | 19 | 20 | 20 | 19 |
Feels °C | 23 | 22 | 21 | 21 | 19 | 14 | 14 | 15 | 13 | 16 | 16 | 15 | 18 | 16 | 16 | 17 | 19 | 17 | 19 | 19 | 18 |
Swell 1 Height (m) Direction Period (s) | NNW 7 | NNW 7 | NNW 6 | NNW 5 | WNW 9 | WNW 9 | NNW 11 | SSW 15 | NNW 12 | WNW 9 | WNW 9 | WNW 8 | SW 13 | SW 13 | SW 13 | SW 13 | W 9 | W 8 | NNW 7 | W 7 | NW 5 |
94 | 68 | 32 | 24 | 61 | 44 | 242 | 21 | 106 | 27 | 25 | 14 | 7 | 7 | 7 | 7 | 1 | 1 | 79 | 1 | 18 | |
Swell 2 Height (m) Direction Period (s) | WNW 8 | NW 10 | WNW 9 | WNW 9 | NW 11 | NW 12 | SSW 15 | — | WNW 9 | SSW 14 | SSW 14 | SSW 14 | — | — | — | — | SW 13 | SW 12 | W 8 | W 10 | W 10 |
12 | 27 | 50 | 62 | 30 | 37 | 21 | — | 17 | 20 | 20 | 20 | — | — | — | — | 7 | 6 | 1 | 2 | 2 | |
Swell 3 Height (m) Direction Period (s) | SW 14 | WNW 8 | SSW 13 | NNW 12 | SW 13 | NNW 10 | — | — | SSW 14 | — | — | — | — | — | — | — | — | W 11 | SW 12 | SW 12 | W 7 |
33 | 12 | 17 | 14 | 7 | 10 | — | — | 18 | — | — | — | — | — | — | — | — | 2 | 6 | 6 | 1 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | NNW 5 | NNW 7 | NNW 8 | NNW 10 | NNW 8 | NNW 8 | NNW 9 | NNW 8 | NNW 9 | NNW 9 | NNW 8 | NNW 8 | NNW 7 | NNW 7 | — | NNW 7 | NW 6 |
— | — | — | — | 19 | 310 | 447 | 961 | 607 | 801 | 637 | 705 | 887 | 725 | 731 | 592 | 280 | 124 | — | 51 | 43 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 406 | 0 | 26 | 406 | 406 | 236 | 363 | 260 | 145 | 509 | 202 | 189 | 509 | 293 | 216 | 219 | 29 | 29 | 411 | 197 |
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.











