
Surf Forecasts:
The Reef surf forecast from 15 Sep 2026:
- Best quality surf: Saturday 19 Sep, 7AM (local time) - 8ft (2.5m), 14s period, NNW swell with cross-offshore winds.
- Most powerful swell: Friday 18 Sep, 10PM (local time) - 8ft (2.5m), 16s period, NNW swell with 3,196 kJ wave energy.
- Next surfable swell (1★+): Saturday 19 Sep, 7AM (local time) - 8ft (2.5m), 14s period with NNW 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 Saturday (Sep 19) at 7AM. The primary swell is predicted to be 2.5m and 14s period with a secondary swell of 0.1m and 14s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at The Reef in the next 16 days are 2.5m 16s and forecast to arrive on Friday (Sep 18) at 10PM. 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 6s period and expected on Monday (Sep 21) at 4AM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Sat 19th Sep) | 8ft (2.5m) 14s |
| Best Surf | 7AM (Sat 19th Sep) | 8ft (2.5m) 14s |
| Most Powerful | 10PM (Fri 18th Sep) | 8ft (2.5m) 16s |
Table - best surf conditions forecast for The Reef over the next 16 days.
The Lowdown
Alright, this is Rusty. Let’s talk about what’s on the table for The Reef.
The next 16 days look like a proper test of patience, honestly. We've got a good dose of swell rolling through, but the wind is going to be the main character here, and for a lot of this run, it's gonna be a battle. The water temp is sitting around 66°, which is a bit colder than you'd expect for this time of year, so factor that into your rubber choice.
Looking at Tuesday the 15th and Wednesday the 16th, you can just about scratch those out. We've got some small to building swell, but the wind is howling from the north at 15 to 28 mph, putting a nasty cross-chop on everything. The wave energy is weak to moderate (115–1586), but it's completely unsurfable. Just a mess.
Things start to look a little more interesting by Thursday morning the 17th. The swell is up around 7ft from the NW with a 10-second period, and the wind turns cross-off from the NNE at 19 mph. That cleans it up nicely, but the conditions are still called marginal. It's a looker, not a grommet’s wave at that size—it’s pushing into expert territory.
Friday the 18th is more of the same. Solid 8ft NW swell, but the north wind keeps it lumpy and cross. It’s not clean, and the energy is moderate (1008). You’d be wrestling it all session.
Now, Saturday the 19th – this is the standout. This is what we’ve been waiting for. Morning session is the call. We’ve got a clean 8ft swell from the NNW, but here’s the magic: the period is a very long 14 seconds, and the wind is light offshore from the east at 6 mph. The wave energy is strong (2590), and the report calls it excellent for experienced surfers. This is groundswell, proper energy, and with that offshore breeze, The Reef should be offering up some beautiful, lined-up waves. The long period means longer lulls, but the sets will be well-defined and powerful. This is a reef break, so it will handle that long-period energy perfectly. It’s likely to be a bit crowded, so get out early.
Sunday the 20th is a solid follow-up. Morning still has a light offshore from the ESE with a dropping 6ft NNW swell (period 12 seconds). The wave energy is moderate (828), but conditions are clean and very good. It’s a great option for the intermediate crew stepping down from the Saturday bombs.
The middle of next week, Monday the 21st through Wednesday the 23rd, has smaller surf. The swell drops to around 3ft to 5ft. There are some clean moments, like Tuesday morning the 22nd with a glassy 4ft NW swell (period 12 seconds) and no wind – that’s a sneaky good longboard day, with moderate energy (410). But a lot of the afternoons get choppy again with onshore breezes.
Thursday the 24th morning is another glassy gem. Flat calm, with a 4ft NW groundswell (11-second period). Wave energy is low (282), but perfect for a peaceful dawny on the smaller boards. It’s a quiet one.
Looking into the second week, Friday the 25th and Saturday the 26th get messy again. Saturday the 26th sees a jump in swell back to 7ft from the WNW with a very long 15-second period, and strong wave energy (2340), but the north wind at 19 mph puts a cross-chop on it, making it a marginal proposition at best. It’s promising but less certain as it gets further out. Overall, from Sunday the 27th onwards, the trend is dropping swell with persistent cross and cross-on winds, making it a tough week to get a clean one.
So for the best on offer, it's Saturday morning the 19th of September at The Reef. The 8ft NNW groundswell with a 14-second period and light offshore east wind is your shot at something special. Sunday morning the 20th is the best backup plan for a slightly smaller but still clean session.
That’s the read, folks. See you in the water.
- Rusty
Short Range ForecastMostly dry. Warm (max 21°C on Thu morning, min 17°C on Tue night). Mainly strong winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 28°C on Sun morning, min 19°C on Fri morning). Winds decreasing (fresh winds from the NNW on Fri afternoon, calm by Sun morning). | ||||||||||||||||||||
Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | |||||||||||||||
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 10 | NNW 5 | NNW 7 | NNW 9 | NNW 9 | NNW 10 | NW 10 | NNW 9 | NNW 9 | NNW 9 | NNW 8 | NNW 15 | NNW 14 | NNW 13 | NNW 13 | NNW 12 | NNW 11 | NW 10 | NW 10 | NW 12 | NW 12 |
Wave Graph | |||||||||||||||||||||
63 | 61 | 397 | 1586 | 1494 | 2022 | 989 | 1048 | 1159 | 885 | 499 | 3114 | 2311 | 1520 | 1049 | 835 | 657 | 385 | 250 | 260 | 503 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross | cross-off | cross | cross | cross | cross | cross-off | off | cross-on | cross-off | off | cross-on | cross-off | cross-off | on | cross |
High Tide | 6:02PM2.62m | 6:18AM2.55m | 6:39PM2.37m | 6:56AM2.36m | 7:22PM2.13m | 7:44AM2.16m | 8:22PM1.92m | 8:58AM2.00m | 10:00PM1.81m | 10:42AM1.99m | 11:40PM1.88m | 12:03PM2.12m | 00:41AM2.05m | ||||||||
Low Tide | 11:48AM0.36m | 00:04AM0.50m | 12:25PM0.57m | 00:38AM0.73m | 1:07PM0.80m | 1:19AM0.95m | 2:02PM1.01m | 2:18AM1.13m | 3:32PM1.14m | 4:00AM1.22m | 5:23PM1.11m | 5:40AM1.12m | 6:33PM0.94m | ||||||||
7:18 | — | — | 7:18 | — | — | 7:20 | — | — | 7:20 | — | — | 7:22 | — | — | 7:22 | — | — | 7:22 | — | — | |
— | 7:46 | — | — | 7:45 | — | — | 7:43 | — | — | 7:42 | — | — | 7:39 | — | — | 7:38 | — | — | 7:37 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 19 | 20 | 18 | 18 | 19 | 19 | 21 | 20 | 18 | 21 | 21 | 21 | 27 | 26 | 26 | 28 | 27 | 26 | 27 | 25 | 24 |
Feels °C | 15 | 17 | 13 | 11 | 12 | 13 | 15 | 14 | 13 | 17 | 17 | 17 | 25 | 23 | 23 | 27 | 24 | 24 | 26 | 23 | 22 |
Swell 1 Height (m) Direction Period (s) | NNW 10 | NW 11 | WNW 11 | S 13 | SW 13 | SW 12 | NW 10 | S 12 | SW 16 | NW 15 | NNW 13 | NNW 15 | NNW 14 | NNW 13 | NNW 13 | NNW 12 | NNW 11 | NW 10 | NW 10 | NW 12 | NW 12 |
63 | 33 | 75 | 3 | 6 | 6 | 989 | 3 | 10 | 37 | 299 | 3114 | 2311 | 1520 | 1049 | 835 | 657 | 385 | 250 | 260 | 503 | |
Swell 2 Height (m) Direction Period (s) | WNW 8 | WNW 8 | S 13 | — | — | S 12 | S 18 | S 16 | S 11 | SW 15 | NNW 19 | SW 14 | SW 14 | SW 13 | S 13 | S 13 | S 11 | S 10 | NW 14 | NW 9 | S 12 |
22 | 13 | 3 | — | — | 3 | 6 | 5 | 3 | 9 | 34 | 8 | 8 | 7 | 3 | 3 | 3 | 2 | 89 | 135 | 3 | |
Swell 3 Height (m) Direction Period (s) | WNW 12 | — | — | — | — | — | S 12 | — | — | — | SW 14 | SW 14 | SW 14 | — | — | SW 13 | S 13 | S 12 | S 5 | S 4 | S 12 |
15 | — | — | — | — | — | 3 | — | — | — | 8 | 8 | 8 | — | — | 7 | 3 | 3 | 2 | 2 | 3 | |
Wind waves Height (m) Direction Period (s) | NNW 4 | NNW 5 | NNW 7 | NNW 9 | NNW 9 | NNW 10 | N 9 | NNW 9 | NNW 9 | NNW 9 | NNW 8 | — | — | — | — | — | — | — | — | WNW 3 | NNW 4 |
15 | 61 | 397 | 1586 | 1494 | 2022 | 399 | 1048 | 1159 | 885 | 499 | — | — | — | — | — | — | — | — | 3 | 8 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 26 | 603 | 435 | 425 | 590 | 119 | 29 | 604 | 119 | 29 | 216 | 26 | 0 | 44 | 0 | 0 | 183 | 20 | 0 | 48 | 26 |
Best forecast wave conditions in Ericeira | |||||||||||||||||||||
Best forecast wave conditions in Portugal | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
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.










